GB221412A - Improvements in fluid-actuated lifting jacks - Google Patents
Improvements in fluid-actuated lifting jacksInfo
- Publication number
- GB221412A GB221412A GB159024A GB159024A GB221412A GB 221412 A GB221412 A GB 221412A GB 159024 A GB159024 A GB 159024A GB 159024 A GB159024 A GB 159024A GB 221412 A GB221412 A GB 221412A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cylinder
- pumps
- jack
- conduit
- fluid
- 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
- B66F3/42—Constructional features with self-contained pumps, e.g. actuated by hand
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
- Reciprocating Pumps (AREA)
Abstract
221,412. La Mare, F. T. de, and Gibert, F. E. Jan. 19, 1924. Jacks.-In fluid-pressure actuated jacks of the kind comprising one or more pumps arranged to transmit a motive impulse to the piston of the jack at each stroke of an oscillating actuating lever, the discharge stroke of the pumps 7 is effected by the lever 14 pressing upon the projecting extremities of the pump pistons 9 and the suction stroke. by the engagement of forked yokes 20 attached to the lever with pins 22 fixed to the pistons. The head 25 of the jack is attached to the closed upper end of a cylinder 24 which is disposed between cylinders 6, 23 screwed into the base 1 of the jack. The pumps discharge into a conduit 29 which communicates with the cylinder 23 by an inlet controlled by a ball valve 30. An aperture 23<a> in the head of the. cylinder 23 allows fluid to pass into the cylinder 24. A bent piece 31 of spring steel normally holds the ball on its seating. The conduits 34, 35 connecting the reservoir 6 and pumps contain spring-pressed ball valves 36. A conduit is also provided by which direct ccmmunication can be effected between the conduit 29 and reservoir 6 when the load is to be lowered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB159024A GB221412A (en) | 1924-01-19 | 1924-01-19 | Improvements in fluid-actuated lifting jacks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB159024A GB221412A (en) | 1924-01-19 | 1924-01-19 | Improvements in fluid-actuated lifting jacks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB221412A true GB221412A (en) | 1924-09-11 |
Family
ID=9724567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB159024A Expired GB221412A (en) | 1924-01-19 | 1924-01-19 | Improvements in fluid-actuated lifting jacks |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB221412A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2051853A1 (en) * | 1969-07-17 | 1971-04-09 | Markus Kramp Georg | |
| CN109704222A (en) * | 2019-01-15 | 2019-05-03 | 中铁工程装备集团盾构制造有限公司 | A kind of shield machine penstock installation lifting device and method |
-
1924
- 1924-01-19 GB GB159024A patent/GB221412A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2051853A1 (en) * | 1969-07-17 | 1971-04-09 | Markus Kramp Georg | |
| CN109704222A (en) * | 2019-01-15 | 2019-05-03 | 中铁工程装备集团盾构制造有限公司 | A kind of shield machine penstock installation lifting device and method |
| CN109704222B (en) * | 2019-01-15 | 2024-02-09 | 中铁工程装备集团盾构制造有限公司 | Lifting device and method for shield tunneling machine steel pipe installation |
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