US1479090A - Jack - Google Patents

Description

Jan, 1, 1924 A. J. SLONECKER JACK Filed Dec. 20, 1922 3 Sheets-Sheet 3 24:1*

Patented Idan., l, 1924.

narran stares lld@ PATENT FFFQ.

.AIBIBAIM SLONECKER, OF TEENTON, MISSOURI, ASSIG-NOR TO SLONECKER PRODUCTS COMPANY, OF TRENTON, MISSOURI. I

JACK.

Application filed December 20, 1922.

To all whom t may concern:

Be it known that I, ABmAM J. SLoNnoKnn, a citizen of the United States, residing at Trenton, in the county of Grundy and Sta-'te e of Missouri, have invented a new and useful Jack, of which the following is a specification.

This invention relates to lifting jacks and aims to provide a. novel form of jack which lo may. be conveniently operated in the lifting and supporting of a building or the like, thereby eliminating the necessity of removing the ack and blocking under the building when the jack has been moved to the 1&3 limit of its upward movement.

Another object of the invention is to provide a jack having a swiveled base, the base being reversible to increase or shorten the length of the lifting screw forming a part so of the jack, thereby adapting the jack for various usages.

A still further object of the invention is to provide a quiclnacting jack wherein the weight of the work being lifted may be at transferred from one base to the other base and the base readily rotated and moved to a position adjacent to the upper end of the lifting screw.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood- 1re 5 is a vertlcal sectional view through the jack.

Figure 6 is a vertical sectional view through a jack of the hydraulic type.

Referring to the drawings `bychanacters of reference, the device embodies a lifting screw 5 which is formed with threads 6 dis- Serial No. 608,034.

posed throughout substantially the entire length of the screw, there being provided a reduced portion 7, however, at the lower end of the screw.

The inner base which is indicated at 8 is yformed withacentral opening 9 of a diameter greater than the diameter of the screw 5 to 'permit the lower end of the screw to be positioned therein, the upper end of the inner base being designed to contact with that portion of the inner surface of the outer base 10 directly above the inner base to re strict upward movement of the inner base.

A wall 11 forms a part of the base 8 and Formed in the side wall of the base 8 is' an opening 13 through which opening the key 12 may be passed, when the base S is reversed to add length to the lifting screw 5, it being obvious that by removing the cotter key 12 from its position as shown by Figure 1 of the drawings, and reversing the base 8 end `for end, the shoulder indicated at 14 and formed at the base of the threaded portion of the screw 5 will Contact with the opposite side of the wall 11, the Cotter key 12 being positioned in its opening in a manner as described. It will be further seen that by removing the inner base from the Vscrew 5, the screw 5 may be further rotated to lengthen its stroke.

The outer base is preferably hollow and formed with an enlarged lower extremity 15 designed to engage the supporting blocks 16 usually employed in connection with lifting jacks, for lifting and supporting buildings. Formed in the upper end of the outer base 10 is a threaded opening to accommodate the lifting screw 5 so that when the weight of the work under operation has been transferredV from the base 10 to the inner base 8, the outer base 1G may be readily and easily rotated in an anti-clochwiee direction to cause the same to travel to the limit of its upward movement and rest at the upper end of the screw 5.. f

Secured to the screw 5 at the upper end thereof is a head 1-7, which is formed with a transverse opening to accommodate the operating rod 18, the upper end of the screw 5 being reduced as at 19 to accommodate the work engaging head 20 in a manner t0 permit rot-ation of the screw 5 within the head 20, the upper surface of the head being however roughened to cause the same to be held stationary with respect tov lbase 10 may be readily rotated to cause the same t0' move over the screw 5.v These handles also provide convenient means for handling the'jack to facilitate the transporting of the same.

In the use of the jaclr, it is obvious that with the jack in a positionas shown by Figure Vl of the drawings, and the blocks le and 1-6 as shown in this figure have been positioned under the bases 8 and l0, the base may be rotated until the same moves to 4the upper end of the screw 5, whereupon blocks may be positioned under the base l0 and dispOSejd in parallel relation with the blocks 22. llllith the base l() in this position, it is obvious that as the screw 5 is rotated to lift, the base 8 will be elevated to a posi-tion wherein the lower edge thereof lies in a plane with the lower edge of the base l0.

A block may now be positionedL under the base 8 to transfer the weight from the base l() to the base 8 whereupon the operation as before described may be repeated indefinitely until thc building has been raised to the desired height.

As shown by Figures 3, land 5 of the drawings the principle of the jack is applied to a house movers jack, the screw being indicated at 23 and formed with a tapered upper extremity 24 as well as a tapered lower extremity 25, which tapered extremities are designed to enter the depressions formed in the plates 26 and 27 respectively, the latter plate being' relatively long, may be employed to span the space between adjacent supporting blocks shown more particuhirly by figure -l of the drawings. ln this form of the inventioir the screw acts in the capacity of a combined lifting screw and base, thebell shaped base 28 cooperating therewith being formed with a threaded opening to accommodate the screw.

As shown-the base 28 is formed with oppositely disposed cut out portions 29 through which the plate 27 to be engaged by the lower end of the screw 23, may be passed to properly posi-tien the same, for supporting the workivh-ile the base 28is raisedfor blocking as shown by Figure 5. Openings 30 are formed in the upper end of the screw 23 and are designed to receive the operating bar 3l which may be rotated to rotate the Y screw 23 in manipulatiiig the jack.

Flanges 32 are formed on' the base 28 and provide meansv whereby the base 28 may be `rotated'to accomplish the moving of the base 28 to the limit of its upward movement, whereupon the blocks may be positioned thereunder to support thejack and the work` being lifted.

Each 0f the flanges is formed with an opening 33 for the reception of a bar topermit the base 28'to be rotated under pressure.'

cured to the lifting rodv 38 that extends' through the base 35, the upper end of the lifting rod being supplied with a head 39.

This rod 38 extends below the wall 40 of the base 35 and is formed with afoot 4l at the lower end thereof which foot is formedV with a roughened surface designed to contact with the supporting blocks employed in connection with devices of this'character, to prevent slipping of the jack while the same is in operation.

At the lower end of the base 35 is an enlargement 42 which rests on the blocks usually positioned under the jack for supporting the jack in a predetermined position after the same has been raised. Ports 42 are provided in the cylinder 36 in which ports pipes 43 arepositioned, the pipesl 43 providing communication betweenv the cylinder 36 and a suitable source of fluid supply not shown, means being provided for controlling the passage of fluid to and from the cylinder to cause the operation of the rod 38.

In the operation of the jack as shown by Figure 6 of the drawings, fluid is admitted to the lower portion of the cylinder 36 through the lower pipe 43 with the result that the rod 38 is raised. When the rod 38 has been moved to the limit of its upward movement, a block is positioned under the foot ll whereupon fluid is admitted to the cylinder 36 through the upper pipe 34, raising the base 35 to a position to permit blocks to be laid thereunder.

This operation is repeated until the work being lifted has reached the desired height.

l. A lifting jack comprising a screw, a.

` reversible base swiveled on the lower end of the screw, a hollow movable base adapted to move over the screw, means for rotating the screw, and handles on the hollow movable base for rotating the hollow movable base.

2. A lift-ing jack comprising a screw having a continuous thread. :termed then-2on-1 and having a reduced lower extremity, a hase same to move over the screw, and means for 10 having an opening extending therethrough rotating the screw.

and having a wall formed adjacent to one In testimony that I claim the foregoing end of the base, said wall having an opening as my own, I have hereto aliixed my signato accommodate the reduced end, means for ture in the presence of two witnesses.

securing the base to the screw, a hollow mov- ABIRAM J. SLONECKER. able base adapted to normally house the lirst Witnesses: mentioned base, said hollow movable base I. E. SIMPSON,

having a threaded opening to permit the AGNES RocKnLLr.

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