Title:
調整可能な荷重物体の支持装置
Document Type and Number:
Japanese Patent JP3566290
Kind Code:
B2
Abstract:
PCT No. PCT/GB94/00557 Sec. 371 Date Oct. 17, 1995 Sec. 102(e) Date Oct. 17, 1995 PCT Filed Mar. 18, 1994 PCT Pub. No. WO94/21209 PCT Pub. Date Sep. 29, 1994A rest portion is used to support a load at an adjustable height relative to a base which is connected to the rest portion by a pivotal linkage. A hydraulic ram coupled to a gas spring cylinder applies a spring force between the linkage and the base, the geometry of the linkage and ram being such that the upward component of spring force is invariant with respect to height adjustment. A control valve allows the ram to be locked at a selected height and the spring force provided by the gas spring is adjustable by movement of a second piston within the gas spring cylinder to vary the available volume of gas. A hydraulic pump is used to supply hydraulic fluid to the cylinder for adjusting movement of the second cylinder. The apparatus is suited for use in a chair-bed enabling a patient to be supported at an adjustable height during medical treatment.
Inventors:
Hoodie, george christopher
Mark Thunders, Mark Andrew
Alexander Croris, Alexander Joseph
Mark Thunders, Mark Andrew
Alexander Croris, Alexander Joseph
Application Number:
JP52080594A
Publication Date:
September 15, 2004
Filing Date:
March 18, 1994
Export Citation:
Assignee:
Key Med (Medical and Industrial Equipment) Limited
International Classes:
F15B11/12; A61G7/00; A61G7/018; A61G13/06; A61G13/10; A61G15/02; A61G15/10; F16F9/06; F16F9/44; (IPC1-7): A61G15/10; A61G7/00; A61G13/10; F15B11/12; F16F9/06
Domestic Patent References:
| JP2052651A | ||||
| JP60226311A | ||||
| JP56143159A | ||||
| JP3157218A |
Foreign References:
| FR2598911A1 | ||||
| US3984146 | ||||
| DE1802193A |
Attorney, Agent or Firm:
Hideto Asamura
Hajime Asamura
Yukio Iwamoto
Toru Mori
Hajime Asamura
Yukio Iwamoto
Toru Mori