GB1409373A - Collapsible crane - Google Patents
Collapsible craneInfo
- Publication number
- GB1409373A GB1409373A GB196173A GB196173A GB1409373A GB 1409373 A GB1409373 A GB 1409373A GB 196173 A GB196173 A GB 196173A GB 196173 A GB196173 A GB 196173A GB 1409373 A GB1409373 A GB 1409373A
- Authority
- GB
- United Kingdom
- Prior art keywords
- jib
- mast
- horizontal
- bar
- raise
- 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
- B66C23/68—Jibs foldable or otherwise adjustable in configuration
-
- 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
- B66C23/26—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 for use on building sites; constructed, e.g. with separable parts, to facilitate rapid assembly or dismantling, for operation at successively higher levels, for transport by road or rail
- B66C23/34—Self-erecting cranes, i.e. with hoisting gear adapted for crane erection purposes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Transportation (AREA)
- Jib Cranes (AREA)
Abstract
1409373 Collapsible cranes POTAIN 15 Jan 1973 [14 Jan 1972] 1961/73 Heading B8B A collapsible crane comprises a frame 1 with an integral stand 2 provided at its top with a pivot pin 15 about which mast 3 can pivot between a vertical working position and the horizontal transport position shown, jib 4 also being horizontal in this position. A compensation bar 6 is pivoted at 7 to the stand 2 at its lower end, its upper end having rollers 8 engaging the underside of the jib 4. A cable 11 from lifting winch 5 on the frame 1 extends between sets of pulleys 9 and 10, respectively on the bar 6 adjacent the rollers 8 and on the upper face of the mast 3 between the pivot pin 15 and the top of the mast 3 where the jib 4 is pivoted. A flexible sling 12 is hooked at one end to the upper end of the bar 6 and at its other end to the stand 2. To erect the crane the cable 11 is wound in, the jib 4 being raised to about 20 degrees to the horizontal by the bar 6 swinging anticlockwise until it is locked by the sling 12 tightening. During this stage the mast 3 remains horizontal as the torque required to raise it is greater than that required to raise the jib 4. In this position, Fig. 2 (not shown), the pulleys 9, 10 are now out of their original horizontal position in line with the pivot pin 15 and have a sufficient lever arm to raise the mast 3. When the mast 3 has been raised sufficiently, by continuing to wind in the cable 11, for the jib 4 to become horizontal, Fig. 3 (not shown), a jib sling 13 tightens and during the final stages of erection the jib 4 leaves the rollers 8 and thereafter remains substantially horizontal.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7201979A FR2167464B1 (en) | 1972-01-14 | 1972-01-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1409373A true GB1409373A (en) | 1975-10-08 |
Family
ID=9092227
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB196173A Expired GB1409373A (en) | 1972-01-14 | 1973-01-15 | Collapsible crane |
Country Status (8)
Country | Link |
---|---|
US (1) | US3892316A (en) |
JP (1) | JPS4881251A (en) |
BR (1) | BR7300293D0 (en) |
DK (1) | DK137376B (en) |
FR (1) | FR2167464B1 (en) |
GB (1) | GB1409373A (en) |
IT (1) | IT978010B (en) |
NL (1) | NL7300396A (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3987594A (en) * | 1975-02-06 | 1976-10-26 | Clark Equipment Company | System and method for automatic unstowing and stowing of a crane boom |
ITMI20131510A1 (en) * | 2013-09-12 | 2015-03-13 | O M V Ohg Vicario S P A | SELF-LIFT CRANE WITHOUT COUNTERWEIGHT |
CN103787205B (en) * | 2014-02-27 | 2015-11-25 | 钦州学院 | Two-freedom two close cycles combination drive front-handling mobile crane |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1338439A (en) * | 1962-07-30 | 1963-09-27 | Weitz S A Ets | Crane assembly method |
FR89037E (en) * | 1965-11-09 | 1967-04-28 | Expl Des Etablissements Boilot | New bottom-turning tower crane assembly method |
GB1217450A (en) * | 1968-04-18 | 1970-12-31 | Edilmac Spa | Improvements in or relating to tower cranes |
-
1972
- 1972-01-14 FR FR7201979A patent/FR2167464B1/fr not_active Expired
-
1973
- 1973-01-03 IT IT19029/73A patent/IT978010B/en active
- 1973-01-11 NL NL7300396A patent/NL7300396A/xx not_active Application Discontinuation
- 1973-01-11 US US322664A patent/US3892316A/en not_active Expired - Lifetime
- 1973-01-12 BR BR73293A patent/BR7300293D0/en unknown
- 1973-01-12 DK DK18873AA patent/DK137376B/en unknown
- 1973-01-12 JP JP48006956A patent/JPS4881251A/ja active Pending
- 1973-01-15 GB GB196173A patent/GB1409373A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
IT978010B (en) | 1974-09-20 |
DE2300579A1 (en) | 1973-07-19 |
FR2167464B1 (en) | 1974-12-13 |
BR7300293D0 (en) | 1973-09-25 |
DE2300579B2 (en) | 1976-03-18 |
DK137376B (en) | 1978-02-27 |
FR2167464A1 (en) | 1973-08-24 |
NL7300396A (en) | 1973-07-17 |
DK137376C (en) | 1978-08-07 |
JPS4881251A (en) | 1973-10-31 |
US3892316A (en) | 1975-07-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PLNP | Patent lapsed through nonpayment of renewal fees |