GB540082A - An improved grab for working bulk cargoes and the like - Google Patents
An improved grab for working bulk cargoes and the likeInfo
- Publication number
- GB540082A GB540082A GB25242/39A GB2524239A GB540082A GB 540082 A GB540082 A GB 540082A GB 25242/39 A GB25242/39 A GB 25242/39A GB 2524239 A GB2524239 A GB 2524239A GB 540082 A GB540082 A GB 540082A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grab
- hoisting
- rope
- buckets
- lever
- 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
540,082. Grabs. REYNOLDS, E. Sept. 7, 1939, No. 25242. Convention date, Sept. 23, 1938. [Class 78 (iv)] A pivoted slotted lever 17 on the lead frame of a doublechain grab, which is actuated and controlled directly by the joint action of the hoisting and opening ropes, permits lowering with the buckets open. When the grab rests on the heap of material, the lever 17 falls over by gravity into the position shown in Fig. 5 in which the button 20 passes freely through the slot when the hoisting rope 19 is tensioned to close the buckets and hoist the grab. On transferring the pull to the opening rope 23 and paying out the hoisting-rope to discharge the load the lever 17 is swung about the pivot 26. In this position the button 20 can pass downwards through the slot as the buckets open, but is arrested when the hoisting-rope is re-tensioned. Thus the grab can be lowered with open buckets by paying out both ropes 19, 23 under tension until it rests on the heap, after which the cycle of operations is repeated.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NZ540082X | 1938-09-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB540082A true GB540082A (en) | 1941-10-06 |
Family
ID=19915919
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25242/39A Expired GB540082A (en) | 1938-09-23 | 1939-09-07 | An improved grab for working bulk cargoes and the like |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB540082A (en) |
Cited By (1)
| 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 |
-
1939
- 1939-09-07 GB GB25242/39A patent/GB540082A/en not_active Expired
Cited By (1)
| 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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