USRE16050E

USRE16050E - A coepoea

Info

Publication number: USRE16050E
Authority: US
Publication date: 1925-04-21

Description

Reissued Apr. 21, 1925.

MAURICE F. BERNSON, F CANADIAN, TEXAS, ASSIGNOE, BY

ol-Flcl-z.`

HESNE ASSIGNMENTS,

'ro WALKER MANUFACTURING coMPANY, or RACINE, wIsooNsxN, A couronn- TION 0F WISCONSIN.

JACK.

Original No. 1,488,723, dated March 11, 1924, Serial No. 484,111,.1lled July 12, 1921. Application for reissue led December 17, 1924. Serial No. 756,626.

means for extending the same to ift or lower' the load. Another object of the invention is to provide the telescopic parts with screw threads l and to provide a rotary nut which engages one member with means for holding said -member against rotary .movement so that.

the rotation of the nut will move the same lon itudinally and means for permitting the U sai member to rotate at the ends of its longitudinal movement,'so that it willcause `the second member to move longitudinally while being held against rotary movement byj the load. I A still further object of the invention 1s to provide means for rotating the nut on both the upward and downward movement of the handle.

Another object of the invention is to make the handle in sections and each section so formedas to be capable of use as a tire tool.

This invention also consists in certain other features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described, illustrated in the' accompanying drawings and specifically `pointed out in the appended claims. Y

In describing my invention in detail, reference will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in which- Fig. 1 is a side view "of the jack in closed position, parts being shownin' section.

Fig. 2 isa view of the parts in extended position.

Fig. 3 is an enlarged sectional view ofthel standard. y

Fig. 4 is a section on lme 4-4 of Fig. l.

Figs. 5, 6 and 7 are detailed views.

5-5 of Fig. 4.

the other pair at the lower Inthese views l indicates the standard or body part of the jack which is preferably formed of two halves, suitably connected together. This standard is provided with a bore 2 which has its ends enlarged, as at 2. The bore has 4longitudinally extending grooves 2" formed 1n its wall which are arranged diametrically opposite each other and sloping shoulders connect the end'walls of the grooves with the enlarged ends of the bore. A base bottom of the standard and closes the lower end of the bore thereof. A rotary nut 4 is rotatably mounted in the upper end of the standard )by ,having its flange 4 engaging the annular groove 4 formed at the top of the standard. A screw threaded member 5 is normally seated in the bore and passes through the nut and a second screw threaded member 6 is normally seated in the member v5 and has its screw threads engaged by the plate 3 is connected with the interior screw threads 5 of member. This second member 6 carries the load supporting head 7 at its upper end, said head bein formed with the usual concave recess. pin 8 is transversely arranged in the lower part of member 5 and this pin has its ends projecting and lis adapted vto engagev the grooves 2 in the standard to movement of member 5, but when said pin is located in the enlargements 2 of the bore it will be free to turn with the member. As the pin leayes the groove it will engage the `inclined walls of the extensions 2 and will ride up these walls until it reaches the circular parts of the enlargements. It will be noted from Figs. 3 and 5 that these pairs of inclinedl walls leading from grooves 2"- to the circular enlargements 2 each extend throughout `half ofthe circumferencmof the bore, that is, one pair of inclined walls meets when cularenlargement 2. 2 In this way the rotation of nut 4 is reversed, the ends of pin 8 will engage with certain of these inclined` walls and be guided back into the grooves .2.

It will thus be seen that when the nut is pin '8 is in either enlargement of the bore with qthe nut and Fig. 5 is a section taken substantially on the line vbe causedl to move longitudinally by the screw threads 5 on member 5. If the pin 8 prevent rotary I ments.-

is in the grooves l2", however, member 5 will be held against rotary movement so that the rotation of the nut will cause said member 5 to move longitudinally until the pin leaves the grooves and enters one of the enlarge- The means a frame 9 pivotally secured to the standard and adapted to be rocked by a handle 10.

The pivots of this frame carry a pair of bevfeled gears formed on the nut.

11 which mesh with teeth 12 A pair of crescentshaped dogs 13 are pivotally mounted in the.

frame-and are adapted to engage with thel gears 11. Each dog is provided with a pair of rearwardly extending ears 14 between which is arranged a U-shaped spring 15 and which is suitably connected with the dog. The outer 4end of the frame is made. in the form of a socket 16 and a sleeve 17 is rotatably mounted in said socket. The inner end of this sleeve is provided with a 'pair `of arms 18 which taper towards their outer ends. These arms pass throu h slots 19 formed in the projections 2O o? the frame and which support the inner ends of the pivot pins of the dogs. The extreme ends of the arms 18 engage the U`shaped springs `15 so that when thesleeve 17 is partly ro- -3'0ftated in the socket said arms by their enagement with the spring 15 will cause the ogs to rock upon thelr pivots, one in one direction and the other in an opposite direction, so that the upper end of one dog will engage the teeth of one of the gears 11 while the lower end of the other dog will engage the teeth of the opposite gear. Thus the rocking movement of the frame will move one gear on Iits upward stroke andthe other gear` on its downward stroke and as these gears engage opposite si es of the nut, said nut will be moved on both strokes of the Yis frame. The spring 15 will permit the dogs to ratchet over the teeth of the gears when idling. p arms 18 and thesleeve 17.

The handle 10 is made in sections, eachV section having a'wedge-shaped end 10' which is adapted to engage a slot 10" in the enlarged end of the next section, a similar slot 17' being formed in the sleeve 17 for receiving the wedge-shaped end of the first section of the handle. By placing the wedge-shaped end of the first section in the slot in the sleeve and partly rotating it the dogs can be moved to place them in proper position to either raise thefjack or lower the same. It will be seen that the peculiar shape of the handle sections will.render them capable of being used as tire tools.

In operation, the jack is placed under the i part to be elevated, preferably with one of for rotating the nut compriseswretated inthe proper direction by manipu- Slots 19 limit the movement of theagainst rotation by the load supported thereon. If at this time sleeve 5 is partially elevated, so that the ends of pin 8 are in engagement with the grogves 2, sleeve 5 will thus be Iheld against rotation and will be elevated through gear 4, when gear 4 is lation of-the handle 10. There will at first be no relative rotation between the inner screw 6 and the screw'sleeve 5, and. these two screw members will move bodilyupward together, carrying the load which is sup-- ponted by the head 7. When sleeve 5 nears the upper limit of its travel, the ends of pin 8 will-run out into theenlargements 2 of the bore, wherein they can rotate, and will eventually come in contact with the lower face of gear 4, locking lthe sleeve 5 and gear 4 together to turn as a unit. The sleeve 5 now acts as a rotary nut withk inner threads 5', to further elevate the non-rotary screw G, and the lifting operation will be continued until .the load is sufiiciently elevated, or until both screws are completely extended.

On the other hand, if at the beginning of the elevating operation, sleeve 5 is "completely lowered with the ends of pin 8 in the lower enlargement 2', the sleeve 5 vmay at first turn with the gear 4, and elevate the screw 6, and the load carried thereby, until this inner. screw 6 is completely extended,

whereupon theslecve 5 will be held from tary gear 4. 'l` he ends of pin 8 will iinmedi atcly encounter thev inclined walls of the extensionl and be guided into grooves 2".- If the frictional resistance of screw 6 in threads 5 in sleeve 5 is greater than the resistance or' the threads on sleeve 5 in gear 4, the sleeve 5 will be held against rota-tion at' the start of the operation just described above suiiciently to cause the pin 8 to ride up the inclined extension into grooves 2', after which the operation is as first dcscribed. Y t

For the lowering operation, handle 10 is manipulated to cause rotation of gear 4 in vthe opposite direction, and an exactly reverse movement of the screws takes place. As long as the inner screw 6 is held against rotation bythe loa'd or other means, the screws 5 'and 6 will -be successively lowered to the desired extent, or until both are conipletely housed within the standard. As in the elevating operation, it is quite immaterial which screw is lowered first, -this cle-- pending upon the relative resistance to turnlng of the two screw and nut engaging portions. 't n From the above it will be apparent that when the parts are in closed position the jack'twill be small soas to take up but little rooni in the tool boxand also render it capable of being placedunder parts which are f of which are utilized tol impart movement'- 'close to the surface upon which the jack is seated. It will also be seen that the jack can -be extended to a'considerable extent so that it will raise the load to agreat hei ht and the movement of the parts is secure by the rocking movement of the frame, both strokes to the parts. v

AIt is thought from the foregoing 'description that the advanta es and novel features-.of my invention will be readily apparent.

I desire it to lbe understood that I may make changes in the construction and in the combination and arrangement of the sevl eral parts, provided that such changes fally within the scope of the appended claims. l

I claim: y 1. A jack of the class described comprising a standardhaving a bore therein and vertical grooves in the walls of the bore, ythe ends .of the bore being of larger diameter than the major portion thereof with sloping shoulders connecting the enlargements with the walls of the grooves, a nut rotatably connected vwith the top of the standard, a. screw threaded member located in the bore of theq'standa-rd and passing through the nut, a projection at the lower end of the 30member for engaging the grooves to prevent rotary movementof the member until the projection reaches the enlargements, ratchet meansfor rotatingathe nut, asecond screw l threaded member located in the tirst member and having screw threads thereon, the first member being interiorly screw threaded vto receive the second member and a sup-v porting head on the upper'end of the second member, Y I,

2. `A jack of the classdescribed comprising a standard formed of' two halves bolted together, a base bolted td the lower end of the standard, the upper end of the standard having an annular groove formed therein,

a nut having a ange thereon engaging the..

groove, said standard having a bore therein, the ends of which are enlarged and each half of the standard havinga longitudinally extending groove therein and sloping shoulders connecting the end walls of the grooves with the enlarged part of' the bore, a screw threaded member located in the bore and passing throughhe nut, a projection on the member for engaging the grooves to prevent rotary movementof the members until-the projectionv reaches enlargements, a second screw threaded member located in'the first member and said first member having screw threads lthereon for engaging the screw threads of the second-member, ratchet mechanism engaging the nut and a handle vtor actuating the ratchet mechanism.

3.' A. lifting jack' comprising a standard having a vertical bore and a vertical groove in the walls of the bore, the ends ofthe bore being of larger diameter than-the inainbore with sloping shoulders connecting the enlargements with the walls of the groove, a

nut rotatably supported at the top of the standard, means for rotating the nut, a screwthreaded member located in the bore ofthe standard and meshing within the nut,

a projection at the lower end of .the member for engaging the groove to prevent rotary movement of the member until `the projection reaches one of the enlargements, a second threaded member mountedwithinthe first member which is internally' threaded to receive the'second member, and a load supporting head on the second member.

4. A lifting jack comprising a standard having a vertical bore anda vertical groove lso in the Walls of the bore, one end of the bore being of larger diameter than the main bore with sloping shoulders connecting the enlargement with the Walls of the groove, a

nut rotatably supported at the top of the standard, means for rotating the n'ut, a screw-threaded member located in the bore of the standard and meshing within the nut, a projection at the lower end ofthe member' for engaging the groove to prevent notary movement of the member until the.- projection reaches the enlargement, a second threaded member mounted within the first memberwhich is internally threaded to receive the second member, and a load supx porting head on the second member. v

5. A lifting jack comprising a hollow standard, a rotatable interiorly threaded driving member mounted in the standard, an exteriorly threaded sleeve meshing vwithin, the driving. member and having an interiorly7 threaded nut inits upper portion, a load-supporting screw meshing within this nut,l and means lpositively preventing rota' tion of the sleeve throughout its longitudinal travel through the driving member irre'- spective of the load carried by the screw but permitting it t-o rotate with the driving member when at the upper ,limit of its travel. 6. A lifting ack comprising a hollow standard, a rotatable interiorly threaded driving member mounted in the standard,

an exteriorlx threaded sleeve meshing within the driving member and having an interiorly threaded nut-in its upper portion, a

screw meshing Within this nut, and means l positively preventing rotation of vthe -sleeve throughout itslongitudinal travel through .the driving member irrespective of the load carried by the screw but permittingit to ro.

tate with the driving member when at the lower limit of its travel.

A7. A lifting jack comprising a hollow standard, a' rotatable interiorly threaded .driving member mounted in the standard, van exteriorly thre 'ided sleeve meshing within the driving memberI and .having .an interiorly threaded nut in its upper portion, a 1,30

screw meshing within this nut, and means positively preventing rotation of the sleeve throughout its longitudinal -travel through the driving member irrespective of theload carried by the screw but permitting it to rotate with the driving member when at the upper and lower limits'of its travel.

8. A lifting jack comprising a' hollow standard, a rotatable interiorly threaded driving member mounted in the standard, an exteriorly threaded sleeve meshing within the driving member and having an interiorly threaded nut in its upper portion, a screwaneshing within this nut, and means positively preventing rotation of the sleeve throughout its longitudinal travel-through the driving member irrespectiveof the load carried by the screw but permitting it to rotate with the driving member when at the upper and lower limits of its travel, and means for locking the sleeve dto the driving member to turn therewith when at the limits of its vertical travel.

9. In a lifting jack, a vertically movable lifting member, means for raising and lowering the member, and guiding means posi- -tively preventing rotation of the member about its own axis while moving up' or down, and permitting rotation-.thereof only when at either the upper or lower limits of its travel. f

10. In a lifting jack, a vertically movable lifting member, means forraising and lowering the member, and guiding means positively preventing rotation of the member about its own axis while lmoving up or down, and permitting rotation thereof only when at the upper limit of its travel.

11. A lifting screw comprising a standard, a rotatable driving member, a pair of lifting. screws one nested within the other, the outer screw being threaded within the driving member, the inner screw moving bodily with the outer screw when the latter is being raised or lowered, and means for positively enforcing a vertical movement of the inner screw through the outer screw, when the outer screw is at the upper or lower limits of its movement and the inner screw is in engagement with a load. l

12. In a lifting jack, a hollow standard, a lifting member vertically movable through the standard, guiding means projecting from the lifting member, cooperating. guiding means in the standard for preventing rotation of the lifting membei` during its vertical movement through the standard, the guiding means in the standard terminating shortv of the upper and lower-.ends of thev standard whereby the lifting member is permitted to rotate when at the limits of its travel in either direction.

13. In a' lifting jack, a hollow standard, a lifting member vertically movable through the standard, guiding means projecting from inpho the lifting member, cooperating guiding means in the standard for preventing rotation of the lifting member-during its vertical movement through ,the standard, the guiding means in the standard terminating short of the upper and lower ends of the standard whereby the ,lifting member is permit-ted to rotate when at the limits of its travel in either direction, and means in each end of the standard directing the guiding means on the lifting member into engagement with the guiding means'in the standard when the direction of travel of the lifting member is reversed. Y l

14. In a lifting jack, a hollow standard, a lifting member vertically movable through the standard, guiding means projecting from` the lifting member, cooperating guiding nieansiin the standard for preventing rota-X tion of the lifting member during its vertical movement through the standard, the guiding means in the standard terminatingl shortl of the upper end of the standard whereby the lifting member is permitted `to rotate when completely elevated.

15. In a lifting jack, a hollow standard, a lifting member vertically movable through the standard, guiding means projectingfrom the lifting member, cooperating guiding means in the standard for preventing rotation of the lifting member during its ver- 'tical movement through the standard, .the

guiding means in the standard terminating l short of the upper end of the standard whereby the lifting member is permitted to rotate when completely elevated and means in the upper end of the standard for' directing the guiding means on the lifting member into engagement with the guiding means in the standard when the lifting member is lowered.

16. In a lifting jack, a hollow standard, a lifting member vertically movable through the standard, guiding means projecting from the lifting member, cooperating guid-v ing means in the standard for preventing rotationv ofthe lifting member during its vertical movement through `the standard, the guiding means in the standard terminating short of the lower end of the standard, whereby the lifting member is permit- ,ted to rotate when completely lowered, and' means in the lower end of the standard for directing the guiding means on the lifting member into engagement with the guiding means inthe standard when the lifting memberis again elevated.

17. In a lifting jack,a thebore of which is 'provided with a vertical guide slot communicatin with an enlarged portion of the bore a jacent the upper end of the, standard, aF lifting member vertically movable through the standard, and a pin extending from the lifting memberand moving in the -guide slot to prevent hollow standard, ,i

. rotation of the lifting member while moving vertically, but rotating freely 'in rthe enlarged portion .of the bore when the lifting member is 'completely elevated,

` 18. In` a lifting jack, a hollow standard, the bore of which is provided with a verti-` cal guide slot communicating with an enlarged portion of the bore adjacent the upper end of the standard, a lifting member vertically movable through the standard, a pin extending fromthe 'lifting member and moving in the guide' slot'to prevent rotation ofvthe lifting member while moving A vertically, but rotating freely in 4the enlarged portion of the bore when the lifting member is Icompletely elevated, and means within the vstandard for directingmhe pin intol the guiding slot when the lifting member is again lowered.

19. In a lifting jack, a hollow standard,

the'bore of whichis provided with a vertical guide slot communicating with an. en-v larged portion of the borel adjacent the lower end of the standard, a lifting member-vertically movable. through the standard, a pin extending from the lifting member and moving in the guidel slot fto'pi'e-v vent rotation of the lifting member while moving vertically` but rotating freely in the enl'arged portion of. the bore whenthel lifting member is completely lowered, and

' means within the standard for directing the pin into the guide slot when the' liftin member is again elevated.

20. In a lifting jack, a hollow standard, the bore of which is provided with a vertical ide slot `communicating with enlarged portions of the bore adjacent the upper and lower ends of the standard, a lifting mem-I ber vertically movable through the standard, a pin extending from the lifting member and moving in the guide slot to prevent rotation of the lifting member while moving vertically, the pin being adapted to rotate freely with the lifting member in the enlarged portions of the-.bore when the lifting member is completely raised or lowered.

21.. In a lifting jack, a hollow standard, the bore of\which is provided with a vertical guide slot communicating with enlarged portions of the vbore adjacent the upper and ower ends* of the standard, alifting member vertically movable throughpthe standard, a pin extending from the lifting member and moving in the guide slot to prevent rotation of the lifting member while moving vertically, the .pin being adapted to rotate freely with the lifting member inY the en; larged portions of the bore when the lifting member is completely raised or lowered and means within the 'standard for directf ing the pin into the guide slot when the lifti ing member is again moved vertically.

22; A lifting jack comprising a hollow standard, a rotatable interior-ly threaded an exteriorly threaded sleeve meshin .within the driving member and having an 'nteriorly threaded portion in its upper end, a screw meshing within this latter threaded portion and vadapted to carry the load to be lifted at its upper end, a pin projecting from vthe `lower portion of the sleeve, the bore of the standard having" a vertical slot in which the pin travels during the/vertical movement of the sleeve, there being an enlarged portion of the bore adjacent the upper end of the standardl in whlch the pin can freel rotate after leaving the slot whereby the sleeve may rotate with the driving member after being completely evated.

23. A lifting jack comprising `a hollow standard, a rotatable interiorly threaded driving membe mounted in -the.sr tandard, an exteriorly threaded sleeve meshing within the driving member and having aninteriorly threaded portionin its upper e'nd, a screw meshing within this latter threaded portion and, adapted to carry the( load to be lifted at its upper end. a pin projecting from thev lower portion of the sleeve, the bore of the j standard having a vertical slot in which the versely rotated to lower the sleeve.

24. A lifting jack comprising a hollow A standard, a vrotatable interiorly threaded driving member mounted in the standard, an exteriorly threaded sleeve meshing within the driving memberand having an interiorly threaded portion inits upper end, a screw meshing within this latter threaded portion and adapted to carry the load to be lifted at its upper end, a pin projectin from the lower portion of the sleeve, the ore of the standard havin pin travels during the vertical movement of the sleeve, there being an enlarged portion of the bore ad'acent the lower end of the a vertical slot in which the standard in which the pin can freely rotate after leaving the slot wherebyjthe sleeve may rotate with the driving member after being completely lowered.

25. A /lifting jack comprising a hollow standard, a rotatable interiorly threaded driving member'mounted in the standard, an exteriorly threaded sleeve meshing within the driving member and having an in- Vteriorly threaded portion in its upper end,

a screw meshing within this latter threaded y portion and adapted to carry the load to be lifted at its up er end, a pin projecting from the lower portion of the sleeve, the bore of 13 the standard having `a. vertical slot which l the pin travels during the vertical movement of the sleeve, there being an enlarged portion of the bore adjacent the lower end of the standard in which the pin can freely rotate after leaving the slot whereby the sleeve may rotate with the driving member after being completely lowered, and means within the standard for directing the pin back into the slot when the drivin member is re- A versely rotated to elevate t e s leeve.

26. A lifting jack comprising a hollow standard, a rotatable interiorly 'threaded driving member mounted in the standard, an exteriorly threaded sleeve meshing 'within 'the driving member and havingan interiorly threaded portionin its upper end, a'screw l meshing Within this latter threaded portion lstandard havin y pin ravels during the vertical movement of and adaptedto carrythe load to be lifted at its upper end, a pin projecting from the lower portion of the sleeve, the bore of the a vertical slot in which the the sleeve, the bore of the standardhaving enlarged portions adjacent the upper and lower ends of the S'tandard in which the pin "can vfreely rotate after leaving the guide slot, whereby the sleeve may rotate with the 'driving member when at either limit of its vertical 4movement. Y

27. A lifting jack comprising a hollow standard, a rotatable interiorly threaded driving member mounted in the standard, an exteriorly threaded sleeve meshing within the driving member and having an interiorly threaded portion in its upper end, a screw meshing within this latter threaded portion and adapted to carry. the load to be lifted` at its upper end, a pin projecting from the lower portion of the sleeve, the bore of the standard having a vertical slotin which the pin travels duri'ngthev vertical movement of the sleeve, the bore of the standard having enlarged portions adjacent'the upper and v .lower ends of the standard in which the pin can tfreely rotate afterv leaving the gluide slot, whereby the sleeve may' rotate wit the i driving member when at either limit of its vertical increment, and meanswithin the endsof the standard for directing the pin back into-the guide slot when the sleeve is again moved vertically in either direction.

MAURICE F. BERNSON.