US1350970A - Base for jacks - Google Patents

Description

A. E. HUTCHISON AND H. KRAH.

BASE FOR JACKS.

APPLICATION FILED 1AN.22. |920.

1 350, 970. Patented Aug. 24, 1920.

WI TIVESSES INVENTOR 5 A TTOHNEYS oarreo STATES.

PATENT OFFICE.

ARTHUR EDWARDS HUTCHISON AND Hearty KRAH, on NEW YORK, n. Y.

lBASE FOR JACKS.

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Specification of Letters Patent.

Patented Aug. 24, 1929..

Application filed January 22, 1920. Serial No. 353.259.

To all whom it may concern:

Be it known that we, ARTHUR E. HUTOHI- SON and HARRY KRAH, both citizens of the United States, and residents of the city of New York, borough of Brooklyn, in the county of Kings and State of New York, have invented a new andlmproved Base for Jacks, of which the following is a full, clear, and exact description.

The present invention relates to new and useful improvements in jacks, and it pertains more particularly to lifting jacks especially employed as an accessory of motor vehicles. In jacks of this type difliculty has been experienced in maintaining the jacks in true vertical alinement during the lifting operation.

It is one of the objects of the present invention to provide means whereby the lifting operation is carried out with greater facility than with jacks as at present constructed.

The invention consists of a rigid base adapted to be removably secured to a jack of ordinary construction when the same is in operation, said base being capable of removal therefrom when the jack in not in operation.

The invention further consists in so constructing the securing means for the jack that the latter may be adjusted with respect to the base.

With the above and other objects in view reference is had to the accompanying drawings in which Figure 1 is a perspective view showing the jack in place upon the base;

Fig. 2 is an inverted plan View of the base,

\ and Fig. 3 is a detail sectional View. Referring more particularly to the drawings, the device comprises a base 5, which is preferably rectangular in form. This base is the base and merging into said point 7, is a reinforcing rib 9. Between the ends of each of the reinforcing ribs 8 and 9, said ribs are provided with suitable bolt-head-receiving recesses 10, and said recesses are formed by terminating the ribs as at 11, and forming a continuous wall 12 of substantially oval shape.

The base is provided in each of the boltreceiving recesses 10, with a slot 13, which passes entirely through said base, and said slots have straight side walls 14, the purpose of which will be hereinafter described.

The reference character 15 designates bolts, and one of these bolts is adapted to be passed through each of the slots 13 from the rear face of the base 5, the heads of these bolts lying within the bolt-receiving recesses 10, as designated in Fig. 2. These bolts 15 are provided near their heads with square portions 17, and these square portions 17 are adapted to engage the straight side walls 14 of the slots 13 to prevent a rotating movement of the bolts within the slots.

The free threaded end of each of the bolts 15 is adapted topass through a lug or dog 19, and these lugs or dogs 19 are movable with respect to the top face of the base 5 for a purpose to be hereinafter described. The lower face of each of these dogs 19 is serrated as at 20, and these serrations 20 are adapted to interengage with the serrated surfaces 21 on the base 5 adjacent the bolt openings or slots 13. Threaded upon the free end of each of the bolts 15 and adapted to form the means for tightening the dogs or lugs 19 in position, is a nut 22, and interposed between each of the nuts and the top face of each of the dogs 19, is a washer 23.

The device operates in the following manner:

The reference character 30 designates a jack of the ordinary type, and 31 indicates the base thereof. This base 31 is adapted to be received upon the base 5, and after it has been thus positioned, the nuts 22 are loosened to permit of a movement of the dogs or lugs 19, so that their cut-out portions 25 will overlie the base 31 of the jack 30. WVhen these lugs have been thus positioned, the nuts 22 are tightened to draw the serrated faces 20 and 21 of the dogs 19 and the base 5, respectively, into engagement with each other to secure the dogs against accidental displacement.

By this construction it will be seen that a flat support for the jack 30 is formed by the base 5, and that, at the same time, said base is removable from the jack in order that-the parts may occupy comparatively little space when not in use.

plurality of elongated openings, a plurality of serrations surrounding each of the openings on the top face of the base, a lug having a plurality of serrations adapted for interengagement with the serrations surrounding the openings in the base, bolts having I 10 squared portions, the square portion of said bolts being adapted to be received within the elongated openings in such a manner as .to prevent turning of the bolts, said bolts passing through the lugs, and nuts adapted for engagement with the bolts whereby the lugs are adjustable relative to the base for rigidly securing a jack in position on the top face of said base.

v ARTHUR EDWARDS HUTOHISON.

mum! KRAH. I

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