US3918548A - Gas cushion vehicles - Google Patents

Gas cushion vehicles Download PDF

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Publication number
US3918548A
US3918548A US427537A US42753773A US3918548A US 3918548 A US3918548 A US 3918548A US 427537 A US427537 A US 427537A US 42753773 A US42753773 A US 42753773A US 3918548 A US3918548 A US 3918548A
Authority
US
United States
Prior art keywords
duct
cushion
outlet
gas
membrane
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 - Lifetime
Application number
US427537A
Other languages
English (en)
Inventor
Raymond William Dyke
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.)
Vosper Thornycroft UK Ltd
Original Assignee
Vosper Thornycroft UK 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 Vosper Thornycroft UK Ltd filed Critical Vosper Thornycroft UK Ltd
Application granted granted Critical
Publication of US3918548A publication Critical patent/US3918548A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60V—AIR-CUSHION VEHICLES
    • B60V1/00—Air-cushion
    • B60V1/16—Flexible skirts

Definitions

  • a gas cushion vehicle provided with one or more lift fan duct sealing valves for maintaining gas cushion pressure in the event of lift fan stoppage wherein a sealing valve comprises a flexible valve membrane arranged across the cushion end of the or each gas duct leading from the or each lift fan to the cushion, the
  • membrane being flexibly movable into an open position clear of the end of the duct when the lift fan is operating and movable into a closed position so as to close the end of the or each duct when the or each lift fan associated with the or each duct is not operating and the gas pressure acting within the cushion is higher than the gas pressure acting within the or each duct.
  • the present invention relates to a gas cushion vehicle and more particularly to a non-return valve in a gas cushion vehicle arranged so as to prevent gas contained within the cushion from escaping by reverse flow through the lift fans in the event of a lift fan stoppage.
  • the gas is pressurised by one or more lift fans and supplied through a duct or ducts to the or each cushion. If the lift fan or one of the lift fans fails it is desirable to prevent the loss of gas from said cushion or cushions by reverse flow through the inoperative lift fan.
  • An object of the present invention is therefore to attempt to overcome these disadvantages.
  • the present invention consists of a gas cushion vehicle having a hull provided with one or more lift fans and a duct from the or each fan to the gas cushion, a noninvertible flexible valve membrane arranged across the cushion end of the or each duct, the membrane being flexibly movable into an open position clear of the end of the duct when the lift fan is operating and movable into a closed position so as to close the end of the or each duct when the or each lift fan associated with the or each duct is not operating and the gas pressure acting within the cushion is higher than the gas pressure acting within the or each duct, whereby on lift fan stoppage the duct is sealed.
  • the arrangement is such that only one flexible membrane need be provided for each duct or group of ducts; the membrane being non-invertible there is less wear; and because the space required for the membrane to operate is minimal, the membrane also can be fitted in a vehicle having a flexible skirt within the existing space between the end of the duct and the skirt and within the upper part of the flexible skirt. Because the membrane is clear of the end of the duct the flow in the duct is uninterrupted, and the duct resistance kept minimal.
  • FIG- URE shows a diagrammatic cross-section of a cushion supply duct and flexible skirt with valve membrane in a gas cushion craft according to the invention.
  • the skirt 2 has an upper part 3 formed of an outer loop 4 and inner loop 5.
  • the skirt 2 has a lower part 6 formed from a main segment 7 and inner segment 8.
  • a lift fan duct 9 having an end 10 which opens into a longitudinal space 11 formed within the upper part 3 of the skirt.
  • a flexible membrane 12 attached to the outer loop 4 at 13 and to the hull at 14.
  • a gas cushion vehicle having a hull provided with lift fan means, duct means leading from the fan means to the gas cushion and having an outlet, a flexible valve membrane having a pair of substantially parallel edges which are attached to the hull on opposite sides of said outlet so that the membrane extends across said outlet, whereby the membrane is flexibly movable into an open position clear of said outlet when the lift fan means is operating and is movable into a closed position so as to close said outlet when the lift fan means is not operating and the gas pressure acting within the cushion is higher than the gas pressure acting within the duct means, and a flexible skirt attached to said hull, with one of said edges of the valve membrane attached to said flexible skirt.
  • a gas cushion vehicle as claimed in claim 1, wherein said flexible skirt comprises an outer loop and an inner loop, said one of said valve membrane edges being attached to said outer loop of the flexible skirt.
  • a gas cushion vehicle having a hull provided with lift fan means, duct means leading from the fan means to the gas cushion and having an outlet, and a flexible valve membrane having a pair of substantially parallel edges which are attached to the hull on opposite sides of said outlet so that the membrane extends across said outlet, whereby the membrane is flexibly movable into an open position clear of said outlet when the lift fan means is operating and is movable into a closed position so as to close said outlet when the lift fan means is not operating and the gas pressure acting within the cushion is higher than the gas pressure acting within the duct means, one of the edges of said valve membrane being attached directly to said hull.

Landscapes

  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Check Valves (AREA)
  • Superstructure Of Vehicle (AREA)
US427537A 1973-05-07 1973-12-26 Gas cushion vehicles Expired - Lifetime US3918548A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2164273A GB1366234A (en) 1973-05-07 1973-05-07 Gas cushion vehicles

Publications (1)

Publication Number Publication Date
US3918548A true US3918548A (en) 1975-11-11

Family

ID=10166369

Family Applications (1)

Application Number Title Priority Date Filing Date
US427537A Expired - Lifetime US3918548A (en) 1973-05-07 1973-12-26 Gas cushion vehicles

Country Status (6)

Country Link
US (1) US3918548A (enrdf_load_stackoverflow)
JP (1) JPS50511A (enrdf_load_stackoverflow)
AU (1) AU6426474A (enrdf_load_stackoverflow)
FR (1) FR2228649B3 (enrdf_load_stackoverflow)
GB (1) GB1366234A (enrdf_load_stackoverflow)
SE (1) SE405581B (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4131175A (en) * 1975-06-20 1978-12-26 British Hovercraft Corporation Ltd. Air cushion vehicles
US4848501A (en) * 1987-05-07 1989-07-18 Matthew Goodwin Air cushion vehicle
US5370197A (en) * 1992-09-09 1994-12-06 Goodwin Hovercraft Company, Inc. Air cushion vehicle

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5816931Y2 (ja) * 1981-03-09 1983-04-05 ブリテイツシユ・ホ−バ−クラフト・コ−ポレ−シヨン・リミテツド 空気クツシヨン乗物
JP2505908Y2 (ja) * 1989-11-17 1996-08-07 川崎重工業株式会社 エアクッション型乗物のスカ―トの構造

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1051738A (en) * 1912-01-29 1913-01-28 Garrett Kavanagh Pneumatic tire.
US3099288A (en) * 1960-04-11 1963-07-30 Union Tank Car Co Nonclogging check valve
US3425505A (en) * 1965-05-03 1969-02-04 Westland Aircraft Ltd Cushion air reverse flow preventing means
US3481423A (en) * 1966-10-25 1969-12-02 Cushioncraft Ltd Means to trim air cushion vehicles
US3552519A (en) * 1967-09-04 1971-01-05 Curtis Dyna Prod Corp Air-cushion vehicles
US3601214A (en) * 1968-03-22 1971-08-24 Bertin & Cie Devices for supplying fluid under pressure to ground effect machines
US3618695A (en) * 1968-10-25 1971-11-09 British Hovercraft Corp Ltd Flexible skirt assemblies for air cushion vehicles
US3643758A (en) * 1969-09-15 1972-02-22 British Houercraft Corp Ltd Skirts for air cushion vehicles

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1300751A (en) * 1918-05-10 1919-04-15 John Franklin Macindoe Lubricator.

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1051738A (en) * 1912-01-29 1913-01-28 Garrett Kavanagh Pneumatic tire.
US3099288A (en) * 1960-04-11 1963-07-30 Union Tank Car Co Nonclogging check valve
US3425505A (en) * 1965-05-03 1969-02-04 Westland Aircraft Ltd Cushion air reverse flow preventing means
US3481423A (en) * 1966-10-25 1969-12-02 Cushioncraft Ltd Means to trim air cushion vehicles
US3552519A (en) * 1967-09-04 1971-01-05 Curtis Dyna Prod Corp Air-cushion vehicles
US3601214A (en) * 1968-03-22 1971-08-24 Bertin & Cie Devices for supplying fluid under pressure to ground effect machines
US3618695A (en) * 1968-10-25 1971-11-09 British Hovercraft Corp Ltd Flexible skirt assemblies for air cushion vehicles
US3643758A (en) * 1969-09-15 1972-02-22 British Houercraft Corp Ltd Skirts for air cushion vehicles

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4131175A (en) * 1975-06-20 1978-12-26 British Hovercraft Corporation Ltd. Air cushion vehicles
US4848501A (en) * 1987-05-07 1989-07-18 Matthew Goodwin Air cushion vehicle
US5370197A (en) * 1992-09-09 1994-12-06 Goodwin Hovercraft Company, Inc. Air cushion vehicle

Also Published As

Publication number Publication date
FR2228649B3 (enrdf_load_stackoverflow) 1976-11-05
AU6426474A (en) 1975-07-10
JPS50511A (enrdf_load_stackoverflow) 1975-01-07
GB1366234A (en) 1974-09-11
SE405581B (sv) 1978-12-18
FR2228649A1 (enrdf_load_stackoverflow) 1974-12-06

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