US2418443A - Jack - Google Patents

Description

April 1947- v A. W.'A. WIESNER 2,418,443

JACK

Filed Nov. 10, 194-4 3 Sheets-Sheet l Inventor F I 5, 2 42 77/? mm. W/[S/VEQ y M WWW Em April 1, 1947. A. w. A. WIESNER JACK Filed Nov. 10, 1944 3 Sheets-Sheet 2 Inventor QT/ll/Q WA. W/ESNEQ By imam-2a. m

April 1, 1947. A. w. A. WIESNER JACK 3 Sheets-Sheet 5 Filed Nov. 10, 194-4 Inventor ,4/2' 71/02 m4. W/[JNER Patented Apr. 1, 1947 UNITED STATES PATENT OFFICE JACK Arthur W. A. Wiesner, Cameron, Wis.

Application November 10, 1944, Serial No. 562,813

1 Claim. 1

The present invention relates to new and useful improvements in movable jacks and has for its primary object to provide an apparatus of this character comprising novel means for facilitating the removal and replacement of automobile transmissions, differentials, etc.

Another very important object of the inven tion is to provide a jack of the aforementioned character which is adapted to function as a stand for supporting the transmission or differential while it is being worked on.

Other objects of the invention are to provide a jack of the character described which will be comparatively simple in construction, strong, durable, highly efficient and reliable in use, compact,

light in weight, and which may be manufactured at low cost.

All of the foregoing, and still further objects and advantages of the invention will become apparent from a study of the following specification taken in connection with the accompanying drawing wherein like characters of reference designate corresponding parts throughout the several views, and wherein:

Figure 1 is a perspective view showing a jack constructed in accordance with the first invention in raised position.

Figure 2 is a perspective view showing the device in lowered position.

Figure 3 is a view in transverse section, taken substantially on the'line 3-3 of Figure 1.

Figure 4 is a fragmentary view in longitudinal section, taken substantially on the line 44 of Figure 3.

Figure 5 is a plan view of the forward portion of the device.

Figure 6 is a view in rear elevation of the front wheel.

Figure '7 is a fragmentary view in vertical section through an upper portion of the stand.

Figure 8 is a detail view in section, taken substantially on the line 8-8 of Figure 5.

Referring now to the drawing in detail, it will be seen that the embodiment of the invention which has been illustrated comprises a substantially triangular metallic frame which is designated generally by reference character I. The frame I includes a transverse back member 2 and a pair of forwardly converging bars 3. Rearwardly projecting arms 4 are fixed on the rear corner portions of the frame I. Wheels 5 are mounted on the arms 4.

A caster wheel 6 supports the forward end of the frame I. The wheel 6 is journaled in a yoke 1 (see Figure 6) from which a post or shank 8 rises. The post 8 is journaled in a suitable bearing 9 which is provided therefor on a plate ID on the forward end portion of the frame I. The upper end portion of the post 8 is slotted to provide bifurcations between which a tongue 4 I is pivotally secured by a pin I2.

Fixed on the member 2 of the frame I is a tube I3 (see Figure 4) A shaft I4 is journaled in the tube I3. Fixed on the end portions of the shaft I4 are the rear legs I5 of a vertically foldable stand which is designated generally by reference character I 6.

The stand I6 further includes a pair of vertically swinging front legs I! which are pivotally secured on members I8 on the frame I. A substantially U-shaped frame I9 is pivotally mounted on the free end portions of the legs I5 and I1, said frame I9 comprising braces 20.

The stand l6 further includes a work rest 2| which is mounted for vertical swinging movement in the frame I9. The work rest 2| comprises a pair of longitudinal side members 22 between which a cross member 23 extends. An upstanding bracket 24 is adjustably mounted on the member 23. The bracket 24 includes a horizontal base 25 which is secured by a clamp 26 beneath the member 23. A vertical slot 21 is provided in the bracket 24 to facilitate securing the work thereto.

Laterally projecting trunnions 28 are fixed on intermediate portions of the members 22 and are journaled in the adjacent end portions of the legs is and the frame I9, thus pivotally connecting said legs and said frame in addition to rockably mounting the work rest 2| thereon. Fixed on one of the trunnions 28 is a forked arm 29. A longitudinally adjustable rod 30 has one end portion pivotally connected at 3| to a bracket 32 on the member 2 of the frame I and its other end port on pivotally connected at 33 to the forked arm 29 for maintaining the work rest 2! in a substantially horizontal position as the stand I6 is raised and lowered.

Mounted on the forward end portion of the frame I is a jack 34 for raising and lowering the stand I5. In the embodiment shown, the jack 34 includes a housing 35 which is mounted for vertical swinging movement on the frame I. For this purpose, the housing 35 has fixed thereon a laterally projecting shaft 36 which is ournaled in a tubular :bearing 3! which is provided therefor on the frame I. A screw shaft 38 is operable in the housing 35. A head 39 on one end of the screw shaft 38 abuts a reenforcing bar 40 which is provided therefor .on an intermediate portion of the frame 19. The jack 34 further includes an operating crank 4| which is operatively connected to th screw shaft 38 by means including beveled gears 42.

It is thought that the operation of the device will be readily apparent from a consideration of the foregoing. Briefly, if a transmission, for example, is to be removed from a. motor vehicle, the work rest 2| is positioned beneath said transmission. The jack 34 is then actuated to swing the stand l5 upwardly and rearwardly. The device is maneuvered as may be necessary to properly engage the rest 21 beneath the transmission and said transmission is then bolted to the bracket 24 by which it is retained on the members 22. The jack 34 is then reversed to permit the stand I6, with the transmission thereon, to swing forwardly and downwardly by gravity. The device with the transmission thereon may then be removed from beneath the vehicle. The stand 16 may then be again raised to any desired elevation and the transmission may be conveniently worked on without the necessity of removing same from said stand. As hereinbefore indicated, the rod 30 maintains the work rest 2| in a substantially horizontal position at all times.

It is believed that the many advantages of a jack constructed in accordance with the present invention will be readily understood, and although a preferred embodiment of the device is as illustrated and described, it is to be understood that changes in the details of construction and in the combination and arrangement of parts may be resorted to which will fall within the scope of the invention as claimed.

What is claimed is:

A devic of the character described comprising a wheel-supported stand, a foldable frame mounted on the stand, said frame including pairs of front and rear legs pivotally mounted for vertical swinging movement on the frame and a substantially U-shaped member pivotally mounted on saidlegs, a work rest including trunnions journaled in said U-shaped member and in certain of the legs rockably supporting said work rest in said member, an arm fixed on one of the trunnions, a rod pivotally connected to said stand and to said arm for maintaining the work rest in a substantially horizontal position when the stand is raised and lowered, and means for raising andlowering the stand.

ARTHUR W. A. WIESNER.

REFERENCES CITED The following references are of record in the file of this patent:

' UNITED STATES PATENTS French Mar. '19, 1930

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