Title:
椅子昇降用油圧装置
Document Type and Number:
Japanese Patent JP4473764
Kind Code:
B2
Abstract:
A hydraulic device for elevating/lowering a chair comprising a foot pump (3), a first check valve (5), an elevating/lowering cylinder (7) and an accumulator (6) storing part of oil when oil from the foot pump (3) is supplied through the first check valve (5). The device stores part of oil supplied from the foot pump (3) in the accumulator (6) and supplies it also to the elevating/lowering cylinder (7) so as to elevate it and keeps the elevating/lowering cylinder (7) ascending by oil stored in the accumulator (6) when oil supply from the foot pump (3) is stopped. The oil in the accumulator (6) and elevating/lowering cylinder (7) can return to the oil tank (4) through the inside of the foot pump when the first check valve (5) is opened by the foot pump (3).
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| JP2007105293 | CHAIR |
Inventors:
Toshihiko Obayashi
Miyazaki Masaya
Kaori Haruna
Miyazaki Masaya
Kaori Haruna
Application Number:
JP2005103892A
Publication Date:
June 02, 2010
Filing Date:
March 31, 2005
Export Citation:
Assignee:
Takara Belmont Co., Ltd.
International Classes:
A47C3/30; A47C1/06; A61G15/06
Domestic Patent References:
| JP2003259929A | ||||
| JP2004003654A | ||||
| JP4086444U | ||||
| JP76343C2 | ||||
| JP4052634U | ||||
| JP6012802U | ||||
| JP53106598U |
Attorney, Agent or Firm:
Kenzo Fukuda
Shinichi Fukuda
Takemichi Fukuda
Kyosuke Kato
Shinichi Fukuda
Takemichi Fukuda
Kyosuke Kato