GB1251536A - - Google Patents

Info

Publication number
GB1251536A
GB1251536A GB1251536DA GB1251536A GB 1251536 A GB1251536 A GB 1251536A GB 1251536D A GB1251536D A GB 1251536DA GB 1251536 A GB1251536 A GB 1251536A
Authority
GB
United Kingdom
Prior art keywords
rope
valve
fluid
circuit
pulleys
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
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 filed Critical
Publication of GB1251536A publication Critical patent/GB1251536A/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
    • B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
    • B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
    • B66D5/026—Fluid-resistance brakes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D57/00—Liquid-resistance brakes; Brakes using the internal friction of fluids or fluid-like media, e.g. powders
    • F16D57/06—Liquid-resistance brakes; Brakes using the internal friction of fluids or fluid-like media, e.g. powders comprising a pump circulating fluid, braking being effected by throttling of the circulation

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Transmission Device (AREA)

Abstract

1,251,536. Pulley arrangements; braking. NIHON REGULATOR K.K. 24 Dec., 1968 [28 Dec., 1967], No. 61466/68. Heading B8B. [Also in Division F2] In a rope and pulley system for the free descent of a load from an elevated position, the speed of descent is maintained substantially constant by a unit comprising a gear pump 28, 30 in a closed hydraulic circuit and driven by the rope 32, passing around pulleys 26, and a flow control valve 52 in the circuit for maintaining the flow rate substantially constant irrespective of the torque applied to the gear pump. The fluid pressure on either side of a construction 46 in the fluid circuit between the supply and discharge conduits 40, 42 for the pump is sensed by supplying fluid from each side of the orifice 46 to one end 54, 56 of the spring-centred spool valve 52, and any pressure differential causes the valve 52 to control the fluid flow until the pressures are balanced. A shut-off valve 44 in the closed circuit acts as a brake for the pulley system and may be operated by a load on the rope 32 as it reaches the ground. The rope 32 passes over the two pulleys 26 and over an angled pulley 34 therebetween further rollers, not shown, pressing the rope into engagement with the pulleys 26.
GB1251536D 1967-12-28 1968-12-24 Expired GB1251536A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8384067 1967-12-28

Publications (1)

Publication Number Publication Date
GB1251536A true GB1251536A (en) 1971-10-27

Family

ID=13813886

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1251536D Expired GB1251536A (en) 1967-12-28 1968-12-24

Country Status (1)

Country Link
GB (1) GB1251536A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2243295A (en) * 1989-07-08 1991-10-30 Ivor James Morris Device for assisting escape from a building
GB2257690A (en) * 1991-07-08 1993-01-20 Maria Del Mar Segura Salvador Braking roll spindles during unwinding
US5467934A (en) * 1991-07-08 1995-11-21 Del Mar Segura Salvador; Maria Braking system for bobbin-holder supports
GB2319232A (en) * 1996-11-11 1998-05-20 Gordon Warwick Bendall Free fall simulator
EP2033863A1 (en) * 2007-09-04 2009-03-11 Technology from Ideas Hydrostatic braking system
US20190048948A1 (en) * 2016-04-13 2019-02-14 Yibo ZENG Liquid-resistance braking system
CN115010031A (en) * 2022-08-08 2022-09-06 河南华工实业集团有限公司 Can prevent hoist reel of quick unwrapping wire

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2243295A (en) * 1989-07-08 1991-10-30 Ivor James Morris Device for assisting escape from a building
GB2257690A (en) * 1991-07-08 1993-01-20 Maria Del Mar Segura Salvador Braking roll spindles during unwinding
FR2681844A1 (en) * 1991-07-08 1993-04-02 Segura Salvador Maria Del Mar BRAKING SYSTEM FOR SPOOL HOLDER.
BE1006540A5 (en) * 1991-07-08 1994-10-11 Maria Del Mar Segura Salvador Braking system support for spool.
US5467934A (en) * 1991-07-08 1995-11-21 Del Mar Segura Salvador; Maria Braking system for bobbin-holder supports
GB2319232A (en) * 1996-11-11 1998-05-20 Gordon Warwick Bendall Free fall simulator
EP2033863A1 (en) * 2007-09-04 2009-03-11 Technology from Ideas Hydrostatic braking system
WO2009030712A2 (en) * 2007-09-04 2009-03-12 Technology From Ideas Hydrostatic braking system
WO2009030712A3 (en) * 2007-09-04 2009-06-04 Technology From Ideas Hydrostatic braking system
US8439784B2 (en) 2007-09-04 2013-05-14 Technology From Ideas, Limited Braking system
US20190048948A1 (en) * 2016-04-13 2019-02-14 Yibo ZENG Liquid-resistance braking system
US10794438B2 (en) * 2016-04-13 2020-10-06 Yibo ZENG Liquid-resistance braking system
CN115010031A (en) * 2022-08-08 2022-09-06 河南华工实业集团有限公司 Can prevent hoist reel of quick unwrapping wire

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Legal Events

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