US1800377A

US1800377A - Tool retainer

Info

Publication number: US1800377A
Application number: US328844A
Authority: US
Inventors: Edwin J Downing
Original assignee: Gardner Denver Inc
Current assignee: Gardner Denver Inc
Priority date: 1928-12-31
Filing date: 1928-12-31
Publication date: 1931-04-14
Anticipated expiration: 1948-04-14

Description

April 14, 1931- E, J. DOWNING 1,800,377

TOOL RETAINER Y Filed Decv 5]., 1928 2 Sheets-Sheet 1 Pnl 14, 1931- E. J. DowNlNG 1,800,377

Patented Apr. 14, 1931 UNITED sTATEs PATENT OFFICE EDWIN J'. DOWNING, OF DENVER, COLORADO, ASSIGNOR TO GARDNER-DENVER COM- PANY, OF DENVER, COLORADO, A CORPORATION OF DELAWARE Toor; RETAINER Application led December 31, 1928. Serial No. 329,644.

The object .of the present invention is to provide a tool retainer in which the tool-engaging member or yoke is more securely held against any tendency to open under the strain of blows delivered to it by the tool that is retained thereby, the means that yieldingly resists the movement of the yoke. moreover having merely a rectilinear movement as distinguished :from a swinging or klateral movement.

In the accompanying drawings there is disclosed the preferred embodiment of the invention and therein- Figure 1 is a plan view of the chuck end of is a rock drill with the retainer in place.

^ fio housing.

Figure 2 is a longitudinal sectional view on theline 2-2 of Figure 1.

Figure 3 is a front elevation. Y Figure 4 is a perspective view of the chuck Figure 5 isa perspective view of the retaining yoke. Figure 6 is a sectional view on the line 6-6 ofFigure 1.

i The drilllst'ructure, itwill berunderstood,

may be of any desired type Aand includes a chuck end 7 with a chuck 8 therein to receive the shank 9 of a drill steel or other tool. This shank has the usual enlargement shown in f o the form of a collar 10. Thetool, it will be -v spaced longitudinally disposed ears 13 anda central elongated portion 14 located between the ears 13 and provided with a longitudinal slot 15. This slot opens into a longitudinal chamber 16 that opens through the front end 1- 5 of the enlargement.

A blow-resisting stirrup of substantially U-shape is mounted on the housing. It consists of side arms or bars 17 slidable in the ears 13 and having annular stop flanges 18 w that limit their rearward movement. On the rear end'portions of the side arms are relatively heavy coiled springs 19 that bear against the rear ends of the ears and against nuts'20 located on and suitably locked to the rear terminals of the side arms. The front ends of said side arms are connected by a cross bar 21 preferably integral with the side arms. It will be noted by reference to Figures 2 and 3 that the cross bar 21 is located at one side of the shank 9 of the tool and is suiiiciently spaced .therefrom to at all times permit the passage of the collar past the same,

so that in itself this stirrup does not inter fere with the introduction and removal of the tool from the chuck.

The retaining member is in the form of a yoke 22 carried by a' rearwardly extending arm 23vthat swings in the slot 15 and has at 1 its rear end an integral cross pin 24 constitutivot that is located in the chamber T e yoke 22 is adapted to embrace the shank of the tool as shown in Figure 3, but the space within it is insuihcient to permit the passage of the collar 10. V(lonsequently when in the position shown in Figures 2 and 3 this yoke, while permitting a limited movement of the steel, is in the path of the collar and therefore prevents the detachment of the steel from the chuck. The upper portion of the yoke is in the form of a relatively heavy body 25, and said body and yoke proper slide ing a 'transversely of and against the rear side of ,the cross bar 21 of the stirrup. The front face of said yoke and body are provided with

recessed seats

26 and 27, in which the cross bar 21 is `adapted to engage when the yoke is in its operative and when it is in its inoperative position. The bearing of the yoke against the cross bar is cured by means of a coiled spring 28 located in the rear end of lthe chamber 16 and bearing against a washer 29 that inturn has a recess 30. Its front side constitutes a pivotal bearing for the cross pin 24 of the arm 23 of the yoke. The spring 28, it will be noted is very much lighter than the springs 19 of the stirrup. The arm 23 preferably has an outstanding finger piece 31 by means of which the yoke can be readily swung.

With this construction, it will be noted that the yoke 22 can be swung transversely of the chuck and tool shank and to and from a position in the path of the collar of said shank.` l/Vhen moved to either position the cross-bar 21 of the stirrupV engages in ene Vof the seats 26-27 yand thus ih o'lds the yokeV in its active or inactive position. By forcing the yoke transversely the cross bar Qlcan be unseated as the vspring 28 will yieldy and permit the rearward movement of the yoke. The stirrups 17-21, however', has no lateral movement and consequently when the yoke is in its active position, as shown in Figures 2' be apparent to those skilled inthe art Without further description, and it will be Vunderstood that various :changes in the size, shape,

proportion and minor details of construction may be resorted to without departing from the spirit or sacrificing .any 0f ,the ldvltages 'of the invention; What I claim, is:

1.- The Combination with .echuok for holding a tool having an enlargement, of a. tool retainer comprising a yielding stirrup memv ber mountedV on the chuck, and a device having an independent mounting. in the chuck and movably engaged with the stirrup mem- Y ber therewith7 and movable to and from a .position in the path of the enlargement ofV .af tool placed in the chuck. Y 2. The combination with a chuck for holding a tool having an enlargement, ofl a tool l retainer comprising a yielding Stirrup inember mounted on the chuck, and a device pivoted on the chuck and on an axis transversely thereof, and having a portion Ymfnfalole to and from a position between the member andV theV enlargement of a tool placed Y in the chuck in the path of the enlargement.

3,Y rlhe combination with a'chuckfor holding a tool having an enlargement, of a stirrup having spaced portions slidable longitudinally of the chuck, spring means resisting suchV movement, and a retaining yoke having a mounting` on ythe chuck between the V spaced portions of the stirrups and-having a part movable transversely of the stirrup Vin Vengnigement therewith and to and from aposition in the path of a tool placed inthe chuck. '4. The coinbination'with a chuckfor holding e tool having an enlargement, of a stirrup, having spaced portions slidablelongitudinejlly the chuck and having e eroe/S .bar in .advance thereof, spring means resisting such movement, and a retaining yoke Vpivoted on the chuck between the spaced portions and having a part movable transversely of the stirrup in engagement with the cross bar .end to and .from apositionin the-path foi a tool placed in the chuck.

5. .The combination with a chuck for Vholding a toolhaving an enlargement, said .chuck having. longitudinal gudewayLsy-.of .a

Vstirri-ip ,comprisingside reds slidable in the guideways andja cross bca-reconnecting the 'side bars and located at the sideand out of the path of the, enlargement of a tool placed in and removable from the chuck, and a tool embracing yoke `Irioiinterl on the chuck .be-

tween Lthe 'guidewey .and .sllidablyv engaged? with the'oross bar ofthe' stirrup andniovablewith .respect thereto into and out oi the path of the enlargement of .a .tool placed in the chuck.. Y

.6. The combination-With aohuck for hold-V ing e tool'liavng .en enlargement, said chuck having longitudinal-guidewuya Of a stillllp comprising'side rods slidable in the guide- WHYS endA e cross" bar connecting the Aeide 'bare und. Vlooatedat .the eide. out-'of the pathof the enlargement of a toolV placed in and re- Vmovable from the. chuok. and a .tool embracing yoke .Slidelbly engaged with Vthe cross 'ber of the .Stiirup and movablewith respect thereto into and out o f the path .of the enlarge-v ment of e tool pla-'eedl in .the chuck, .Said v'yoke having recessed .Seats in which .su-id cross vbar detachably engages to hold the'yoke. v

7. The combination with a chuck for' holding a tool having an enlargement, .of a stirrup Slidablelongitudinally; .of the chuck, .spring means resisting suchmovement, anda tool-V f retaining yokeV mounted. .on the chuck and movable' toand ironie positioninthe pathof the enlargement of atool inthe chuck, and

having a portion movable behind .and engeged by the'etirrupE Y 8.. lThe combination with a chuck ior hold# ing e tool having en enlargement, seid chuck having longitudinal. guideways., of .Stir'rup `e.omprieing'.Side rodsfslidable in `the guide- Way's and a cross bar connecting the side bars and located at-theiside and out of. the path of `:the enlargement of a tool placed in and-' removable from the chuck, and a tool-retaining yoke mounted on the chuck and movable to andk from. e.` position in the path fof the enlargement of a toolin the chuck and having .a portieri movable beliindandengaged by the cross bar.

Lf1.20V

, 9.. The combination With a'chucli for. holdv ing a tool having en enlargement, said. chuck having longitudinal guidevvays', of a stirrupl comprising side rods slidable vin the guide- VWays and a cross bar connecting the side Vbars and located at the side'` and out of. the path of the enlargement of a4 tool placed inland removable from the chuck, and a tool-embracing yoke having an arm pivoted on the chuck,

said yoke being slidably engaged with and being located behind the cross bar and movable to and from a position in the path of the enlargement of a tool in the chuck.

10. The combination with a chuck for holding a tool having an enlargement, said chuck having longitudinal guideways, of a stirrup comprising side rods slidable in the guideways and a cross bar connecting the side bars and located at the side and out of the path of the enlargement of a tool placed in and removable from the chuck, a tool-embracing yoke having an arm pivotally and slidably mounted on the chuck, said yoke being slidably engaged with and being located behind the cross bar and movable to and from a position in the path of the enlargement of a tool in the chuck, and a spring acting against the yoke to urge it forwardly.

11. The combination with a tool holding chuck including a housing having longitudinal ears and a longitudinal slot between said ears, of a stirrup comprising side arms slidable in the ears and a cross bar connecting the front ends of the side arms, springs on the rear ends of the side arms and resisting the forward movement of the stirrup, a tool-embracing retaining yoke having a rearwardly extending arm slidably and pivotally mounted in the slot, said yoke having its front face slidable transversely of and against the rear side of the stirrups cross bar, and a spring bearing against the rear end of the yokes arm to yieldingly urge the yoke against the cross bar.

12. The combination with a tool holding chuck including a housing having longitudinal ears and a longitudinal slot between said ears, of a stirrup comprising side arms slidable in the ears and a cross bar connecting the front ends of the side arms, springs on the rear ends of the side arms and resisting the forward movement of the stirrup, a tool-embracing retaining yoke having a rearwardly extending arm slidably and pivotally mounted in the slot, said yoke having its front face slidable transversely of and against the rear side of the stirrups cross bar, a spring bearing against the rear end of the yokes arm to yieldingly urge the yoke against the cross bar, said spring being weaker than the springs on the side arms of the stirrup, and seats in the front side of the'yoke for receiving the cross bar to hold the yoke against its movement with respect to said cross bar.

In testimony whereof, I ailix my signature.

EDWIN J. DOWNING.