GB1376427A - Telescoping crane boom - Google Patents
Telescoping crane boomInfo
- Publication number
- GB1376427A GB1376427A GB2721773A GB2721773A GB1376427A GB 1376427 A GB1376427 A GB 1376427A GB 2721773 A GB2721773 A GB 2721773A GB 2721773 A GB2721773 A GB 2721773A GB 1376427 A GB1376427 A GB 1376427A
- Authority
- GB
- United Kingdom
- Prior art keywords
- section
- actuator
- fly
- pinned
- boom
- 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
1376427 Telescopic crane Jibs HARNISCHFEGER CORP 7 June 1973 27217/73 Heading B8B A telescopic boom comprises four tubular sections: fly 1, second 2, third 3 and base 4. As shown in the operational position the fly section 1 is pinned at 9 to the second section 2 to move therewith when hydraulic actuator 5, pinned at C to the inner end of the section 3 and at B to the inner end of the section 2, is operated. The section 3 is moved relative to the section 4 by hydraulic actuator 6 pinned at A to the inner end of the base section 4 and at D to the inner end of the section 3. To collapse the boom for road transport from the position shown actuator 54 is retracted until the fly section 1 can be pinned at 10 to the actuator 6 at pin hole 8 thereon. The fly section 1 is then unpinned from the second section 2 at 9. Extension of the actuator 5 effectively retracts the fly section 1 into the second section 2 by extending the second section 2, the fly section 1 being held by the actuator 6. The fly section 1 can now be pinned at 7 to the outer end of the section 2 and unpinned from the actuator 6. Retraction of the actuator 5 now retracts the section 2 into the section 3 whereupon retraction of the actuator 6 retracts the section 3 into the base section 4 and the boom is ready for transport. Access holes are provided to facilitate the insertion and removal of the various pins. Extension of the boom from the transport position to the operational position shown reverses the above steps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2721773A GB1376427A (en) | 1973-06-07 | 1973-06-07 | Telescoping crane boom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2721773A GB1376427A (en) | 1973-06-07 | 1973-06-07 | Telescoping crane boom |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1376427A true GB1376427A (en) | 1974-12-04 |
Family
ID=10256058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2721773A Expired GB1376427A (en) | 1973-06-07 | 1973-06-07 | Telescoping crane boom |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1376427A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2362785A2 (en) * | 1976-08-25 | 1978-03-24 | Orenstein & Koppel Ag | TELESCOPIC BOOM FOR SELF-PROPELLED CRANES |
-
1973
- 1973-06-07 GB GB2721773A patent/GB1376427A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2362785A2 (en) * | 1976-08-25 | 1978-03-24 | Orenstein & Koppel Ag | TELESCOPIC BOOM FOR SELF-PROPELLED CRANES |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |