The hammer device certainly of hammer power is produced from using compressed air
Technical field
The present invention relates to metal plate maintenance technique field, specially a kind of suitable automobile metal plate maintenance, industrial sheet metal box body dimension
Repair, household metal plate furniture maintenance device more particularly to it is a kind of using compressed air be produced from hammer power from hammer device.
Background technique
The vehicle enclosure metal plate overwhelming majority is double-layer structure, and outer layer metal plate generates recess due to shock, and most effective
Maintenance method is exactly to be tapped using iron hammer by the side that vehicle interior metal plate protrudes, still, since metal plate is double-layer structure,
Having to internal metal plate to destroy could be possible to tap to external metal plate, after the completion of external metal plate is repaired, then destroying
Inside metal plate REPAIR WELDING;It is repaired in this way, it is larger to vehicle metal damage degree, it eliminates do not have to already.
Shown in Figure 1, Fig. 1 shows a kind of structure principle chart of prosthetic device in the prior art;
The renovation technique drawn on hammer manually is used in the reparation of present plates of automobile, with the source of welding current the spot welding of top end of sliding rod
Head is welded on the recess of external metal plate, and operator needs to hold the tail end of drawing slide bar on the other hand, holds manual sliding hammer on the other hand,
It is quickly firmly slided to drawing slide bar tail end, when sliding hammer hits slide bar tail end locating piece, slide bar drives metal plate recess outside
Thus recess metal plate is pulled out, achievees the purpose that metal plate reparation by movement.
Prosthetic device in the prior art is controlled and is drawn due to being the size for determining impact strength with the sliding strength of hand
Pull out force degree becomes extremely difficult, if strength crosses senior general and protrudes the metal plate of recess reversely, is also tapped protruding point with hand hammer
It goes back, forms secondary reparation, work difficulty increases;If strength is too small, the position deformation very little of metal plate recess needs repeatedly anti-
Multiple welding and hammering drawing;Furthermore it needs two hands of worker while operating, work number of repetition increases, so that metal plate repairs work
The efficiency of work substantially reduces.
Summary of the invention
The purpose of the present invention is be to solve to repair the technology of big difficulty, great work intensity and low efficiency in the prior art to ask
Topic, provide a kind of structure novel, hammer power is produced from using compressed air with realize to metal plate surface generate pulling capacity from hammering into shape
Device.
To achieve the goals above, the invention provides the following technical scheme:
The hammer device certainly that hammer power is produced from using compressed air of the invention, comprising:
Shell, the shell are formed with work department and operation portion, are formed as installing chamber in the work department;
It is integrated in the indoor cylinder block of the installation cavity, is formed as working chamber inside the cylinder block;
It is formed in the compressed air channel of the operation portion, hammering switch is installed on the operation portion, the hammering is opened
Close the connected state to switch the compressed air channel;
Described working chamber one end is integrated with impact body component, the other end of the working chamber is integrated with hammering piston component;
The gas chamber circumferentially distributed along the cylinder block is reserved between the cylinder block and shell;
Circumferentially fixed there are sealing rubber ring in the middle part of cylinder block, sealant in the middle part of the cylinder block in the middle part of the cylinder block along its
The gas chamber is divided into hammering air plenum and hammering piston return gas chamber by circle;
The hammering air plenum and the compressed air channel communicatively receive the external compressed air conveyed;
It is formed with scavenging air valve gas chamber between the front end of the cylinder block and the shell, is embedded with and changes in the scavenging air valve gas chamber
Air valve piston component;
By changing the indoor air pressure of scavenging air valve gas, the scavenging air valve piston component can be along the scavenging air valve gas chamber
Sliding is to form sealing close to the cylinder block and with the cylinder block or far from the cylinder block and between the cylinder block
Form gas chamber before hammering piston;
Have in the cylinder block and sequentially passes through the impact body component, hammering piston component, scavenging air valve piston component
Copper electrode;
Described copper electrode one end and the impact body component are connected and extend partially on rear side of the impact body component, described
The other end of copper electrode extends to the outside of the shell;
One end that the copper electrode is placed in the shell exterior is formed as welding ends, which connects with Awaiting Overhaul metal plate surface
Touching;
The part that the copper electrode is placed in impact body component rear end is connected with impact return spring.
Further, the cylinder block is in hollow oval barrel structure, and the outside of the cylinder block is formed with along its circumferential direction
Two annular grooves being recessed inwardly;
When the cylinder block and the shell assemble, it is empty that the inside of the annular groove and the shell is formed as the hammering
Gas gas chamber and hammering piston return gas chamber;
The connection hammering piston return gas is offered in the cylinder block and at the hammering piston return gas chamber
The bleeder port of room and working chamber;
The working chamber of the cylinder block is formed as piston rear gas chamber.
Further, the impact body component includes the impact body embedded in the cylinder block end, the impact body direction
One end is fixed with damping of shocks rubber ring inside the cylinder block, which is set to the outer of the copper electrode
Portion;
The copper electrode is threadedly coupled with the impact body;
The impact body is fixed with the impact return spring towards cylinder block lateral ends, and the impact return spring is
The impact body provides the copper electrode mobile Reverse recovery power;
The impact body and the contact surface of the cylinder block have cylinder back-end sealing circle.
Further, the copper electrode is placed in one end on rear side of the impact body component and electrically connects with outside weldings positive pole
It connects;
After the source of welding current is powered, the welding ends of the copper electrode passes through welding current and the solid welding of Awaiting Overhaul metal plate point
Even.
Further, the hammering piston component includes the hammering piston inside the cylinder block, and the hammering is lived
Hammering piston center hole is offered at plug axis, the copper electrode is arranged in the hammering piston center hole, the hammering piston
Hammering piston center hole and the junction of the copper electrode piston center hole sealing rubber ring is installed;
The junction of the hammering piston and the cylinder block is equipped with outside piston sealing rubber ring.
Further, the scavenging air valve piston component includes being embedded in the indoor ventilation valve piston of the scavenging air valve gas, described
Ventilation valve piston can be slided along the scavenging air valve gas chamber;
There is scavenging air valve piston center hole at the axis of the ventilation valve piston, the copper electrode is arranged in the scavenging air valve
In piston center hole;
The both ends of the ventilation valve piston are respectively provided with scavenging air valve piston rear end sealed rubber ring and scavenging air valve piston nose is close
Sealing ring;
The junction of the ventilation valve piston and copper electrode is equipped with scavenging air valve piston centre sealing rubber ring;
The scavenging air valve piston component further includes the ventilation valve body with shell assembly, the ventilation valve piston assembly
In in the ventilation valve body scavenging air valve is formed with the ventilation valve body;
Pass through scavenging air valve outside piston cushion rubber and ventilation valve body center between the ventilation valve piston and ventilation valve body
Sealing ring forms sealing;
It is described ventilation valve piston and copper electrode have scavenging air valve piston pressure balancing spring.
Further, the compressed air channel includes the first gas circuit and the second gas circuit, and first gas circuit is open at one end
The hammering air plenum is extended in the other end of the operation portion, first gas circuit and is connected with the hammering air plenum
It is logical;
The opening that first gas circuit is formed on the operation portion is connected to external compression air air feed equipment and to institute
It states in hammering air plenum and conveys compressed air;
Second gas circuit by hammering switch embedded groove be connected to first gas circuit, and second gas circuit with it is described
Scavenging air valve gas chamber is connected to and conveys compressed air into the scavenging air valve gas chamber.
Further, the hammering switch is in hammering switch embedded groove, and hammering switch can be along institute
State hammering switch embedded groove sliding;
When the hammering switch switchs embedded groove slid inward along the hammering, the second gas described in the hammering switch cutoff
The connection on road and first gas circuit.
In the above-mentioned technical solutions, a kind of hammer device certainly being produced from hammer power using compressed air provided by the invention, tool
Have it is following the utility model has the advantages that
1, hammer device certainly of the invention plays promotion to internal functional unit using gas interior compression air to generate outward
Pulling capacity, meanwhile, copper electrode is welded and fixed in the way of spot welding with metal plate surface, after spot welding impact body component and hammering live
Plug assembly drives copper electrode rearward drawing, to realize the design mesh that can repair metal plate depressed area from metal plate outer surface
's;
2, hammer device certainly of the invention realizes drawing using impact body return spring and scavenging air valve piston pressure balancing spring
Copper electrode, impact body and the returning quickly for hammering piston afterwards are provided convenience condition for pulling plate next time.
3, the apparatus structure of hammer certainly of the invention is novel, can realize metal plate layer structure without destroying metal plate endothecium structure
Depressed area, and it is easy to operate, whole control utilizes electrode and compressed air collective effect, and repairing effect is good.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only one recorded in the present invention
A little embodiments are also possible to obtain other drawings based on these drawings for those of ordinary skill in the art.
Fig. 1 is a kind of structure principle chart of prosthetic device in the prior art;
Fig. 2 is that a kind of assembly from hammer device for being produced from hammer power using compressed air disclosed by the embodiments of the present invention is overlooked
Figure;
Fig. 3 is sectional view along A-A in Fig. 2;
Fig. 4 is a kind of structural blast from hammer device that hammer power is produced from using compressed air disclosed by the embodiments of the present invention
Figure.
Description of symbols:
1, shell;2, impact body component;3, piston component is hammered;4, scavenging air valve piston component;5, copper electrode;6, cylinder
Body;
101, air plenum is hammered;102, piston return gas chamber is hammered;103, piston rear gas chamber;104, scavenging air valve gas chamber;
105, gas chamber before hammering piston;106, work department;107, operation portion;
201, impact body;202, impact body return spring;203, impact body rubber buffer ring;
301, piston is hammered;302, piston center hole sealing rubber ring;303, outside piston sealing rubber ring;
401, ventilation valve piston;402, scavenging air valve piston pressure balancing spring;403, scavenging air valve piston nose sealed rubber ring;
404, scavenging air valve piston rear end sealed rubber ring;405, scavenging air valve piston centre sealing rubber ring;406, scavenging air valve outside piston cushion rubber;
407, ventilation valve body central seal circle;408, ventilation valve body;
501, welding ends;
601, cylinder middle section sealing rubber ring;602, bleeder port;603, cylinder back-end sealing cushion rubber;
701, the first gas circuit;702, the second gas circuit;703, hammering switch;704, hammering switch embedded groove.
Specific embodiment
In order to make those skilled in the art more fully understand technical solution of the present invention, below in conjunction with attached drawing to this hair
It is bright to be further detailed.
Referring to shown in Fig. 1 to Fig. 2;
Fig. 1 shows a kind of structural blast from hammer device that hammer power is produced from using compressed air disclosed in the present embodiment
Figure, Fig. 2 shows a kind of assembling structure cross-sectional views that hammer power is produced from using compressed air disclosed in the present embodiment.
The hammer device certainly that hammer power is produced from using compressed air of the present embodiment, comprising:
Shell 1, shell 1 are formed with work department 106 and operation portion 107, are formed as installing chamber in work department 106;
It is integrated in the indoor cylinder block 6 of installation cavity, is formed as working chamber inside cylinder block 6;
It is formed in the compressed air channel of operation portion 107, hammering switch 703, hammering switch are installed on operation portion 107
703 connected state to switching pressurized air channel;
Working chamber one end is integrated with impact body component 2, the other end of working chamber is integrated with hammering piston component 3;
The gas chamber circumferentially distributed along cylinder block 6 is reserved between cylinder block 6 and shell 1;
Circumferentially fixed there are sealing rubber ring 601 in the middle part of cylinder block, sealing rubber ring in the middle part of cylinder block in the middle part of cylinder block 6 along its
Gas chamber is divided into hammering air plenum 101 and hammering piston return gas chamber 102 by 601;
Hammering air plenum 101 and compressed air channel communicatively receive the external compressed air conveyed;
It is formed with scavenging air valve gas chamber 104 between the front end and shell 1 of cylinder block 6, is embedded with and changes in the scavenging air valve gas chamber 104
Air valve piston component 4;
By changing the air pressure in scavenging air valve gas chamber 104, scavenging air valve piston component 4 can be slided along scavenging air valve gas chamber 104
To form gas before hammering piston close to cylinder block 6 and with the formation of cylinder block 6 sealing or far from cylinder block 6 and between cylinder block 6
Room 105;
There is the copper electricity for sequentially passing through impact body component 2, hammering piston component 3, scavenging air valve piston component 4 in cylinder block 6
Pole 5;
5 one end of copper electrode and impact body component 2 are connected and extend partially into 2 rear side of impact body component, copper electrode 5 it is another
End extends to the outside of shell 1;
One end that the copper electrode 5 is placed in outside shell 1 is formed as welding ends 501, the welding ends 501 and Awaiting Overhaul metal plate table
Face contact;
The part that copper electrode 5 is placed in 2 rear end of impact body component is connected with impact return spring 202.
Specifically, should more specifically be filled from hammer present embodiment discloses a kind of hammer device certainly for metal plate reparation
It sets and outside pulling capacity is generated repairing metal plate recess to metal plate under the premise of capable of or else destroying metal plate endothecium structure
It is multiple;It is using shell 1 as apparatus main body, and operation portion 107 therein holds as operator and uses, and the work of work department 106
Make intracavitary portion and is integrated with the function machines such as above-mentioned impact body component 2, hammering piston component 3, scavenging air valve piston component 4, copper electrode 5
Structure can form the fixed mode of spot welding for the welding ends 501 of copper electrode 5 with metal plate surface after being powered first with copper electrode 5
It is fixed with metal plate, followed by switching pressurized air to drive impact body component 2, hammering piston component 3 and ventilation valve piston group
The movement of part 4 is to drive 5 front-rear reciprocation movement of copper electrode, when copper electrode 5 rearward moves, pulling capacity is generated, due to passing through
The copper electrode 5 that electric welding is connected with metal plate surface can realize in the effect of pulling capacity and pull out the position of recess, generate and
Inside hammers identical effect, while copper electrode 5 can also be allowed to reset under the action of internal functional entity restoring force, is next
Secondary drawing is prepared.Maintenance mode is easy to operate compared to the prior art in this way, repairing effect is more preferable.
Preferably, cylinder block 6 is in hollow oval barrel structure in the present embodiment, and the outside of cylinder block 6 is circumferentially formed along it
There are two the annular grooves being recessed inwardly;
When cylinder block 6 and shell 1 assemble, the inside of annular groove and shell 1 is formed as hammering air plenum 101 and hammering is lived
Get back into a gas chamber 102;
Connection hammering 102 and of piston return gas chamber is offered in cylinder block 6 and at hammering piston return gas chamber 102
The bleeder port 602 of working chamber;
The working chamber of cylinder block 6 is formed as piston rear gas chamber 103.
This embodiment describes the structures of cylinder block 6, and what it is due to the present embodiment is the pressure by compressed air from device is hammered into shape
Each mechanism is mobile to generate pulling capacity inside power drive, therefore, it is necessary between cylinder block 6 and shell 1,6 inside of cylinder block it is pre-
Stay gas chamber, respectively above-mentioned hammering air plenum 101, hammering piston return gas chamber 102, piston rear gas chamber 103.Wherein, it hammers into shape
Hitting air plenum 101 and hammering the formation of piston return gas chamber 102 is mainly to be produced by the form construction design to cylinder block 6
Annular groove that is raw, being recessed inwardly along circumferential two circle of design of cylinder block 6, after cylinder block 6 is embedded in shell 1, cylinder block 6 and shell 1
Between will be formed as two circles pass through cylinder block in the middle part of the mutually isolated gas chamber of sealing rubber ring 601, as above-mentioned hammering air
Gas chamber 101 and hammering piston return gas chamber 102.In addition, the compressed air hammered in air plenum 101 is let out for follow-up work
It is depressed into piston rear gas chamber 103, in order to ensure the compressed air in piston rear gas chamber 103 is able to enter hammering piston return gas chamber
102 and impact force is formed to above-mentioned impact body component 2, piston rear gas chamber 103 and hammer can be connected to by devising in cylinder block 6
Hit the bleeder port 602 of piston return gas chamber 102.Hammering piston return gas chamber 102 is entered by bleeder port 602 in compressed air
In the process, compressed air can impact impact body component 2 to drive copper electrode 5 to move backward, and finally generate pulling capacity.
Preferably, impact body component 2 includes the impact body 201 for being embedded in 6 end of cylinder block, impact body 201 in the present embodiment
It is fixed with damping of shocks rubber ring 203 towards 6 inside one end of cylinder block, which is sheathed on copper electrode 5
It is external;
Copper electrode 5 is threadedly coupled with impact body 201;
Impact body 201 is fixed with impact return spring 202 towards 6 lateral ends of cylinder block, and impact return spring 202 is punching
Hitting body 201 provides copper electrode 5 mobile Reverse recovery power;
Impact body 201 and the contact surface of cylinder block 6 have cylinder back-end sealing cushion rubber 603.
Wherein, copper electrode 5 is placed in 2 rear side one end of impact body component and outside weldings positive pole is electrically connected;
After the source of welding current is powered, the welding ends of copper electrode 5 is connected by welding current and the spot welding of Awaiting Overhaul metal plate.
Need to guarantee the recessed position shape that copper electrode 5 can be to be repaired with metal plate firstly, recognizing in conjunction with above-described embodiment
The position of recess is pulled out to reach repairing effect at being connected, then under the action of pulling capacity.Accordingly, it is considered to arrive 5 He of copper electrode
The attachment on metal plate surface, the present embodiment is in such a way that spot-welded is fixed, and copper electrode 5 can be conductive well first,
Copper electrode 5 is electrically connected close to 2 one end of impact body component and outside weldings positive pole, once source of welding current switch is opened,
Electric current is transmitted by copper electrode 5, and the welding ends of copper electrode 5 will be fixed in a manner of spot welding with metal plate, so as to subsequent generation drawing
Recess can be pulled out when pull out force.
Preferably, it includes the hammering piston 301 inside cylinder block 6 that piston component 3 is hammered in the present embodiment, and hammering is lived
It fills in and offers hammering piston center hole at 301 axis, copper electrode 5 is arranged in the hammering piston center hole, hammering piston 301
The junction of hammering piston center hole and copper electrode 5 is equipped with piston center hole sealing rubber ring 302;
The junction of hammering piston 301 and cylinder block 6 is equipped with outside piston sealing rubber ring 303.
The present embodiment mainly describes the structure of hammering piston component 3 comprising can hammer into shape in axial sliding along cylinder block 6
Piston 301 is hit, the center of the hammering piston 301 is offered to pass the hammering piston center hole for setting copper electrode 5, it is contemplated that installation
Sealing problem afterwards is equipped with piston center hole sealing rubber ring 302, Yi Ji in the junction of copper electrode 5 and hammering piston 301
Above-mentioned outside piston sealing rubber ring 303.
Preferably, scavenging air valve piston component 4 includes the ventilation valve piston in scavenging air valve gas chamber 104 in the present embodiment
401, ventilation valve piston 401 can be slided along scavenging air valve gas chamber 104;There is ventilation valve piston at the axis of ventilation valve piston 401
Centre bore, copper electrode 5 are arranged in scavenging air valve piston center hole;
The both ends of ventilation valve piston 401 are respectively provided with scavenging air valve piston rear end sealed rubber ring 404 and scavenging air valve piston nose
Sealed rubber ring 403;
The junction of ventilation valve piston 401 and copper electrode 5 is equipped with scavenging air valve piston centre sealing rubber ring 405;
Scavenging air valve piston component 4 further includes the ventilation valve body 408 assembled with shell 1, and ventilation valve piston 401, which is assemblied in, to be changed
Ground forms scavenging air valve with ventilation valve body 408 in air valve body 408;
It takes a breath between valve piston 401 and ventilation valve body 408 through scavenging air valve outside piston cushion rubber 406 and ventilation valve body
Central seal circle 407 forms sealing;
Ventilation valve piston 401 has scavenging air valve piston pressure balancing spring 402 with copper electrode 5.
Preferably, compressed air channel includes the first gas circuit 701 and the second gas circuit 702, the first gas circuit 701 in the present embodiment
The other end open at one end in operation portion 107, the first gas circuit 701 extend to hammering air plenum 101 and with hammering air plenum
101 connections;
The opening that first gas circuit 701 is formed on operation portion 107 is connected to external compression air air feed equipment and to hammering
Compressed air is conveyed in air plenum 101;
Second gas circuit 702 is connected to by hammering switch embedded groove 704 with the first gas circuit 701, and the second gas circuit 702 and ventilation
Valve gas chamber 104 is connected to and conveys compressed air into scavenging air valve gas chamber 104.
Wherein, hammering switch 703 is in hammering switch embedded groove 704, and hammering switch 703 can be embedding along hammering switch
Enter the sliding of slot 704;When hammering switch 703 along hammering switch 704 slid inward of embedded groove, hammering switch 703 cuts off the second gas circuit
702 and first gas circuit 701 connection.
When work:
After assembly, the rear end of copper electrode 5 is formed as the connected relationship being threadedly coupled with impact body 201, can pass through punching
It hits body return spring 202 and realizes retraction.
Power switch is pressed first, and power supply exports welding current, drives welding ends 501 and the solid welding of metal plate point of copper electrode 5
Even;
Hammering switch 703 is pressed again, and hammering switch 703 can cut off the connected state of the first gas circuit 701 and the second gas circuit 702
State, due to the second gas circuit 702 be connected to scavenging air valve gas chamber 104, once the second gas circuit 702 of cutting and first gas circuit 701
Connected state, the pressure releasing that will lead in scavenging air valve gas chamber 104 fall, and the pressure only hammered in air plenum 101 is greater than
Pressure in scavenging air valve gas chamber 104 drives ventilation valve piston 401 to move forward, at this point, sticking on 6 end of cylinder block originally
Taking a breath valve piston 401 will be far from cylinder block 6, and the front end of cylinder block 6 is caused no longer to seal with ventilation valve piston 401, hammers
Compressed air in air plenum 101 enters gas chamber before the hammering piston formed due to ventilation valve piston 401 far from cylinder block 6
In 105, hammering piston 301 moves backward rapidly under gas pressure effect, it is mobile or in, hammering piston 301 will pass through gas
The bleeder port 602 of 6 rear end of cylinder body is reduced to the hollow air pressure of piston rear gas chamber 103 in hammering piston return gas chamber 102, and at the same time
Impact body rubber buffer ring 203 imparts power to impact body 201 by impact body rubber buffer ring 203, gives impact body
201 overcome the active force of 202 elastic force of impact body return spring, and copper electrode 5 is driven to move, and complete a drawing process;
Subsequently, as the gas of hammering air plenum 101 the inside largely enters compression before hammering piston in gas chamber 105
Air cannot be supplemented to initial pressure at once, and the pressure of scavenging air valve piston pressure balancing spring 402 is caused to be greater than hammering air gas
Pressure in room 101, driving ventilation valve piston 401 move backward, 6 forward end seal of cylinder block are got up again, subsequent compression
Air can only be supplemented in hammering air plenum 101, since ventilation valve piston 401 moves backward, open simultaneously ventilation valve body
408 venthole hammers the gas stored in piston return gas chamber 102 and enters piston by the bleeder port 602 of 6 rear end of cylinder block
In rear gas chamber 103, hammering piston 301 is driven to travel forward, the gas before hammering piston in gas chamber 105 passes through ventilation valve piston
401 venthole is released the gas into air by having already turned on the ventilation valve body 408 of venthole again, finally hammers piston
301 returns complete a drawing and carry out second of drawing preparation.
In the above-mentioned technical solutions, a kind of hammer device certainly being produced from hammer power using compressed air provided by the invention, tool
Have it is following the utility model has the advantages that
It is of the invention internal functional unit is played using gas interior compression air from hammer device push it is outside to generate
Pulling capacity, meanwhile, copper electrode 5 is welded and fixed in the way of spot welding with metal plate surface, and impact body component 2 and hammering are lived after spot welding
Plug assembly 3 drives the rearward drawing of copper electrode 5, to realize the design mesh that can repair metal plate depressed area from metal plate outer surface
's;
Of the invention is realized from hammer device using impact body return spring 202 and scavenging air valve piston pressure balancing spring 402
Copper electrode 5 after drawing, impact body 201 and the returning quickly for hammering piston 301 are provided convenience condition for pulling plate next time.
Of the invention can realize that metal plate layer structure is recessed from hammer apparatus structure novelty, without destroying metal plate endothecium structure
Concave portion position, and it is easy to operate, whole control utilizes electrode and compressed air collective effect, and repairing effect is good.
It is above that certain exemplary embodiments of the invention are only described by way of explanation, undoubtedly, for ability
The those of ordinary skill in domain without departing from the spirit and scope of the present invention can be with a variety of different modes to institute
The embodiment of description is modified.Therefore, above-mentioned attached drawing and description are regarded as illustrative in nature, and should not be construed as to the present invention
The limitation of claims.