US1576097A - Key-pulling tool - Google Patents

Description

March 9 1926.

M. c. DEIFENDERFER KEY PULL NG 'EGOL- 2 Sheets-Sheet 1 Filed Jan. 23

L L m A INVEN'TQR Mt/RV//V C. DE/FHVERFER.

March 9 1926.

M. C. DEIFENDERFER KEY PULLING TOOL Filed Jan.

25, 1925 2 sheets-sheet 2 ukwN ATTOR NEYS Patented Mar. 9, 1926.

UNITED STATES PArENr OFFICE;

MURVIN C. DEIFQENDERFER, OFBLUFFTON, OHIO, ASSIGNOR TO SCOTT & EW'ING COM- i IPANY, A PARTNERSHIP COMPOSED OF FRANK SCOTTAND E. EWING, BOTH OF BLUFFTON, oHIo.

KEY-PULLING TOOL.

Application filed January 23, 1925. Serial No. 4,173..

To all whom t may concern:

Be it known that I, MURVIN C( DEIFEN- DERFER, a citizen of the United States, re-A siding at Bluffton, in the county of Allen and State of Ohio, have invented lcertain new and useful Improvements in Key-Pulling Tools, of which the following is a specification, reference being had therein to the accompanying drawing. j y

My invention relates to key pullers.

It is the object 0f my invention -to provide a key puller which will grip the key with increasing force as the pull on the key is increased. y

It ,is a further object'of my invention to provide a key puller which is adjustable to `different-sizes of keys and which is adapted tohave different sizes and types fof key gripping surfacessubstituted in the master key 20 pulling` tool.

It is a further object of my invention to provide a tool which is adaptable for use on either a short shaft without the tool tilting or a long line shaft.

It is a further object of my invention to provide a tool having means for carrying the anti-tipping means of the tool when used with short shafts in a predetermined relationship with the rest of the tool despite 30 the movement Vof the tool with respect to the short shaft. j

It is a further obj ect to provide means for moving the key pulleras a whole with the key relative to the shaft, means for adjusting the initialgrip onthe key, and means for adjusting thev anti-tipping device associated with the key pulling tool. j

It is a further object of my invention to provide a very rigid and sturdy tool of 10 simple construction which, even though the parts may wear, will not effect its operation as it is so adjustable as to compensate for wear.

Referring to the drawings:

Figure 1 is a plan view of the tool with the anti-tipping device in position and a4 key in the clamping jaws of the tool;

Figure 2 is an end elevation of thetool from the key end;

Figure 3 is an end yelevation of the tool viewed from the end on which the screws are actuated;

device;

Figure 4 isa section through the tool showing the tool applied to a short shaft and in the process of extracting akey from said shaft;

Figure 5 is-a side elevation of the tool without. the anti-tipping device mounted on a long shaft such as a line shaft inthe proc-v ess ofextracting a key; y

Figure 6 is an end elevation from the actuating end with the shaft in section and the key in section showing the location-and position of the tool without the anti-tipping `Figure 7 is a section onthe line7-7 of Figure 1.; j Y

Figure 8 kis a section on the line 8 8 4of Figure 1; f

Figure 9 is a plan view of apair of the detachable clampingjaws showing a somewhat different form of jaws which are adaptable fory sucha tool. .y

Turningto the drawings and describing them in detail, 1 is a base 4block which carries the master actuating screw 2 which serves yto move the entire tool relative to the shaft, thus extracting the key from the shaft as the key travels withthe tool when suitably clamped Aas hereinafter' described. ,This shaft 2 is threaded in a threaded portion 3 on ythe base block 1. It turns freely in and is spaced from-the base block 1 due to the enlarged apertures l and 5 on either side of the threaded portion 3 of the base block 1. The actuating end of this screw is squared at its edges to receive a suitable handle or crank or other agency for rotating the screw 6. The other end of the screw is provided with a head 7 havingan annular kdepression 8. On this head is mounted ra cup-shaped member 9 having a roughened face 10 lfor engaging with the hub or other portion of a member mounted on the shaft` with the key. This cup-shaped. `detachable head is maintained in position on the head'7 of the screw by a set screw 11 which passes through the member 9 intothe annular groove 8 of the`head-7. 'j This base block is provided' on either `side with upwardly extending shoulders 12 which have spaced overhanging ledgesl 13.` Such spaced overhanging ledgesnor shouldersmay tion of the tool hasits outside faces 1T and 18 also tapering and converging` towards the face 16. The faces 15 with the converging over-hanging ledges 13 and shoulders 12 form converging guide ways for the sliding triangular shaped blocks 19 which carry the clamping aws 20. These blocks are provided with stems 21, the central axis of which is parallel with the outer diagonal face 22 of the block 19, which face rides against the tapering face 15 which guides it inwardly as the block proceeds outwardly. This stem 21 projects through a diagonally arranged aperture 23 formed in the head 24 which is mounted upon the base block 1. This head 24 is held in position by similar countersunk screws as those marked 14.

I prefer to make this head 24 integral with the overhanging shoulders and ledges so that a U-shaped member is thus formed which is mounted on the base block 1. This Ushaped member has shouldered arms 12which converge towards one another. j j

It will be obvious that the sliding blocks 19 will thusbe guided so that as they move inwardly and outwardly with their inner `faces 25 parallel to the ,major axis ofthe V tool, such faces 25 will be approaching such major axis and approaching one another. Thus the clamping jaws 2O which have the roughened surfaces .26 will be forced in tighter and tighter engagement with the key 2,7 as the jaws change their position relatively to the base block 1 `to the guiding shoulders 1.2. These jaws are held in position in the sliding blocks hy shoulders 28 tting in grooves 29 in the blocks. These blocks are detachable. Their sid-es rest upon the top of the base block. Various forms of these clampingjaws may be employed. A m'o'difiedform is shown in Figure 9.

ItV will thus be seen that the complete tool is a relatively simple one consisting of a base block, the unitary guiding shoulders, a head block U-shaped in general form, the sliding blocks, the clamping jaws,and the mainactuating screw. .j

In order to form a convenient method'of adjusting the sliding blocks and the clamping jaws to a key of pre-determined size in order to provide means of adjusting the jaws quickly to the key, I provide an adjusting screw 30. This screw has a squared head 31 upon which is detachably mounted asocket wrench 32 for adjusting the position of It carries on its inner end a grooved headV 34. On this grooved head is mounted a cup-shaped block carrying a set screw 36 which engages "with the inner ends of the clamping jaws 20. Thus it is possible to move the blocks and jaws relative to the key without moving the tool as a whole.

Incase a short shaft is being worked upon as in Figure 4, the shaft being designated 3S, I provide an antitipping device which :is detachable from the tool. `Thisfanti-tipping device consists of a slidiitg` anti-tipping block 39. It is guided in upwardly and laterally extending L-shaped guides 40 held in position by screws 41 on the head block 24.` This head block is provided with an aperture 42 through which is inserted` a sleeve 43 held in position in the block` by the set screw 44. This sleeve is internally spaced to carry the screw 45 which is thread ed in the carrier block 39 of which the` sleeve 43 is an integral part. This screw 45 has a squaredV head 461"L to receive the socket wrench `.52 and adjust it whileits other end is provided with a locating point 47 forengagement with the end of the shaft. This carrier Vblock 39 extends downwardly behind theanti-.tipping block andhase block in anarm 46 and terminates in an eye-which has an aperture 48 through which passesthe the main screw 2 freely. In order that this j carrier block and its mechanism may travel with the rest of the tool in predetermined relationship therewith so that as the Inovement of the tool takes place the anti-tipping device will be held infirm engagement with the end of the shaft 8S, a pairof collars 49 and 50 areprovided which are threaded up on the main screw 2. One of these collars serves to hold the arm 4,6 in this predetermined relationship, while the other collar acts as a locknut. l These eollarsare provided with apertures 51 to receive a wrench if that is desired.

The clamping jaws 20 `may `befurther fixed in position on the blocks bythe'use of screw 52.

In Figure 5, I designate the long shaft such as line shafting `and thehub with the pulley r54. j l j It will be noted fin. this figure and in Figure 6 the anti-tipping device"has been removed as that is not necessary andlwould be in the way when resting the tool upon a continuous piece of shafting of the character disclosed. j j C j j It will be understood that I desire to comprehend withinlmy invention such modifica# tions as may be necessary to adaptit to vary ing conditions of use. j j j I-Iaving thus fullydescribed my invention, what I claim as new and desire to secure by Letters Patent; is I j j 1. Ina key pulling-tool, "a haseblock, spaced converging guiding members, tapered sliding blocks `carried thereby, engaging jaws `carried by therespective blocks, and means carried by saidbaseblock such as a screw adapted to have one end actuated and the other end engaging an abutment adjacent the shaft in which the keyis located which is engaged between the jaws.

2. In a key pulling tool, a base block, spaced converging guiding members, tapered sliding blocks carried thereby, engaging jaws carried by the respective blocks, means carried by said base block such as a screw adapted to have one end actuated and the other end engaging an abutment adjacent the shaft in which the key is located which is engaged between the jaws, and a head block mounted on said base block, and screws carried on said sliding blocks traveling in apertures on said head block to cooperate in guiding said sliding blocks.

8. In a key pulling tool, a base block, spaced converging guiding members, tapered sliding blocks carried thereby, engaging jaws carried by the respect-ive blocks, means carried 'by said base block such as a screw adapted to'have `one end actuated and the other end engaging an abutmentadjacent the shaft in which the lkey is located which is engaged between the jaws, a head block mounted on said base block, screws carried on said sliding blocks traveling in apertures on said head blocky to cooperate in guiding said sliding blocks, an'dvmeans carried by said head block for adjustably positioning said sliding blocksfand jaws in engagement with the key.

4. In a key pulling, tool, a base block, spaced converging guiding members, tapered sliding blocks carried thereby, engaging jaws carriedby the respective. blocks, means carried by saidbase block such as a screw adapted tol have one end actuated and the other engagingan abutment adjacent the shaft in whichthe key is located which is engaged between the jaws, a headvblock mounted on said base block, screws carried on said sliding blocks traveling in apertures on said head block to cooperate in guiding said sliding blocks, means carried by said head block for adjustably positioning said sliding blocks and jaws in engagement with the key, said means consisting of a screw turning in said head block.

5. In a key pulling tool, a base block, a U-shaped supplementary block consisting of a transverse head block and arms having inwardly extending overhanging ledges and guiding surfaces converging towards one another` towards the outer ends of said arms, whereby a keystone space is formed between said block and arms, triangular shaped sliding blocks sliding on said inner surfaces of said arms beneath said ledges having parallel inner faces parallel with the major axis of the tool, clamping jaws carried on the respective parallel faces of the sliding blocks, guiding stems reciprocating in the head block carried by the sliding blocks, said stems being parallel with the converging faces of the arms, anda main actuating screw carried in the base block having one end adaptedto actuate the screw and the other endto engage with an abutment on the shaft in which the key is located.

6. In a key pulling tool, a base block, a U-shaped supplementary block consisting of a transverse head block and arms having in"- wardly Yextending overhanging ledges and guiding vsurfaces converging towards one another towards the outer ends of said arms, whereby a keystone space is formed between said block and arms, triangular shaped sliding blocks sliding on said inner surfaces of said arms beneath said ledges having parallel inner faces parallel with the major axis ofthe tool, clamping jaws carried on the respective parallel faces of the sliding blocks, guiding stems reciprocating inthe head block carried by the sliding blocks, said stems being parallel with the converging faces of the arms, and a main actuating screw carried in the base block having one end adapted to actuate the screw and the other end' to engage with an abutmentv on the shaft in which the key is located, and a second screw mounted in the head block having a hub adapted to engage with the clamp'- ing jaws to position the jaws in the sliding blocks in clamping engagement with the key.

7. In, a key pulling tool, a supporting means, jaw carrying means, key clamping jaws, said jaws and the carrying means being so arranged thatlas they'rnove in one directionthe faces will be maintained in parallel relationship and will draw together to engage a key, amaster actuating means for moving'V the block and jaws with akey relative to'a shaft, and. a? separate setting means for initially setting the jaws and blocks in clamping engagement with the key.

8. In a key pulling tool, abase block, a U-sha-ped supplementary block consisting of a transverse head block and arms having inwardly extending overhanging ledges and guiding surfaces converging towards one another towards the outer ends of said arms, whereby a keystone space is formed between said block and arms, triangular shaped sliding blocks sliding on said inner surfaces of said arms beneath said ledges having parallel inner faces parallel with the major axis of the tool, clamping jaws carried on the respective parallel faces of the sliding blocks, guiding stems reciprocating in the head block carried by vthe sliding blocks, said stems being parallel with the converging faces of the arms, and a main actuating screw carried in the base block having one end adapted to actuate the screw and the other end to engage with an abutment on the shaft in which the key is located, a second screw mounted in the head block having a hub adapted to engage with the clamping jaws t0 position the jaws in the sliding blocks in clamping engagement with the key, and means for preventing the tool 'from tipping relative to the shaft, means being provided to maintain said anti-tipping means inengagement with the shaft constantly in a predetermined relationship to assist thermovement of the tool with the key relative to the shaft. j

9. In a key pulling tool, a supporting means, jaw carrying means, key clamping jaws, said jaws and the carrying means being` so arranged that as they move in one direction the 'faces will be maintained in parallel relationship and will draw together to engagea key, a master actuating means for moving the block and jaws with a `key relative to aI shaft, and a separate` setting means for initially setting the jaws and blocks in clamping engagement with the key, and means for preventing the tool from tipping relative tothe shaft, means being provided to maintain said anti-tipping means in engagement with the shaft constantly in a predetermined relationship to assist the movement ott the tool with the key relative to the shaft.

10. In a tool, a base block, an actuating screw having a head on one end and an actuating head on the other, means carried on the block for engaging a key, means to force said key engaging means into engagement with the key with increasing force as the movement ot the block progresses, an anti tipping device consisting `of a transverse block, a depending arm, means on said main Vactuating screw to maintain the depending arm and block in engagement with the base block despite the movement of the screw, and a second screw carried by the anti-tipping block having `one end to actuate the screw and the other adaptedto engage with the end of a shaft.v

11. In a key pulling tool, a base block,

an actuating screw having a head on one end and an actuating'head on the other, means carried on the block for engaging a key, lneans'to force said key engaging means into engagementl with the key with increasing force as the movement of the block progresses, an anti-tipping device consisting of a transverse block, a depending arm, means on said main actuating screw to maintain the depending arm and block in engagement with thebase block despite rthe movement of the screw, a second screw carried bythe anti-tipping block having one end toactuate the screw and the other adapted to en gage with the end of a shaft, and means on said base block for guiding the anti-tipping block in sliding engagement therewith. 12. In a key pulling tool, a base block, an actuating screw having 4a head on one end andan actuating head on the other, means Carried on the block for engaging `a key, means to'force said key engaging means into engagement with the key with increasing force as the movement of the blockprogresses, an anti-tipping device consisting o t' a transverse block, a depending arm, means on said main actuating screw to maintain the'depending arm and block in engagementwith the base block despite the movement of the screw, a second screw carried by the anti-tipping block having one end t0 actuate the screw andthe other adapted to engage with the end of a shaft, and a third screw passing through said depending arm and carried by said base block having a head adapted to engage with said clamping j aws tomove them upwardly and inwardly with the sliding blocks in engagementwith the key. V, i i

`In `testimony whereof,V affix my signature. i

g MURvIN` CQ DEIFENDERFER.

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