GB954905A - Improvements in overload control means for cranes - Google Patents

Improvements in overload control means for cranes

Info

Publication number
GB954905A
GB954905A GB3044759A GB3044759A GB954905A GB 954905 A GB954905 A GB 954905A GB 3044759 A GB3044759 A GB 3044759A GB 3044759 A GB3044759 A GB 3044759A GB 954905 A GB954905 A GB 954905A
Authority
GB
United Kingdom
Prior art keywords
reservoir
cylinder
overload
piston
crane
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
GB3044759A
Inventor
Stafford Hall
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.)
Clyde Crane & Booth Ltd
Original Assignee
Clyde Crane & Booth 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 Clyde Crane & Booth Ltd filed Critical Clyde Crane & Booth Ltd
Priority to GB3044759A priority Critical patent/GB954905A/en
Publication of GB954905A publication Critical patent/GB954905A/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
    • B66D1/58—Safety gear responsive to excess of load

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

954,905. Overload safety devices for cranes. CLYDE CRANE & BOOTH Ltd. Sept. 6, 1960 [Sept. 7, 1959], No. 30447/59. Heading B8B. An overload prevention device comprises a cylinder 2 attached to a crane structure 3 and a piston 5 to which is connected the load, a predetermined fluid pressure, controlled by a device 12, being maintained below the piston by a compressor 8 and a reservoir 7. In operation the air pressure in the cylinder 2 and the reservoir 7, the volume of which may be variable, is raised until it equals the maximum permissible load of the crane, the compressor motor 9 being switched off by the pressure sensitive device 12 when this pressure is reached. When an overload occurs the piston 5 is drawn downwards from the top of the cylinder 3 and only moves back when the overload is removed. In a second embodiment liquid occupies the space in the cylinder and part of the reservoir, compressed air occupying the rest of the reservoir.
GB3044759A 1959-09-07 1959-09-07 Improvements in overload control means for cranes Expired GB954905A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3044759A GB954905A (en) 1959-09-07 1959-09-07 Improvements in overload control means for cranes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3044759A GB954905A (en) 1959-09-07 1959-09-07 Improvements in overload control means for cranes

Publications (1)

Publication Number Publication Date
GB954905A true GB954905A (en) 1964-04-08

Family

ID=10307837

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3044759A Expired GB954905A (en) 1959-09-07 1959-09-07 Improvements in overload control means for cranes

Country Status (1)

Country Link
GB (1) GB954905A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2639132A1 (en) * 1988-11-14 1990-05-18 Feralco Convoyeurs Cie Load limiter, particularly for an elevator (lifting device) controlled by a chain or the like

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2639132A1 (en) * 1988-11-14 1990-05-18 Feralco Convoyeurs Cie Load limiter, particularly for an elevator (lifting device) controlled by a chain or the like

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