EP3049346B1 - Cover with a seal for closing a can, and assembly comprising a can and such a cover - Google Patents

Description

The present invention relates to a seal cover for closing a tubular sidewall box and an assembly comprising a tubular sidewall box and a lid of the aforementioned type.

The present invention relates in particular to a lid for closing a tubular side wall box provided with an upper opening and an inner radial collar disposed substantially at said upper opening, said cover comprising, on its so-called face. below, an annular elastically deformable seal, adapted to bear on said flange, in the closed state of the upper opening of the box by said cover.

Such a lid is well known to those versed in this art, as illustrated by the patent FR 2,707,258 wherein a flat annular seal is described.

Because of its design, such a seal hardly fits on some complex box flange shapes. In addition, such a seal, because of its flat shape, has a limited spring effect. Other lids having a seal are known from US2005 / 0023772 and US2002 / 0145939 . An object of the present invention is therefore to provide a lid of the aforementioned type, the seal design allows adaptation of the seal to multiple forms of box collars, an improved spring effect and a centering aid of the lid on the box.

For this purpose, the subject of the invention is a lid for closing a box with a tubular side wall provided with an upper opening and an internal radial flange disposed substantially at said upper opening, said cover comprising, on its so-called underside, an annular seal, elastically deformable, able to bear on said flange, in the closed state of the upper opening of the box by said cover, in the undeformed state, said seal having the general shape of a convex half-torus facing outwardly of the cover, that is to say to the box, characterized in that the seal is attached to the cover by means of an annular ring or an annular ring, said ring defining an open ring. Thanks to the convex shape of the seal, turned not towards the lid, but towards the outside of the lid, this results in an improvement of the spring effect of the seal, in the direction of a spacing of the lid of the box, this which tends, in the presence of means for fixing the lid to the box, formed by fastening means of the cover engaging with the inner radial flange or an outer peripheral rim of the box, to increase the pressure force exerted by the means fixing the lid on the box, which increases the effectiveness of the attachment.

In addition, the convex shape allows the joint to be adapted to a large number of internal radial box collar shapes.

Finally, the convex shape of the seal helps to center the cover relative to the box.

Preferably, the half-torus is hollow. This hollow embodiment of the half-torus facilitates the deformation of the seal and the adaptation of the joint to complex shapes of collars.

Preferably, the half-torus is open on the face of the half-torus turned towards the lid. Again, this embodiment facilitates the deformation of the seal and in particular, the crushing of the seal and the adaptation of the seal to complex shapes of collars.

Preferably, the half-torus, which comprises an inner circumferential edge and an outer circumferential edge, is connected to the cover by a connecting zone disposed at one of its circumferential edges, and in that the other circumferential edge of the circumferential edge half-torus is free.

This circumferential edge of the half-torus devoid of a zone of connection to the lid, is therefore a free edge, that is to say an edge whose deformation is not hampered by a possible zone of connection of the edge to the lid. This results in better sealing and greater adaptability to different box formats. In addition, the absence of binding at the circumferential edge prevents the seal from marking or pinching.

Alternatively, the half-torus which comprises an inner circumferential edge and an outer circumferential edge, is connected to the cover by a connecting zone disposed at each of these circumferential edges. However, the lack of possibility of crushing the seal can affect its effectiveness.

Preferably, in the case of a ring, the ring is inserted into an annular housing of the bottom face of the lid bottom. In particular, the ring is forced into said housing.

Preferably, in the case of a ring, the ring and the seal are overmolded. Preferably, in the case of an annular ring, said ring is housed inside the seal and acts by pushing on the inner circumferential edge of the seal to insert it into a groove on the underside of the lid.

Preferably, the cover comprises a handle and, preferably, a central opening provided for the rotation shaft of a mixing assembly.

Preferably, the cover comprises fixing means for fixing the lid to the box. Generally, these fixing means are configured to allow, during their passage from an inactive position to an active position of attachment to the box, to press the seal of the cover against the inner radial flange of the box.

In a first embodiment of the invention, the fixing means comprise two cam levers, rotatable, loaded by spring, and movable axially by cooperation of so-called complementary surfaces carried respectively by the cover and the cam lever during the rotational drive of the cam levers to move from a closed position of cover in which the cam bears under the collar of the box to an open position in which the cam is disengaged from said collar, the axial displacement of the cam lever in the direction of a distance from the cover of the cam causing a compression of the spring.

In a second embodiment of the invention wherein the lid is of the type for closing a box further provided with an external radial peripheral flange disposed substantially at said upper opening, the fixing means comprise at least two tabs extending around said seal and at least partially protruding from the underside of the cover, at least one of the tabs being movably mounted in the direction of a bringing together and a spacing of the other tab or legs, each or at least two of the tabs having an active attachment portion formed by a portion of the tab projecting towards the center of the lid, this active part being able to be positioned under said outer radial peripheral rim of the box in the close position of said tabs corresponding to the active position of closure of the lid.

These tabs can be simple elastically deformable tabs.

Preferably, one of the movable tabs provided with an active attachment part is, for the displacement of its active attachment part between a close position and a position separated from the active part for fixing the other tabs, mounted movably around an axis or in a plane substantially parallel to a circumferential plane of the annular seal and the cover comprises, for said at least one movable tab means for locking the pivoting of said movable tab in a position close to its active attachment part the active part fixing the other leg or tabs, these locking means being unlockable.

Preferably, the movable tab is a pivoting tab and the locking means are at least partially elastically deformable and are able to move from the locked position to the unlocked position or vice versa by elastic deformation combined with a pivotal movement of the pivoting mobile tab .

Preferably, the locking means comprise first locking means mounted integral beyond the pivoting mobile tab and the second stationary locking means, said first and second locking means being coupled in the locked position and uncoupled in the unlocked position.

Preferably, these first and second locking means are of the male-female type.

Preferably, the active attachment portion of said at least one pivotable mobile tab is elastically deformable.

Preferably, the or at least one of the pivoting movable lugs is pivotally mounted by means of a pivotally movable drive control lever, and the first pivotal locking means of said pivotable movable lug. are carried by said control lever and the second locking means are carried by the handle.

Preferably, the so-called top face of the lid opposite to the underside forms a spout, this pouring spout having a seat of a shutter, said seat being inclined downwardly from the outer peripheral edge towards the center of the lid said shutter being equipped with return means in the closed position and a pivoting lever for controlling the opening of the active shutter against said return means.

The inclination of the seat reduces the control effort to be applied to said shutter release control lever.

The subject of the invention is also an assembly of the type comprising, on the one hand, a tubular sidewall box provided with an upper opening and an inner radial flange disposed substantially at the level of the said upper opening and, on the other hand, a cover for closing the box, this cover designed to cover the upper opening of the box, comprising on its underside said annular seal, elastically deformable, adapted to bear on said collar in the state closed the upper opening of the box by said lid.

• la figure 1A représente une vue en perspective d'un couvercle conforme à l'invention en position déverrouillée de ladite patte mobile pivotante et en position écartée de la partie active de fixation de la patte mobile pivotante des parties actives de fixation des autres pattes ;
• la figure 1B représente une vue en perspective d'un couvercle équipé de leviers à came ;
• la figure 2 représente une vue de côté d'un ensemble boîte - couvercle au cours de la fixation du couvercle à la boîte, le couvercle étant positionné au-dessus de l'ouverture supérieure de la boîte ;
• la figure 3 représente une vue en perspective d'un ensemble boîte - couvercle dans lequel les parties actives de fixation des pattes du couvercle sont positionnées sur la boîte à un niveau inférieur au rebord périphérique radial interne de la boîte, la patte mobile étant en position déverrouillée, avec sa partie active de fixation écartée des parties actives de fixation des autres pattes ;
• la figure 4 représente une vue en perspective d'un ensemble boîte - couvercle dans lequel les parties actives de fixation des pattes sont en position rapprochées et la patte mobile pivotante est verrouillée en pivotement ;
• la figure 5 représente une vue en coupe de couvercle en position verrouillée de la patte mobile pivotante ;
• la figure 6 représente une vue en perspective d'un couvercle pris sous un autre angle ;
• la figure 7 représente une vue en perspective d'un joint seul, prise côté face du joint tournée vers la face du dessous du couvercle ;
• la figure 8 représente une vue en perspective d'un joint seul, prise côté face convexe du joint tournée vers l'extérieur du couvercle ;
• la figure 9 représente une vue partielle du joint et de sa bague annulaire de fixation au couvercle à l'état positionné du couvercle au-dessus d'une boîte ;
• la figure 10 représente une vue partielle du joint et de sa bague annulaire de fixation au couvercle à l'état appliqué du couvercle sur l'ouverture supérieure de la boîte ;
• la figure 11 représente une vue en coupe d'un couvercle en position déverrouillée de la patte mobile coulissante.
• la figure 12 représente une vue en coupe d'un couvercle en position verrouillée de la patte mobile coulissante.
• la figure 13 représente une vue en coupe d'un couvercle avec son joint et les moyens de fixation du joint au couvercle.
• la figure 14 représente une vue en perspective d'un ensemble couvercle/joint/jonc de fixation du joint en position éclatée desdits éléments.

The invention will be better understood on reading the following description of exemplary embodiments, with reference to the appended drawings in which:

• the Figure 1A is a perspective view of a lid according to the invention in the unlocked position of said pivoting movable lug and in the spaced apart position of the active part for fixing the pivoting mobile lug of the active parts for fixing the other lugs;
• the Figure 1B represents a perspective view of a lid equipped with cam levers;
• the figure 2 is a side view of a box-lid assembly during attachment of the lid to the box with the lid positioned above the top opening of the box;
• the figure 3 is a perspective view of a box-lid assembly in which the active fastening portions of the lid tabs are positioned on the box at a lower level than the internal radial peripheral flange of the box, the movable tab being in the unlocked position, with its active attachment part spaced apart from the active attachment parts of the other legs;
• the figure 4 is a perspective view of a box-lid assembly in which the active parts for fixing the tabs are in close position and the pivoting mobile tab is pivotally locked;
• the figure 5 represents a lid sectional view in the locked position of the pivoting mobile tab;
• the figure 6 represents a perspective view of a lid taken from another angle;
• the figure 7 is a perspective view of a single seal, taken on the face side of the seal facing the underside of the lid;
• the figure 8 is a perspective view of a single seal, taken on the convex face side of the seal facing outwardly of the lid;
• the figure 9 represents a partial view of the seal and its annular ring for fixing to the lid in the positioned state of the lid above a box;
• the figure 10 represents a partial view of the seal and its annular ring for fixing to the cover in the applied state of the cover on the upper opening of the box;
• the figure 11 is a sectional view of a lid in the unlocked position of the sliding mobile tab.
• the figure 12 is a sectional view of a lid in the locked position of the sliding mobile tab.
• the figure 13 is a sectional view of a lid with its seal and the attachment means of the seal to the lid.
• the figure 14 represents a perspective view of a cover / seal / ring assembly of the seal in the exploded position of said elements.

As mentioned above, the subject of the invention is a lid 1 for closing a box 30 and the assembly formed by the lid and the box.

As shown in the figures, the box 30, such as a paint box, has a tubular lateral wall 31 provided near one end with an internal radial flange 32 delimiting an upper opening 34. substantially circular.

This tubular lateral wall 31 of the box further comprises an outer radial peripheral rim 33 also disposed substantially at the level of the upper opening 34 and the inner radial collar 32.

The upper opening 34 of the box 30 is able to be closed by the lid 1. This lid 1 comprises a bottom face provided with an annular sealing gasket 4 adapted to bear on said flange 32 in the state closed the upper opening 34 of the box 30 by said lid.

In the undeformed state, said sealing gasket 4 has the general shape of a convex half-torus turned towards the outside of the lid 1.

The convex surface of the gasket 4 is thus turned towards the outside of the lid, so that the face 6 of the gasket 4 facing the underside of the lid 1 corresponds to the face of the gasket passing through the cutting plane of the half -tore.

In the examples shown, the half-torus is hollow and open, face-side 6 of the half-torus turned towards the cover 1.

Of course, alternatively, the half-torus could have been made full but this solution is not preferred.

This seal 4 has an inner circumferential edge 7, an outer circumferential edge 8 and a zone 9 of connection to the lid 1 disposed at one of the circumferential edges.

In the example shown, the connecting zone 9 is disposed at the inner circumferential edge 7 of the seal 4 and the outer circumferential edge 8 is free.

Of course, a solution in which the zone 9 of connection to the lid is disposed at the outer circumferential edge of the seal while the inner circumferential edge of the seal is free is also possible.

Likewise, a solution in which a lid-engaging zone is disposed at each of the circumferential edges of the gasket is also conceivable, but not preferred.

In the examples shown in Figures 1 to 10 , the seal 4 is attached to the lid by means of an annular ring. This annular ring is secured to the inner circumferential edge of the seal and is housed by forced insertion into an annular recess in the underside of the cover. Ideally, the annular ring 10 is overmolded on the seal, which avoids any risk of error assembly.

In the example shown in figures 13 and 14 , the seal 4 is attached to the lid by means of an annular ring 10 'elastically deformable delimiting an open ring. The free ends of the ring are bent to form bearing surfaces of the fingers of an operator to allow, by reducing the diameter of the ring formed by the ring, during a coming together of the free ends, the insertion of the ring inside the joint. The loosening of the ring causes an increase in the diameter of the ring by spacing the free ends of the ring. With this increase in diameter, the rod generates on the inner circumferential edge of the seal a thrust which ensures the introduction of said seal edge in an annular groove formed on the underside of the lid.

The cover further comprises means 14 for fixing the lid 1 to the box 30.

In the example shown in Figure 1B , the fastening means 14 comprise two levers 141 to cam, rotating, loaded by spring 142, and axially displaceable by cooperation of complementary surfaces 143 respectively carried by the cover 1 and the lever 141 to cam during the driving in rotation of levers 141 to cam to move from a closed position of the cover 1 in which the cam bears under the flange 32 of the box 30 to an open position in which the cam is disengaged from said flange 32, the axial displacement of the lever 141 to cam in the direction of a distance from the cover 1 of the cam causing compression of the spring 142.

When the box is provided, furthermore, with an external radial peripheral rim 33 disposed substantially at the level of said upper opening 34, the fixing means 14 may comprise instead of cam levers at least two tabs 144 extending around said gasket 4 and at least partially projecting from the underside 2 of the lid 1.

At least one of the tabs 144 can be mounted movably in the direction of a bringing together and a spacing of the other tabs 144. Each or at least two of the tabs 144 has an active part 145 fixing formed by a part of the tab 144 projecting towards the center of the lid. This active part 145 is able to be positioned under said outer peripheral peripheral rim 33 of the box 30 in a position close to said tabs 144 corresponding to the active closing position of the lid 1.

In an embodiment not shown, these tabs can be made in the form of simple elastically deformable tabs which, when the cover is positioned above the upper opening of the box and moved towards said opening, deviate passage of the rim 33 external device of the box before tightening under said rim and come into engagement therewith.

These tabs can also be made in the form of three tabs arranged around the annular seal and extending projecting from the underside of the cover. These three tabs are arranged spaced apart from each other on the circumference of the lid.

The underside 2 of the lid is provided on at least a portion of its periphery with an annular rim forming a fallen edge of the underside. This annular border covers at least a portion of the tubular lateral wall 31 of the box when the lid is positioned on the upper opening 34 of the box 30.

Two of the tabs are rigid tabs made in one piece with said annular rim.

Each of the tabs 144 has an active attachment portion formed by a portion of the protruding tab toward the center of the lid. The active portion 145 fixing each of the rigid tabs is formed by a notch or tooth formed on the surface of the tab facing the center of the lid.

The third leg may be a movable tab movable between a close position and a position away from its active attachment portion 145, the active part of fixing the other legs.

These active attachment parts are able to be positioned under the external peripheral peripheral rim 33 of the box in the close position corresponding to the active closing position of the lid, when the lid 1 is positioned on the upper opening 34 of the box.

The third tab is, for the displacement of its active part of fixing between a close position and a position separated from the active part of fixing of the other legs mounted to pivotably about an axis (XX ') substantially parallel to a circumferential plane seal 4 annular sealing.

As illustrated by Figures 11 to 12 , the third tab may be for the displacement of its active attachment part between a close position and a position spaced from the active part for fixing the other tabs, mounted to slide in a plane substantially parallel to the circumferential plane of the annular seal 4 of sealing.

In this case, said tab is loaded by spring, said spring tending to recall the sliding tab in the close position of its active portion for fixing the active part of fixing the other tab or tabs.

The cover comprises, for said pivotable mobile tab, means 19 for locking the pivoting of said pivoting mobile tab in position close to its active part fixing the active attachment part of the other legs, these locking means 19 being unlockable.

In the example shown, the pivoting mobile tab affects, between its pivot connection and its free end, the shape of a V whose branch of the V which carries the free end of the tab forms the active part of fixing the tab .

In the example shown, this active part for fixing the pivoting mobile tab is elastically deformable. The elastic deformation takes place by bringing the branches of the V.

The other leg of the V is provided with two axis portions each inserted in a bearing axis formed in the rest of the lid. Axle bearing and axle portion form the elements of the pivot connection allowing pivotal mounting of the pivoting mobile tab 144.

For the operation of the pivoting mobile lug, the cover comprises a drive control lever 20 in pivotal movement of the tab. This control lever 20 is here made in one piece with the tab and forms an extension of the leg V of the leg equipped with a pivot connection.

The means 19 for locking the pivoting mobile lug in position close to its active attachment part of the active attachment part of the other lugs comprise first locking means 19 integral with the pivoting mobile lug and the second means Stationary locking means, these first and second locking means being coupled in the locked position and uncoupled in the unlocked position.

These first locking means 191 are formed by a notch or lug carried by the control lever 20 and the second locking means 192 are formed by a slot in the handle, in particular in the vertical leg of the handle.

In the coupled state corresponding to the locked position, the notch fits into the light.

For unlocking, the lever being elastically deformable, simply press the notch which generates a deformation of the lever, which allows an output of the notch of the light. Once unlocked, the movable lug may be driven in pivotal displacement in the direction of a spacing of its active portion for fixing the active parts for fixing the other tabs.

For the locking, the procedure is the reverse: the pivoting mobile tab is controlled in pivoting movement in the direction of approximation of its active attachment part of the other active attachment parts or the center of the cover, to a position wherein the notch carried by the lever for driving movement of the tab comes snap fit into the lumen formed in the handle 12.

In the case of a movable sliding lug, the means 19 'for locking the sliding of the lug are formed by a screw with a screw wheel that can be screwed / unscrewed into the lid, the free end of the screw coming to bear on the lug in position locked.

In the examples shown, the lid further comprises a handle 12. This external radial handle 12 has the shape of an inverted L.

Note that in the example shown, the horizontal arm of the inverted L of the handle is recessed here to allow the housing of the drive control lever 20 to move in pivotal movement of the movable pivoting lug and its passage from a position to another.

In the examples shown, the lid also has a face 3 of the top opposite to the underside 2 which forms a spout 15. This spout 15 has a seat 151 with a shutter 16. This seat 151 is formed by the open top surface of the spout.

In the examples shown, the seat 151 of the spout 15 is inclined to downward slope from the periphery towards the center of the lid 1. The shutter 16 is a sliding shutter equipped with means 17 for return in the closed position and a lever 18 pivoting opening control active against said means 17 recall. The shutter opening control pivot lever 18 overcomes the pivoting mobile tab.

The shutter 16 is here formed by a simple plate and the return means 17 are made in the form of a hairpin spring whose cooperation with the shutter is already known from the state of the art and therefore will be not described in detail.

The shutter opening control pivoting lever 18 which overcomes the pivoting or sliding mobile tab is pivotally mounted about an axis parallel to the pivot axis (XX ') or to the plane of movement of the movable paw he overcomes.

This pivoting shutter opening control lever 18 furthermore forms, if necessary, during the shutter opening control, a locking control member of the locking means 19 for pivoting the movable tab. pivoting member surmounted by said lever 18 when said movable tab is a pivoting lug.

Indeed, if the lever 20 for driving control in pivoting movement of the movable tab has not already been actuated for the supply of the movable tab in the locked position, it can be actuated by the lever 18 shutter opening control pivot 16 which overcomes it.

Thus, the passage of the shutter from the closed position to the open position can allow in parallel the passage of the tab from the unlocked position to the locked position.

When the lid 1 is an agitator lid, the lid 1 further comprises a central opening 13 provided for the rotation shaft of a mixer assembly.

In practice, the closure of a box with a lid as described above can be done as follows: the lid 1 is positioned with its underside facing the upper opening of the box . The pivoting mobile lug of the lid is unlocked and its active attachment part is moved away from the active parts of attachment of the other fixing lugs or the center of the lid.

The active parts for fixing the rigid tabs, that is to say non-pivoting are positioned under the outer peripheral rim 33 of the box. The pivoting mobile tab is, via its control lever 20 which is operated by the hand of the operator who holds the grip 12 of the lid, driven in pivoting motion to a position in which the part active attachment of the pivoting mobile lug is disposed by pressing on the underside of the rim 33 outer radial peripheral, that is to say the face of the rim 33 external radial peripheral turned towards the bottom of the box opposite the face end of the box that carries the top opening.

In this position of the tab, the notch 191 of the pivoting drive control lever 20 of the movable tab 144 is inserted into the light 192 of the handle and the locking of the tab operates so that any movement to pivoting of tab 144 in an opposite direction is prevented.

The fixing of the cover 1 to the box is completed.

Alternatively, it can be provided to first bring the active part fixing the pivoting mobile tab under the peripheral rim of the box before exerting a thrust on the lid and push the lid to bring the active parts of the fixing rigid tabs 144 under the peripheral rim of the box. The actuation of the mobile tab and its locking then operate as described above.

When the movable tab is a sliding tab as shown in FIG. figure 11 , the operator exerts traction on the tab 144 against the spring to move it away from the other legs and release said tab whose active attachment portion is positioned under the outer radial peripheral rim of the box in the support position against the outer face of the peripheral wall of the box. It is then locked in position of said tab.

The shutter of the spout can be actuated in the direction of an opening with the lever 18 pivoting. Releasing the lever 18 automatically causes the shutter to return to the closed position, using the return means 17.

To separate the lid of the box, it is sufficient to exert pressure on the notch 191 in the direction of an extraction of the notch 191 of the light 192, and then to cause the tab 143 to pivotally move in the direction of rotation. a separation of the active part for fixing the tab of the active parts for fixing the other tabs or the center of the cover.

For actuation of the movable pivoting lug in the direction of approximation of its active attachment part of the active attachment parts of the other legs, it is possible to act on the lever 18 for operating the shutter, this lever 18 coming, during its pivoting, bearing on the operating lever 20 and driving it to an end position position in which it is locked.

It will be noted that the operations of the lever 18 for controlling the opening of the shutter and the lever 20 for controlling the drive in pivotal displacement of the tab 144 are carried out by the hand of the operator holding the handle 12. It is the thumb of this hand, which allows to act on these two levers.

Thus, despite the presence of two levers, one hand is sufficient to operate these two levers.

Claims (13)

1. A cover (1) for closing a can (30) with a tubular side wall (3) provided with an upper opening (34) and an inner radial flange (32) positioned substantially at said upper opening (34), said cover (1) comprising, on its so-called bottom face (2), an elastically deformable annular seal (4), able to bear on said flange (32), in the state of the upper opening (34) of the can (30) closed by said cover (1), in the non-deformed state, said seal (4) assuming the general shape of half a torus with its concave side turned toward the outside of the cover,
   characterized in that the seal (4) is fastened to the cover (1) via an annular ring (10) or an annular strip (10'), said strip (10') defining an open ring.
2. The cover (1) according to claim 1,
   characterized in that the half-torus is hollow.
3. The cover (1) according to one of the preceding claims,
   characterized in that the half-torus is open on the side of the face (6) of the half-torus turned toward the cover (1).
4. The cover (1) according to one of the preceding claims,
   characterized in that the half-torus, which comprises an inner circumferential edge (7) and an outer circumferential edge (8), is connected to the cover (1) by a connecting zone (9) positioned at one (7) of its circumferential edges (7, 8), and in that the other circumferential edge (8) of the half-torus is free.
5. The cover (1) according to one of claims 1 to 3,
   characterized in that the half-torus, which comprises an inner circumferential edge (7) and an outer circumferential edge (8), is connected to the cover (1) by a connecting zone (9) positioned at each of these circumferential edges (7, 8).
6. The cover (1) according to one of the preceding claims,
   of the type whereof the seal (4) is fastened to the cover (1) via an annular ring (10), characterized in that the ring (10) and the seal (4) are overmolded.
7. The cover (1) according to one of claims 1 to 5, of the type whereof the seal (4) is fastened to the cover (1) via an annular ring (10),
   characterized in that the ring is inserted into an annular housing of the bottom face of the bottom of the cover.
8. The cover (1) according to one of the preceding claims,
   characterized in that it comprises a handle (12) and, preferably, a central opening (13) provided for the rotation shaft of a mixing assembly.
9. The cover (1) according to one of the preceding claims,
   characterized in that it comprises fastening means (14) for fastening the cover (1) to the can (30).
10. The cover (1) according to claim 9,
    characterized in that the fastening means (14) comprises two rotary cam levers (141), loaded by springs (142), and movable axially by cooperation of so-called complementary surfaces (143) respectively supported by the cover (1) and the cam lever (14) during the rotational driving of the cam levers (14) to go from a closed position of the cover (1), in which the cam bears under the flange (32) of the can (30), to an open position, in which the cam is freed from said flange (32), the axial movement of the cam lever (14) in the direction moving the cover (1) away from the cam causing compression of the spring (142).
11. The cover (1) according to claim 9, of the type for closing a can (30) further provided with an outer radial peripheral rim (33) positioned substantially at said upper opening (34),
    characterized in that the fastening means (14) comprise at least two tabs (144) extending around said seal (4) and at least partially protruding from the bottom face (2) of the cover (1), at least one of the tabs (144) being mounted moving in the direction coming closer to and further from the other(s) (144), each or at least two of the tabs (144) having an active fastening part (145) formed by part of the tab (144) protruding toward the center of the cover (1), this active part (145) being able to be positioned below said outer radial peripheral rim (33) of the can (30) in the close position of said tabs (144) corresponding to the active closing position of the cover (1).
12. The cover (1) according to one of the preceding claims,
    characterized in that the so-called top face (3) of the cover opposite the bottom face (2) forms a spout (15), this spout (15) having a seat (151) for a closing member (16), said seat (151) being inclined sloping downward from the outer peripheral edge toward the center of the cover, said closing member (16) being equipped with means (17) for returning to the closed position and a pivoting lever (18) controlling opening of the closing member (16) active against said return means (17).
13. An assembly of the type comprising a can (30) with a tubular side wall (31) provided with an upper opening (34) and an inner radial flange (32) positioned substantially at said upper opening (34), on the one hand, and a cover (1) closing the can (30), on the other hand, this cover (1) being sized to cover the upper opening (34) of the can (30), including, on its so-called bottom face (2), an elastically deformable annular seal (4), able to bear on said flange (32) in the state of the upper opening of the can closed by said cover, characterized in that said cover (1) is according to one of claims 1 to 12.

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