Power plants – Pressure fluid source and motor – Condition responsive control of motive fluid flow
Reexamination Certificate
2007-06-26
2007-06-26
Lopez, F. Daniel (Department: 3745)
Power plants
Pressure fluid source and motor
Condition responsive control of motive fluid flow
C060S328000, C060S487000
Reexamination Certificate
active
11335897
ABSTRACT:
An improved diagnostic system for a hydrostatic apparatus such as a hydrostatic transmission or transaxle is disclosed. A fastener having a port formed therein is used to connect a hydraulic component such as a center section to a housing. A diagnostic system may be located external to the housing and connected to the hydraulic circuit at least partially through the fastener port. A relief valve may also be located in the fastener and connected to the fastener port, or in a different fastener having a separate fastener port, to permit the fluid in the hydraulic circuit to be discharged to a sump.
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patent: 2004/0144088 (2004-07-01), Uda et al.
Keller Scott W.
Langenfeld Thomas J.
Hydro-Gear Limited Partnership
Lopez F. Daniel
Neal Gerber & Eisenberg LLP
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