GB545588A - Improvements in grab buckets - Google Patents
Improvements in grab bucketsInfo
- 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
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
- B66C3/12—Grabs 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.
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) |
-
1941
- 1941-02-07 GB GB162741A patent/GB545588A/en not_active Expired
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