GB773789A - Improvements in or relating to hydraulic jacks - Google Patents
Improvements in or relating to hydraulic jacksInfo
- Publication number
- GB773789A GB773789A GB3407253A GB3407253A GB773789A GB 773789 A GB773789 A GB 773789A GB 3407253 A GB3407253 A GB 3407253A GB 3407253 A GB3407253 A GB 3407253A GB 773789 A GB773789 A GB 773789A
- Authority
- GB
- United Kingdom
- Prior art keywords
- jack
- ram
- reservoir
- oil
- plunger
- 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)
- Loading Or Unloading Of Vehicles (AREA)
Abstract
773,789. Straightening damaged conveyer flight bars. WILD & CO., Ltd., A. G. Dec. 1, 1954 [Dec. 8, 1953], No. 34072/53. Class 83 (4). [Also in Groups XXIX and XXX] The " flight " bars, which maintain two chains on a coal conveyer at their correct distance apart, are straightened by an hydraulic jack without removing them from the conveyer. The jack has legs which fit over bolt heads on an adjacent bar, thereby giving suitable anchorage to the jack. The plunger of a pump operating the jack opens valves when at one extreme end of its stroke to lower the jack. Movement of a handle 21 reciprocates a plunger 7 of the pump 3 mounted on the end of the jack comprising a tubular ram 2 in a cylinder 1. Oil is drawn through a valve 14 from a pipe 12 extending into the ram and is forced through a valve 17 to extend the ram. To lower the ram, the handle 21 is moved to an inoperative position in which a spring-loaded catch 26 engages a bracket 28 and the plunger engages a spigot 33 and also a tubular member 35 with a lip 36, thereby opening the valves 14, 17 so that the oil returns to the reservoir. The ram forms a reservoir, but in a modification a separate reservoir is provided. In a further modification, the oil is contained in a bellows of natural or synthetic rubber or of a synthetic plastic inside the ram. The legs are pivoted on the jack and are held by spring clips against the jack when not in use. The stoke of the jack is governed by the amount of oil in the reservoir which is designed to prevent overfilling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3407253A GB773789A (en) | 1953-12-08 | 1953-12-08 | Improvements in or relating to hydraulic jacks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3407253A GB773789A (en) | 1953-12-08 | 1953-12-08 | Improvements in or relating to hydraulic jacks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB773789A true GB773789A (en) | 1957-05-01 |
Family
ID=10361035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3407253A Expired GB773789A (en) | 1953-12-08 | 1953-12-08 | Improvements in or relating to hydraulic jacks |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB773789A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2155104A (en) * | 1984-03-03 | 1985-09-18 | Michael Hung | A jack incorporating a fluid sac |
-
1953
- 1953-12-08 GB GB3407253A patent/GB773789A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2155104A (en) * | 1984-03-03 | 1985-09-18 | Michael Hung | A jack incorporating a fluid sac |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1189592A (en) | Improvements in or relating to Piston Pumps. | |
| US2560676A (en) | Pneumatic-hydraulic system for well pumping or drilling units | |
| GB1277421A (en) | Improvements in or relating to pneumatic springs | |
| GB450645A (en) | Improvements in reciprocating pumps | |
| GB850248A (en) | Apparatus for cold bending of tubular bodies and the like | |
| GB773789A (en) | Improvements in or relating to hydraulic jacks | |
| US1493267A (en) | Oil pump | |
| DE10335C (en) | Innovations in drainage | |
| DE721443C (en) | Tipping device for moving vehicles, in particular railway vehicles | |
| DE463501C (en) | Grease pump | |
| US2524963A (en) | Ranch and farm service unit | |
| SU35790A1 (en) | Punching machine | |
| GB699778A (en) | Lubrication of screw jack mechanisms | |
| DE1777138U (en) | DEVICE FOR INDEPENDENT LUBRICATION OF MOVING LUBRICATION POINTS. | |
| DE496286C (en) | Baubrication, especially for air hammer | |
| AT99839B (en) | Piston pump without pressure valves. | |
| GB311571A (en) | Improvements in or relating to grease-guns | |
| GB455524A (en) | Improvements in devices for dispensing lubricant and the like | |
| GB736169A (en) | Improvements in and relating to lubricating pumps having visible feed arrangements | |
| GB217520A (en) | An improved hand-operated air pump | |
| AT147340B (en) | Fountain pen. | |
| GB270958A (en) | Improvements in and relating to pneumatic conveyors | |
| SU51146A1 (en) | Pump for lubricant supply to air pump cylinders | |
| ES78623U (en) | Pressure lubrication pump (Machine-translation by Google Translate, not legally binding) | |
| ES238072A3 (en) | Improvements in the petrol pulse pumps (Machine-translation by Google Translate, not legally binding) |