GB557642A - Self-holding jack - Google Patents
Self-holding jackInfo
- Publication number
- GB557642A GB557642A GB686242A GB686242A GB557642A GB 557642 A GB557642 A GB 557642A GB 686242 A GB686242 A GB 686242A GB 686242 A GB686242 A GB 686242A GB 557642 A GB557642 A GB 557642A
- Authority
- GB
- United Kingdom
- Prior art keywords
- nut
- ram
- jack
- self
- lever
- 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
- B66F3/24—Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
- B66F3/25—Constructional features
- B66F3/30—Constructional features with positive brakes or locks
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Types And Forms Of Lifts (AREA)
Abstract
557,642. Jacks. GRIME, E. P. May 20, 1942, No. 6862. [Class 78 (iii)] A fluid-pressure jack is provided on its ram 3 with a square or other sectioned screw thread 14 on which rides a nut 15. After the ram 3 has been brought to its desired holding position by operation of a pump 7, the nut 15 is turned down till it contacts the head 16 of the cylinder 2 and casing. The nut may be knurled for finger operation, and may have recesses 15a to receive a rotating lever, in which case the ram may be moved by said nut and lever when conditions warrant such actuation. The jack may be mounted on a tripod.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB686242A GB557642A (en) | 1942-05-20 | 1942-05-20 | Self-holding jack |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB686242A GB557642A (en) | 1942-05-20 | 1942-05-20 | Self-holding jack |
Publications (1)
Publication Number | Publication Date |
---|---|
GB557642A true GB557642A (en) | 1943-11-29 |
Family
ID=9822112
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB686242A Expired GB557642A (en) | 1942-05-20 | 1942-05-20 | Self-holding jack |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB557642A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111410135A (en) * | 2020-03-31 | 2020-07-14 | 成都飞机工业(集团)有限责任公司 | Jack with fine adjustment and locking functions |
-
1942
- 1942-05-20 GB GB686242A patent/GB557642A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111410135A (en) * | 2020-03-31 | 2020-07-14 | 成都飞机工业(集团)有限责任公司 | Jack with fine adjustment and locking functions |
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