GB1403124A - Air hoist with an overload protection device - Google Patents

Air hoist with an overload protection device

Info

Publication number
GB1403124A
GB1403124A GB985573A GB985573A GB1403124A GB 1403124 A GB1403124 A GB 1403124A GB 985573 A GB985573 A GB 985573A GB 985573 A GB985573 A GB 985573A GB 1403124 A GB1403124 A GB 1403124A
Authority
GB
United Kingdom
Prior art keywords
valve
motor
hoist
brake
blow
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
GB985573A
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.)
Atlas Copco AB
Original Assignee
Atlas Copco AB
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 Atlas Copco AB filed Critical Atlas Copco AB
Publication of GB1403124A publication Critical patent/GB1403124A/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
    • B66D3/00—Portable or mobile lifting or hauling appliances
    • 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
    • B66D3/18—Power-operated hoists
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • General Details Of Gearings (AREA)
  • Control And Safety Of Cranes (AREA)
  • Self-Closing Valves And Venting Or Aerating Valves (AREA)

Abstract

1403124 Hoists ATLAS COPCO AB 28 Feb 1973 [6 March 1972] 9855/73 Heading B8B An air hoist comprises a winching drum 14 reversibly driven by an air motor 13, and a normally closed blow off valve 51 to reduce the pressure of air supplied to the motor in response to a device sensing the hoist load reaching a predetermined magnitude. The blow off valve, comprising a piston spring biased in a cylinder to close on a seat, has its cylinder communicating with a chamber below a valve seat associated with the hoist suspension hook 12 whereby when an adjustable preset loading of the hook valve is exceeded, by excess load on the hoist, the hook valve opens to exhaust the blow off valve cylinder whereupon the blow off valve opens to slow down or stop the air motor 13. The blow off valve is also opened momentarily when a load is hoisted suddenly, to provide a gentle raising of the load. The drum 14 is driven from the motor through planetry gearing 16 and the drive shaft extends into a band brake arrangement. The brake drum for the band brake is coupled to the drive shaft through a one way clutch which permits hoisting but prevents lowering of the hoist whilst the brake is applied. The brake application is controlled simultaneously with control of the motor 13 by a handle 45 suspended on ropes 43 from a yoke 40, which through drive bars 29 releases the brake as a selector valve is moved to cause drive of the motor 13 in a hoist lowering direction, but retains the brake in the applied condition when the hoist raising direction of the motor is selected. The motor is de-energized if the load hook 18 is raised into abutment with the yoke 40.
GB985573A 1972-03-06 1973-02-28 Air hoist with an overload protection device Expired GB1403124A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE02816/72A SE357539B (en) 1972-03-06 1972-03-06

Publications (1)

Publication Number Publication Date
GB1403124A true GB1403124A (en) 1975-08-13

Family

ID=20260770

Family Applications (1)

Application Number Title Priority Date Filing Date
GB985573A Expired GB1403124A (en) 1972-03-06 1973-02-28 Air hoist with an overload protection device

Country Status (8)

Country Link
US (1) US3876182A (en)
JP (1) JPS5632237B2 (en)
BR (1) BR7301626D0 (en)
FR (1) FR2174989B1 (en)
GB (1) GB1403124A (en)
IT (1) IT977490B (en)
SE (1) SE357539B (en)
ZA (1) ZA731357B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0040184A2 (en) * 1980-03-28 1981-11-18 Atlas Copco Aktiebolag Pneumatic hoist

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4165863A (en) * 1976-09-15 1979-08-28 Columbus Mckinnon Corporation Hoist system
US4283722A (en) * 1977-11-11 1981-08-11 Kabushiki Kaisha Kito Overload indication device for a lever hoist
JPS55117483U (en) * 1979-02-07 1980-08-19
US7159772B2 (en) * 2001-07-24 2007-01-09 Vbs, Inc. Apparatus and method for mounting an RF tag on a conveyor trolley
US6708712B2 (en) 2001-10-04 2004-03-23 Illinois Tool Works Inc. Pressure regulator utilizing a disc spring
CN108675181B (en) * 2018-08-09 2024-02-02 重庆维大力起重设备有限公司 Hand pulling block
CN111017778A (en) * 2019-12-19 2020-04-17 国网山东省电力公司莘县供电公司 Quick installation lifting appliance for cross arm of power distribution network

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3125200A (en) * 1964-03-17 Pneumatic hoist
US1561722A (en) * 1924-04-10 1925-11-17 Ingersoll Rand Co Motor
US2566036A (en) * 1946-02-15 1951-08-28 Keller Tool Co Hoist brake mechanism
US3062344A (en) * 1959-12-15 1962-11-06 Manning Maxwell & Moore Inc Power hoist with manual operating device
US3384350A (en) * 1966-09-22 1968-05-21 Zimmerman D W Mfg Pneumatically-operated device for manipulating heavy loads
US3433332A (en) * 1967-04-07 1969-03-18 Eaton Yale & Towne Hoist overload preventing device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0040184A2 (en) * 1980-03-28 1981-11-18 Atlas Copco Aktiebolag Pneumatic hoist
EP0040184A3 (en) * 1980-03-28 1982-02-24 Atlas Copco Aktiebolag Pneumatic hoist

Also Published As

Publication number Publication date
IT977490B (en) 1974-09-10
ZA731357B (en) 1973-11-28
SE357539B (en) 1973-07-02
FR2174989A1 (en) 1973-10-19
DE2310558B2 (en) 1977-04-07
DE2310558A1 (en) 1973-09-20
JPS5632237B2 (en) 1981-07-27
AU5282173A (en) 1974-09-05
JPS48100849A (en) 1973-12-19
FR2174989B1 (en) 1978-08-04
US3876182A (en) 1975-04-08
BR7301626D0 (en) 1974-05-30

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee