US1474159A - Pin puller - Google Patents

Description

Nov. 13 1923. B94749115@ H. vv. MORROW PIN FULLER Filed Jan. 1'7, 1923 2 Sheets-Sheet 2 INVENTOR y HIS ATToNEv Patented Nov. i3, i923.

@ATWT HOWARD W. MOR-ROW, OF PHLLIPSBURG, NEW' JERSEY, ASSIGNOB/ T0 INGERSOLL- RAND COMPANY, 0E JERSEY CTY,

NEVI JERSEY, A CORPGRATION OF NEVJ JERSEY.

PIN FULLER.

Application filed January 17, 1923. Serial No. 613,086.

T 0 @ZZ who/m. t may concern.'

Be it known that l, Howiinn W. Monnow, citizen ot the UnitedStates, and a resident of Fhillipsburg, in the county of Warren and State of New Jersey, have invented a certain Pin Puller, of which the following is a specification accompanied by drawings.

This invention relates to pin pullers and particularly to a levice of this character adapted to operate in conjunction with a drill sharpening` machine to withdraw the pin from a hot drill steel, usually inserted into the bore ot the steell to maintain the bore at its proper diameter.

Pin pullers of various types are at present used for performing the operation of re4 moving` the pin from the bore of the steel, which operation usually requires considerable torce because the pinV becomes tightly wedged in the hole. Such ain pullers have been provided either as separate machines or as an adjunct to the drill sharpening` machine proper, operated independently, either by hand or foot power, or by separate mechanical means.

The primary object of this invention is to enable a pin puller to be conveniently mounted on or built in the stationary portion or a drill steel sharpening machine and operatively connected to a movable member oit the drill sharpener so that the pinpuller is operated by said movable member of the drill Sharpener, instead of by separate or independent manual means. A further object is to simplify and improve the operating mechanism of the pin puller and to permit the saine to be automatically locked in inoperative position when not in use, manually operated means adapted to function. independently or" the movable jaw of the drill Sharpener being provided for releasing the operating mechanism when it is desired to use the pin puller.

A still further object is to operate the pin puller by simple and rugged mechanism employing a rack and pinion to edect relative movement of the drill steel and the pin to be removed or withdrawn therefrom. Further objects of the invention will later appear and to ill these ends the invention consists of.

the combination of elements and arrangement of parts substantially as hereinafter fully described in the following specification and illustrated in the accompanying drawing', in which- Figure l is a side elevation partly in section along' the line 1-l of Figure 2 looking in the direction ot' the'arrows showing a portion of a drill Sharpener having the pin puller operatively mounted thereon preparatory to pulling a pin from a drill steel;

F igure 2 is a top plan view of the pin puller;

Figure 3 is a side elevation partly broken away of the pin puller showing the device in the act of completing the pin pulling operation, and

Figure 4 is a horizontal sectional view taken on the line i-l of Figure l lookin" in the direction of the arrows.

Referring to the drawings, the base or cylinder A of a drill sharpener has a movable jaw member or crosshead B carried by the plunger rod C which is adapted to be actuated bv a piston (not shown) operating in the base or cylinder.

The pin puller shown in this instance comprises the frame D, which may be secured at the side M1 Lbe base A in any suitabh` manner, as `by the bolts E. The frame D preferably includes an outer section F. a central vfiller section il? and an inner section H which rests against the base A. A bracket member J is interposed between the sections F and ti at the upper portion ot the frame and another bracket K locatet at the bottom of the frame D. These brackets l and la may be formed intee'rallv with the opposinn' :trame sections F and G or may be secured between the sections in any suitable manner. The bracket J acts as a support for a stationary member shown in the form of an abutment L forming a work support against which a drill steel O is adapted to rest. This abutment mav be provided with a recess P tor receiving the end of M drill steel O, and also with a groove Q adapted to receive the pin R which has been driven into the end of the steel to maintain the diameter oi the central lbore .S and which pin R is to be removed. The stationary abutment L may be urovided with lugs T a' ilLs sides adapted to register with similar lugs U formed on the sides of the sections F and loo VGr so that bolts V may pass through these lugs to rigidly secure the stationary abute.

end of tlie rack lilladjacent to the stationary t abutment L. rThe abutment a as sliownlhas a groove b aligned with the groove L); of the stationary abutment L and both of the grooves Z) and are adapted to be alignedwith the central bore S of the drill steel O, so that the two abutments a and L.v the one movable with the rack and the other im movable, maybe interposed between the end of the drill steel and the head c of the pin R, the pin R resting in the grooves i) and Q.

Suitable operative devices, shown in this instance as raclr and pinion mechanism operated by the crosshead, are provided for causing relative movement between the stationary and movable abutments to effect removal of the pin fromthe steel. The rac-ltv and pinion nieclianismrincludes preferably a vertically reciprocable actuating raclr l having .teeth c and longitudinal ribs j' on its opposite sides, the ribs f being adapted to traverse guiding grooves q in the opposing faces of the sections G and H. The teeth e ofits circumference and a non-toothed portion t is rigidly secured on the squared portion g of the shaft 0. The teeth s of the ear r' are adapted to mesh with the teeth of the pin puller rack W, and as the gear ris fast to the pinion 7i, which in turn meshes with the teeth c of the vertically reciprocable actuating raclr d, the pin puller rack W. carrying the movable abutment. a. will be moved back and forth in accordance with the reciprocatory movements of the actuating rack d. A bearing member u secured on themovable crosshead B of the drill sharpkener by bolts o is adapted to engage the top uref the actuating` rack (l as shown in Figure l,v and will move the rack downward asv the crolsshead B is lowered toA the position shown inV Figure 3.

Resilient means are preferably provided for effecting movement of the actuating rack cl in the opposite direction. These means may include a coiled spring m which is adapted to be secured between the pro- 'iecting top portion y of the rack Z and the bracket K which is rigidly located at the base of the guides g, and this spring :c is compressed with each downward movement of the crosshead when the pin puller is in operation. Y v

The spring m is provided with suitable guiding meansV to maintain its alignment and prevent buckling. n this instance the spring'surrounds and is guided'by a plunger a which is screwed into the projecting portion y, as shown at l, and a cylinder 2 of substantially the same diameter as the plunger a, screwed into or otherwise suitably fixed to the bracket K, as shown' at The plunger e has a smaller Vdiameter portion il which is supported and guided in the cylinder '2, and the cylinder 2 is preferably provided with an aperture 5 at one end to' maintain atmospheric pressure within the cylinder 2, thus preventing the bui-lding up of air cushions which would tend to impede movement of the plunger e, and hence the rack d. Y

Then the crosshead has been lowered and the pin puller rack moved to the position indicated in Figure 3, the gear r will be automatically caught and held against return movement by securing means which may include a pallet or catch 6, secured to a handle and pivoted between the frame sections F and Gr as shown at 8, so that the weight' of the handle normally causes the pallet 6 to bear against the non-toothed surface 2f of the gear 7 until the gear r reaches a'point where the pallet 6 enters the notch 9 adjacent to the last tooth l() which will be when the crosshead B `has practically descended to the limit of its movement. The pin pulling apparatus is thus heldin inoperative position against the force of the spring m with the movable pin engaging means a retracted so that the drill sharpening. machine may be freely used for other operations without actuating the pin puller. Vhen it is desired to restore the pin puller to operation, the handle 7 is manually raised slightly, turning the pallet 6 on itspaXis 8 so that the pallet leaves the tooth 110. whereupon the gear r will be released and the spring will cause the vertically reciprocable actuating rack d to rise. This reverse movement of the actuating rack CZ results in corresponding reverse movement of the piniony 7L, gear r, pin puller rack VJ and movable abutment a, and the rising movement of the rack d continues until the abutment a assumes its initial position against the stationary abutment L. Obviously, the crosshead B and handle 7 may be raised to permit the pin puller to return to initial position after a pin has been pulled from a steel so that the pin will be carried to the front of the machine Where it may be more easily removed from the grooves 7) and Q., after which the pin puller will be locked in'its inoperative position by a sncceeding descending movement orp the crosshead.

The diameter of the gear r is preferably greater than that of the pinion t in order to transmit motion which will result in the pin puller rack W obtaining a greater length of travel than the distance traveled by the crosshead B. This is necessary because in practical use the pins O are generally of considerable length while the distance of movement of the crosshead B in actual prac` tice is comparatively small. In the present instance, the diameter of the gear 7' is substantially twice that of the pinion 71. which enables the rack W to move substantially twice the distance traveled by the cross head B in its raising and lowering movement.

I claim:

l. A pin puller adapted to be associated with a drill sharpening machine having a movable crosshead, said pin puller comprising a stationary member and movable pin engaging means, both adapted to be interposed between the end of a drill steel and the end of a pin inserted in said steel and means for eliecting relative movement of said elements to cause the removal of the pin from said steel. said last mentioned means being actuated by movement of the movable crosshead of the sharpening machine, and means independent of the crosshead for retaining said crosshead actuated means in inoperative position.

2. A pin puller adapted to be associated with a drill sharpening machine having a movable crosshead, said pin puller comprising a stationary member and movable pin engaging means, both adapted to be interposed between the end of a drill steel and the end of a pin inserted in said steel, and means for eecting relative movement of said element-s to cause the removal of the pin from said steel, said last mentioned means being actuated by movement of the movable crosshead of the sharpening machine., means independent of the crosshead tor retaining said crosshead actuated means in inoperative position, and means for causing said crosshead actuated means to return to initial position.

3. A pin puller adapted to be associated with Va drill sharpening machine having a movable crosshead, said pin puller including a stationary member and movable pin engaging means adapted to be interposed between the end of a drill steel and the end of a pin inserted in said steel, a pin puller rack and a pinion adapted to eect Inovement of said pin engaging means to cause the removal of the pin from said steel, said pin puller rack and pinion being actuated by movement of the movable crosshead of; the drill sharpening machine, and means for retaining said pin puller rack and pinion in inoperative position.

4. A pin puller adapted to be associated with a drill sharpening machine having a movable crosshead, said pin puller comprising a plurality of members adapted to be interposed between the end of a drill steel and the end of a pin inserted in said steel. a pin puller rack and pinion adapted tro effect relative movement of said members to cause the removal of the pin from said steel., said pin puller rack and pinion being actuated by movement of the movable crosshead of the sharpening machine, means for retaining the movable element in its withdrawn position, and means for causing said movable element to return to initial position.

- 5. A pin puller adapted to be associated with a drill sharpening machine having a vertically movable crosshead. said pin puller comprising a stationary member and movable pin engaging means adapted to be interposed between the end of a drill steel and the end of a pin inserted in said steel, rack and pinion mechanism actuated by said crosshead for moving said pin engaging means to cause the removal oi the pin from the steel, automatic means Jfor retaining said pin engaging means in the moved position, and manually released means for returning said pin engaging means to its initial position.

6. In a pin puller for pulling a pin from an object, a stationary base7 a movable crosshead, a stationary abutment against which the object is adapted to rest and a movable abutment adapted to engage the head of the pin, said abutments being mounted on said stationary base. rack and pinion mechanism actuated by the crosshead for moving the movable abutment away from the stationary abutment to cause removal of the pin from the object. and means independent of the crosshead adapted to retain said raclr and pinion mechanism in inoperative position.

7. In a pin puller 'for pulling a pin from an object, a stationary base, a .movable crosshead, a stationary abutment against which the object is adapted to rest and a movable abutment adapted to engage the head of the pin, saidl abutments being mounted on said stationary base, rack and pinion mechanism actuated by the crosshead for moving the movable abutment away from the stationary abutment7 means independent of the crosshead adapted to retain said rack and pinion mechanism in inoperative position and means for restoring said rack and pinion mechanism to operative position.

8. iIn a pin puller for pulling a pin from an object, a stationary base, a vertically movable crosshead, a stationary abutment against which. the object is adapted to rest and a horizontally movable abutment adapted to engage the head ot the pin, said abutments being mounted on said stationary base, rack and pinion mechanism actuated by the crosshead tor moving the movable abutment away trom the stationary abutment, and means adapted to retain said rack and pinion'mechanism in inoperative posiV tion and to cause the same to returnl to operative position.

9. A pin puller adaptable for association with a drill sharpening` machine having a stationary base and a movable crosshead, said pin puller including` a stationary mein ber and movable pin engaging means both adapted to be interposed between the end of a drill steel and the end of a pin to be removed from said steel. rack and pinion mechanism actuated by the crosshead tor etlecting movement otsaid pin engaging means to cause the removal ot the pin trom the steel, and automatic means independent of the crosshead for renderingl said rack and pinion mechanism inoperative.

l0. A pin puller adaptable for association with a drill sharpening machine having a stationary base and a removable crosshead7 said pin puller including a stationary member and movable pin engaging means, both adapted to be interposed between the end ota drill steel and the end of a pin to beV removed from said steel, rack 'and pinion mechanism actuated by the crosshead tor effecting movement of said pin engaging means to cause the removal ot the pin trom t-he steel, automatic means independent of the crosshead for rendering said raclr and pinion mechanism inoperative, and non-automatically actuated means for permitting said rackand pinion mechanism to return to operative position.

l1. A pin puller adapted to be mounted at the side of a drill sharpening machine having av stationary base and a vertically movable crosshead. said pin puller com prising a stationary member and horizontally movable pin engaging means,. bot-h adapted to be interposed between the end ot a drill steel and the end ot' a pin to be removed trom said steel, rack and pinion mechanism actuated by the crosshead tor effectingmovement ot said pin engaging means to cause the removal oit the pin from the steel, and automatic means independent of the crosshead 'for retaining said pin engaging means in inoperative position.

12. A pin puller adapted to be mounted at the side of a drill sharpening machine having a stationary base and a vertically movable crosshead', said pin puller comprising a stationary member and horizontally movable pin engaging means both adapted to be interposed between the end of a drill steel and the end oi a pinto be removed from said steel, rack and pinion mechanism actuated by the crosshead for eiiecting movement ot said pin engaging means to canse the removal of the pin 'tron the steel, automatic means independent of the crosshead for retai ing said pin.engen1- ing means in inoperative position and manually released means'tor permitting said pin engaging means to retnrn to oaerative position. i

13. A pin puller adapted to be mounted at the side ota drill sharpening machine having a stationary base and a movable crosshead, said pin puller comprising a stationary member and movable pin engaging means,A both adapted to be interposed between the Vend ot a drill steel and the end of a pin to be removed trom said steel, rack and pinion mechanism actuated by the crosshead for etieeting movement ont' said pin engaging means to cause removal et the pin :trom the steel, automatic means independent et the crosshead tor retaining said pin eng ging meansV in the moved position released spring and `manually actuated means tor causing said movable pin engaging means to return to operative position.

14.' A pin puller for pulling a pin from an object comprising a stationary base, a movable crosshead, a stationary abutment gainst which the object is adapted to rest, and movable pin engaging means adapted to engage the head of the pin7V said 1pin engaging means being mounted onv a reciprocable pin puller rack, a mutilated gear adapted to engage the teeth of said pin puller rack, a pinion fast to said gear, a reciprocable actuating raclr adapted to actuate said pinion, bearing means on the movable crosshead adapted to engage and depress said reciprocabl@ actuating raclr when the crosshead is lowered, causing movement of said pin engaging means away from the stationary abutment automatic means adapted to retain saidpin engaging means in inoperativel position and non-automatic means for releasing said automatic means to cause the pin engaging means to be returned to its initial operativ@J position when the movable crosshead is raised.

l5. A pin puller adaptable for association with a drill sharpening machine having a stationary base and a vertically movable crosshead, said pin puller comprising a stationary abutment against which the object is adapted to rest, and movable, pin engaging means adapted to engage, the head of the pin. said movable pin engaging means being mounted-on a horizontally reciprocable toothed pin puller rack adapted to actuate said pinion, resilient means tending to maintain the reciprocable actuating rack loo in its uppermost position, bearing means on the iovable crosshead adapted to engage and depress the reciprocable actuating rack when the crosshead is lowered, causing movement oi' the pin engaging means aWay from the stationary abutment, a pallet adapted to engage a tooth oi the mutilated gear to retain said pin engaging means in inoperative position against said spring and means for releasing said pallet to permit the spring to effect the return of the movable pin engaging means to initial operativey position Tvhen the movable crosshead is raised.

16. A pin puller for a drill sharpener having a stationary base and a movable crosshead, said pin puller comprising means for holding the drilled steel, means for operatively engaging the pin, and rack and pinion mechanism actuated by the crosshead for eecting movement of said pin engaging means relative to the steel to Withdraw the pin from the steel.

17. A pin puller for a drill Sharpener having a stationary base and a movable crosshead, said pin puller comprising means for holding the drill steel, means for operatively engaging the pin, rack and pinion mechanism actuated by the crosshead for eifecting movement of said pin engaging means relative to the steel to Withdraw the pin from the steel, and means adapted to retain said pin puller in inoperative position.

18. A pin puller for a drill Sharpener having a stationary base and a movable crosshead, said pin puller comprising means for holding the drill steel, means for operatively engaging the pin, rack and pinion mechanism operated by the crosshead i'or eiiecting relative movement or said pin engaging means to withdraw the pin from the steel, means adapted to retain said pin engaging means in inoperative position, and means ior restoring. said pin engaging means to opera-.ive position.

19. A. pin puller for a drill Sharpener having a stationary base and a movable crossliea-d, said pin puller comprising means for holding the drill steel, means for operatively engaging the pin, rack and pinion mechanism operated by the crosshead for eii'ecting movement of said pin engaging means relative to the steel to Withdraw the pin from the steel, and automatic means adapted to retain said pin engaging means in inoperative position.

20. A. pin puller for a drill Sharpener having a stationary base and a movable crosshead, said pin puller comprising means for holding the drill steel, means for operatively engaging the pin, rack and pinion mechanism operated by the crosshead for eiecting movement of said pin engaging means relative to the steel to Withdraw the pin from the steel, automatic means adapted to retain said pin engaging means in inoperative position, and manually released means for restoring said pin engaging means to operative position.

In testimony whereof I have signed this specification.

HOWARD WV. MORROW.

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