US2598119A

US2598119A - Chuck wrench ejector

Info

Publication number: US2598119A
Application number: US92098A
Authority: US
Inventors: John W Goff
Original assignee: Individual
Current assignee: Individual
Priority date: 1949-05-09
Filing date: 1949-05-09
Publication date: 1952-05-27
Anticipated expiration: 1969-05-27

Description

May 27, 1952 w, GQFF 2,598,119

CHUCK WRENCH EJECTOR Filed May 9, 1949 Patented May 27, 1952 UNITED STATES e TENT other: I

GHUGKWBENCH EJEGTOR m Gcfl, St. Paul, Minn; Application May 9, 1949,.Serial No. 92,098;

In the operation of a lathe, drill press or: the; like; the operator will occasionally forget toremove the wrench or key from the work-holding chuck after the tightening; thereof about a work piece. Rotation of the chuck causes the wrench to-be forcibly ejected under centrifugal action; and dangerto the operator or other persons nearby, or damage to the machine, often results. The primary object of my invention, therefore, is the provision of an attachment for chuck wrenches which will automatically remove such a wrench from a chuck upon release of manual pressure thereon.

Another highly important object of my invention is the provision of an attachment as set forth, which will protect the chuck-engaging head of the wrench when said wrench is not in use.

Still another object of my invention is the provision of an attachment as set forth, which may be quickly and easily secured to a chuck wrench or key.

A still further object of my invention is the provision of a device as set forth, which is inexpensive to manufacture, simple and rugged in construction, and efiicient and durable in use.

Other highly important objects and advantages of my invention will become apparent from the following detailed specification, appended claims, and attached drawings.

Referring to the drawings, in which like characters indicate like parts throughout the several views:

Fig. 1 is a view in side elevation of my novel attachment secured to a chuck wrench and applied to a lathe chuck;

Fig. 2 is an enlarged fragmentary view, partly in plan and partly in side elevation, taken substantially on the line 2-2 of Fig. 1;

Fig. 3 is a still further enlarged view in front elevation of a chuck wrench having my novel attachment applied thereto and shown as being removed from a chuck, some parts being broken away and some parts being shown in section;

Fig. 4 is a view in horizontal section, taken on the line 44 of Fig. 3; and.

Fig. 5 is a horizontal section, taken on the line 5--5 of Fig. 2.

Referring with greater detail to the drawings, a multiple jaw chuck is indicated in its entirety by the numeral I and includes the con- 2 ventional' chuck. body 2 and radially-movable jaws 3?.

of the same cross-sectional shape. as the socket 5, in this case; rectangular. At i'tjsj'up er. end,

shank 'i'. is diametrically enlarged? to". p ovid'e'i hea'd' 9i through which" ext nds: a transverse handle it; The chuck wrench 6 'above described is a type commonly used in connection with chucks in lathes, drill presses, and the like.

My novel attachment includes a tubular housing i I having rigidly secured to its upper end, by screws or the like I 2, a bushing I3. The bushing I3 is of a size to slide axially over the shank I of the wrench 6 and may be locked in placed by a set screw i4 having screw-threaded engagement therewith. It will be seen, by reference to Figs. 2 and 3, that the lower end of bushing 13 provides an annular shoulder l5 for a purpose which will hereinafter become apparent. At its lower end, the housing I l is provided with a radially inturned flange it which defines an opening ll. A sleeve [8 concentric with the tubular housing II and shank I is mounted for axial sliding movements in the opening I! and is provided at its upper end with an outturned flange l9 which is adapted to engage the inturned flange it of the housing ll upon axial movement of the sleeve [8 outwardly of the housing Ii. A coil compression spring 20 has its upper end abutting the annular shoulder it: of the bushing l3 and its lower end exerting yielding bias on the outturned flange [9 of the sleeve [8.

When the tubular housing I l is properly located on the shank 1, the sleeve 1 8 encircles the head 8 of the wrench 6, as shown in Fig. 3. When it is desired to loosen or tighten the jaws 3 of the chuck l, the head 8 is inserted into the socket 5 of the chuck i. As illustrated in Fig. 2, insertion of the head 8 into the socket 5 causes the sleeve iii to move axially inwardly to the interior of the housing ll against bias of the coil compression spring 20. Manual pressure must be exerted upon the wrench or key 6 to maintain engagement of the head 8 in the socket 5. Upon release of manual pressure upon the wrench B, bias of the spring 20 will tend to move the sleeve l8 axially outwardly from the housing ll against the jaw-actuating element 4 and cause the head 8 to be automatically withdrawn from the socket The usual .jaw actuating "element or. screw 12' is provided with a socket" 5' which usually rectangular. in cross-section to receive.

5. Thus, the operator is prevented from ac cidentally leaving the wrench in the chuck.

It is important to note that the sleeve I8 is of sufficient internal diameter to enable it to slide freely over the lower end portion of the shank I. The sleeve 18 forms a protection for the head 8 when the wrench B is not being used and prevents the corners thereof from becoming dented or otherwise distorted from impact with other objects, or in the event that the wrench is dropped.

From the foregoing, it will be obvious that I have provided a device which is capable of accomplishing the above objects; and, while I have shown a preferred embodiment of my invention, it will be understood that the same is capable of modification without departure from the spirit and scope of the invention as defined in the claims.

WhatIclaim is:

1. An ejector for a manually-operated chuck 7 internal annular shoulder at its opposite end portions, said yielding means comprising a coil compression spring encompassing said shank and having its opposite ends abutting said annular shoulder and the flange on said sleeve.

JOHN W. GOFF.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 887,644 Jacobs May 12, 1908 2,067,370 Woock Jan. 12, 1937 2,277,945 Ashleman Mar. 31, 1942 2,388,414 Jernigan Nov. 6, 1945 2,442,717 Willette i June 1, 1948 2,488,894 Barrett Nov. 22, 1949