GB764197A - A new or improved hydraulic jack - Google Patents
A new or improved hydraulic jackInfo
- Publication number
- GB764197A GB764197A GB2949254A GB2949254A GB764197A GB 764197 A GB764197 A GB 764197A GB 2949254 A GB2949254 A GB 2949254A GB 2949254 A GB2949254 A GB 2949254A GB 764197 A GB764197 A GB 764197A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wire
- ram
- hydraulic jack
- collets
- housing
- 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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
- E04G21/121—Construction of stressing jacks
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- Wire Processing (AREA)
Abstract
764,197. Wire strainers. P.S.C. EQUIPMENT, Ltd. Oct. 13, 1954, No. 29492/54. Class 45. [Also in Groups X and XXX] A hydraulic jack, Fig. 1 for stressing the wire 54 of a prestressed concrete structure comprises a cylinder 1, 3 and a spring-loaded piston 5, 7, 9 having a guide tube 19 and anchoring means 35 for the wire. The housing 28, 29, 30 of a screwthreaded ram 21 is secured to the jack by screws 32. The ram is axially moved by a tommy bar inserted through holes in a nut 23 and is held against rotation by co-operating flats formed on the ram and a member 30a. The ram urges the collets 36 of a chuck 37 mounted in the concrete into contact with the wire whilst the piston tensions the wire. In a modification, Fig. 4, the ram unit is replaced by a housing 38 having a slide 43 which is urged into contact with the collets by a drift inserted in the slot 45.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2949254A GB764197A (en) | 1954-10-13 | 1954-10-13 | A new or improved hydraulic jack |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2949254A GB764197A (en) | 1954-10-13 | 1954-10-13 | A new or improved hydraulic jack |
Publications (1)
Publication Number | Publication Date |
---|---|
GB764197A true GB764197A (en) | 1956-12-19 |
Family
ID=10292406
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2949254A Expired GB764197A (en) | 1954-10-13 | 1954-10-13 | A new or improved hydraulic jack |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB764197A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3184219A (en) * | 1963-06-11 | 1965-05-18 | James S Simms | Tensioning units |
US3447784A (en) * | 1965-01-04 | 1969-06-03 | Travaux Comp Ind De | Apparatus for prestressing concrete |
CN108190782A (en) * | 2018-03-01 | 2018-06-22 | 柳州煜乾机械装备股份公司 | For the interior card jack to the deeper girder tensioning of beam-ends tensioning duct notch |
CN112140054A (en) * | 2020-10-12 | 2020-12-29 | 中车资阳机车有限公司 | Portable and rapid engine cam bearing bush dismounting tool |
-
1954
- 1954-10-13 GB GB2949254A patent/GB764197A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3184219A (en) * | 1963-06-11 | 1965-05-18 | James S Simms | Tensioning units |
US3447784A (en) * | 1965-01-04 | 1969-06-03 | Travaux Comp Ind De | Apparatus for prestressing concrete |
CN108190782A (en) * | 2018-03-01 | 2018-06-22 | 柳州煜乾机械装备股份公司 | For the interior card jack to the deeper girder tensioning of beam-ends tensioning duct notch |
CN112140054A (en) * | 2020-10-12 | 2020-12-29 | 中车资阳机车有限公司 | Portable and rapid engine cam bearing bush dismounting tool |
CN112140054B (en) * | 2020-10-12 | 2024-04-16 | 中车资阳机车有限公司 | Portable and quick dismounting tool for engine cam bearing bush |
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