US1222173A

US1222173A - Cotter-pin extractor.

Info

Publication number: US1222173A
Application number: US12093616A
Authority: US
Inventors: John A Anderson
Original assignee: ORVILLE MORTON
Current assignee: ORVILLE MORTON
Priority date: 1916-09-19
Filing date: 1916-09-19
Publication date: 1917-04-10
Anticipated expiration: 1934-04-10

Description

I. A. ANDERSON. y CUTTER PIN EXTRACTOR. APPLICATION FILED SEPT. I9, I9I6.

Patented Apr. 10, 1917.

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JOHN A. ANDERSON, OF BRIDGEPORT, CONNECTCUT, ASSIGNOR OF ONE-HALF T0 ORVILLE MORTON, OF BRIDGEPORT, CGNNECTIECUT.

CO'ITER-PIN EXTRACTOR.

mmm-"mamma Specicaton of Letters Patent.

Patented Apr. iii, i917.

To all whom t may concern.

Be it known that I, JOHN A. ANDERSON, a citizen of the United States, residing at Bridgeport, in the county of Fairfield and State of Connecticut, have inventedy certain new and useful lmprorements in Cotter- Pin Extractors, of which the following is a specification.

The invention relates to new and useful improvements in extracting tools designed for withdrawing cotter pins 'from bolts, shafts, and the like, and which will serve to straighten the shanks of such pins as they are withdrawn so that they may again be used without necessitating any special operation for straightening the shanks in order to permit their reinsertion in the opening of the bolt or shaft from which they may have been withdrawn.

The object of the invention is to provide a tool which may be readily attached to the head or eye of a cotter pin, and having sufficient longitudinal extracting movement to adapt the tool to various sizes of pins now commonly in use, the operation and arrangement being such that the first movement of the handle members will serve to lock the tool to the pin, and then cause the extraction of the pin from its confining opening.

The invention consists in certain peculiar details of construction, combination, and arrangement of parts as will be hereinafter fully described and then claimed.

ln the drawings illustrating the invention, in the several gures of which like parts are similarly designated, Figure l is a. plan view of the tool in its open position. Fig. 2 is a sectional plan view of the same. Fig. 3 is a sectional plan view of the tool illustrating it in its closed position, this is to say, the position occupied by the handles as when extracting a pin. Fig. 4 is a transverse section drawn on the line 4-4 0f Fig. 2.

1 designates the head of the tool having a longitudinal opening or channel 2, (rectangular in cross section), extending entirely through the same, and having parallel side walls as shown in Figs. 2 3, and 4. Slidably retained within the opening or channel 2 are arms 3 having their outer ends terminating in substantially semicircular gripping jaws 4, designed to encircle the eye of a cotter pin as will be hereinafter further explained. IThe arms 3 are pivoted together adjacent to their inner ends upon a pin 5, which pin 5 also serves to pivotally connect the arms 3 to the inner ends of links 6, the latter having their outer ends pivoted at 7, to operating handles 8, the inner ends of the handles being pivotally supported upon stud bolts 9 carried by ears 10 extending from the sides of the head 1. The said handle members 8 are normally held in an expanded or open position by springs 11 carried by the stud bolts 9, each spring having one end held in and engaging the side of a recess formed in each side of the head 1, and its opposite end engaging the respective members of the handle S, as clearly shown in Figs. 2 and 3. The inner ends of the arms 3 are formed with extensions 12, between which is interposed an expansion spring 13, which serves to force the inner ends of the arms 3 outwardly, and consequently to hold the gripping jaws 4 open when the handle members 8 are in their extended position.

As will be noted, the outer faces of the gripping jaws 4 are substantially semi-circular in plan, and thus provide cam surfaces 15 to permit the said jaws 4 to easily ride over the outer edges of the opening or channel 2 when the handles 8 are forced together, and hence to easily force the outer ends of the jaws 4 toward each other, and to close the mouth 14 thereof.

ln the use of my device the tool is adjusted so that the gripping jaws 4 will aline with the eye of the Cotter pin, as shown in dotted lines in Fig. 2, then by gripping and forcing the handle members 8 together (as shown by the arrows in Fig. 2), the first movement of the said handle members will, through the medium of the links 6, draw the arms 3 inwardly and thus bring the cam surfaces 15 of the jaws 4 into engagement with the edges 16 of the opening or channel 2 of the head 1, hence forcing the jaws 4 together and forcing the ends of the jaws through the eye of the cotter pin, as shown in Fig. 3; then by a continued movement of the handle members 8, the arms 3 will be drawn inwardly through the opening or channel 2 of the head. This movement will consequently throw the outer end of the head into engagement with the side of the shaft, or the side of the nut of a bolt, from which the pin is to be withdrawn, when upon a further movement of the handles 8 the arms will be further drawn into the opening of the head l to thus withdraw the pin from its opening in the shaft or bolt as the case may be, it being noted that the head l is formed upon its top and bottom portions with slots 17 opening through the outer end of the head so as to receive the head of the cotter pin as it is withdrawn.

It will thus be seen that the operation, as well as the tool itself, is exceedingly simple. I have found from actual experience that I can withdraw a cotter pin with but very slight exertion, irrespective of the angle at which the shanks of the pin have been previously bent, and without injury to the pin.

I do not claim broadly the idea of providing a device for extracting cotter pins from bolts or shafts, as I am aware that other devices for this purpose are now on the market,

- but I do claim that heretofore no device has been devised wherein there is employed an extractor having jaws moving simultaneously within the head of the tool, and adapted to lock within the eye of a cotter pin, and requiring but a single mechanical movement to extract the pin, such as is vshown in my device.

What I claim is l. A cotter pin extractor, comprising a head having a channel-way and a recess formed therein, said recess being adapted to receive the eye of a cotter pin, extracting arms slidably retained in said head having their outer ends terminating in cam surfaces adapted to engage the sides of said channelway, handle members pivotally connected to said head and to the inner ends of said arms, springs engaging said handle members and springs engaging said extracting arms for holding them in a normally open position.

2. A cotter pin extractor, comprising a head having a longitudinal opening or channel-way formed therein, extracting arms slidably retained in said opening or channelway having their outer ends terminating in jaws, the outer faces of said jaws providing cam surfaces, and operating handles pivotally connected to said head and operatively connected to said arms, whereby, as the handle members of the extractor are forced t0- ward each other, the said jaws will be caused to enter the eye of the cotter pin and thereafter to exert a pulling or extracting movement upon the cotter pin.

8. A cotter pin extractor, comprising a head having a longitudinally arranged opening or channel-way formed therein and slots opening through the outer end of said longitudinal opening or channel-way, arms slidably retained in said opening or channel-way having their outer ends terminating in jaws, the outer faces of said jaws providing cam surfaces, operating handles pivotally connected toY said head and operatively conhead of the extractor,

nected to said arms, and means associated with the inner ends of said arms for holding the outer ends thereof in an open position when the handle members of the extractor are in an open or extended position.

4;'. A cotter pin extractor, comprising a head having a longitudinal opening or channel-way formed therein, extracting arms slidably retained in said opening or channel-way having their outer ends terminating in jaws, the outer faces of said jaws providing cam surfaces adapted for engagement with the outer edges of the opening or channel-way of the head, whereby to contract the said jaws and cause them to engage the eye of a cotter pin and thereafter to withdraw the cotter pin as the arms are drawn into said head, and handle members operatively connected to the inner ends of said arms,-as and for the purpose speciiied.

5. A cotter pin extractor, comprising a head having a longitudinal channel-way and provided with recesses in its upper and lower surfaces, said recesses adapted to receive the eye of a cotter pin, extracting arms movably retained in said head having their outer ends terminating in gripping jaws, the outer surfaces of said jaws being curved to provide cam surfaces adapted to engage the walls of said channel-way whereby to close the said gripping jaws when the extracting arms are drawn into said head, handle members operatively connected to said head and to the inner ends of said extracting arms, and independent springs for normally holding said arms and said handle members in a normally open position.

6. A cotter pin extractor, comprising a head having a longitudinal opening or channel-way extending therethrough, said head having slots in its upper and flower surfaces opening through the outer end of said head, arms slidably retained insaid openingH or channel-way having their outer ends terminating in gripping jaws, the outer faces of said jaws being substantially semi-circular in plan providing cam surfaces, handle levers pivotally connected to'said head and operatively connected to the inner ends of said arms, whereby, as said handle members are operated, the outer ends or jaws of said arms will be caused to first enter the eye of the cotter pin and then to be drawn into the as and for the purpose specified.

7. A cotter pin extractor, comprising a .head having an opening or channel-way extending longitudinally therethrough, extracting arms carried by and Vmovable through said opening or channel-way,-said arms having jaws at their outer endsgadapted to engage the eye of a cotter pin, handle members pivotally connected to said head, links pivotally connecting'the inner ends of said extracting arms and said handle meinbers, springs for normally holding said handle members in an extended or open position, and a spring associated with the inner ends of said extracting arms for holding their outer ends or jaws in an open position when said handle members are extended.

8. A cotter pin extractor, comprising a head having a longitudinal opening or channel-way formed therein, extracting arms arranged within and movable through said opening or channel-way, said arms having their outer ends terminating in jaws the outer faces of which are curved to provide cam surfaces, handle members pivotally connected to said head, links connecting said handle members with the inner ends of said extracting arms, springs for normally holding said handle members in an extended or open position, and a spring associated with the inner ends of said extracting arms for holding their outer ends in an open position when said handle members are in an extended position.

9. A cotter pin extractor, comprising a head having an opening or channel-way extending longitudinally therethrough, and having open slots in the opposite faces thereof, extracting arms movable through said opening or channel-way, the outer faces of said arms terminating in gripping jaws, operating handles pivotally connected to said head, links connecting said handles with the inner ends of said arms, and a spring arranged between the inner ends of said arms for forcing the outer ends thereof apart when the said handle members are in an extended position.

10. A cotter pin extractor, comprising a head having an opening or channel-way extending longitudinally therethrough, extracting arms arranged within and movable through said opening or channel-way, said arms having jaws at their outer ends adapted to engage the eye of a veotter pin, the outer faces of said jaws being substantially semicircular in plan providing cam surfaces adapted to engage the inner walls of the opening or channel-way of said head whereby to close the said jaws as the arms are drawn within the said opening or chamielway, operating levers pivotally connected to said head, links connecting said levers with the inner ends of said arms, and springs for respectively holding said handle members and the outer ends of said arms in an extendddor open position, substantially as speciln testimony whereof l have hereunto set my hand this 28th day of August, A. D.

JOHN A. ANDERSON. Witnesses:

Srorswooo D. Bowers, M. E. HITCHCOCK.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C.