GB2394214A - Constant velocity cable lowering device - Google Patents
Constant velocity cable lowering device Download PDFInfo
- Publication number
- GB2394214A GB2394214A GB0223943A GB0223943A GB2394214A GB 2394214 A GB2394214 A GB 2394214A GB 0223943 A GB0223943 A GB 0223943A GB 0223943 A GB0223943 A GB 0223943A GB 2394214 A GB2394214 A GB 2394214A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pistons
- constant velocity
- attached
- rail
- liquid
- 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- Withdrawn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
- 239000007788 liquid Substances 0.000 abstract 3
- 239000000463 material Substances 0.000 abstract 1
- DHKHKXVYLBGOIT-UHFFFAOYSA-N 1,1-Diethoxyethane Chemical compound CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 description 1
- 108010053481 Antifreeze Proteins Proteins 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000011354 acetal resin Substances 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000002528 anti-freeze Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Emergency Lowering Means (AREA)
Abstract
A device cable of lowering persons from tall buildings at a constant velocity, the device shown [fig 1]. Coils of strapping [13] or other suitable material with sufficient length for the drop required are wound onto drums [10] these may be firmly attached to fitments inside rooms or externally on buildings. A person wearing a harness may be attached to the rail [4] and when load is applied to the rail by fact of the persons weight lowering the coils unwind, rotation of the shaft [5] causes two pistons [9] to move apart and together continuously. The pistons are contained in cylinder barrels, which may be filled with oil or any viscous liquid, the liquid is forced from the front area of the pistons to the back and vice versa. The liquid passes through venturis in the pistons which controls speed of descent.
Description
23942 1 4
( 1 CONSTANT VELOCITY CABLE LOWERING DEVICE
The invention relates to the easy and safe exit from high buildings in the event of normal exit routes being unavailable, it may also be used to allow escape from heights where speed of escape is essential such as helicopters, oil rigs, ships and inhospitable terrain for mountain rescue.
The difficulty of escape from high buildings where escape systems may include rigid ladders, coiling metal ladders, rope, rope abseil, or rope and pulley. Most of these systems may be suitable for able bodied persons under normal conditions but in times of emergency the less able or mobile can easily be evacuated when attached to lowering device. The device may be secured within a room and the cable attached to harness worn by the person to be lowered or the device may be attached to the person and the cable firmly fixed within the room.
The object of this device is to allow a person to be lowered at a constant velocity from a height which may be beyond the reach of other available escape systems or no escape systems exist, to reach ground level.
A coil of polyester strapping is coil wound onto a drum or drums, length of I strapping may vary from 40m up to 1 50m, the drum or drums will rotate at a constant speed when a load or a person is attached to the device. The speed of rotation is controlled by two pistons moving apart from each other damped by a medium such as oil or anti freeze passing from the front of each piston to the back through a venturi [16] in each piston this process reverses as the pistons change direction.
The device will be manufactured in a combination of steel, aluminium and moulded acetal resin Figure 1 shows a part sectioned elevation of the complete device Figure 2 shows the end view with the attachment component fixed to the strapping As shown in Fig 2 the attachment component[13] is attached to the strapping [8] which is wound onto the rotating drum [10]. The drum is connected to the central shaft [5], attached either side are two sleeves [2] which have endless helical grooves one left hand and one right hand machined into them. The moving pistons[11] slide freely over the sleeves [2] and are prevented from rotating by a restraining ball and slot.
The entire assembly is encased by a barrel [1] with a fine bore finish, the end cap [14] is assembled and pinned to prevent unauthorized tampering.
A medium is injected into the chambers [9] and sealed, the drive ball assembly [6] is fitted so that the ball will travel freely in the helical grooves
2. The strapping [8] runs over a jockey pulley [15] mounted centrally on the connecting shaft [7] When the attachment component [13] is firmly attached to a fixed item within the room and load is applied to the rail [4] the drum rotates and the pistons [11] travel apart through the medium. The medium is forced through the ventures [16] in the piston to fill the space vacated by the pistons. When the pistons complete their travel outward they are driven inwards by the helical groove and the medium passes to the front of each piston. This process is continuous whilst a load is applied to the rail [4].
Claims (1)
- ( 3 CLAIMS1. A safety lowering device which when firmly attached within a room will allow a person who is attached to the strap or straps to descend safely and easily to ground level
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0223943A GB2394214A (en) | 2002-10-15 | 2002-10-15 | Constant velocity cable lowering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0223943A GB2394214A (en) | 2002-10-15 | 2002-10-15 | Constant velocity cable lowering device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB0223943D0 GB0223943D0 (en) | 2002-11-20 |
| GB2394214A true GB2394214A (en) | 2004-04-21 |
Family
ID=9945926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0223943A Withdrawn GB2394214A (en) | 2002-10-15 | 2002-10-15 | Constant velocity cable lowering device |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2394214A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3861496A (en) * | 1973-12-10 | 1975-01-21 | Leon J Hoover | Fire escape device |
| US3907256A (en) * | 1974-04-03 | 1975-09-23 | Kauko Valdemar Kankkunen | Device for lowering persons and loads |
| GB1408477A (en) * | 1973-11-01 | 1975-10-01 | Johnson Enterprise Co Ltd | Apparatus for escaping from high buildings |
| US4301892A (en) * | 1975-08-11 | 1981-11-24 | Arce Carlos L | Device for the ascension and descension of high altitudes |
| US4416351A (en) * | 1980-04-29 | 1983-11-22 | Machinefabriek Geurtsen Deventer B.V. | Reel for a life-line |
| US4463830A (en) * | 1982-02-16 | 1984-08-07 | Machinefabriek Geurtsen Deventer B.V. | Reel for a life-line |
| GB2168668A (en) * | 1984-12-21 | 1986-06-25 | Sheu Por Jiy | Fire-escape apparatus for high building |
| EP0252196A1 (en) * | 1986-07-10 | 1988-01-13 | Fausto Ciancaleoni | Emergency descent apparatus |
| DE3924218A1 (en) * | 1989-07-21 | 1991-01-24 | Alfred Dipl Phys Seeger | Cable lowering appts. for e.g. loads - has automatic braking system with piston cylinder units on both sides of the roller |
| DE20111272U1 (en) * | 2001-07-06 | 2002-01-17 | Schickor, Michael, Dipl.-Ing. (FH), 85250 Altomünster | Descender with constant descent speed |
-
2002
- 2002-10-15 GB GB0223943A patent/GB2394214A/en not_active Withdrawn
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1408477A (en) * | 1973-11-01 | 1975-10-01 | Johnson Enterprise Co Ltd | Apparatus for escaping from high buildings |
| US3861496A (en) * | 1973-12-10 | 1975-01-21 | Leon J Hoover | Fire escape device |
| US3907256A (en) * | 1974-04-03 | 1975-09-23 | Kauko Valdemar Kankkunen | Device for lowering persons and loads |
| US4301892A (en) * | 1975-08-11 | 1981-11-24 | Arce Carlos L | Device for the ascension and descension of high altitudes |
| US4416351A (en) * | 1980-04-29 | 1983-11-22 | Machinefabriek Geurtsen Deventer B.V. | Reel for a life-line |
| US4463830A (en) * | 1982-02-16 | 1984-08-07 | Machinefabriek Geurtsen Deventer B.V. | Reel for a life-line |
| GB2168668A (en) * | 1984-12-21 | 1986-06-25 | Sheu Por Jiy | Fire-escape apparatus for high building |
| EP0252196A1 (en) * | 1986-07-10 | 1988-01-13 | Fausto Ciancaleoni | Emergency descent apparatus |
| DE3924218A1 (en) * | 1989-07-21 | 1991-01-24 | Alfred Dipl Phys Seeger | Cable lowering appts. for e.g. loads - has automatic braking system with piston cylinder units on both sides of the roller |
| DE20111272U1 (en) * | 2001-07-06 | 2002-01-17 | Schickor, Michael, Dipl.-Ing. (FH), 85250 Altomünster | Descender with constant descent speed |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0223943D0 (en) | 2002-11-20 |
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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) |