Pumps – Condition responsive control of drive transmission or pump... – Adjustable cam or linkage
Patent
1998-02-27
2000-03-07
Moulis, Thomas N.
Pumps
Condition responsive control of drive transmission or pump...
Adjustable cam or linkage
417 53, F04B 126
Patent
active
060331887
ABSTRACT:
A pump system includes a variable fluid displacement pump having a pressure line which is connected to a pressure load and connected to a load sensing control. A variable orifice is located downstream from the load sensing control. The variable orifice is fluidly connected to the load sensing control in a servo pressure conduit such that the margin pressure varies proportionally with respect to the fluid displacement Of the pump. The variable orifice can take many different forms, including a variable cross sectional area gap between the housing and an elongated servo piston longitudinally slidable therein. A longitudinal slot having uniformly increasing depth along the length of the servo piston gives the servo piston a cross sectional area which varies along its length. Thus, a variable orifice results.
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Baldus Jeffrey A.
Dirks David D.
Geringer Kerry G.
Gimie Mahmoud M.
Moulis Thomas N.
Sauer Inc.
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