GB1033728A - Device for luffing the jib of a crane - Google Patents
Device for luffing the jib of a craneInfo
- Publication number
- GB1033728A GB1033728A GB664463A GB664463A GB1033728A GB 1033728 A GB1033728 A GB 1033728A GB 664463 A GB664463 A GB 664463A GB 664463 A GB664463 A GB 664463A GB 1033728 A GB1033728 A GB 1033728A
- Authority
- GB
- United Kingdom
- Prior art keywords
- line
- piston
- distributer
- controlled
- reservoir
- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
-
- 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
- B66C23/72—Counterweights or supports for balancing lifting couples
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
-
- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
- F15B11/12—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action
- F15B11/121—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action providing distinct intermediate positions
- F15B11/123—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action providing distinct intermediate positions by means of actuators with fluid-operated stops
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C2700/00—Cranes
- B66C2700/03—Cranes with arms or jibs; Multiple cranes
- B66C2700/0392—Movement of the crane arm; Coupling of the crane arm with the counterweights; Safety devices for the movement of the arm
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C2700/00—Cranes
- B66C2700/06—Cranes in which the lifting movement is done with a hydraulically controlled plunger
- B66C2700/062—Cranes in which the lifting movement is done with a hydraulically controlled plunger mounted on motor vehicles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Automation & Control Theory (AREA)
- Analytical Chemistry (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Actuator (AREA)
- Earth Drilling (AREA)
- Jib Cranes (AREA)
Abstract
1,033,728. Telescopic rams. A. MASERA. Feb. 19, 1963 [July 5, 1962], No. 6644/63. Heading F1P. [Also in Divisions B8 and E1] A three-stage hydraulic ram A for luffing a crane jib or excavator arm comprises a cylinder 16 provided with a piston 20 secured to a tubular piston rod 22 constituting a cylinder for a piston 24 and is controlled by a distributer G formed in two sections G 1 , G 2 , controlling the flow of fluid between the supply line H and the reservoir line K, the line L leading to the chamber above the pistons 20, 24 and lines M, N extending between the chamber beneath the piston 20 and the section G 2 and between the chamber beneath the piston 24 and the section G 1 respectively. The sections G 1 , G 2 are controlled by three-position hand levers Q, P whereby the movements of the pistons 20, 24 are selectively controllable. In a second embodiment, Fig. 3, an auxiliary distributer R, controlled by a simplified main distributer G, is provided. When the lever P is moved to position II, the supply line H is connected to the line L and the line N is connected, in the distributer R to the line R 1 which is connected to the reservoir line K, and the line M is closed by the distributer R so that only the piston 24 moves down. When the piston 24 is fully extended, pressure in the line L 1 raises the piston 50 in the distributer R thereby connecting the line M to the line N and therefore, to the line R, leading to the line K so that the piston 20 is then extended. In the position III, the line L is connected to the reservoir line K and the pressure line H is connected to the line R 1 which communicates with the line N thereby retracting the piston 24. Simultaneously, pressure fluid in the line N passes through a line N 1 to raise the piston 50 which then interconnects the lines M, N, thereby retracting the piston 20. An adjustable relief valve S, Fig. 4 (not shown) is provided in the line L for controlling the retraction of the ram.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT1343962 | 1962-07-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1033728A true GB1033728A (en) | 1966-06-22 |
Family
ID=11144442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB664463A Expired GB1033728A (en) | 1962-07-05 | 1963-02-19 | Device for luffing the jib of a crane |
Country Status (4)
| Country | Link |
|---|---|
| CH (1) | CH433646A (en) |
| DK (1) | DK113801B (en) |
| GB (1) | GB1033728A (en) |
| NL (1) | NL289112A (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 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH501156A (en) * | 1968-12-28 | 1970-12-31 | Pesci Spa Carlo | Method and device for controlling telescopic, hydraulic multi-piston working cylinders |
-
0
- NL NL289112D patent/NL289112A/xx unknown
-
1963
- 1963-02-19 GB GB664463A patent/GB1033728A/en not_active Expired
- 1963-03-20 DK DK127463A patent/DK113801B/en unknown
- 1963-04-02 CH CH427563A patent/CH433646A/en unknown
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 |
|---|---|
| DK113801B (en) | 1969-04-28 |
| NL289112A (en) | |
| CH433646A (en) | 1967-04-15 |
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