GB1310268A - Hydraulic telescopic jibs or derricks - Google Patents
Hydraulic telescopic jibs or derricksInfo
- Publication number
- GB1310268A GB1310268A GB2130770A GB2130770A GB1310268A GB 1310268 A GB1310268 A GB 1310268A GB 2130770 A GB2130770 A GB 2130770A GB 2130770 A GB2130770 A GB 2130770A GB 1310268 A GB1310268 A GB 1310268A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cylinders
- piston
- cylinder
- rod
- extended
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/16—Characterised by the construction of the motor unit of the straight-cylinder type of the telescopic type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
- B66C23/70—Jibs constructed of sections adapted to be assembled to form jibs or various lengths
- B66C23/701—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic
- B66C23/705—Jibs constructed of sections adapted to be assembled to form jibs or various lengths telescopic telescoped by hydraulic jacks
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Actuator (AREA)
Abstract
1310268 Hydraulic rams C F WEYHAUSEN 4 May 1970 12 May 1969] 21307/70 Heading F1D Each of two similarly dimensioned hydraulic ram cylinders 3, 5 fixed to a first member 11 to be extended and having common end plates contain pistons 1, 6 the rods 1a, 6a of which:are of different diameter, extend in opposite directions and are fixed respectively at 14a, 14 to a stationary member 10 and to a second member 12 to be extended, and the head ends of the cylinders 3, 5 are hydraulically connected by a line 9 including a pretensioned check valve 7 whereas the rod ends of the cylinders are hydraulically connected by a line 4 having a branchline connected through non-pretensioned check valve 8 to the head end of cylinder 5 whereby to effect retraction. Pressure fluid is fed at 2 to the rod end of cylinder 3 thus the piston 6 hence member 12 is first retracted followed by retraction of connected cylinders 3, 5 and hence member 11. To effect extension of members 11, 12 pressure fluid is fed at 15 and through a bore in rod 1a extending through piston 1 to move connected cylinders 3, 5 thence member 11 to the right. When piston 1 abuts cylinder end wall 13 the pressure rise at the head end of cylinder 3 opens valve 7 resulting in piston 6, rod 6a thence member 12 being extended. The members 11, 12 form telescopic members of a jib arm 10.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19691922486 DE1922486C (en) | 1969-05-02 | Hydraulic telescopic extension boom |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1310268A true GB1310268A (en) | 1973-03-14 |
Family
ID=5733102
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2130770A Expired GB1310268A (en) | 1969-05-02 | 1970-05-04 | Hydraulic telescopic jibs or derricks |
Country Status (2)
Country | Link |
---|---|
GB (1) | GB1310268A (en) |
SE (1) | SE357941B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2176845A (en) * | 1985-06-21 | 1987-01-07 | 600 Group Plc The | Hydraulically operated telescopic device |
-
1970
- 1970-04-20 SE SE537370A patent/SE357941B/xx unknown
- 1970-05-04 GB GB2130770A patent/GB1310268A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2176845A (en) * | 1985-06-21 | 1987-01-07 | 600 Group Plc The | Hydraulically operated telescopic device |
GB2176845B (en) * | 1985-06-21 | 1989-04-26 | 600 Group Plc The | Improvements in telescopic devices such as crane jibs |
Also Published As
Publication number | Publication date |
---|---|
SE357941B (en) | 1973-07-16 |
DE1922486B2 (en) | 1972-08-24 |
DE1922486A1 (en) | 1970-11-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |