GB2012719A - Crane safety device - Google Patents

Crane safety device

Info

Publication number
GB2012719A
GB2012719A GB7900468A GB7900468A GB2012719A GB 2012719 A GB2012719 A GB 2012719A GB 7900468 A GB7900468 A GB 7900468A GB 7900468 A GB7900468 A GB 7900468A GB 2012719 A GB2012719 A GB 2012719A
Authority
GB
United Kingdom
Prior art keywords
crane
rope
motor
safety device
given
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.)
Granted
Application number
GB7900468A
Other versions
GB2012719B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PRIESTMAN BROS Ltd
Original Assignee
PRIESTMAN BROS Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by PRIESTMAN BROS Ltd filed Critical PRIESTMAN BROS Ltd
Priority to GB7900468A priority Critical patent/GB2012719B/en
Publication of GB2012719A publication Critical patent/GB2012719A/en
Application granted granted Critical
Publication of GB2012719B publication Critical patent/GB2012719B/en
Expired legal-status Critical Current

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
    • B66C23/88—Safety gear
    • B66C23/90—Devices for indicating or limiting lifting moment

Abstract

A crane (1) has a hoist rope (7) which passes over a boom (6) to a drum (10) driven by a hydraulic motor (10') and including a brake. The crane (1) includes means (15) for releasing the brake when the free end (8) of the rope (7) is a given distance below the crane (1), and has means (16), Fig.2 (not shown), for relieving hydraulic pressure from the motor (10') in response to the horizontal radius of the free end (8) of the rope (7) so that at a given radius the motor (10') can lift only a given maximum load. <IMAGE>
GB7900468A 1978-01-19 1979-01-05 Crane safety device Expired GB2012719B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7900468A GB2012719B (en) 1978-01-19 1979-01-05 Crane safety device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB220478 1978-01-19
GB7900468A GB2012719B (en) 1978-01-19 1979-01-05 Crane safety device

Publications (2)

Publication Number Publication Date
GB2012719A true GB2012719A (en) 1979-08-01
GB2012719B GB2012719B (en) 1982-02-17

Family

ID=26237365

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7900468A Expired GB2012719B (en) 1978-01-19 1979-01-05 Crane safety device

Country Status (1)

Country Link
GB (1) GB2012719B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011101133A1 (en) * 2010-02-16 2011-08-25 Wolffkran Holding Ag Luffing-jib tower crane
CN108137298A (en) * 2015-10-02 2018-06-08 株式会社多田野 Derrick car

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011101133A1 (en) * 2010-02-16 2011-08-25 Wolffkran Holding Ag Luffing-jib tower crane
RU2521445C2 (en) * 2010-02-16 2014-06-27 Вольффкран Холдинг Аг Tower crane with luffing jib
AU2011217550B2 (en) * 2010-02-16 2014-08-21 Wolffkran Holding Ag Luffing-jib tower crane
US8955702B2 (en) 2010-02-16 2015-02-17 Wolffkran Holding Ag Luffing-jib tower crane with jib angle error control
CN108137298A (en) * 2015-10-02 2018-06-08 株式会社多田野 Derrick car
CN108137298B (en) * 2015-10-02 2019-10-25 株式会社多田野 Derrick car

Also Published As

Publication number Publication date
GB2012719B (en) 1982-02-17

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee