GB1145606A - Lowerable a-frame assembly for mobile cranes and the like - Google Patents
Lowerable a-frame assembly for mobile cranes and the likeInfo
- Publication number
- GB1145606A GB1145606A GB13310/67A GB1331067A GB1145606A GB 1145606 A GB1145606 A GB 1145606A GB 13310/67 A GB13310/67 A GB 13310/67A GB 1331067 A GB1331067 A GB 1331067A GB 1145606 A GB1145606 A GB 1145606A
- Authority
- GB
- United Kingdom
- Prior art keywords
- links
- leg
- frame
- lowerable
- frame assembly
- 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
- B66C23/18—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 specially adapted for use in particular purposes
- B66C23/36—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 specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
-
- 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
-
- 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
- B66C2700/0321—Travelling cranes
- B66C2700/0357—Cranes on road or off-road vehicles, on trailers or towed vehicles; Cranes on wheels or crane-trucks
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
1,145,606. Cranes. RUSTON-BUCYRUS Ltd. 21 March, 1967 [18 April, 1966], No. 13310/67. Heading B8B. [Also in Divisions E1 and F2] An A-frame, e.g. for a crane or excavator, comprises a compression leg 10 and a tension leg 11 which are pivotally mounted at their lower ends on a frame 2, the leg 11 comprising rigid upper and lower links 13, 14 interconnected by a pin and inclined slot connection 21, 19 so that upon release of tension on the leg 11 the links 13, 14 move out of alignment and begin to fold together under gravity. When the links 13, 14 are aligned they are releasably locked in this position by a pin 24. Stops 25 may be provided to ensure that the links 13, 14 do not fold in the wrong direction and further stops or supports may be provided to support the A- frame when it is in its fully lowered position.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US543288A US3335877A (en) | 1966-04-18 | 1966-04-18 | Lowerable a-frame assembly for mobile cranes and the like |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1145606A true GB1145606A (en) | 1969-03-19 |
Family
ID=24167369
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB13310/67A Expired GB1145606A (en) | 1966-04-18 | 1967-03-21 | Lowerable a-frame assembly for mobile cranes and the like |
Country Status (2)
Country | Link |
---|---|
US (1) | US3335877A (en) |
GB (1) | GB1145606A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2328652A1 (en) * | 1975-10-23 | 1977-05-20 | Manitowoc Co | SET OF A MAST AND SELF-RIGHTING CRANE BOOM |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3977530A (en) * | 1974-06-13 | 1976-08-31 | The Manitowoc Company, Inc. | Crane with gantry backhitch and boom hoist assembly removable as a unit |
US4421241A (en) * | 1981-04-24 | 1983-12-20 | Fmc Corporation | Removable live mast and hoist unit |
US5443169A (en) * | 1992-09-15 | 1995-08-22 | The Manitowoc Company | Crane backhitch |
JP4770978B2 (en) * | 2009-07-16 | 2011-09-14 | コベルコクレーン株式会社 | Construction machine gantry structure |
CN102267668A (en) * | 2010-06-04 | 2011-12-07 | 上海三一科技有限公司 | Folding guide device of rear pull rod of A-shaped frame |
DE202019106512U1 (en) * | 2019-11-22 | 2021-02-26 | Liebherr-MCCtec Rostock GmbH | Crane with a jack |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3072265A (en) * | 1960-10-28 | 1963-01-08 | Manitowoc Engineering Corp | Boom rigging |
US3249238A (en) * | 1964-02-14 | 1966-05-03 | Bucyrus Erie Co | Boom comprised of sections of differing cross section having aligned elastic centers |
-
1966
- 1966-04-18 US US543288A patent/US3335877A/en not_active Expired - Lifetime
-
1967
- 1967-03-21 GB GB13310/67A patent/GB1145606A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2328652A1 (en) * | 1975-10-23 | 1977-05-20 | Manitowoc Co | SET OF A MAST AND SELF-RIGHTING CRANE BOOM |
Also Published As
Publication number | Publication date |
---|---|
US3335877A (en) | 1967-08-15 |
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