Title: Hydraulic drive

Abstract: A hydraulic drive according to the invention comprises a gas hydraulic accumulator and a chamber whose volume is equal to at least the consumption of fluid by a User, e.g. a hydraulic cylinder of a press. This chamber is divided by a piston into two spaces. One of these communicates with the accumulator through a pipeline which is connected to a pump. The other space of the chamber communicates with the pump through a nonreturn valve, and with the User, through a closing device. This layout of the hydraulic drive steps up its reliability and ensures the possibility of controlling the pressure in the gas-hydraulic accumulator.

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Inventors: Grigorenko, Anatoly S.
Moroz, Jury A.
Kuznetsov, German N.
Vimba, Vladimir I. (ulitsa 50 let VLK, SM)
Landyshev, Vladimir V. (ulitsa 50 let VLK, SM)
Bocharov, Jury A.
Safonov, Anatoly V.

Application Number: 906621
Filing Date: 1978-05-16
Publication_date: 1980-05-13
Assignee:
Primary Class(es): 60/413 91/5
Other Classes:
US Patent Ref:

706688	Aug, 1902	Reynders et al.	91/4.
3100965	Aug, 1963	Blackburn	60/413.
3564842	Feb, 1971	Van Marle	60/593.

Other Refs: 161632

Mar, 1964	SU

Primary Examiner: Geoghegan, Edgar W.
Assistant Examiner:
Attorney: Fleit & Jacobson