Fastener and valve for a hydraulic apparatus

Details Fastener and valve for a hydraulic apparatus Fastener and valve for a hydraulic apparatus

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.

REFERENCES:
patent: 3591965 (1971-07-01), Bobst et al.
patent: 5314387 (1994-05-01), Hauser et al.
patent: 6079206 (2000-06-01), Petrzik et al.
patent: 6185936 (2001-02-01), Hauser et al.
patent: 6237331 (2001-05-01), Sorensen
patent: 6272854 (2001-08-01), Ishii et al.
patent: 2004/0144088 (2004-07-01), Uda et al.

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