Power plants – Pressure fluid source and motor – Condition responsive control means responsive to – or...
Patent
1985-12-12
1988-10-18
Michalsky, Gerald A.
Power plants
Pressure fluid source and motor
Condition responsive control means responsive to, or...
60403, 60452, F15B 2000
Patent
active
047777974
ABSTRACT:
A hydraulic system having an axial piston pump as a control pump which is regulated by a regulating device as a function of the demands with respect to volumetric flow and pressure of a load circuit supplied by it. On the suction side, the control pump is optionally provided with a partial amount of its maximum delivery volume by a feed pump, while the remaining part of the corresponding delivery quantity is drawn in directly from a storage container, bypassing the feed pump. Possibly impermissibly high vacuums on the suction side of the control pump are detected by a suction safety device which acts on the control pump via its regulating device so that the control pump delivers smaller quantities of hydraulic fluid unitl permissible operating conditions are reached.
REFERENCES:
patent: 2674191 (1954-04-01), Ifield
patent: 2753803 (1956-07-01), Lawrence
patent: 3846982 (1974-11-01), Rometsch et al.
patent: 4037993 (1977-07-01), Roberts
patent: 4325677 (1982-04-01), Nonnenmacker
patent: 4480963 (1984-11-01), Ring
patent: 4518322 (1985-05-01), Nonnenmacker
Mannesmann Rexroth GmbH
Michalsky Gerald A.
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