US1071213A - Lifting-jack. - Google Patents

Lifting-jack. Download PDF

Info

Publication number
US1071213A
US1071213A US66079411A US1911660794A US1071213A US 1071213 A US1071213 A US 1071213A US 66079411 A US66079411 A US 66079411A US 1911660794 A US1911660794 A US 1911660794A US 1071213 A US1071213 A US 1071213A
Authority
US
United States
Prior art keywords
jack
screw
members
lifting
nut
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US66079411A
Inventor
Charles L Crabb
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TOPPING BROTHERS
Original Assignee
TOPPING BROTHERS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TOPPING BROTHERS filed Critical TOPPING BROTHERS
Priority to US66079411A priority Critical patent/US1071213A/en
Application granted granted Critical
Publication of US1071213A publication Critical patent/US1071213A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F3/00—Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/08—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated
    • B66F3/16—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated actuated through bevel-wheel gearings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19642—Directly cooperating gears
    • Y10T74/19698—Spiral
    • Y10T74/19702—Screw and nut
    • Y10T74/19707—Plural longitudinally variably spaced nuts

Definitions

  • This invention relates to an improvement in lifting jacks and has for its object to provide a device in which an oppositely threaded double lifting screw is rovided whereby each turn of the screw will lift the intermediate member of the jack a predetermined distance above the lower member or base. and, at the same time, will lift the up r member of the jack a predetermined istance with respect to the intermediate member thus lifting the upper member away from the lower member or base-a distance the sum of the movements of the intermediate and upper members.
  • a further object is to provide a jack of the above character which will be very simple in construction, easy to operate, strong and durable, and in which the operating parts are completely inclosed and protected in all positions of the jack.
  • FIG. 1 A practical embodiment of my invention is represented in the accompanying drawin s, in -which igure 1 represents the lifting jack in to plan, Fig. 2 is a side view of the same wit osition, Fig. 3 is a section taken in the p ane of the line A-A of Fig. 2, looking in the direction of the arrows, Fig. 4 is a transverse section taken in the plane of the line BB of Fig. 3, looking in the direction of the arrows, and Fig. 5 is a section similar to Fig. 3, with the intermediate and upper members raised a distaiice away from the lower memher or base.
  • the lower member or base of the jack is denoted by 1, the intermediate member by 2 and the upper member by 3. These three members are hollow and are arranged to telescope one within the other.
  • the lower member 1 is provided with a nut 4 arranged to receive the lower screw threaded portion 5 of an oppositely threaded double screw 6.
  • a bevel gear 7 is locked to the central portion of the double screw 6 within the u per ortion of the intermediate member 2 o the 1ack, in the present instance by providing a pin 9 passing through the screw and the hub of the said gear.
  • This bevel gear 7 is plished 1n the provided with a shoulder 10 between which and the removable top 11 of the intermediate member 2 is interposed an antifriction bearing 8, for eliminating friction as far as possible at this point.
  • a horizontal shaft 12 is provided with a bevel gear 13 which meshes with the bevel gear 7 within the intermediate member 2.
  • This shaft 12 is mounted in suitable bear- ,ings in a plate 14 secured to the intermediate member 2.
  • a crank handle may be attached to the shaft 12 i for rotating the same to raise and lower the jack.
  • the upper portion 15 of the double screw 6 is threaded oppositely from the lower portion 5. This upper screw threaded portion 15 engages the travelingnut 17, which nut is provided with oppositely arranged lugs 18,
  • Anti-friction bearings are interposed between the upper member and the traveling nut, as follows :An annular row of balls 22 is interposed between upper and intermediate bearing plates 24, 25, and another annular row of balls 23 is interposed between the intermediate and lower bearing plates 25, 16.
  • the intermediate bearing plate 25 is made to turn with the double screw 6 so as to insure a rolling action of the balls between the upper, lower and intermediate bearing plates, and thereby distribute the load evenly on the traveling nut 17, so as to absolutely prevent the nut from cramping on the screw 6.
  • the upper member 3 of the jack is provided with a shoulder 26 having an extended engagement with the upper bearing plate 24 so as to give great strength and rigidity to the jack when in its raised position.
  • the upper member 3 is cut away along one side to permit its movement relative to the intermediate member 2 and a shield 27 uprises from the top 11 of the intermediate member in position to close the 0 ening which would: otherwise be formed y the separation of the upper and intermediate members.
  • a screw 28 serves as a stop to prevent the upper member 3 from being separated unintentionally from the traveling nut 7 and another screw 29 is carried by the upper member in position to engage a shoulder or abutment 30 on the intermediate member to serve as a stop for limiting the movement of the upper member away from the intermediate and prevent the entire separation of the three members.
  • Oil is supplied to the screw threaded connections between the several parts, by providing a longitudinal duct 31 leading downwardly from the top of the screw, said duct having outlets where the screw passes through the nut 4 and the traveling nut 17.
  • This duct may be packed with a wick so as to feed the oil in small quantities only.
  • the intermediate member 2 In operation, as the oppositely threaded double screw 6 is turned by the rotation of the shaft 12 to lift the jack, the intermediate member 2 will be lifted a certain distance with respect to the lower member 1 by the engagement of the lower screw threaded portion 5 with the nut 4. At the same time, the upper member 3 will be lifted a proportionate distance with respect to the intermediate member 2 by the engagement of the upper screw threaded portion 15 with the traveling nut 17. Therefore, the total lifting of the upper member 3 will be the sum of the distances traveled by the intermediate member and the upper member.
  • a lifting jack comprising telescoping upper, lower and intermediate members and an oppositely threaded double screw carrying the intermediate member, having its oppositely threaded portions engaged with the upper and lower members, respectively, said upper member having a cutaway portion, and a shield on the intermediate member for said cutaway portion.
  • a lifting jack comprising telescoping upper, lower and intermediate members, an oppositely threaded double screw carrying the intermediate member, having its oppositely threaded portions engaged with the upper and lower members, respectively, said upper member having a cutaway portion, means on the intermediate member projecting through the cutaway portion, and a shield on the intermediate member for said cutaway portion.
  • a lifting jack comprising telescoping upper, lower and intermediate members, and an inclosed oppositely threaded double screw supporting the intermediate and upper members and having its oppositely threaded portions engaged with the upper and lower members respectively, said upper member having a cutaway portion and said intermediate member having a shield therefor.
  • a lifting jack comprising telescoping upper, lower and intermediate members, a traveling nut interlocked with the upper member, an oppositely threaded double screw supporting the intermediate and upper members and having one of its threaded portions engaged with the lower member and its other threaded portion engaged with said traveling nut and an anti-friction bearing interposed between said upper member and traveling nut, said anti-friction bearing comprising upper, lower and intermediate plates and interposed rollers, said upper and lower plates being interlocked with the upper member and traveling nut respectively and said intermediate plate being locked to rotate with said screw.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Transmission Devices (AREA)

Description

0. L. CRABB.
LIFTING JACK.
APPLICATION FILED NOY.17. 1911.
Patented Aug. 26,1913.
2 SHEETSSHEBT 1.
[miifon C. L. CRABB.
LIFTING JACK.
APPLICATION FILED NOV. 17, 1911.
1 ,07 1 ,21 3, Patented Aug. 26, 1913.
2 SHEETS-SHEET 2.
will 556 [ill/finial:
the parts in their lowered UNITED STATES PATENT OFFICE.
CHARLES L. CRABB, OF MILLINGTON, NEW JEBSEY, ASSIGNOB TO TOPP ING BROTHERS, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.
LIF'IING-JACK.
Specification of Letters Patent.
Patented Aug. 26,1913.
To all whom it may concern Be it known that 1, CHARLES L. CRABB, a citizen of the United States, and resident of Millington, in the county of Morris and State of NewJersey, have invented a new and useful Improvement in LiftingJacks, of which the following is a specification.
This invention relates to an improvement in lifting jacks and has for its object to provide a device in which an oppositely threaded double lifting screw is rovided whereby each turn of the screw will lift the intermediate member of the jack a predetermined distance above the lower member or base. and, at the same time, will lift the up r member of the jack a predetermined istance with respect to the intermediate member thus lifting the upper member away from the lower member or base-a distance the sum of the movements of the intermediate and upper members.
A further object is to provide a jack of the above character which will be very simple in construction, easy to operate, strong and durable, and in which the operating parts are completely inclosed and protected in all positions of the jack.
A practical embodiment of my invention is represented in the accompanying drawin s, in -which igure 1 represents the lifting jack in to plan, Fig. 2 is a side view of the same wit osition, Fig. 3 is a section taken in the p ane of the line A-A of Fig. 2, looking in the direction of the arrows, Fig. 4 is a transverse section taken in the plane of the line BB of Fig. 3, looking in the direction of the arrows, and Fig. 5 is a section similar to Fig. 3, with the intermediate and upper members raised a distaiice away from the lower memher or base.
The lower member or base of the jack is denoted by 1, the intermediate member by 2 and the upper member by 3. These three members are hollow and are arranged to telescope one within the other. The lower member 1 is provided with a nut 4 arranged to receive the lower screw threaded portion 5 of an oppositely threaded double screw 6.
A bevel gear 7 is locked to the central portion of the double screw 6 within the u per ortion of the intermediate member 2 o the 1ack, in the present instance by providing a pin 9 passing through the screw and the hub of the said gear. This bevel gear 7 is plished 1n the provided with a shoulder 10 between which and the removable top 11 of the intermediate member 2 is interposed an antifriction bearing 8, for eliminating friction as far as possible at this point.
A horizontal shaft 12 is provided with a bevel gear 13 which meshes with the bevel gear 7 within the intermediate member 2.
This shaft 12 is mounted in suitable bear- ,ings in a plate 14 secured to the intermediate member 2.
A crank handle, not shown herein, or any other device, may be attached to the shaft 12 i for rotating the same to raise and lower the jack.
The upper portion 15 of the double screw 6 is threaded oppositely from the lower portion 5. This upper screw threaded portion 15 engages the travelingnut 17, which nut is provided with oppositely arranged lugs 18,
19, located inrecesses 20, 21, in the inner walls of the upper member 3 for preventing the nut from turning.
Anti-friction bearings are interposed between the upper member and the traveling nut, as follows :An annular row of balls 22 is interposed between upper and intermediate bearing plates 24, 25, and another annular row of balls 23 is interposed between the intermediate and lower bearing plates 25, 16. The intermediate bearing plate 25 is made to turn with the double screw 6 so as to insure a rolling action of the balls between the upper, lower and intermediate bearing plates, and thereby distribute the load evenly on the traveling nut 17, so as to absolutely prevent the nut from cramping on the screw 6. This is accomresent instance by cutting away the opposite sides of the upper screw threaded portion 15 and forming the hole through the intermediate bearing plate 25 to loosely fit the cross sectional form of the cutaway portion of the screw; the upper and lower bearing plates being, the one pinned to the upper member, and the other to the traveling nut.
The upper member 3 of the jack is provided with a shoulder 26 having an extended engagement with the upper bearing plate 24 so as to give great strength and rigidity to the jack when in its raised position.
The upper member 3 is cut away along one side to permit its movement relative to the intermediate member 2 and a shield 27 uprises from the top 11 of the intermediate member in position to close the 0 ening which would: otherwise be formed y the separation of the upper and intermediate members.
A screw 28 serves as a stop to prevent the upper member 3 from being separated unintentionally from the traveling nut 7 and another screw 29 is carried by the upper member in position to engage a shoulder or abutment 30 on the intermediate member to serve as a stop for limiting the movement of the upper member away from the intermediate and prevent the entire separation of the three members.
Oil is supplied to the screw threaded connections between the several parts, by providing a longitudinal duct 31 leading downwardly from the top of the screw, said duct having outlets where the screw passes through the nut 4 and the traveling nut 17. This duct may be packed with a wick so as to feed the oil in small quantities only.
In operation, as the oppositely threaded double screw 6 is turned by the rotation of the shaft 12 to lift the jack, the intermediate member 2 will be lifted a certain distance with respect to the lower member 1 by the engagement of the lower screw threaded portion 5 with the nut 4. At the same time, the upper member 3 will be lifted a proportionate distance with respect to the intermediate member 2 by the engagement of the upper screw threaded portion 15 with the traveling nut 17. Therefore, the total lifting of the upper member 3 will be the sum of the distances traveled by the intermediate member and the upper member.
It is evident that various changes might be resorted to in the construction, form and arrangement of the several parts without departing from the spirit and scope of my invention; hence I do not wish to limit myself strictly to the structure herein set forth, but
What I claim is 1. A lifting jack comprising telescoping upper, lower and intermediate members and an oppositely threaded double screw carrying the intermediate member, having its oppositely threaded portions engaged with the upper and lower members, respectively, said upper member having a cutaway portion, and a shield on the intermediate member for said cutaway portion.
2. A lifting jack comprising telescoping upper, lower and intermediate members, an oppositely threaded double screw carrying the intermediate member, having its oppositely threaded portions engaged with the upper and lower members, respectively, said upper member having a cutaway portion, means on the intermediate member projecting through the cutaway portion, and a shield on the intermediate member for said cutaway portion.
3. A lifting jack comprising telescoping upper, lower and intermediate members, and an inclosed oppositely threaded double screw supporting the intermediate and upper members and having its oppositely threaded portions engaged with the upper and lower members respectively, said upper member having a cutaway portion and said intermediate member having a shield therefor.
4. A lifting jack comprising telescoping upper, lower and intermediate members, a traveling nut interlocked with the upper member, an oppositely threaded double screw supporting the intermediate and upper members and having one of its threaded portions engaged with the lower member and its other threaded portion engaged with said traveling nut and an anti-friction bearing interposed between said upper member and traveling nut, said anti-friction bearing comprising upper, lower and intermediate plates and interposed rollers, said upper and lower plates being interlocked with the upper member and traveling nut respectively and said intermediate plate being locked to rotate with said screw.
In testimony that I claim the foregoing as my invention, I have signed my name in presence of two witnesses, this sixteenth day of November 1911.
CHARLES L. CRABB.
Witnesses:
F. GEORGE BARRY, HENRY C. THIEME.
US66079411A 1911-11-17 1911-11-17 Lifting-jack. Expired - Lifetime US1071213A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US66079411A US1071213A (en) 1911-11-17 1911-11-17 Lifting-jack.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US66079411A US1071213A (en) 1911-11-17 1911-11-17 Lifting-jack.

Publications (1)

Publication Number Publication Date
US1071213A true US1071213A (en) 1913-08-26

Family

ID=3139447

Family Applications (1)

Application Number Title Priority Date Filing Date
US66079411A Expired - Lifetime US1071213A (en) 1911-11-17 1911-11-17 Lifting-jack.

Country Status (1)

Country Link
US (1) US1071213A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2482082A (en) * 1944-06-07 1949-09-13 Electrolux Corp Screw jack
US4649764A (en) * 1984-08-31 1987-03-17 Hills Industries Limited Hoist elevating means
US20090016814A1 (en) * 2007-07-14 2009-01-15 Fu-Yuan Cheng Connecting Device for an Actuator
CN103171166A (en) * 2011-12-22 2013-06-26 固特异轮胎和橡胶公司 Method of applying ply to tire building drum
CN103171165A (en) * 2011-12-22 2013-06-26 固特异轮胎和橡胶公司 Tire ply applier

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2482082A (en) * 1944-06-07 1949-09-13 Electrolux Corp Screw jack
US4649764A (en) * 1984-08-31 1987-03-17 Hills Industries Limited Hoist elevating means
US20090016814A1 (en) * 2007-07-14 2009-01-15 Fu-Yuan Cheng Connecting Device for an Actuator
CN103171166A (en) * 2011-12-22 2013-06-26 固特异轮胎和橡胶公司 Method of applying ply to tire building drum
CN103171165A (en) * 2011-12-22 2013-06-26 固特异轮胎和橡胶公司 Tire ply applier
US20130192764A1 (en) * 2011-12-22 2013-08-01 George Michael Stoila Tire ply applier
US8800629B2 (en) * 2011-12-22 2014-08-12 The Goodyear Tire & Rubber Company Tire ply applier
US9114581B2 (en) 2011-12-22 2015-08-25 The Goodyear Tire & Rubber Company Method of applying ply to a tire building drum

Similar Documents

Publication Publication Date Title
US1071213A (en) Lifting-jack.
US1037874A (en) Lifting-jack.
US1862759A (en) Double lift single screw jack
US1522967A (en) Lift
US1409257A (en) Rotatable worktable
DE955180C (en) Overfill protection for cranes with a three-point lift winch supported on the drum shaft
USRE14465E (en) Henby l benedict
US1722275A (en) Lifting jack
US1322808A (en) Caster-table
US713642A (en) Lifting-jack.
US1455571A (en) Screw jack
US1424952A (en) Housing for vertical screw jacks
US1328115A (en) Jack-base
DE825880C (en) Construction crane
US946439A (en) Ball-bearing.
US63212A (en) chapman
US163791A (en) Improvement in lifting-jacks
US1360430A (en) Roller-bearing
US817637A (en) Lifting-jack.
DE479854C (en) Swivel bridge, the rollers of which lie on a horizontal track when a bridge end support is lowered
USRE19923E (en) Balloon tire jack
DE944593C (en) Boom for radial drilling machines
US77261A (en) Improvement in self-lubricating- boxes for shafting
US817520A (en) Brick-truck.
DE523556C (en) Friction drum for ropes or chains