GB868451A - Improvements relating to grabs - Google Patents

Improvements relating to grabs

Info

Publication number
GB868451A
GB868451A GB1969358A GB1969358A GB868451A GB 868451 A GB868451 A GB 868451A GB 1969358 A GB1969358 A GB 1969358A GB 1969358 A GB1969358 A GB 1969358A GB 868451 A GB868451 A GB 868451A
Authority
GB
United Kingdom
Prior art keywords
rope
plate
grab
opening movement
pivoted
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
GB1969358A
Inventor
Albert Child
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 Brothers Ltd
Original Assignee
Priestman Brothers 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 Brothers Ltd filed Critical Priestman Brothers Ltd
Priority to GB1969358A priority Critical patent/GB868451A/en
Publication of GB868451A publication Critical patent/GB868451A/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
    • B66C3/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith and intended primarily for transmitting lifting forces to loose materials; Grabs
    • B66C3/06—Grabs actuated by a single rope or chain

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Load-Engaging Elements For Cranes (AREA)

Abstract

868,451. Grabs for handling materials. PRIESTMAN BROS. Ltd. Sept. 4, 1959 [June 19, 1958], No. 19693/58. Class 78 (4). In a grab having two buckets 1, 2, Fig. 1, pivoted together at 3, the opening movement is brought about by a pair of links 8, 9, connected through a common operating member 17 which may be moved upwards by means of ropes 18, 19 which assist in the initial opening movement of the grab by pressing on the curved surfaces of plates 40, 41 which move the respective buckets and are so disposed that the length of rope between each member and respective rope anchors 26, 27 is constant during the initial opening movement. When the grab is closed the rope 18 engages the plate 40, Fig. 4, and the rope 19 engages a similar plate 41 (not shown), the plate 40 being carried by an arm 42 pivoted at 47. Thus, the length of rope between the plate 40 and the anchor 26 remains constant during the initial opening movement. The plate 40 is formed as a complete loop, which receives a roller 30 pivoted to the member 8 by a pin 12, and has a groove for engaging the rope. Each anchor comprises a wedge-shaped element 55 round which the rope passes, the element being pulled into a tapered socket 56 of a block 57. The invention may be applied to the grab shown in Specification 722,138; in this case only the member 40 is provided, this being located at a pin 9 (not shown), for co-operation with a rope 13 (not shown).
GB1969358A 1958-06-19 1958-06-19 Improvements relating to grabs Expired GB868451A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1969358A GB868451A (en) 1958-06-19 1958-06-19 Improvements relating to grabs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1969358A GB868451A (en) 1958-06-19 1958-06-19 Improvements relating to grabs

Publications (1)

Publication Number Publication Date
GB868451A true GB868451A (en) 1961-05-17

Family

ID=10133638

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1969358A Expired GB868451A (en) 1958-06-19 1958-06-19 Improvements relating to grabs

Country Status (1)

Country Link
GB (1) GB868451A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2126981A (en) * 1982-09-13 1984-04-04 Frankignoul Pieux Armes Improvements in or relating to grab bucket apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2126981A (en) * 1982-09-13 1984-04-04 Frankignoul Pieux Armes Improvements in or relating to grab bucket apparatus

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