DEVICE FOR ACTUATING A HYDROSTATIC DRIVE DEVICE FOR ACTUATING A HYDROSTATIC DRIVE

WIPO Patent Application WO1996023980

A3

PCT No. PCT/AT96/00015 Sec. 371 Date Aug. 1, 1997 Sec. 102(e) Date Aug. 1, 1997 PCT Filed Jan. 31, 1996 PCT Pub. No. WO96/23980 PCT Pub. Date Aug. 8, 1996A device for the operation of a hydrostatic drive (1) having a periodically operable switch valve (2) which connects a resonant pipe (4) connected with the hydrostatic drive (1) for the formation of standing pressure waves in the hydraulic fluid under resonant conditions alternately to a pressure-fluid supply line (5) and to a return line (6). In order to create advantageous control condition, the resonant pipe (4) has a pressure outlet (7) in an oscillation node in the standing pressure waves, and that the switch times of the switch valve (2) be controllable with constant switch frequency.

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SCHEIDL RUDOLF (AT)
LEITNER WERNER (AT)
RIHA GERALD (AT)
SCHINDLER DIETMAR (AT)

PCT/AT1996/000015

September 26, 1996

January 31, 1996

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REXROTH MANNESMANN GMBH (DE)
SCHEIDL RUDOLF (DE)
LEITNER WERNER (DE)
RIHA GERALD (DE)
SCHINDLER DIETMAR (DE)

B06B1/20; F15B21/04; F15B21/12; (IPC1-7): F15B21/04

US3835810A	1974-09-17
EP0006833A2	1980-01-09
BE661144A	1965-07-01
DE3314392A1	1984-10-25
DE2931797A1	1981-02-19

"le generateur hydraulique d'impulsions au service du formage des metaux.", ENERGIE FLUIDE, vol. 14, no. 83, December 1975 (1975-12-01), PARIS FR, pages 28 - 32, XP002008512

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