GB988036A - Improvements relating to civil engineering machines - Google Patents

Improvements relating to civil engineering machines

Info

Publication number
GB988036A
GB988036A GB1617063A GB1617063A GB988036A GB 988036 A GB988036 A GB 988036A GB 1617063 A GB1617063 A GB 1617063A GB 1617063 A GB1617063 A GB 1617063A GB 988036 A GB988036 A GB 988036A
Authority
GB
United Kingdom
Prior art keywords
rope
grab
clutch
drum
drums
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
GB1617063A
Inventor
Leslie Bulleyment
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 GB1617063A priority Critical patent/GB988036A/en
Publication of GB988036A publication Critical patent/GB988036A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/46—Dredgers; Soil-shifting machines mechanically-driven with reciprocating digging or scraping elements moved by cables or hoisting ropes ; Drives or control devices therefor
    • E02F3/47—Dredgers; Soil-shifting machines mechanically-driven with reciprocating digging or scraping elements moved by cables or hoisting ropes ; Drives or control devices therefor with grab buckets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
    • B66C23/18—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes
    • B66C23/36—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes specially adapted for use in particular purposes mounted on road or rail vehicles; Manually-movable jib-cranes for use in workshops; Floating cranes
    • 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
    • B66C3/125—Devices for control
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C2700/00—Cranes
    • B66C2700/03—Cranes with arms or jibs; Multiple cranes
    • B66C2700/0321—Travelling cranes
    • B66C2700/0357—Cranes on road or off-road vehicles, on trailers or towed vehicles; Cranes on wheels or crane-trucks
    • B66C2700/0364—Cranes on road or off-road vehicles, on trailers or towed vehicles; Cranes on wheels or crane-trucks with a slewing arm
    • B66C2700/0371—Cranes on road or off-road vehicles, on trailers or towed vehicles; Cranes on wheels or crane-trucks with a slewing arm on a turntable

Abstract

988,036. Grab-machine. PRIESTMAN BROS Ltd. March 24, 1964 [April 24, 1963], No. 16170/63. Heading E1F. A load carrier 8 (Fig. I) is steadied by a bridle rope 21, which is wound on a drum 22 driven by a slipping clutch 29, 36, 39 (Fig. III) to keep rope 21 taut, the loading on the clutch being automatically reduced when carrier 8 is lowered so that drum 22 rotates readily against the drive. Clutch disc 36 is carried by shaft 33, rotated by gear 23. Drum 22 is urged rightwards by a spring 42, mounted on spindle 47 which is attached to a rightwardly urged diaphragm in pneumatic chamber 48. When grab 8 (Fig. II, not shown) is being raised drums 13, 16 are driven by chain 19 and gear wheels 17, 18 of slightly different, diameters, whereby hoist rope 15 bears the weight of grab 8 and hold rope 11 is kept just taut. When grab 8 is lowered the clutches between gears 17, 18 and drums 13, 16 are disconnected and a third clutch connects the drums with a one-to-one gear ratio so that they lower at the same speed. This third clutch is pneumatically controlled through line 57 and when it is engaged a valve 56 is controlled to vent chamber 48, previously pressurized so as to urge spindle 47 rightwards, to atmosphere, so that only spring 42 now urges drum 22 rightwards and clutch 29, 36, 39 slips more readily. The grab 8 (Fig. II, not shown) is opened and closed by paying out and taking in hoist rope 15 relative to hold rope 11. Each bucket 9 of the grab is connected to one branch 26 of bridle rope 21. Jib 3 is luffed by rope 4, and turntable 2 is mounted on a mobile chassis or on a dredger. Specifications 536,952 and 957,082 are referred to.
GB1617063A 1963-04-24 1963-04-24 Improvements relating to civil engineering machines Expired GB988036A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1617063A GB988036A (en) 1963-04-24 1963-04-24 Improvements relating to civil engineering machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1617063A GB988036A (en) 1963-04-24 1963-04-24 Improvements relating to civil engineering machines

Publications (1)

Publication Number Publication Date
GB988036A true GB988036A (en) 1965-03-31

Family

ID=10072438

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1617063A Expired GB988036A (en) 1963-04-24 1963-04-24 Improvements relating to civil engineering machines

Country Status (1)

Country Link
GB (1) GB988036A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102605817A (en) * 2012-03-24 2012-07-25 北京市三一重机有限公司 Grab bucket grooving machine for continuous wall

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102605817A (en) * 2012-03-24 2012-07-25 北京市三一重机有限公司 Grab bucket grooving machine for continuous wall

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