GB2248596A - Decelerator apparatus - Google Patents
Decelerator apparatusInfo
- Publication number
- GB2248596A GB2248596A GB9110146A GB9110146A GB2248596A GB 2248596 A GB2248596 A GB 2248596A GB 9110146 A GB9110146 A GB 9110146A GB 9110146 A GB9110146 A GB 9110146A GB 2248596 A GB2248596 A GB 2248596A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pistons
- movement
- pegs
- retardation
- braking effect
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
- B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
- B66D5/026—Fluid-resistance brakes
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B1/00—Devices for lowering persons from buildings or the like
- A62B1/06—Devices for lowering persons from buildings or the like by making use of rope-lowering devices
- A62B1/08—Devices for lowering persons from buildings or the like by making use of rope-lowering devices with brake mechanisms for the winches or pulleys
- A62B1/12—Devices for lowering persons from buildings or the like by making use of rope-lowering devices with brake mechanisms for the winches or pulleys hydraulically operated
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Actuator (AREA)
- Bearings For Parts Moving Linearly (AREA)
- Pulleys (AREA)
- Emergency Lowering Means (AREA)
Abstract
This publication discloses a decelerator for the retardation of the movement of different kinds of loads, particularly for the retardation of a load-bearing rope or cable. The invention is based on producing the braking effect by way of throttling a fluid flow, which is forced into movement by means of two pistons (3). The pistons (3) are movable within a dual-chamber cylinder (19, 20) along the longitudinal axis of the cylinder. The pistons (3) are moved by means of pegs (9) protruding into sine-shaped meandering grooves (16) fabricated onto the surfaces of the pistons. The grooves (16) and the pegs (9) are arranged so that the movements of the pistons (3) are compliant with an identical function defined by the shape of the groove (16), however, there being a phase shift of approx. 15 DEG between the mutual positions of the pistons (3). This arrangement achieves a smooth braking effect, because there is a continuous flow at the throttling point (5) even at the moments of direction reversal in the movement of the pistons (3).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI885182A FI885182A7 (en) | 1988-11-11 | 1988-11-11 | DECREASING ARRANGEMENT. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9110146D0 GB9110146D0 (en) | 1991-07-03 |
| GB2248596A true GB2248596A (en) | 1992-04-15 |
Family
ID=8527340
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9110146A Withdrawn GB2248596A (en) | 1988-11-11 | 1991-05-10 | Decelerator apparatus |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPH04505108A (en) |
| AU (1) | AU4498589A (en) |
| DE (1) | DE3991291T (en) |
| FI (1) | FI885182A7 (en) |
| GB (1) | GB2248596A (en) |
| WO (1) | WO1990004999A1 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4173332A (en) * | 1976-11-03 | 1979-11-06 | Dulondel Jacques | Rotary speed limiter device |
| US4452430A (en) * | 1981-03-03 | 1984-06-05 | Kankkunen Matti K | Safety device for lowering persons and loads |
-
1988
- 1988-11-11 FI FI885182A patent/FI885182A7/en not_active Application Discontinuation
-
1989
- 1989-11-13 JP JP1511366A patent/JPH04505108A/en active Pending
- 1989-11-13 AU AU44985/89A patent/AU4498589A/en not_active Abandoned
- 1989-11-13 WO PCT/FI1989/000208 patent/WO1990004999A1/en not_active Ceased
- 1989-11-13 DE DE19893991291 patent/DE3991291T/de not_active Withdrawn
-
1991
- 1991-05-10 GB GB9110146A patent/GB2248596A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4173332A (en) * | 1976-11-03 | 1979-11-06 | Dulondel Jacques | Rotary speed limiter device |
| US4452430A (en) * | 1981-03-03 | 1984-06-05 | Kankkunen Matti K | Safety device for lowering persons and loads |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04505108A (en) | 1992-09-10 |
| DE3991291T (en) | 1992-01-30 |
| GB9110146D0 (en) | 1991-07-03 |
| FI885182A7 (en) | 1990-05-12 |
| AU4498589A (en) | 1990-05-28 |
| FI885182A0 (en) | 1988-11-11 |
| WO1990004999A1 (en) | 1990-05-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |