GB2022055A - Improvements in Safety Devices for Load Lifting and Lowering Apparatus - Google Patents
Improvements in Safety Devices for Load Lifting and Lowering ApparatusInfo
- Publication number
- GB2022055A GB2022055A GB7917610A GB7917610A GB2022055A GB 2022055 A GB2022055 A GB 2022055A GB 7917610 A GB7917610 A GB 7917610A GB 7917610 A GB7917610 A GB 7917610A GB 2022055 A GB2022055 A GB 2022055A
- Authority
- GB
- United Kingdom
- Prior art keywords
- runner
- pawls
- block
- levers
- pair
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
- B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
- B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
- B66B5/18—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces
- B66B5/20—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces by means of rotatable eccentrically-mounted members
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/02—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms suspended from ropes, cables, or chains or screws and movable along pillars
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Types And Forms Of Lifts (AREA)
- Maintenance And Inspection Apparatuses For Elevators (AREA)
Abstract
A safety device for load lifting and lowering apparatus of the kind comprising a pair of parallel spaced apart upright guide members (10) of hollow section along each of which travels a runner (12) supporting, via a support passing through a slot (11) a load carrier, a driving cable being connected to each runner to raise and lower it, comprises a pair of pawls (14) pivoted on the runner (12) and a block (19) slidable relative to the pawls and carrying a shaft (22) to which the cable is connected. A pair of levers (35, 36) pivotally mounted on a shaft (37) secured to the pawls (14) are each connected by a pin-and-slot connection (38, 40) to the block (19). Each pawl (14) has a tapered edge (17) providing a recess (42) in which a roller (41), in normal operation, rests since tension in the cable separates the block (19) from the runner (12) and maintains the levers (35, 36) in the position shown. When the tension is released, springs (23, 24) urge the block (19) towards the runner (12) thereby rotating the levers (35, 36) and moving the roller (41) upwardly so that the pawls (14) are jammed against the walls of the guide member (10). <IMAGE>
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB7917610A GB2022055B (en) | 1978-05-31 | 1979-05-21 | Safety devices for load lifting and lowering apparatus |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB2497378 | 1978-05-31 | ||
GB7917610A GB2022055B (en) | 1978-05-31 | 1979-05-21 | Safety devices for load lifting and lowering apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2022055A true GB2022055A (en) | 1979-12-12 |
GB2022055B GB2022055B (en) | 1982-06-16 |
Family
ID=26257412
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB7917610A Expired GB2022055B (en) | 1978-05-31 | 1979-05-21 | Safety devices for load lifting and lowering apparatus |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2022055B (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2122167A (en) * | 1982-06-23 | 1984-01-11 | Primrose Third Axle Company Li | Safety stop |
GB2132986A (en) * | 1983-01-11 | 1984-07-18 | Ross & Bonnyman Eng Ltd | Safety device |
GB2142904A (en) * | 1983-06-15 | 1985-01-30 | Litton Systems Inc | Safety brake for vertical lift |
GB2233959A (en) * | 1989-05-16 | 1991-01-23 | Del Equipment Ltd | Power operated hoist with safety locking mechanism |
EP0621223A2 (en) * | 1993-04-23 | 1994-10-26 | SOILMEC S.p.A. | Anti-fall safety device |
-
1979
- 1979-05-21 GB GB7917610A patent/GB2022055B/en not_active Expired
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2122167A (en) * | 1982-06-23 | 1984-01-11 | Primrose Third Axle Company Li | Safety stop |
GB2132986A (en) * | 1983-01-11 | 1984-07-18 | Ross & Bonnyman Eng Ltd | Safety device |
GB2142904A (en) * | 1983-06-15 | 1985-01-30 | Litton Systems Inc | Safety brake for vertical lift |
GB2233959A (en) * | 1989-05-16 | 1991-01-23 | Del Equipment Ltd | Power operated hoist with safety locking mechanism |
GB2233959B (en) * | 1989-05-16 | 1993-08-04 | Del Equipment Ltd | Power operated hoist |
EP0621223A2 (en) * | 1993-04-23 | 1994-10-26 | SOILMEC S.p.A. | Anti-fall safety device |
EP0621223A3 (en) * | 1993-04-23 | 1995-11-02 | Soilmec Spa | Anti-fall safety device. |
Also Published As
Publication number | Publication date |
---|---|
GB2022055B (en) | 1982-06-16 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |