US1394375A

US1394375A - Jack

Info

Publication number: US1394375A
Application number: US407748A
Authority: US
Inventors: Torkildson Torl
Original assignee: Individual
Current assignee: Individual
Priority date: 1920-09-02
Filing date: 1920-09-02
Publication date: 1921-10-18
Anticipated expiration: 1938-10-18

Description

T. TOHKILSN.

JACK.

APPLICATION FILED sPL 2, 1920.

` 1,394,3755 Pat-@md @en Q W 2mm! 75H1. TOR/fu. D50/V UNITED STATES TORI.. TORKILDSON, OF LAKE CITY, SOUTH DAKOTA.

JACK.

Specification of Letters Patent.

Patented Oct. 18, 1921.

Application filed September 2, 1920. Serial No. 407,748.

To all whom t may concern.'

Be it known that I, Toni. TonKILDsoN, a citizen of the United States, residing at Lake City, in the county of Marshall and State of South Dakota, have invented certain new and useful Improvements in Jacks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. Y

The present invention relates to jacks, and more especially to such devices intended for automobiles and other vehicles, and aims to provide a novel and improved jack for quickly and conveniently jacking up the axle of the vehicle or the like.

It is an obj ect of the invention to provide a jack comprising substantially horizontal rock shafts and means carried thereby and operable for raising the vehicle or other ob` ject, in combination with means for turning one of said shafts to supply the power manually in a convenient and simple manner.

A further object of the invention is the provision of such a device including a rotatable shaft for operating the jack, a hand lever, and a ratchet device connecting said lever and shaft for applying the power.

A still further object is the provision of novel means for releasing the ratchet device from the hand lever to enable the vehicle or other object to be lowered conveniently.

With the foregoing and other objects in view, which will be apparent as the description proceeds, the invention resides in the construction and arrangement of parts hereinafter described and claimed, it being .understood that changes can bey made within the scope of what is claimed without departing from the spirit of the invention.

The invention is illustrated in the accompanying drawings, wherein Figure 1 is a perspective view of the improved jack, portions being broken away.

Fig. 2 is a side elevation thereof, portions beingfbroken away.

Fig. 3 is a fragmental detail view, on an enlarged scale, of the ratchet device.

Fig. 4, is a detail view showing the cam returning spring.

The frame or base 7 of the jack, as shown, is of triangular form, being wide at its forward end and tapering to a Vnarrow rear end, and this frame or base is rendered portable, so that it can be readily moved about on the floor. Thus, the frame is supported at its forward corners on casters 8, and at its rear end or corner on the caster 9.

The elevating or lifting means includes a transverse rock shaft 10 journaled at its ends Vsaid bars are provided at their upper ends with forwardly extending seats 141 for the vehicle aXle or other obj ect. In order to pro` vide a parallelogram movement of the elevating or lifting means, a second rock shaft 15 is disposed above and parallel with the shaft 10, and its end portions are journaled in bearings 16 supported by brackets 17 secured to the side members and forward `cross piece of the frame. The shaft 15 has forwardly extending arms 18 above the lower forwardly projecting arms of the levers l2, and pivotally connected to the upper ends of the hars 13, whereby said bars 13 are maintained in vertical position, and providing a parallelogram movement. V

The actuating means includes a transverse shaft 19 journaled in bearings 20 secured on the side members of the frame in rear of the shafts 10 and A15, and upwardlyextending arms 19 are secured to the ends of the shaft 19 and are connected by links or lbars 21 with the upwardly-extending arms of the levers 12 below the rock shaft 16. Thus, the

shafts

19 and 10 will rock or oscillate simultaneously while the rock shaft 15 will maintain the parallel vertical mo-` tion of the lift bars 13.,

A ratchet wheel 22 is `secured in any suitable manner on the shaft 19 withinthe frame and a hand lever` 23 of any suitable length has its lower end bifurcated to straddle said ratchet wheel, and provided with bearings 24 rotatable on the hub of the ratchet wheel so that said lever turns around said shaft 19. .a pressed pawl or dog 26y is carried bv the `lever 23 to engage the teeth of the ratchet wheel, and whereby to turn said ratchet wheel with the lever 23, when said lever is swung rearwardly and downwardly by the operator, and by pulling the links 21 rearwardly with the arms 19', and thereby swing the levers 12 for raising the lift bars 13, in jacking up a vehicle or other object under A suitable spring-` which the frame has been moved, as will be readily understood.

The reverse motion of the ratchet wheel 22 and lifting means is prevented by means of a pawl or dog 29 engaging the ratchet wheel and pivotally mounted on a cross piece 30 of the frame, thereby supporting' V Vleasing lever 31 is fulcrumed at one end to the cross piece and extends across the edge of the pawl 29, said lever 31 being of angular form so that its free end projects toward the shaft 19. This lever 31 can be swung to contact with the pawl 29 and swingy Vsaid pawl away from the ratchet wheel,

thereby releasing the ratchet wheel for reverse rotation to enable the bars 13 to move downwardly. The lever 31 is operated from the handle 25 of the lever 23, and, for this purpose, one bearing 24 of the lever 23 has a sleeve.32 on the vshaft 19. on which a rotatable ring; 33 is mounted and a second ring 34 is also mounted .on said sleeve with Athe ring 33 between the ring 34 and bearing` 24, and the ring 34 is feathered on the sleeve to slide longitudinallythereon butnot turn v with respect to said sleeve. The adjacent confronting faces of the rings have an annular series of cams 34 fitting one another, and the free end of the lever 31 contacts with the outer face of the ring 34. The ring has an ear 35 connected by a link or rod 33 with a lever 37 carried by the lever 23 adjacent to the handle 25, whereby the lever 37 can be grasped by the hand and swung toward the handle 25, for turning the ring 33 on the sleeve 32, thereby moving the ring 34 by cam action away from the ratchet wheel 22, and swinging the lever 31 to disengage the pawl 29 from the ratchet wheel. A coiled expansion spring 38 is confined between the ring 34 and the corresponding bearing 20, and a retractile spring 39 connects the arm or'ear 35 and an arm 40 on the ring 40 whereby to Vmove the ring 34 towardV the ratchet wheel 22, and enable thev pawl 29 to again engage the ratchet wheel 22, and to return the ring 32 to normal position. lt is to be noted that the

rings

33 and 34 being mounted on the sleeve 32 will remain in proper operative position with respect to the lever 23 'in the various positions of said lever, so that the pawl 29 can be releasedin any position of the hand lever 23. rEhe pawl or dog 26 is also preferably connected by alink or rod 27 with a lever 28 pivoted to the hand lever 23 adjacent to the handle 25, whereby the lever 28 can be grasped by the hand for disengaging the pawl 26 from the ratchet wheel when desired. Thus, both levers 28 and 37 can be grasped simultaneously, to release both pawls or dogs at once, whereby the vehicle or object will gravitate and return the lifting means and ratchet wheel to initial position. 4 Y

The bars or links 21 are also preferably bent, as shown, to pass over the shaft. 19 to or near dead center position Vwhen they are moved to their extreme rear positions, and thereby limit the movement and also take the strain ofi' ofthe ratchet wheel and. pawl 29.

Having thus described the invention, what is claimed as new is 1. A jack comprising a pa-irV ofsubstantially horizontal rock shafts, one above the other, arms extending fromsaidfshafts, a

vertical lift bar pivotedv to said arms to be raised and lowered with sa-idarms by a parallelogram movement, and actuating means connected to one of said shafts for rocking same. Y

2. A jack comprising a pair of substantially horizontal rock shafts, one above the other, a crank lever carried by the lowerV shaft` having an arm extending upwardly and another arm extending at an angle with said arm, an arm extending from the upper shaft above the second named arm of the lower shaft, a substantially vertical lift bar pivotally connected to the second named arm of the lower shaft and the arm of the upper shaft to be raised and lowered with said arms, and-actuating means loca-ted at one side of said shafts and connected to the first named arm of the lower shaft.

3. A jack comprising a frame, a pair of rock shafts carried by the frame in a'substantially horizontal position one above the other, bell crank levers carried by the lower shaft having upwardly extending arms and other arms extending at an angle therewith,

rio

the upper shaft having arms extending therefrom above the second named arms of the lower shaft, substantially vertical lift bars pivotally connectedto the second named arms of the lowersha'ft andthe arms-of the upper shaft to move upwardly and downwardly therewith, a third shaft mounted on the frame at one side of the aforesaid shafts, upwardly extending arms carriedby ratchet Wheel, a second pawl to engage the ratchet Wheel to prevent reverse rotation thereof, a lever arranged for dsengaging the second pawl from the ratchet Wheel, said hand lever having a sleeve on the shaft, a pair of coperating cam rings on said sleeve, one to slide longitudinally on the sleeve and the other to turn for sliding said slidable ring on the sleeve, the second named lever being arranged to be swung by said slidable ring for disengaging the second paWl from the ratchet Wheel, and means carried by the hand lever and connected to the second named ring for turning same.

5. A jack comprising lifting means, a ratchet Wheel operatively connected to said lifting means, a hand lever mounted to swing with and relatively to said ratchet Wheel, va pawl carried by the hand lever to engage the ratchet Wheel, a second pavvl to engage the ratchet Wheel for preventing reverse rotation thereof, and means arranged and operable from hand lever in any position of said lever for disengaging the pawls from the ratchet Wheel.

6. A jack comprising lifting means, a paWl carried by said hand lever to engage the ratchet Wheel, a second pawl not carried by the hand lever to engage the ratchet Wheel for preventing reverse rotation there-A and relatively to said ratchet Wheel, a paWlY carried by the hand lever to engage the ratchet Wheel, a second pawl to engage the ratchet Wheel and prevent reverse rotation thereof, a ring arranged to turn with said lever and slidable relatively thereto, means carried by the hand lever for sliding said ring in any position of said lever, means operated by the sliding movement of said ring for disengaging the second paWl from the ratchet Wheel, and spring means :for returning said ring to initial position.

In testimony whereof I have signed my name to this specication in the presence of two subscribing Witnesses.

TORL TORKILDSGN.