GB2394214A - Constant velocity cable lowering device - Google Patents

Constant velocity cable lowering device Download PDF

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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Withdrawn
Application number
GB0223943A
Other versions
GB0223943D0 (en
Inventor
David Hume Williams
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB0223943A priority Critical patent/GB2394214A/en
Publication of GB0223943D0 publication Critical patent/GB0223943D0/en
Publication of GB2394214A publication Critical patent/GB2394214A/en
Withdrawn legal-status Critical Current

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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)

  1. ( 3 CLAIMS
    1. 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
GB0223943A 2002-10-15 2002-10-15 Constant velocity cable lowering device Withdrawn GB2394214A (en)

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)

* Cited by examiner, † Cited by third party
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

Patent Citations (10)

* Cited by examiner, † Cited by third party
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)