US1400054A - Lifting-jack - Google Patents

Description

A. GUSTIANA.

LIFTING JACK.

APPLICATION FILED APR. 13, I921.

Patented Dec. 13.1921.

2 SHEETs-SHEET l- A. GUSTIANA.

LIFTING JACK.

APPLICATION FILED APR. 18. 1921.

Patented Dec. 13, 1921.

2 SHEETS-SHEET 2- CID . III

A N RM OT. m6 vw, NO H TI A w w UNITED "STATES PATENT OFFICE.

' ANTHONY GUSTIANA, 0F SUDBURY, ONTARIO, CANADA.

LIFTING-J'ACK.

Specification of Letters Patent. Patented D 13 192] Application filed April 18, 1921. Serial No. 462,124. a

To all 07mm it may concern:

Be it known that I, ANTHONY GUsTrANA, of the town of.Sudb11ry, in the-Province of Ontario, Canada, have invented certain new and useful Improvements in Lifting-Jacks.

My invention relates to improvements in lifting jacks and the object of the invention;

is to devise a ack which will have a maximum length of lift and yet such as will be compact to take up a minimum space when not in use and at the same time'to devise means wherebythe operation may be readily reversed without moving the hands from the operating lever and it consists essentially of the arrangement and construction of arts as hereinafter more particularly explained. Figure 1 is a sectional view through my 'ack. 1 Fig. 2 is a detail sectional view of'the operating parts of my j ack. shown in the position they assume during the lowering operation andwith the operating lever in the lowered position. I

Fig. 3 is a similar view to Fig. 2 showing the parts in the position they assume with the operating lever in the raised position.

Fig. 4 is a plan sectional detail on line- Fig. 5 is a sectional detail showing two portions of my lifting column and a means for locking .them together.

Fig. 6 is a sectional detail on line 66 Fi 1.

Fig. 7 is a detail v iew of the operating lever and handle. I

In the drawing like characters of reference indicate corresponding parts in each figure.

1 indicates a casing the body of which-iscircular and formed by two side walls 2 and 3 connected together by the wall 4. The bottom of the casing 1 is provided with an angular block portion 5 to provide a flat bottom for the casing when in the operative position on the ground. The casing 1 is provided with an opening 6 through which the lifting column is adapted to pass. 7 is a cross wall extending vertically from the inner side of the opening 6 to form a vertical guide through .which the lifting column is adapted to pass as will hereinafter 'be eX-' plained. Each wall 2 and 3 is provided with a groove 8 aportion of which is concentric to the center of the casing. The inner end.

of the groove 8 terminates adjacent to the vertical ,cross wall 7. The opposite end of the groove 8 extends vertically upward at the outslde of the wall 7 and is provided iniermgdiately of its length with an offset poron 10 is a lifting column which is formed bv a ser1es of sections 11, 12, 13, 14, 15, 16, and 17 hingedly connected one with the other as Wlll be clearly seen on referring to'Fig. 5. In this figure it .Will be seen that each. sectlon is provided with an end recess 18 and the next adjacent section with a lug l9 extendi'ng into such recess and through which and theside walls of the recess 18 extends a hinged pin 20. Each section is provided in one end with" a cross slot 21 WhlCh is curved concentrically to the center of the hinged pin 20. It will be noted also that the outer wall of each slot 21 is cut shorter than the inner wall. Each next adjacent section is provided with a cone the slots 26 into the grooves 8 formed in each side wall 2 and 3 of the casing 1. 29 is a locking pin extending from the locking member 27." and into the orifice 25. -In its normal or unlocked position the locking pin 29 extends only partially through the dividing wall formed between the recess 18 and the cross slot 21. In order tohold the locking member definitely in place I have provided a spring finger 30 having recesses 31 and 32 spaced apart and adapted to receive the sharp projection 33 extending from the locking member 27.

housing which is carried by the side walls.

'100' 31 is a of the casing 1 and by the block 5. 34. is

a slot formed in the housing 31* and through which the'operating lever hereinafter described passes. 35 is the operating lever of my jack provided at its inner 'end with a forked end 36. The operating lever 35 is pivotally mounted between the side walls of the housing-31 upon a pin 37. 38

is an operating pawl which is. pivotally mounted-upon a pin 39 between the arms of the jaw 36. The outer face of each section of the lifting column 10 is provided with a ratchet rack 40. When the sections of the lifting column are brought into longitudinal alinement the rack portions of each section form a continuous rack. 41 is a cross pin extending through the housing 31? above the operating lever 35. 42 is a pawl which is mounted upon the cross pin 41 and engages the rack 40 at a point above the pawl 38. The pawl 42 is pro videdwith a central slot 43 for a purpose which will hereinafter appear. 44 are spring fingers which are rigidly connected to or formed integral with the pawl 42. The fingers 44 extend downward in a curved direction at each side of the operating lever 35 and then upward into contact with the outer face of the upper portion of the block 5. 45 is a cross bar carried by the fingers 44 below the operating lever 35. 46 is a cross pin extending through the housing 31 above the cross pin 41 and slightly to the outside thereof. 47 is a rocking member carriedby the cross pin 46 and provided with an upwardly extending arm48 to which are secured curved springs 49 and 50. The spring 50 curves inward toward the lifting column 10 and at a point adjacent thereto curves downward to the lifting pawl 38. The lower end of the spring 50 is provided with an outturned portion or enlargement 51 to form a stop. 52 is a right angular lug extending upward from the pawl 38 and provided with an orifice through which the downward curved portion of the spring 50 passes for a purpose which will hereinafter appear. The upper end of the spring 49 is secured to a cross pin 531 secured to the side walls of the hous- 1 3 v iiied with a depending tongue 54 which inclinesnormally slightly inward. .55 is a tubular handle for the operatin lever 35. The inner end of the handle 55 15 provided with projecting portions 56 and 57 extending therefrom at diametrically opposite points. The handle 55 is provided with a slot 58 into which extends a pin 59 carried by the operating lever 35. The upper pawl 42 is provided with an upward extension or finger 60. 61 is a short shaft extending through the wall of the housing 31 and provided at its inner end with a finger 62 adaptedto engage the finger 60 and at its outer end with an operating handle 63.

Having described the principal parts involved in my invention, I will briefly describe the operation of the same.

The parts as shown in Fig. 1 are arranged for raising the lifting column so as to lift the vehicle or other object desired. After placing the jack in position with the lifting The rocking member 47 is procolumn beneath the part of the vehicle or other object with which it is to engage, I swing the operating lever in a vertical plane thereby carrying the pawl 38 downwardl during the upward movement of the handle 55 to engage a new tooth. When the pawl 38 has engaged the new tooth the handle 55 is swung in the opposite direction so as to force the lifting column upward. During this operation the pawl 42 merely rides over the teeth of the rack 40 passing into engagement with each tooth by means of the spring 44, so as to lock the column after each upward movement and to allow for the return movement of the operating lever. It will be noted that during this operation the movement of the operating lever is not sufficient to carry it into engagement either with the cross bar 45 or with the tongue 54. When it is desired to lower the jack I turn the handle 55 a quarter turn so that the projections 56 and 57 are carried from a horizontal position to a vertical position between the cross bar 45 and the tongue 54. I then depress the handle 55 to carry the lower projection 57 into engagement with the cross bar 45. By continuing the downward pressure the spring finger 44 is compressed against. the block 5 exerting a tension upon the pawl 42 forcing it into the position indicated in Fig. 2. The operating handle 55 is then raised, carrying'the pawl 38 downward and allow ing the lifting column 10 to operatesufliciently to allow the uppenpawl 42 to engage with the next succeeding tooth. When the operating lever nearlyreaches the limit of its upward stroke or in other words when the lifting column has dropped almost to the limit of-its movement the projection 56 engages the tongue 54 forcing such tongue inward and exerting a pull upon the curved spring 50. It will be noted that during the downward movement, of the pawl 38 the spring 50 passesthrough the orifice of the lug 52 carrying the enlarged or turned end 51 of the spring 50 into engagement with such lug. It will therefore be seen that as soon as the lug 56 engages the tongue 54 the tension'exerted .thereby on the spring 50 is sufficient to pull the pawl 38 out of engagement with the rack. When this action takes place the lifting column drops until the upper pawl 42 has fully entered the succeeding tooth with which it had been carried into engagement bythe preceding operation. In order that the sections of the lifting column may be automatically locked. together to form a solid column as they come to a vertically alined position, I have provided the locking pin 29 and the parts co-acting therewith the use of which I willv now describe.

As each section travels upward through the I forced in an outward direction.

vertical portions of the grooves 8 toward the offset portions 9. When the pin projections have reached this position two adjacent sections which have entered the aforesaid channel are brought into vertical alinement or into a position where the cross lugs 22 fit completely into the recesses 21. When the lugs 22 are in this position the orifice 24 is in horizontal alinement with the orifice 25. When the orifices are in thisvposition the pin projections enterthe oflset portions andare This operation forces the locking pin 29 also outward so as to enter the orifice 24 looking the parts together. Simultaneously with this operation the projection 33 passes from the recess 31 into the recess 32 so as to definitely hold the locking pin in the locking position. When the jack is operated to lower the lift- ,ing columnthe reverse of this operation of course takes place, that is to say the pin projections 28 are forced in the opposite direction to withdraw the locking pin from the orifice 24 and at the same time carry the projection 33 to the recess 31 thereby holding the locking pin definitely in the withdrawn position. As the locking pin is withdrawn the sections will swing freely upon their hinge pins 20 so as to follow the curve,

of the casing 1 and thereby assume a. compact position. It will of course be understood that if desired the casing 1 might be extended horizontally instead of curving upward so as to accommodate a greater len th of column and thereby increase the lifting capacity of the column. If it is desired to drop the load all it isnecessary to do is topress upon the handle 63 so as to force the fingers 62 into contact with the finger 60, to draw the pawl 42 out of engagement with the rack. The pawl 38 of course may be withdrawn simply by raising the operating .lever to the upper positlon.

From this description it will be seen that I have devised a very simple form of jack which will beextremely compact and will allow of raising the object to be lifted to a far greater height than would otherwise be tions hingedly connected together so as to fit in longitudinal alinement within the vertical channel and to fold on their hinged joints within the casing, a ratchet rack forming the outer face of each section, an operating lever pivotally mounted within thecasing, a lower pawl pivotally carried by the leverand engaging the. rack of the column, spring means for holding the upper pawl in engagement with the rack, and means for automatically locking the segments together .as they are drawn lnto longitudinalal-inement within the aforesaid channel.

2. A lifting jack comprising a casing 7.

section, means for automatically locking the segments together as they are drawn into longitudinal alinement, an operating lever mounted within the casing, a pawl carried by the lever and engaging the ratchet rack,

and a spring held pawl mounted within'the casing also engaging the ratchet rack.

3. A lifting jack comprising a casing adapted to rest upon the ground and having an upwardly presented orifice and a vertical channel extending from such orifice into the casing-and having opposing grooves in the walls thereof extending vertically at each side of the aforesaid channel and having an offset therein and curving longitudinally at each side of the casing, a lifting column having a recess in its inner face and opposing cross slots in the side walls thereof and an orifice extending through the inner wallof' the recess, a hinged connection between each of the sections, a lug carried by the end of each section next adjacent to the aforesaid recess and having an orifice there 1n adapted to be brought into a line with the aforesaid .orifice when the sections are car-"- ried into longitudinal alinement, a cross piece fitting 1nto each recess of each section and having pin projections extending into the cross slots of the sections and into the opposing grooves of the casing, a locking pin extending from the cross piece into the orifice'of the recess wall adapted to be forced into the orifice of the lug whenthe -comprising a series of sections each section sections are brought into longitudinal alinementand the pin projections into the offset portions of the opposing grooves of the caS-' mg, an operating lever pivotally mounted within the casing, and-means operated thereby for drawing the sections successively from the casing into the vertical channel.

4. A lifting jack comprising a casing adapted to rest upon the ground and having an upwardly presented orifice and a channel extending inwardly from such. orifice and a oove formed in each side Wall of the casing and extending vertically at each side of the channel and havin an offset portion therein and the inner en curvinghorijection extending from each end of the cross piece into the grooves of the casing, and means carried by the cross piece adapted to engage with the cross lug of the next adjacent section as the pin projections enter the offset portions of the grooves and means for imparting a step by step movement to the lifting column to carry the sections successively from the casing into longitudinal alinement within the channel.

5. A lifting jack comprising a casing having an upwardly presented orifice and a vertical channel extending inwardly from such orifice, a lifting column comprising a series of sections hingedly' connected together and adapted to fit within the casing and successively enter the channel, a ratchet forming the outer face of each section, an operating lever pivoted within the casing, a pawl carried by the operating lever engaging the ratchet rack of the lifting column, a pawl carried by the casingland spring held in engagement with the ratchet rack of the lifting column and adjustable means carried by the operating lever and co-Iacting means carried by 'the casing for drawing the pawls alternately out of engagement with the rack to permit of a lowering movement; 7

6. A lifting jack comprising a casing having an upwardly presented orifice and a vertical channel leading inwardly therefrom, a lifting column comprising a series of sectionshingedly connected together, a ratchet rack forming the outer face of each section, an operating lever mounted upon the casing, a pawl carried by the lever and engaging the ratchet rack, a holding pawl mounted upon the casing and also engaging the ratchet rack, curved spring fingers depending from the lower end of theholding pawl and havin their curved ends bearing against a sultable portion of the casing, a rocking member mounted upon the casing, a tension spring carried by the rocking member and slidably extending through a suitable portion of the pawl of the operating lever and adjustable means carried by the operating lever adapted whenlowered to compress the spring fingers of the holding pawl to withdraw such pawl out of engagement with the rack and when raised to rock the rocking member to withdraw the pawl of the opelrating lever out of engagement with the rac z.

T. A lifting jack comprising a casing having an upwardly presented orifice and a vertical channel leading inwardly therefrom, a lifting column comprising a series of sections hingedly connected together, a ratchet rack forming the outer face of each section, an operating lever mounted upon the casing, a pawl carried by the lever and engaging the ratchet rack, a holding pawl mounted upon the casing and also engaging the ratchet rack, curved fingers depending from the lower end of the holding pawl and havin their curved ends bearing against a suitab e portion of the casing, a rocking member mounted upon the casing, a tension spring carried by the rocking member and slidably extending through a suitable portion of the pawl of the operating lever and having a stop portion at its end, a projection carried by the spring fingers of the holding pawl and a projection carried by the rocking member, a pin extending from the operating lever, a tubular handle for the lever having an are shaped slot into which the pin extends and diametrically opposite projections extendingfrom the inner end of the handle adapted to be interposed between the projections of the spring fingers, of the holding pawl and the projection of the rocking member to alternatelycompress the spring fingers of the holding pawl and to draw into tension the spring of the rocking member when the operating lever is alternately lowered and raised.

8. A lifting jack comprising a casing having an upwardly presented exit orifice, a vertical guide way located within the casing, a normally flexible lifting column extending at its upper end into theguide way and laterally therefrom at its lower end, an operating lever for forcing the column vertically, a turnable handle therefor, and means controlled by the turning of the handle on the lever for changing the direction of the movement of the lifting column.

ANTHONY GUSTIANA.

Images