GB321525A - Improvements in and connected with lifting jacks - Google Patents
Improvements in and connected with lifting jacksInfo
- Publication number
- GB321525A GB321525A GB2896228A GB2896228A GB321525A GB 321525 A GB321525 A GB 321525A GB 2896228 A GB2896228 A GB 2896228A GB 2896228 A GB2896228 A GB 2896228A GB 321525 A GB321525 A GB 321525A
- Authority
- GB
- United Kingdom
- Prior art keywords
- groove
- engaged
- projection
- hill
- enlargement
- 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
- 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
- B66F3/18—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated actuated through worm gearings
-
- 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
- B66F3/10—Devices, e.g. jacks, adapted for uninterrupted lifting of loads screw operated with telescopic sleeves
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Rehabilitation Tools (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
Abstract
321,525. Hill, S., and Hill, E. Oct. 9, 1928. No Patent granted (Sealing fee not paid). Jacks. - A multipleextension screw jack of the kind having screwed members telescoping one within the other and a gear wheel at the bottom of the outermost member has a spring-pressed projection engaging a groove in the intermediate member so as to prevent it from rotating until it is fullv extended or withdrawn. The outer sleeve 3 has an enlargement 3a at its upper end resting in an enlargement at the upper end of the casing 5 and is rotated by a toothed wheel 4 at its lower end. The upper end of the outer sleeve has an internal screw thread 13 engaging the screwed intermediate sleeve 2 which has a similar engagement with the crutch stem 1. A longitudinal groove in the intermediate sleeve is engaged by a projection 19, Fig. 6, on a plate 19b pivotally mounted on the casing and having an apertured extension 19<c> engaged by a locating stud 21 carrying a spring pressing against the plate. In operation the projection is engaged with the groove to prevent the rotation of the intermediate member except at the upper and lower limits of movement when it is withdrawn from the groove by the tapered ends of the threads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2896228A GB321525A (en) | 1928-10-09 | 1928-10-09 | Improvements in and connected with lifting jacks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2896228A GB321525A (en) | 1928-10-09 | 1928-10-09 | Improvements in and connected with lifting jacks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB321525A true GB321525A (en) | 1929-11-14 |
Family
ID=10284004
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2896228A Expired GB321525A (en) | 1928-10-09 | 1928-10-09 | Improvements in and connected with lifting jacks |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB321525A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2438007A1 (en) * | 1978-10-05 | 1980-04-30 | Rentrop Hubbert & Wagner | LIFTING DEVICE |
| GB2410240A (en) * | 2004-01-22 | 2005-07-27 | Kawasaki Ind Co Ltd | Screw jack |
| CN107445096A (en) * | 2017-08-28 | 2017-12-08 | 鞍钢集团矿业有限公司 | Telescopic multifunctional hoisting apparatus |
| CN109049100A (en) * | 2018-09-30 | 2018-12-21 | 涿州皓原箔业有限公司 | A kind of seamless disconnected dicer of three rollers for producing ultra-thin aluminum foil |
-
1928
- 1928-10-09 GB GB2896228A patent/GB321525A/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2438007A1 (en) * | 1978-10-05 | 1980-04-30 | Rentrop Hubbert & Wagner | LIFTING DEVICE |
| GB2410240A (en) * | 2004-01-22 | 2005-07-27 | Kawasaki Ind Co Ltd | Screw jack |
| GB2410240B (en) * | 2004-01-22 | 2006-12-06 | Kawasaki Ind Co Ltd | Screw jack |
| CN107445096A (en) * | 2017-08-28 | 2017-12-08 | 鞍钢集团矿业有限公司 | Telescopic multifunctional hoisting apparatus |
| CN109049100A (en) * | 2018-09-30 | 2018-12-21 | 涿州皓原箔业有限公司 | A kind of seamless disconnected dicer of three rollers for producing ultra-thin aluminum foil |
| CN109049100B (en) * | 2018-09-30 | 2023-10-10 | 涿州皓原箔业有限公司 | Three-roller traceless breaking Zhang Qiekuai machine for producing ultrathin aluminum foil |
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