US2772473A - Glass trimming tool - Google Patents

Description

INVENTOR.

JOSEPH A. PFANN N N A F P A w GLASS TRIMMING TOOL Filed Oct. 10, 1952 nitcd States Patent GLASS TRIMMJNG TOOL Joseph A. Pfann, Palo Alto, Calif.

Application October 10, 1952, Serial No. 314,113

3 Claims. (Cl. 29-458) This invention is a tool for uniting and separating glass and metal trimming channel thereof. Such glass and trim are prevalent assembly components in automotive vehicle bodies in various shapes for various purposes. The trim channel, being firmly bound on the edge of the window glass by compressing a rubber or a fiber sheet therebetween, frequently forms the locus of mechanical attachment for the purpose of operating the windows of doors and the wind deflectors, or draft controllers, of door windows besides forming weather seals. The trim channel also forms a safety adjunct in its tendency to prevent scattering of edge fragments of glass upon breakage.

The problem of separating broken laminated glass from and uniting new whole replacement glass with, the metal trim channel has presented considerable difficulty to workmen in reglassing automotive vehicle bodies. Several apparatuses have been provided with varying degrees of effectiveness to correspond. It is the principal object of this invention to provide a tool for these purposes which is more effective in facilitating such operations.

Other objects and advantages of my invention will be pointed out in the following specification wherein reference is made to the accompanying drawing, in which:

Fig. l is a central section through the tool shown in one position in the operation of separating trim from glass;

Figs. 2a, 2b, and 2c are sections taken through Fig. l on their centerlines therebelow;

Fig. 3 illustrates the action of the tool incident to applying the tool preliminary to the operation of Fig. l and preliminary to the operation of replacing glass as in Fig.5;

Fig. 4 illustrates by side elevation the position of the tool at the time of initiation of separation; and

Fig. 5 illustrates the initiating position of the tool for the operation of completing the union of the glass plate and the trim channel.

The tool provides a pair of grips for effecting a firm slipless tractive grip of the glassplate with the tool and for forming thereon and therewith a rigid base for desired.

The grips include a pair of friction devices, each formed of a rigid metal channel base 14 provided with a rubber grip pad 16 cemented thereto, with the friction devices arranged to be supported by, or to engage registering opposite surface areas of, the glass plate 10, the glass engaging areas of the pads 16 being flat for engaging fiat surfaced glass as shown. Each channel base 14 has pivoted thereto by a pin 18 one of two preferably identical rigid metal thrusting way channels 20 and 22 constituting likewise grip force transmitting members and lever fulcrum supports for each other and for cam rollers.

The thrusting way channels 20 and 22 are pivotally 2,7 7 2,47 3 Patented Dec. 4, 1956 linked, hinged, or fulcrumed on each other and together between their ends by offset arms 24 and 26 which are rigidly attached to the channel 22 on the outsides of the walls thereof and which arms extend perpendicularly from channel 22 in extension of and from the channel opening so as to embrace the other channel 20 as shown in Fig. 2b to which the offset arm 24 and 26 are pivotally attached at the corresponding longitudinal region of the side walls of channel 20 by pivot pins 25 and 27 leaving the channel way 3t) of channel 20 clear of the inner ends of pins 25 and 27. The channels 20 and 22 as thus assembled present between them a limited passage of variable, but having a minimum, cross section for the passage therebetween and along of the pushing and pulling mechanism.

At the ends of the trusting way channels 20 and 22 away from the grip devices 14 the channels have rotatably mounted therewithin across the channels thereof grip force transmitting cam rollers 32 and 34.

The bridge portions 36 and 38 of the cross sections of channels 29 and 22 present internal fiat opposed nearly parallel slide surfaces and the side walls of the channels present laterally thereof substantially parallel coplanar slide surfaces which several flat surfaces. together present a restrictive slide guideway for the pushing and pulling mechanism assembly which is contained and supported between and guided by the channel guideways.

The movable pushing and pulling assembly comprises a straight threaded shank 40 for insertion, reciprocation and turning on its own axis midway between the thrusting way channels 20 and 22. The threaded shank 40 is preferably formed of a rigid metal rod integral with an externally disposed crank portion 42 of the rod. The gripping assembly comprises the channels 20 and 22 in such assembled girth that it may be grasped therearound in one mans hand, as the left hand, in the region of pivoting, that is with some fingers on both sides of pivots 25, whereby the two channels may, when otherwise free to rotate on the pivots, be caused to rotate relatively between an open position as seen in Fig. 3 and the closed positions of the other figures by merely shifting, and exerting pressure with, the properly related fingers of one (left) hand while the crank handle 42 is held in the other (right) hand and by means of which crank handle 42 the pushing and pulling assembly is manipulated while applyin the tool to the glass 10 and. to the trim 12 attached thereto.

A pulling grip clamping cam nut 44- of the traveling nut type is threaded on the shank 40 in the vicinity of the crank end of the shank and a pushing grip clamping cam nut 46 of the traveling nut type is threaded on the shank 4G in the vicinity of the other end of the shank.

The grip clamping cam nuts 44 and 46 have flat side surfaces 48 and 50 which adjoin and abut the inside wall surfaces of the channels 20 and 22 thus preventing their rotation about the shank and assisting the containment of the pushing and pulling assembly within the gripping assembly components while allowing sliding therein. The free end of shank 40 is turned down to provide a cylindrical swivel pivot 52 on the shank axis which pivot part is terminated by a suitable threading for a nut 54. Lodged in pivotal relation on the pivot 52 and against nut 54 is a bearing washer 56 which preferably has a cylindrical arcuate bearing surface 58 disposed toward the shank 40. Swivelly mounted on the surface 58 and pivot 52 are two trim engaging members 60 and 62, which members are alike and formed of flat bars of a width to fit between the walls of channels 20 and 22 as shown in Fig. 2b. Each trim engaging member 60 and 62 is provided with a bearing hole for receiving pin 52 and is provided with a cylindrical external and concentric internal curved surface, on an axis through the centerline of the hole ex- 12 is illustrated in Fig. 3.

tended and perpendicularly to the length direction of the bar, so as to nest on the bearing washer 56 as shown. A couple of flat bearing washers engage the outer surface of the outer trim engaging members as shown. These members have a relatively loose pivotal relationship and are therefore free to rotate on one another. The trim engaging members are bent as shown to form convergent shank portions 64 terminated by hooks 66 which hooks are disposed toward and to engage each other. The two trim engaging members are disposed on opposite sides of the axis of shank 49 and their total spread across the axis is at all points substantially less than the distances between the channel bottoms 36 and 38 at all relative positions of the pulling and pushing assembly within the gripping assembly.

To the shanks 64 of the trim engaging members there are fastened fixed ends of leaf springs 68 which engage the channel bridges 36 and 38 in a manner to bias the hooks 66 to each other in grapple fashion.

It will be observed that the two assemblies which are the gripping assembly and the pushing and pulling assembly are slidable relatively to each other in a reciprocative manner for the purpose among others of applying and releasing the tool from the glass and the trim. Because of the compact design of the tool it is often made of small overall dimensions in which form it can be applied for releasing and replacing small glasses without disinounting the glass trim from the vehicle frame.

initial application of the tool to a glass it and trim In this figure the pushing and pulling assembly has been retracted leftward in the gripping assembly so that cam rollers 32 and 34- have dropped in ahead of the pulling cam nut 44 thus having allowed the channels to be pivoted relatively at 25 to open the free space between gripping devices 14 and to allow expansion for separation of hooks 66 as shown. The two channels 20 and 22 are held so with the left hand exerting pressure thereon at 21-21 between pivots 25 and rollers 32 while the tool is pushed over the trim 12. As the hooks 66 engage the trim 12 their forward curved noses 67 are deflected by the trim 12 against the action of springs 68 to allow passage of the hooks to Figs. 3 and 4 positions. After reaching the Fig. 4 position the devices 14 are pressed together by shifting the pressure of the fingers of the hand on the channels to points as 23 23 on the opposite side of pivots 25 in Fig. 4, thus lightly gripping the glass 10 and bringing the rollers 32 and 34 out of the way of nut Thereupon the pushing and pulling assembly is pushed into the channel passage to cause the cam surfaces 43 of nut 44 to engage rollers 32 and 34 which action exerts a very substantial gripping force on and by grip devices 14 and relieves need for the hand grip action, and which action further results in resisting further relative inward movement of nut The hooks 66 are now somewhat rightward of the trim channel 12 resting on the glass in a position rightward of that of Fig. 4. The crank 42 is now turned in the pulling direction which causes the hooks 66 to slide toward and into their Fig. 4 position whereupon they engage the trim. Upon such engagement the shank 40 is placed in tension between the hooks and the nut 44. Nut 46 in attempting to respond to the tension transmits further lateral force to rollers 32 and 34 thus increasing the gripping action of devices 14 on glass i The devices 14- therefore continue to remain stationary on the glass and the trim is drawn off by the hooks as shown in Fig. l. The greater the resistance is to separation, the greater is the gripping action of pads 16 on the glass it). immediately there is no resistance to the pulling action the pressure on the pads 16 is relieved. The devices 14 remain stationary on the glass 10 as long as there is need for force to pull on trim 12.

I In employing the tool. to press a trim channel onto glass It) as in Fig. the tool is provided, in addition to the pushing grip clamping nut 46, with a pusher boot '70 of U-shape and of rigid metal which engages over the noses of both hooks 66 and forms therewith a thrusting boot. By making members and 62 of ferrous metal and boot of permanently magnetized metal, the assembly and disassembly of 70 to and from the shown position of Fig. 5 is facilitated.

In the assembling of trim 12 and glass 10 the trim, with a rubber or fiber sheet liner 13, is first hand-pressed a little onto or otherwise registered with the edge of the glass as in Fig. 5. The tool is then assembled to the glass with the friction devices 14 as in Fig. 3 and the boot 70 as in Fig. 5. Now the thrusting assembly is drawn outwardly of the gripping channel passageway so that pushing grip cam nut 46 engages its cam surfaces 47 with rollers 32 and 34. The entire tool is then pushed onto the glass until boot 7t) abuts the trim 12 and thereafter the friction devices 14 are forced to the glass by hand. Crank 42 is now turned in the pushing direction causing nut 46 to expand rollers 32 and 34 and form a slipless grip by devices 14 on the glass whereupon boot 70 engages trim 12 and moves trim 12 onto the glass. When the glass abuts the bottom of the trim channel there can be no further motion and the resistance to movement of the crank is indicative of this condition.

I claim:

1. A forcing tool comprising a pair of channels, the open sides of which form ways, said channels being placed with their ways opposed and longitudinally coextensive, two adjacent ends of said channels being grip ends and the other two ends being formed as cam follower ends, means positioned intermediate the ends of and pivotally connecting said channels in laterally spaced relationship, each channel having adjacent its grip end a grip pad pivotally secured thereto so that a face of each pad is opposed to a face of the other, a work-engaging head positioned between and guided by said ways for movement longitudinally thereof while being restrained by said ways from rotation, a screw positioned longitudinally between said ways with one end secured to and swiveled in said head and the other end extending between and outwardly beyond said cam follower ends, and nut means having cam surfaces for engagement with said cam follower ends and restrained from rotation relative to said channels while said surfaces are so engaged, said nut means being threadedly carried by said screw to be moved axially along said screw upon rotation thereof so that said cam surfaces engage and move outwardly said cam follower ends thereby forcing said pads together to grip the work positioned therebetween, and said head and screw being slideable as a unit longitudinally of said ways to permit said head to apply a force to the work while the work is gripped by said pads.

2. A forcing tool as recited in claim 1 wherein said head comprises a pair of separable hooks with opposed points, and resilient means secured to each hook between each hook and adjacent way, said resilient means urging said hooks together.

3. A tool for forcing glass trim comprising a pair of glass engaging and clamping channels, the open sides of which form ways, said channels being placed with their ways opposed and longitudinally coextensive, two adjacent ends of said channels being grip ends and the other two ends being formed as cam follower ends, means positioned intermediate the ends of and pivotally connecting said channels in interally spaced relationship, each channel having adjacent its grip end a grip pad pivotally secured thereto so that a face of each pad is opposed to a face of the other, a work-engaging head positioned between and guided by said ways for movement longitudinally thereof while being restrained by said ways from rotation, a screw positioned longitudinally between said ways with one end secured to and swiveled in said head and the other end extending between and outwardly beyond said cam follower ends, and nut means having cam surfaces for engagement with said cam follower ends and 5 restrained from rotation relative to said channels while said surfaces are so engaged, said nut means being threadedly carried by said screw to be moved axially along said screw upon rotation thereof so that said cam surfaces engage and move outwardly said cam follower ends thereby 5 forcing said pads together to grip the glass positioned therebetween, and said head and screw being slideable as a unit longitudinally of said ways to permit said head to apply a force to the trim while the glass is gripped by said pads. 10

References Cited in the file of this patent UNITED STATES PATENTS 1,231,254 Hancock June 26, 1917 15 Klay Dec. 25, 1923 Neill Feb. 5, 1924 Corkum June 12, 1928 Hall Apr. 17, 1934 Roberts Dec. 22, 1942 Smith Apr. 2, 1946 FOREIGN PATENTS Germany Feb. 12, 1926

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