US1757982A - Lifting jack - Google Patents

Description

m M" 1930. w. B. TEMPLETON LIFTING" JACK Filed 061?. 51-, 1927 Patented May 13, 1930 UNITE STATES WALTER BREAKENRIDGE TEMPLETON, OF CHICAGO, ILLINOIS LIFTING JACK Application filed October 31, 1927. Serial No. 229,835.

This invention relates to improvements in lifting jacks and it consists in the matters hereinafter described and more particularly pointed out in the appended claim.

The general object of my invention is to provide a novel lifting jack which shall be safer in use, which shall be of minimum weight, which shall be relatively inexpensive to manufacture, which shall provide means whereby it may be readily gripped by hand, and which shall be of such form and construction that it will withstand rough usage without breakage.

A further object of the invention is to improve the construction of the barrel or column of the jack by providing an opening therein which will permit observation of the lifting element and its position in the barrel or column thereby constituting a valuable safety factor.

Another object of the invention is to provide, in a barrel of minimum size a novel carrying handle which shall furnish ample hand room but which shall not project so far laterally as to be easily broken off by the rough use which a jack usually receives in service. I

These objects of the invention as well as others, together with the many advantages thereof will more fully appear as I proceed with my specification.

In the drawing I Fig. 1 is a view in front elevation of a lifting jack embodying the preferred form of my invention.

Fig. 2 is a view in side elevation thereof.

Fig. 3 is a horizontal sectional view as taken on the line 33 of Fig. 1.

The invention is herein illustrated and will be herein described as embodied in a lifting jack of the screw type, but I do not wish to be limited thereto, because as will be apparent, the salient features of the invention may be embodied in other types of acks where the peculiar characteristics of the invention make it of advantage to do so.

Referring now in detail to that embodiment of the invention illustrated in the accompanying drawing 1 indicates as a whole the barrel or column of the jack and 2 indicates the lifting screw associated therewith. The barrel is tubular in form and includes an upwardly tapering barrel body 3 with an annular interiorly threaded neck 4 at its top endand an annular bell or base flange 5 at its bottom end whichprovides the necessary stability desired in a jackof this kind. In the neck is threaded the lifting screw 2 of a suitable length to eznend for a considerable distance down into the barrel and on the top end of said screw isswivelled a head 6. On said screw just below the head is an enlargement 7 having transverse openings 8 therein adapted to receive the usual turning bar employed in connection with screw jacks and not herein shown. a

In one side of the barrel body approximately midway between its ends is provided a recess or opening 9 preferably'elliptical in form'with its major axis extending longitudinally of the jack body. Preferably said recess or opening which exposes the interior of the barrel body to view, is defined by a flange 10 to give increased thickness and strength to the wall of the barrel at this point and toreduce the formation of sharp corners. Bridging this opening parallel withand in the plane of its major axis is a strut like meniber 11. Preferably this member is made integral with the barrel body and is slightly bowed outwardly as best shown in Fig. 2 so as to be conveniently grasped as the carrying handle, the minor axis of said opening being suflicient to permit the easy entrance of the thumb and fingers when grasping the handle. The bow or curvature of said handle member as best shown in Fig. 2 is of importance because it is not of such a degree as will buckle under compressive forces and said handle does not project laterally, outward beyond a plane defined by a line 12 drawn from the periphery of the head to the periphery of the hell or base flange. Thus when the jack is arranged upon its sides there is no danger of the handle being broken 01? as the jack would be free to roll upon its head and bell or base flange.

Again the screw of the jack is exposed to View so that the operator may at all times oberve and determine the p sit on of id s rew and how far the screw is expanded so that the danger of the screw being totally expanded or run out as sometimes occurs in the use of jacks as now made, is eliminated. Thus an important safety feature is provided by this construction. By this construction the barrel of the jack may be made lighter in weight, reducing the initial cost to that extent without sacrificing its strength and making it easier to carry about in its extended use.

lVhile in describing my invention, I have referred in detail to the form, arrangement and construction of the various parts thereof, the same is to be considered as by way of illustration only except as may be pointed out in the appended claim.

I claim is my invention:

A jack comprising a body portion forming a tubular column having a neck at one end and a downwardly tapering barrel terminating in a bell shaped base flange of greater diameter than the neck, a lifting screw threaded in the neck, a cap on the top of said screw beyond said neck, said body portion having a substantially elliptical opening at one side between said neck and base flange and exposing a portion of said screw, strengthening flanges on the body portion at either side of the opening and an arcuate strut-like member connecting the body portion at the top and bottom of said opening to provide a carrying handle arranged to come within a plane coincident with a connect-ing point of the cap with a point in line therewith on the base, said strutlike member bridging the opening in the body portion to preserve the strength of said body portion at the opening.

In testimony whereof, I have hereunto set my hand, this 27th day of October, 1927.

WALTER BREAKENRIDGE TEMPLETON.

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