ES440997A3 - Overhead crane - Google Patents

Overhead crane

Info

Publication number
ES440997A3
ES440997A3 ES440997A ES440997A ES440997A3 ES 440997 A3 ES440997 A3 ES 440997A3 ES 440997 A ES440997 A ES 440997A ES 440997 A ES440997 A ES 440997A ES 440997 A3 ES440997 A3 ES 440997A3
Authority
ES
Spain
Prior art keywords
load
rope
safety
load block
sheave
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
Application number
ES440997A
Other languages
Spanish (es)
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.)
Whiting Corp
Original Assignee
Whiting Corp
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 Whiting Corp filed Critical Whiting Corp
Publication of ES440997A3 publication Critical patent/ES440997A3/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/54—Safety gear
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00—Portable or mobile lifting or hauling appliances
    • B66D3/04—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage
    • B66D3/06—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage with more than one pulley
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D2700/00—Capstans, winches or hoists
    • B66D2700/02—Hoists or accessories for hoists
    • B66D2700/026—Pulleys, sheaves, pulley blocks or their mounting
    • B66D2700/028—Pulley blocks with multiple sheaves

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Jib Cranes (AREA)
  • Control And Safety Of Cranes (AREA)

Abstract

An overhead crane characterized by its redundant or double-safe features. The crane has two separate ropes with one end of each rope attached to the drum and the other end attached to an equalizer. Each rope, intermediate its opposite ends, is reeved over sheaves in the sheave nest and on the load block in such manner that each rope provides at least four active parts (i.e., load-supporting lines) running to the four horizontal quadrants of the load block with respect to the vertical center line therethrough. With this system and arrangement the load block will be supported by two independent sets having at least four active rope parts or lines of support in each set in such a manner that if a rope breaks or fails for any reason, at least one remaining complete set of at least four active parts provided by the undamaged rope will assume full support with little or no appreciable impact load occurring and with only small and acceptable swinging or twisting movement imparted to the lead. Additional redundancy and double-safety is provided by: constructing the crane hook so it has two separate load paths into the load block having two complete gear trains between the hoist motor and the drum assembly with each being capable of handling the rated load with a normal factor of safety having safety lugs to catch the drum hubs in case of shaft failure having safety retainers for all sheaves in the sheave nest and in the load block to sustain the load upon failure of any sheave or its supporting shaft and, having the equalizer bar boxed or caged in with load supporting members and provided with bumpers at opposite ends.
ES440997A 1972-05-22 1975-09-16 Overhead crane Expired ES440997A3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US25572072A 1972-05-22 1972-05-22

Publications (1)

Publication Number Publication Date
ES440997A3 true ES440997A3 (en) 1977-06-16

Family

ID=22969584

Family Applications (1)

Application Number Title Priority Date Filing Date
ES440997A Expired ES440997A3 (en) 1972-05-22 1975-09-16 Overhead crane

Country Status (2)

Country Link
US (1) US3786935A (en)
ES (1) ES440997A3 (en)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4027800A (en) * 1975-12-03 1977-06-07 The Alliance Machine Company Gantry crane with plural hoist means
US4069921A (en) * 1976-01-30 1978-01-24 Harnischfeger Corporation Overhead crane including a single failure proof hoist
US4073476A (en) * 1976-05-24 1978-02-14 Kranco, Inc. Overhead crane with redundant safety features
US4214664A (en) * 1978-08-24 1980-07-29 The Alliance Machine Company Crane safety reeving
DE2853404C2 (en) * 1978-12-11 1984-10-04 PHB Weserhütte AG, 5000 Köln Safety block of a traveling crane
DE2907963C2 (en) * 1979-03-01 1982-08-12 Gg. Noell GmbH, 8700 Würzburg Bottom block for a hoist
US4597497A (en) * 1981-12-16 1986-07-01 Koehring Morgan Hoist with redundant safety features
US4653653A (en) * 1985-08-27 1987-03-31 The Alliance Machine Company Hoisting systems
DE3830429C2 (en) * 1988-09-07 1996-05-30 Rexroth Mannesmann Gmbh Lifting device for a load hanging on several lifting cables, in particular a container crane
US5076544A (en) * 1990-06-15 1991-12-31 Harnischfeger Corporation Connecting apparatus of a hoist drum
CA2078304C (en) * 1991-09-20 1998-05-05 Terry S. Casavant Easily removable sheave assembly
FR2693447B1 (en) * 1992-07-07 1994-09-30 Neyrpic Framatome Mecanique Load handling device.
FI104816B (en) * 1997-09-24 2000-04-14 Kci Kone Cranes Int Oy Arrangement for damping the overload and thrust movement energy directed against the lifting tackle of a lifting crane
AUPP212298A0 (en) 1998-03-04 1998-03-26 Otis Elevator Company Rotatable hitch for securing a lift sheave to a frame element
US20030006207A1 (en) * 2001-06-14 2003-01-09 Oddvar Norheim Single failure proof reeving load transfer system
US7293670B2 (en) * 2004-09-08 2007-11-13 Mhe Technologies, Inc. Upper block
US7562430B2 (en) * 2005-01-10 2009-07-21 Mhe Technologies, Inc. Pin changing device and method
US20120145664A1 (en) * 2010-12-09 2012-06-14 Mi-Jack Products, Inc. Redundant Hoist Rope System
CN103054511A (en) * 2012-12-29 2013-04-24 平湖普英特高层设备有限公司 Groove jumping preventing device of lifting mechanism of window cleaning machine
CN103040398A (en) * 2012-12-29 2013-04-17 平湖普英特高层设备有限公司 Rope breakage proofing mechanism for window cleaning equipment
US20180162702A1 (en) * 2016-12-09 2018-06-14 Whiting Corporation Variable speed single failure proof lifting device
CN108750988B (en) * 2018-06-14 2019-12-10 中国十七冶集团有限公司 Multifunctional guiding vehicle for eccentric three-wheel winch
CN109534166B (en) * 2018-11-30 2020-06-30 中联重科股份有限公司 Control oil circuit and engineering machinery
US11312598B2 (en) * 2019-03-18 2022-04-26 Wenger Corporation Hoist fleet assembly
NL2023056B1 (en) 2019-05-02 2020-11-23 Itrec Bv Energy storing crane, vessel provided therewith, and method for serving energy consuming equipment.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1765347A (en) * 1928-07-07 1930-06-17 Shepard Niles Crane & Hoist Co Crane hoist
US2276767A (en) * 1939-10-26 1942-03-17 George G Morin Safety pulley block
US2306055A (en) * 1940-10-24 1942-12-22 Robert J Harry Soaking pit crane
US2973942A (en) * 1958-08-18 1961-03-07 Morgan Engineering Co Multiple hoist apparatus
US2960310A (en) * 1959-04-10 1960-11-15 Alliance Machine Co Dual hook blocks
DE1237755B (en) * 1965-06-18 1967-03-30 Demag Zug Gmbh Rope suspension for hoists with eight or twelve-line load organ

Also Published As

Publication number Publication date
US3786935A (en) 1974-01-22

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19971103