MXPA97006075A - Coupling of insulation for a lever unit for the thick finger of a fixing set of one pue - Google Patents

Abstract

The present invention relates to a coupling, for use with a fastening assembly for the door, mounted on a door having an internal face and an external face, the fastening assembly having a latch bolt operated by a lever handle on the internal face and by a thumb lever of a grip handle on the outer face, the bolt latch is biased to an extended position except when retracted by the operation of the handle and the lever for the thumb, the The handle of the internal lever is mounted in a base position on a pivot coupled with the latch bolt, the latch bolt is operated between the extended position and the retracted position by the pivot, the coupling is characterized in that it comprises: means for operating the bolt of the latch; bolt by the lever for the thumb without moving the internal lever from the base position, the means to operate the bolt by the lever for the finger p ulgar without moving the internal lever from the base position, comprise an isolation element so that it is connected in a coupled impulse to the pivot operated by the lever for the thumb, and means to operate the bolt latch by rotating the handle of the internal lever, means for operating the bolt latch by rotating the handle of the internal lever comprise a lever return mechanism for connection to the handle of the lever having a bolt operator and a circular hole in the bolt operator the insulation element is rotatably mounted in the circular hole and has a first impulse projection to provide a loss of motion or vacuum displacement limited with the bolt operator, so that it projects axially outward, towards the lever for coupling in form driven with the bolt operator, and which has a means of impulse cavity centered for coupling in shape driven with the pivot of the hill operator

Description

COUPLING OF INSULATION FOR ONE UNIT OF LEVER FOR THE FINGER THROW OF ON ASSEMBLY OF FIXING OF ONE DOOR Background of the Invention This invention relates in general to door fastening assemblies having external grip handles or grips with thumb levers and internal lever handles or grips, and more particularly to fastening assemblies having an insulating coupling to simplify handling of the handles or cuffs during the installation and operation of the handles or cuffs in the service.

Background of the Invention Doors with fastening sets that have grip handles or grips and thumb levers on the outside and knobs or lever handles on the inside are commonly used in both commercial and residential constructions. In the cases where the knobs are used, only a small return spring of the knob, if any, is necessary to return the knob to its Raf.25441"base" position. In most cases, the only latch extension spring is sufficient to also serve as a return for the knob. The Americans with Disabilities Act (ADA), however, has led to the increased use of internal levers to provide more comfort for people with limited manual strength and dexterity. Such levers make it easier to retract the bolt latch; because they at least triplicate the mechanical advantage produced by the knobs. However, since the levers are inherently out of balance around the axis of the pivot, and since they are also much heavier than the door knobs to withstand the added stresses created by their large mechanical advantage, the return springs necessary to return the levers to their horizontal "base" position without any warpage or weakening, they must be proportionally larger and more rigid. This is not a problem if the levers are used both on the internal and external parts of the door, since in such cases both internal and external levers have the same mechanical advantage; however, when the thumb lever handle is used on the outer side of the door, the low mechanical advantage of the thumb lever makes it very difficult to operate the dead bolt and overcomes the force of the fingers. Mango return springs. For children or people who have limited manual strength and dexterity, it may not be possible to operate a door fixation device with such a configuration. The foregoing illustrates the limitations that are known to exist in current fastener assemblies that utilize levers for the thumb of the clamping handle on the outside and inside the handle of the lever. Accordingly, it may be advantageous to provide an alternative directed to overcome one or more of the limitations described above. Accordingly, a suitable alternative is provided which includes the features described more fully hereinafter.

Brief Description of the Invention In one aspect of the present invention, this advantage is achieved by providing a fastening assembly of a door, mounted on a door having an internal and external face, the fastening assembly having a bolt latch operated by a lever handle from the internal part and by a lever for the thumb of the clamping handle from the external side, the bolt latch is deflected to an extended position except when retracted by the operation of the handles, the internal lever handle is mounted in a position base on a pivot connected to a return mechanism of the lever and having a bolt operator fixed thereto, the improvement, in combination with the fixing assembly, comprises a mechanism for operating the latch bolt by the lever for the finger thumb without moving the internal lever from the base position. The foregoing aspects and other aspects will become apparent from the following detailed description of the invention, when considered in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a fragmentary schematic perspective view, from the side of the door, of a lever unit for the thumb, of the holding handle, typical of the common technique; Figure 2 is a schematic elevation view, from the side of the door, of a handle of the lever and the mounting plate of the common technique; Figures 3a and 3b are schematic elevation views, as in Figure 2, of a lever handle adapted to incorporate the coupling, and with the coupling installed, respectively; and Figures 4a and 4b are front and side elevation views, respectively, of the insulating coupling of the invention.

DETAILED DESCRIPTION OF THE INVENTION Figure 1 shows some details of the structure of a typical handle thumb lever assembly 10, commonly used in fastening assemblies installed in doors. It consists of the holding handle 11, the bowl, or cover of the mechanism or gusset 12, which is frequently formed as a single piece with the handle 11 of the door, and the piece for the thumb or lever for the thumb 13. The thumb lever 13 extends through the wall of the gusset 12 to an axis (not visible) around which it moves in a pivoting manner, and ends as a lifting cam 17 which is pushes against the follower of the cam 16 on the outer end of the pivot 14 to operate the bolt (not shown). The lever 13 for the thumb has a small spring to lift it when released, but the pivot 14 is returned to the base position by the latch bolt extension spring and / or by other springs in the fastener assembly.

The handle of the lever of the common technique, shown in Figure 2, has return springs 28 of the lever, which act on the cage 25 of the spring and, through the rectangular pulse cavity 24, on the pivot 14 to return it to the base position. The lever 21 is fixed to the cage 25 of the spring by the lugs 27 of the pivot which protrude through the arcuate grooves in the spring cage and are fixed with stakes or otherwise secured to the spring cage. Accordingly, any time the lever 21 is moved, the cage of the spring 25 must follow and vice versa. Any rotation of the spring cage 25 is against the deflection produced by the return spring 28 of the lever. The unbalanced weight of handle 21 of the lever requires a strong return spring 28 to properly support the handle of the lever without sinking or flexing; objectionable Accordingly, when a lever 13 for the thumb of the present technique is depressed to retract the bolt, the pivot 14, while retracting the bolt latch (not shown) must overcome the return spring 28 of the bolt. lever. This is a rather difficult task since the lever 13 for the thumb has a very small mechanical advantage compared to that of the handle 21 of the lever.

The lever assemblies shown in Figures 3a and 3b disclose details of the invention. To provide the desired impulse isolation, the spring cage 95 is modified to have a round opening 94 in place of the rectangular pulse cavity 24 of Figure 2. The lugs of the lever pivot are still fixed or secured in the spring cage 95, so that the return springs 28 of the lever still provide the return action for the lever. However, the round opening 94 does not engage the rectangular pulse pivot 14 (Figure 1) in any driving or driven relationship. An object of the invention, especially the isolation of the handle 21 from the handle and its return springs 28 from the thrust pin 14 of the lever for the thumb 13, has thus been carried out. Since it is still desired to operate the bolt latch from both the thumb lever 13 and the handle 21 of the lever, the insulation coupling 110 in Figure 4a is added to the assembly of Figure 3a. Considering Figures 3b, 4a, and 4b, the structure and function of the coupling 110 can be better understood. The coupling 110 has a number (four are shown, for example) of the "bearded" lugs 104 extending axially adjacent the rectangular pulse cavity 124. These lugs 104 are spaced such that they provide a snap fit in the round hole 94 in the cage 95 of the spring, whereby the coupling 110 is fixed or secured axially to the cage 95 of the spring, while the coupling 110 is still allowed to rotate with respect to the cage 95 of the spring. An impulse projection 108 projects axially from the edge of the coupling 110 and extends a sufficient arc distance over its circumference to provide a limited amount of loss of movement between the spring cage 95 and the coupling 110. This loss of movement or idle movement allows retraction of the bolt latch with the thumb lever 13 although only the bolt latch extension spring exceeds the lever support spring for the thumb, if any. The pulse pivot 14 can operate without any connection to the return spring 28 of the lever, when operated by the lever for the thumb 13. The handle of the lever 21, on the other hand, will operate the pulse pivot 14 and the latch bolt by means of the impulse projection 108 on the coupling 110 which is driven in the clockwise direction as seen in Figure 3b by the spring cage 95. When the handle 21 of the lever is released, the cage 95 of the spring, and the handle 21 of the lever are returned to the base position by the return spring 28 of the lever, but because of the round hole 94, the coupling 110 it is not driven to follow the cage 28 of the spring. Instead, the coupling 110 and the pivot 14 are returned to the base position by the latch bolt extension spring which is part of the bolt latch assembly (not shown). The insulation coupling 110 is shown in Figures 4a and 4b. Figure 4a shows the version handled mainly of the coupling, when compared to the version handled to the left in Figure 3b. Note that, as seen in Figure 4b, the coupling 110 is axially symmetric, and the opposite faces are mirror images of each other so that the upper edges of the impulse projections 108 are at 1 o'clock and at 11 o'clock. point, when viewed from the side of the door, for installations on the left and on the right, respectively. The coupling 110 is preferably made as a two-sided reversible part which can be used with the doors that are operated either by only turning the coupling around, but can also be made as a single-sided, single-sided piece. In use, the isolation coupling 110 allows the retraction of a bolt latch using the lever 13 for the thumb, without having to overcome the deflection of the return spring 28 of the lever; because the cage 95 of the spring has a round hole 94 which does not have a pulse connection to the coupling 110. Depending on the handling of the installation, the handles 21 of the lever will drive the isolation couplings 110 either in the clockwise or counterclockwise, respectively, as shown in Figures 3a and 3b.

It is noted that in relation to this date, the best method known by the applicant to carry out the aforementioned invention, is the conventional one for the manufacture of the objects to which it relates.

Having described the invention as above, property is claimed as contained in the following

Claims (4)

1. A coupling, for use with a fastening assembly for the door, mounted on a door having an internal face and an external face, the fastening assembly has a latch bolt operated by a lever handle on the inner face and by a lever for the thumb of a clamping handle on the external face, the bolt latch is deflected to an extended position except when retracted by the operation of the handle and the lever for the thumb, the handle of the internal lever is mounted in a base position on a pivot coupled with the latch bolt, the bolt latch is operated between the extended position and the retracted position by the pivot, the coupling is characterized in that it comprises: means for operating the bolt latch by the lever for the thumb without moving the internal lever from the base position, the means to operate the latch by the lever for the thumb without moving the lever inter na from the base position, they comprise an isolation element so that it is connected in a coupled manner of impulse to the pivot operated by the lever for the thumb; and means for operating the latch bolt by rotating the handle of the internal lever, the means for operating the bolt latch by rotating the handle of the internal lever comprise a return mechanism of the lever for connection to the handle of the lever that it has a bolt operator and a circular hole in the bolt operator; the insulation element is rotatably mounted in the circular hole and has a first impulse projection to provide a loss of motion or vacuum displacement limited with the bolt operator, so that it projects axially outward, towards the lever for coupling in form driven with the bolt operator; and having a thrust cavity means centered for coupling in a driven manner with the pivot of the bolt operator.

2. The coupling according to claim 1, characterized in that the insulating element further comprises: a second impulse projection that projects axially inward to reflect an opposite surface of the insulating coupling and to thereby provide the reversal capability of the manipulation of the fixation set.

3. In a fastening assembly of a door having a handle for holding the lever for the thumb, for mounting on an external face of a door and a lever handle for mounting on an inner face of the door, the lever for the thumb is characterized in that it is coupled to transmit the impulse with an impeller pivot to retract a bolt latch, and the handle for the lever is connected to a spring cage having a lever return spring, a round hole in the center of the spring cage to receive the impulse pivot; an insulating element having a pulse cavity for coupling the drive pivot, a plurality of lugs for rotatably holding the round hole of the spring cage, and an axially projecting projection projection means, for coupling the cage of the spring; the insulating element provides means for operating the latch bolt by the thumb lever without the return spring coupling of the lever, but still allowing the operation of the latch bolt by the handle of the lever.

4. An isolation coupling for a door fastening assembly having an external thumb lever grip handle and an internal lever handle for operating a dead bolt latch, characterized in that it comprises: a substantially circular disk that it has a driving cavity of the driving pin and means for rotatably holding a spring cage fixed to an inner end of the handle of the lever and a driving projection for coupling the spring cage when the spring cage rotates with the handle of the lever , the impulse projection allows the disk to rotate independently of the spring cage to a sufficient degree to operate the latch bolt without moving the spring cage and the handle of the lever.