GB376731A - Improvements relating to portable lifting jacks - Google Patents
Improvements relating to portable lifting jacksInfo
- Publication number
- GB376731A GB376731A GB1017031A GB1017031A GB376731A GB 376731 A GB376731 A GB 376731A GB 1017031 A GB1017031 A GB 1017031A GB 1017031 A GB1017031 A GB 1017031A GB 376731 A GB376731 A GB 376731A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pawls
- handle
- lifting
- engage
- racks
- 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
Links
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
- B66F1/00—Devices, e.g. jacks, for lifting loads in predetermined steps
- B66F1/02—Devices, e.g. jacks, for lifting loads in predetermined steps with locking elements, e.g. washers, co-operating with posts
- B66F1/04—Devices, e.g. jacks, for lifting loads in predetermined steps with locking elements, e.g. washers, co-operating with posts the posts being toothed
- B66F1/06—Devices, e.g. jacks, for lifting loads in predetermined steps with locking elements, e.g. washers, co-operating with posts the posts being toothed and the devices being actuated mechanically
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Handcart (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Abstract
376,731. Lifting-jacks. ROSE, W. and PRECISION METAL WARES, Ltd., 179, Belgrave Road, Birmingham. April 7, 1931, No. 10170. [Class 78 (iii).] A ratchet jack of the kind having pawls e, d set for lifting and lowering by a displacement of the lever handle in its socket is constructed with toothed racks a<2> on the jack body, and the operating lever fulcrums alternately on the lifting pillar c to raise or lower the pawls e and on the fulcrum of the pawls e to raise or lower the lifting pillar c and pawls d carried thereon. The operating handle g is inserted in a socketed member f and is provided with recesses k<2> co-operating with balls or plungers j so that by sliding or turning the handle g in the socket, blade springs k, k<1> can be set to the inoperative position shown for lifting or can be held outwardly from the socket to engage the pawls for lowering. The' member f is pivoted in the lifting pillar c at f<2> and carries main pawls e pivoted at e<2>. The pillar c carries a bracket c<1> with holding pawls d pivoted at d<2>. For lifting, during the downward stroke of the handle the lever f<2> pivots at e<2> while the pawls d ride upwards on the racks a<2>, and during the upward stroke the load is carried by the pawls d while the lever pivots at f<2> and the pawls e ride upwards on the racks. When the handle g is set for lowering and the blade springs k are held outwards away from the member f they engage the tails of the pawls d, e in turn so that on the downstroke of the handle the pawls d are withdrawn from the racks in readiness to engage the next lower teeth when the handle is first raised, and the pawls e are then withdrawn from the racks in readiness to engage the next lower teeth when the handle is first lowered. A casing mover the pawl mechanism is flanged at m<1> to engage a stop l on the jack body and limit the upward movement of the pillar.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1017031A GB376731A (en) | 1931-04-07 | 1931-04-07 | Improvements relating to portable lifting jacks |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1017031A GB376731A (en) | 1931-04-07 | 1931-04-07 | Improvements relating to portable lifting jacks |
Publications (1)
Publication Number | Publication Date |
---|---|
GB376731A true GB376731A (en) | 1932-07-07 |
Family
ID=9962821
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1017031A Expired GB376731A (en) | 1931-04-07 | 1931-04-07 | Improvements relating to portable lifting jacks |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB376731A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1286276B (en) * | 1966-09-30 | 1969-01-02 | Finkbeiner W | Climbing jack with an air bellows |
-
1931
- 1931-04-07 GB GB1017031A patent/GB376731A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1286276B (en) * | 1966-09-30 | 1969-01-02 | Finkbeiner W | Climbing jack with an air bellows |
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