US1638859A

US1638859A - Jack

Info

Publication number: US1638859A
Application number: US76755A
Authority: US
Inventors: William L Knowles
Original assignee: Individual
Current assignee: Individual
Priority date: 1925-12-21
Filing date: 1925-12-21
Publication date: 1927-08-16
Anticipated expiration: 1944-08-16

Description

' 1,638,859 Aug 16 1927- w. L. KNowLEs JACK Filed Deo. 2l. 1925 Patented Aug. 16, 1927.

UNITED -STATES WILLIAM L. KNQWLES, OF FOSTORIA, OHIO.

JACK.

.Application led December 21, 1925. Serial No. 76,755.

This invention relates to an improved jack particularly designedfor use in connection with motor vehicles and seeks, among other objects, to provide a jack which may be positioned beneath either the front or rear axle of an automobile without the necessity of kneeling or reaching or crawling under the vehicle.

The invention seeks. as a further object, to provide a jack which may be shoved under the vehicle and o erated for raising one of the wheels thereo without the necessity of touching any art of the vehicle so that in order to use t e jack, the operator need not' soil his hands or clothing.

Still another object of the invention is to provide a jack wherein the levers employed will be so constructed and arranged that but little effort will be required for operating the jack to lift the vehicle.

And the invention seeks, as a still. further object, to provide a ack which will be simple and sturdy in its construction and which may be produced at moderate cost.

Other objects of the invention not specifically mentioned in the foregoing will appear during the course of the following description.

In the accompanying drawings:

Figure 1 is a perspective view showing my improved jack arranged beneath oneof the rear springs of a conventional motor vehicle and operated to lift the adjacent rear wheel of the vehicle.

Figure 2 is a sectional view on the line 2-2 of Figure 1, looking in the direction indicated by the arrows.

Figure 3 is a detail elevation of the head block of the jack and associated parts.

Figure 4 is a sectional view on the line 4 4 of Figure 3, looking in the direction indicated by the arrows.

In carrying the invention into effect, I employ an oblong head or block 10, and projecting from the side edges of said head are trunnions 11. Swingingly mounted at corresponding ends thereof upon said trunnions isla pair of lifting bars 12, one of which is bent downwardly at its free end and provided with a foot plate 13 while the other of said bars is bent upwardly at its free end and provided with a saddle 14.

Journaled through the head 10 is a shaft 15 having a squared rear terminal 16 to removably receive a crank 17, and fitting the shaft to coact with the rear side of the head is an appropriate thrust bearing 18 secured by a nut 19 screwed on the rear end portion of the shaft. Journaled through the head .10 above the shaft 15 is a stub shaft 2O having a squared terminal 21 for removably receiving the crank 17 and fixed on said shaft is a stop collar 22 confronting the rear side of the head. Fixed to the forward end of said shaft is a pinion 23 and meshing with said pinion is a gear 21 fixed on the shaft 15. nclosing said gear and pinion is a vcover 25 secured to the edges of the head 10 bv cap screws 26, the cover being aperture to freely receive the shaft 15 therethrough. Preferably,`the cover is of suitable sheet metal.

Fitting over the forward end of the shaft 15 is a sleeve 27, and rigidly connecting the sleeve with the shaft is a taper pin 28. Appropriately fixed inthe forward end of the sleeve is a nut 29, and screwed through the nut is an adjusting rod 30 having a flattened forward terminal 31. Pivotally connected to the forward end portions of the bars 12 near the angles therein, are longitudinally curved toggle links 32 overlying the forward terminal 31 of the rod 30 at opposite sides thereof. and ivotally connecting the inner ends of said inks with said terminal is a bolt 33, the links being preferably provided with spaced openings 34 toV selectively accommodate said bolt so that the effective lengths of the links may be varied.

As will now be seen in view of the foregoing, by applying the crank 17 to the terminal 16 of the shaft 15 and rotating the crank in a counter-clockwise direction, the adjusting rod 30 may be shifted forwardly for swingingthe inner ends 0f the links 32 forwardly and collapsing the jack when, by grasping the head 10, the bars 12 of the jack may be shoved beneath a vehicle, as suggested in Figure 1, and positioned for engagement with the desired part of the vehicle such as the axle or spring. By then turning the crank 17 in the opposite direction, the rod 30 will be shifted rearwardly for rocking the toggle links and swinging the uppermost of the bars 12 upwardly to engage the saddle 14 with the vehicle, when continued rotation of the crank 17 will, as will be perceived. serve to effect the lifting of the adjacent wheel of the vehicle. Should it be found diflicult to raise the vehicle by turning the shaft 15 directly by means of the crank 17, said crank may be applied to miy the terminal 21 of the shaft 20 when, upon the operation of the crank, power will be applied to the shaft 15 through the

gears

23 and 24 with resultant easy operation of the crank, due to the ratio of the gears. As will be perceived, the jack is of such length that the jack may be readily positioned tbeneath the vehicle without the necessity of kneeling or crawling under the vehicle and may likewise be operated for lifting any one of the wheels of the vehicle withoutthe necessity for reaching under the vehicle or touching the vehicle, the operator beingpermitted to maintain nearly an upright posi- ,t

tion.

Having thus described the invention. what I claim' is:

1. A lifting jack comprising bars ivotedv at one end and having opposite en s bent laterally in opposite directions, toggle links connecting the laterally bent ends of the bars, a member pivoted at one end to the toggle links, and an auxiliary member rotatably mounted in the pivot connection of the said bars and having screw thread connection with the opposite end of the first mentioned member.

2. A lifting jack including ahead, coacting lifting bars pivoted thereon, one of said bars being provided with a foot and the otherv of said bars being provided with a saddle, toggle links pivotally connected near their outer ends to said bars, a rod pivotally connected to the inner end portions of said links, and a shaft rotatable 3. A lifting jack comprising a head provided with trunnions at opposite sides, bars mounted at one end on the trunnions and having their opposite ends bent laterally in opposite directions toggle links connecting the laterally bent ends of the bars, a rod pivoted at one end to the toggle links, a shaft mounted in the head, 4a member coupled to the shaft and havin screw thread connection with the other en of the said rod, and a second shaft mounted in the head and geared to the first mentioned shaft to admit of power being applied directly or indirectly thereto as required.

In testimony whereof I aix m signature. WILLIAM L. KNOWLES.1 [L s.]