GB1034258A - Improvements relating to extensible booms - Google Patents
Improvements relating to extensible boomsInfo
- Publication number
- GB1034258A GB1034258A GB2346564A GB2346564A GB1034258A GB 1034258 A GB1034258 A GB 1034258A GB 2346564 A GB2346564 A GB 2346564A GB 2346564 A GB2346564 A GB 2346564A GB 1034258 A GB1034258 A GB 1034258A
- Authority
- GB
- United Kingdom
- Prior art keywords
- section
- extended
- retracted
- end section
- intermediate section
- 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
- 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)
- Jib Cranes (AREA)
Abstract
1,034,258. Hydraulically operated telescopic jib. DROTT MANUFACTURING CORPORATION. June 5, 1964 [June 24, 1963; April 20, 1964], No. 23465/64. Heading B8B. A telescopic jib for cranes has an outer section 10, Fig. 1, an intermediate section 16 and an end section 19 and is extended by a double hydraulic motor, within the jib, which ensures that the weaker end section is not extended before the intermediate section and is not retracted after the intermediate section. Pressure fluid supplied through a conduit 39, Fig. 2, acts on pistons 34, 37 and moves them to the right. A piston-rod 24 moves the intermediate section 16 with respect to the outer section 10, and a piston-rod 25 moves the end section 19 with respect to the section 16. By a suitable choice of dimensions for the'pistons the boom sections can be extended and retracted in any desired sequence. The end section may be extended after and retracted before the intermediate section, or both may be extended and retracted simultaneously and proportionately to maintain a balanced load on the sections. A drum 13, Fig. 1, which may be driven by an hydraulic motor, is provided for winding the load cable. The latter passes over a sheave in a block 14 or the end section of the boom.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US29010863A | 1963-06-24 | 1963-06-24 | |
| US363662A US3264950A (en) | 1964-04-20 | 1964-04-20 | Extensible boom |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1034258A true GB1034258A (en) | 1966-06-29 |
Family
ID=26966012
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2346564A Expired GB1034258A (en) | 1963-06-24 | 1964-06-05 | Improvements relating to extensible booms |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1034258A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2487801A1 (en) * | 1980-08-04 | 1982-02-05 | Creusot Loire | Telescopic jib for crane - is actuated hydraulically from single acting hydraulic cylinder in centre of sections |
-
1964
- 1964-06-05 GB GB2346564A patent/GB1034258A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2487801A1 (en) * | 1980-08-04 | 1982-02-05 | Creusot Loire | Telescopic jib for crane - is actuated hydraulically from single acting hydraulic cylinder in centre of sections |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1356517A (en) | Light weight telescoping boom | |
| GB1154858A (en) | Improvements in an Extensible Jib, Mast or the like | |
| GB1073970A (en) | Hydraulic system for operating a crane winch | |
| GB1343803A (en) | Hydraulic vehicle crane | |
| GB1310454A (en) | Cranes having telescopic booms | |
| GB1211037A (en) | Telescopic crane boom section | |
| GB1433448A (en) | Cranes | |
| GB1189259A (en) | Extensible and Retractable Boom Construction | |
| GB1152143A (en) | Telescopic Boom for a Crane or the like | |
| GB1405387A (en) | Telescopic boom | |
| GB1094732A (en) | Load handling mechanism | |
| GB1034258A (en) | Improvements relating to extensible booms | |
| GB1036737A (en) | Convertible crane | |
| GB1262553A (en) | A telescopic crane boom | |
| GB996853A (en) | Improvements in or relating to crane boom constructions | |
| GB1171714A (en) | Four-Section Fully Hydraulically Operated Crane Boom | |
| GB1402214A (en) | Device for feeding a hydraulic load element mounted on a telescopic structure by means of two jacks | |
| GB1191395A (en) | Improvements in or relating to Cranes. | |
| GB1104157A (en) | Improvements relating to cranes | |
| GB1048151A (en) | Earth boring derrick | |
| GB1344110A (en) | Constant load position telescoping boom | |
| GB1253815A (en) | Improvements relating to derrick cranes and like derrick hoists | |
| GB1046631A (en) | Improvements in or relating to earthmoving and hoisting machines such as power shovels, cranes or the like | |
| GB1044880A (en) | Ship's derricks | |
| GB1202599A (en) | Improvements in or relating to crane jibs |