Title:
ADJUSTING DEVICE FOR LEVEL OF OBJECT PLACING TABLE
Document Type and Number:
Japanese Patent JPH01176800
Kind Code:
A
Abstract:
PURPOSE:To provide possibility of maintaining the set level stably by furnishing a hydraulic adjusting solenoid valve, which limits the oil pressure stress to a check valve, on the side nearer the hydraulic cylinder than a main passage and a divergent point with one or the other. CONSTITUTION:On a main passage 8 a hydraulic adjusting solenoid valve 14, which limits the oil pressure stress to a check valve 9, on the side nearer a hydraulic cylinder 5 than the divergent point B at which one of the paths equipped with the mentioned check valve 9 and a supply pump 10 is connected with the other path equipped with a solenoid valve for collection 11. As a result, an oil pressure stress limited by the hydraulic adjusting valve 14 is added to the check valve 9, which is closed except when oil is supplied to the cylinder inside 5a of the hydraulic cylinder 5, so that possible oil leak can be hindered by the check valve 9. Accordingly eventual variation due to oil leak at the check valve 9 is not transmitted from the hydraulic cylinder 5, and thus the mounted sleeping table can be maintained stably at the specified level.
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Inventors:
FUJITA HIDEHIRO
Application Number:
JP39988A
Publication Date:
July 13, 1989
Filing Date:
January 06, 1988
Export Citation:
Assignee:
TOSHIBA CORP
International Classes:
A61B6/03; A61B6/04; B66F17/00; B66F7/08; (IPC1-7): A61B6/03; A61B6/04; B66F7/08; B66F17/00
Domestic Patent References:
| JPS59158797A | 1984-09-08 |
Attorney, Agent or Firm:
Yasuo Miyoshi (1 outside)