US1404824A

US1404824A - Lifting-jack

Info

Publication number: US1404824A
Application number: US409413A
Authority: US
Inventors: Williams William
Original assignee: Individual
Current assignee: Individual
Priority date: 1920-09-10
Filing date: 1920-09-10
Publication date: 1922-01-31
Anticipated expiration: 1939-01-31

Description

W. WILLIAMS.

LIFTING JACK.

APPLICATION FILED SEPT. 10. 1920.

Patented Jan. 31

WILLIAM WILLIAMS; oriv nnnniiinnnna", vieroiarh. AUSTRALI 'assieiionor' one SIXTH TO SAMUEL RICHARD rnin'ciioiien; osrroonax, VICTORIA; AUSTRATJA.

LIFTING-J'ACK.

menses;

To aZZw/bQmit may concern:

Beitknownthat I, WILLIAM WILLIAMS,

a subject of the King of Great Britain and Ireland, 6130., residing at Murriimbee'na. in

the State of Victoria, Commonwealth of Australia, have invented certain new and useful Improvements in Lifting-Jacks, for which I have filedfan application Australia,'l\lay 19,; 1921 No. 15,730;" and I do hereby declare the following to bea full,

clear, and exact description of theinven tion, such as w ll enablefothers skilled in i the art to whichit appertains to make and to lift a load. a

use the same.

This invention rela t to j liftingcks huh ing a fiked and a lifting pillar and whereby after each lifting stroke the lifting pillar locks itself in raised position. Means of adjustment are provided so, that the lifting pillar headyor load supporting part, will begin its work at the height required, and the distance of lift of each stroke may be regiilat edr The ackmay be all netal, or wood,

the latter beingi useful to; form a fixed pillar base .of considerable area but light weight; or metal extensions may be bolted on or be integral with the base of the fixed pillar. Integral'with or boltedon the fixed pillar are guides for the liftingpillar to make the latter when moved rise or fall in a vertical plane or nearly so. Other parts of the construction will be explained by reference to the drawings herewithj in which the lifting jack isillustrated but the construction maybe varied in designs proportions and minor details of parts while retaining matter hereinafter cla med. The drawings. are partly diagrammatic.

Figure 1 is a side view of the jack ready FigureQ is a side {View of the jack showing'the parts at the end; of alifting stroke.

Figure 3 is'1a plan ofthe jack iii-horizontal section onlines E, E through Fig;

ure 1 omitting the handle. I

Figure 41 is a sectional i iew through the.

fixed and lifting pillars.

lever. i

Figure 6 shows parts of my jack in dupli- Specification 0t Letters Patent.

but using only one handle. 7 v I F gure 7 shows inside viewpartof the lifting pillar modified, andadjacentparts.

I Patented J 3.11.3 9 1922. Application filed September 10, 1920. Serial No. 409,412. r

cateq to explain lhow to lift a vehicleflaxle I or like broad load byapplying two jacks I lgL1IBi8 is a sectional plan of part-of,

Figure 7. I

The fixed pillar 2has a foot 1, and straps or loops 3, e which enclose and guide the lifting pillar 10 during vertical movement of the latter.

Strap 4 has an eye5 to hold the leg top 6 hereafter described. The lifting pillar has a slot or a series of slots 9-or a hole 9 orfs er iesof holes alongits length, andhas a wide top 10 for load supporting purposes.

Hinged to one end 11 of head 10 is a plate- 12, on which the load can be supported, but plate 12 can be swung out of working posion top 10 The under side ofplate 12 has flanges tion as indicated by'the adjacent arrow in Figure 1, so as to allow theloadto be lower,

12. Pillar 10" may have at its lower part a hook, eye, step, or the like for connection 1 or support of the articlefito be lifted. .A"

transverse bolt 1O or the transverse part of a member 10 forming a pivot is engaged through a lifting/pillar slot?) or hole 9 and at each side of pillar 10 the bolt 1O car! riespivotally a link 10 the other end of which is pivoted to a lever 14 which is rej cessed and. is shown of looped form or U, shape. In some cases instead of links lOP the U shapedlinking member shown in Fig-vv ure 7 is used having arms or sides 10.

In the fixed pillar there is a hole for a pivot bolt at 2 which also passes through the sides of lever '14:. Lever 1 1 is fulcruined bythepivot boltat 2 and at-14 is pivoted to. links .10 or arms 10*. c

is moderate by' pressure of an attendants foot on its outer end 15, but for heavier loads 1 thelever is to be grasped by a removable p l handle 16 which when attached forms a. le- Figi'ire 5 is a vi wet the outer end ofthe vei' extension. For attachment purposes this of which is to be engaged with the transverse end 15 of the lever. One of these slots extends obliquely to the handle length, an-

7 other is about longitudinal with said length,

and another is about at right angles thereto. By utilizing a suitable slot the handle can be set to. extend in a suitable position for operation, having in view the surrounding circumstances. The front bearing 5 encloses the top 6 of leg 7 having at its base a foot 8 which extends forwardly when required as in Figures 1 to 3, to help to support the loaded jack.

This foot can be swung to the side of the jack, or the leg can be raised a little and rotated to the rear when it is not required for supporting purposes.

In order to lift the whole of an axle and connected parts uniformly, or to lift a like specially wide load, two jack bodies are used but only one handle 16. K 7

Parts of two jacks are shown in Figure 6; the two levers 14 are spaced apart to the distance by adjustable framing consisting of bent slide bars 14*, 14 one at each side, at tached to the levers as by fitting on lugs 14 on the latterpThe lugs 14 are screw threaded, carrying nuts .21, the parts of each jack not shown in Figure 6 being as in Figure 1. Collars 14 on slide bars 14 14 hold-them in adjusted position, and each collar may have a set screw.

' hen the (or each) lifting pillar is lowered,'and loaded ready for lifting, the handle'is engaged with lever 14 or with the cross framing in Figure 6. The handle will be'operated to depress the outerend of the, (or'each) lever 14; This raises the movable pillar (or pillars) but towards'the end of thelever stroke the links 10 (or the mem bers 10 are swung so that their pivots 14 at the end of each lever 14 pass their dead centres, as will be understood from Figure 2 or Figure 7 causing a slight fall of the lifting pillar resulting in pressure being applied to each lever 14 tending to swing its pivoted end as per arrow B. But at the time stated the outer end of each lever 14 bears against the fixed post 2 as inFigure 2 at 2 or a like stop so that the lever can move no farther, and the jack becomes locked against lowering of the raised load.

The detachable handle may be used at will to "release each lever, and thus each lifting pillar. I

There may be one or more additional fulcrum holes in lever 14 as at 2 so that the lover is made adjustable by shifting the fulcrum pinto vary the lever effect under the application of power. V

The handle outer end has a hook which can be engaged under the base of end 15 of lever 14 when the latter is lowered, so that by pulling the handle the lever can be raised to lower'the lifting pillar.

The slots 9 are cut into that side of pillar 10 which is remote from pillar 2, pillar 10 having an unbroken edge alongside of the edge of pillar 2.

It is important that there shall be easy detachment from the engaged slot of "the part 1O or 10 set therein, andeasy adjustmembers at Wand 10 to be located in pillars having only small dimensions from the front 0 to the rear D. i Having described this invention, what claimed by Letters' Patent is 1. In a lifting jack, a lifting-pillar in 1 front of a fixed pillar, a lever of U shape pivotedto the fixed pillar and linked tothe lifting pillar, and a handle having a serie's of end slots extending in different directions for engagement of a suitable slot with a transverse part of the. lever.

2. Ina lifting jack, a lifting pillar, a fixed pillar linked to the lifting pillar,

guide loops on the fixed pillar through which loops the lifting pillar passes, and a leg pivotally supported by one of saidloop's.

3. A lifting jack having a lifting pillar,

the front edge of which contains aseriesof slots,'a fixed pillar'behind the lifting pillar and having projecting loops by which the liftingpillar is kept in alignment, a recessed lever pivoted to the fixed pillar, and linking means engaged in one of the said slots and pivoted to thelever, so that a stroke of the lever raises the lifting pillar and, locks it in raised position. 4. In a lifting jack, a fixed pillar having an enlarged foot, and upper and lower forwardly projecting loops which guide and retain a lifting pillar in alignment, a socket 011 the lower loop, and an adjustable leg the top of which engages the socket. 5. In a lifting j ack,the lifting pillar adjacent to a fixed pillar behind it, loops from the fixed pillar to guide the lifting pillar, an

adjustable lever pivoted to the fixed pillar,

adjustable linking means pivoted -to' the. lever, slots in the liftingpillar front edge in any, of which the linking means is engageable, and an adjustable leg the top of which is socketed in front of the lifting pillar. Y 1

6. .A lifting jack having the construction in claim 6 combined with a handle which has at one end a series of slots. extending in different directions, and at the other end a hook. L H p 7. Lifting jacks of the kind described each having a U shaped lever by which to lift apart by intermediate framing, and ahandle and lock a lifting pillar in raised position, to move the said framing to raise the lifting combined with transverse framing and a pillar of each jack. 10 handle having slots in its end for the pur- In Witness whereof I have hereunto set 5 pose set forth. my hand.

8. The combination of two lifting jacks of the construction stated in claim 3 spaced WILLIAM WILLIAMS.