US2294663A - Cradle brace - Google Patents

Description

Sept. 1', 1942. c HUBER 2,294,663

CRADLE BRACE Filed March 10, 1941 INVENTOR ATTORNEY Patented Sept. 1, 1942 UNETED STATES TM OFFICE 2 Claims.

This invention relates to a support for jack hammers, pneumatic drills and other analogous implements such as commonly used in quarries, mines, etc., in which it is necessary to support the implement at varying heights and at widely different angles of approach to the work. It is to be understood that the implement is of the type that is held up to the work and withdrawn therefrom under manual guidance and pressure exerted by the operator and applied directly to T the body of the tool, as distinguished from rigidly mounted implements that are fed by mechanical means.

It is accordingly the principal object of this invention to provide a cradle support for an implement of the type hereinabove set forth, said cradle support embodying a fixed standard to be supported from the ground and a pivotally mounted cradle for carrying the implement and to which said implement may be connected.

With the foregoing and other objects in view, the invention resides in the novel arrangement and combination of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed may be made within the scope of what is claimed without departing from the spirit of the invention.

A practical embodiment of the invention is illustrated in the accompanying drawing, where- Figure 1 is a side elevational view of the cradle brace in operative position to support a pneumatic drill.

Figure 2 is a plan View of the cradle brace.

Figure 3 is a rear elevational view of the cradle brace.

Figure 4 is a view similar to that of Figure 3 of a modified form of cradle brace.

Referring to the drawing in detail, there is shown in Figure 1, by way of example, a cradle brace or support lil mounting a pneumatic drill H. The cradle brace lil comprises a yoke-shaped standard I2 which is preferably formed of a pair of strap iron arms 13 and I4 rigidly joined together at their lower ends by a rivet l5 or any other suitable means. I An elongated socket member I6 is rigidly secured as by Welding to the terminal end of the stem ll of the standard l2. The socket member I6 is provided with a bore I8 which may be circular or non-circular to receive therein the upper end I9 of a support bar 20, the lower end of which is tapered as at 2|.

Pivotally supported by the arms l3 and I4 of the standard [2 is a cradle 25. The cradle is formed of two parallel side members 26 and 21 made of strap iron similar to the yoke arms l3, I4 and respectively pivotally connected to the free ends of said arms by means of the rivets or bolts 28. Preferably the pivotal connection of the arms [3, M to the side members 26 is at a point intermediate the forward end and the center of each side member, such that the center of gravity of the drill H will lie substantially in the plane of the standard l2 whereby to insure perfect balance of the drill on said standard.

At the forward end of the side members 26 and 21 there is provided a saddle 30 formed with a downwardly curved intermediate portion 3| and with parallel upstanding end portions 32 and 33 which are rigidly secured as by welding or any other suitable means respectively to the inside end portions of the side members 26 and 21. Viewing, Figure 1, it will be observed that the saddle 30 extends slightly below the bottom edges of the side members 26 and 21, and serves to support the forward end of the drill H. The rear end portions of the side members 25 and 2'! are provided with aligned openings 35 through which extends a bolt 36. With many forms of pneumatic drills the handle 31 thereof is secured to the casing arms 38 by a removable bolt. In such cases this bolt may be removed and the handle 31 directly secured to the side members 26 and 21 by the bolt 36. Where the handle construction is not of the type as above indicated any suitable form of holding means (not shown) may be utilized for supporting the rear end of the drill (or other implement) to the rear end of the cradle 25.

In Figure 4 there is shown a modified form r of cradle brace, wherein the only difference from that shown in Figures 1, 2 and 3 is in the form of saddle and mounting thereof. In this case the saddle 40 is formed of strap-iron and downwardly bowed, and of a length exceeding the distance between the side members 26 and 21. Fixed to the underside of the saddle 40 as by welding or riveting are a pair of angle brackets 4| and 42, each arranged inwardly of an end of the saddle in opposed relation to each other. The vertical legs of the angle brackets are arranged one on the inner face of each of the side members 26 and 21 at the forward ends thereof and are similarly rigidly secured thereto. The mounting of the saddle 40 is such that the same is seated in elfect on the upper edge of the side members 26 and 21, each end of said saddle projecting laterally beyond its adjacent side members. This form of saddle will support a drill or other implement having a forward end portion that normally would not fit the form of saddle 30, shown in Figures 1, 2 and 3.

With the drill II mounted on the cradle brace it is apparent that the same is supported thereby for any angular position within the limits of pivotal movement of the cradle on the standard. Support bars 20 of various lengths may be provided whereby the drill may be supported at any selected height above the ground.

Having thus described the invention, what is claimed is:

1. A pneumatic drill support comprising a yoke-shaped standard having a stem and an upwardly directed pair of arms, a socket fixed to the lower end of said stem, a support bar having its upper end connected in said socket, and a cradle for said drill pivotally connected to said arms, said cradle comprising spaced parallel side members, a saddle bridging the forward ends of said side members and rigidly secured thereto for supporting the front end portion of said drill, and means on the rear end of said cradle for supporting the rear end portion of said drill.

2. A pneumatic drill support comprising a yoke-shaped standard having a, stem and an upwardly directed pair of arms, a socket fixed to the lower end of said stem, a support bar having its upper end connected in said socket, and a cradle for said drill pivotally connected to said arms, said cradle comprising spaced parallel side members each pivotally mounted on an arm of said standard on a common axis to form said pivotal connection, a saddle bridging the forward ends of said side members and rigidly secured thereto for supporting the front end portion of said drill, and means connecting the rear end portion of said drill to the rear ends of said side members.

CHRISTIAN HUBER.

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