GB545588A - Improvements in grab buckets - Google Patents

Improvements in grab buckets

Info

Publication number
GB545588A
GB545588A GB162741A GB162741A GB545588A GB 545588 A GB545588 A GB 545588A GB 162741 A GB162741 A GB 162741A GB 162741 A GB162741 A GB 162741A GB 545588 A GB545588 A GB 545588A
Authority
GB
United Kingdom
Prior art keywords
grab
rope
weight
frame
block
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
GB162741A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB162741A priority Critical patent/GB545588A/en
Publication of GB545588A publication Critical patent/GB545588A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66CCRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C3/00Load-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
    • B66C3/12Grabs actuated by two or more ropes

Landscapes

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

Abstract

545,588. Grab buckets. SMITH, T. Feb. 7, 1941, No. 1627. [Class 78 (iv.)] In a two-rope grab the opening rope or chain p is secured to a yoke o hinged at h<SP>1</SP> to an upper frame or axle g having hinges h for the bucket links j. The frame g has a metal block a at its centre provided with a recess adapted to receive a weight b on the lifting and closing rope b<SP>1</SP> b the lower part b<SP>2</SP> of this rope passing through the block a and being secured to a lower frame or axle l at n after passing over pulleys m, m<SP>1</SP> on the lower and upper frames. The grab jaws k are hinged at l<SP>1</SP> to the frame l. In the closed position, shown in Fig. 2, the grab is suspended by the rope b<SP>1</SP>, b<SP>2</SP> and the weight b is above the block a. When the grab is suspended by the opening chain p and the rope b is slackened the frame l is lowered and the grab opens. The weight b thus descends into the recess in block a and is retained there by pawls d<SP>1</SP> controlled by weights e<SP>1</SP>, so as to lock the grab in the open position. When the grab is lowered on to the ground, the chain p being slack the yoke o swings about its pivots h<SP>1</SP> and a bar o<SP>1</SP> on the yoke depresses pins f<SP>1</SP> on sectors f so that these sectors are rotated and turn the pawls d' until their flat sides are vertical and release the weight b so that a pull on the rope b<SP>1</SP> raises the weight and closes the grab. Strengthening plates k<SP>2</SP> are secured to the bucket jaws.
GB162741A 1941-02-07 1941-02-07 Improvements in grab buckets Expired GB545588A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB162741A GB545588A (en) 1941-02-07 1941-02-07 Improvements in grab buckets

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB162741A GB545588A (en) 1941-02-07 1941-02-07 Improvements in grab buckets

Publications (1)

Publication Number Publication Date
GB545588A true GB545588A (en) 1942-06-03

Family

ID=9725215

Family Applications (1)

Application Number Title Priority Date Filing Date
GB162741A Expired GB545588A (en) 1941-02-07 1941-02-07 Improvements in grab buckets

Country Status (1)

Country Link
GB (1) GB545588A (en)

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