Fluid handling – Systems – Multi-way valve unit
Reexamination Certificate
2006-12-22
2010-06-15
Rivell, John (Department: 3753)
Fluid handling
Systems
Multi-way valve unit
C137S625600, C137S625640, C251S031000
Reexamination Certificate
active
07735517
ABSTRACT:
A valve for controlling fluid flow in a fluid system is disclosed. The valve includes a housing, a servo spool, and a piston. The servo spool defines a spiral groove and a spiral land. The piston defines an orifice configured to provide flow communication to a supply of pressurized fluid and an orifice configured to provide flow communication to a portion of the fluid system exterior to the valve. The valve further includes a main spool operably coupled to the piston. The main spool is configured to control flow of fluid in the fluid system. The spiral groove and spiral land are configured such that angular displacement of the servo spool results in a force imbalance on the piston, thereby moving the piston and the main spool in one of a first direction and a second direction.
REFERENCES:
patent: 123174 (1872-01-01), Hopkins
patent: 3106224 (1963-10-01), Moss et al.
patent: 3548876 (1970-12-01), Blok et al.
patent: 3665807 (1972-05-01), Bartholomaus et al.
patent: 4245547 (1981-01-01), Reynolds
patent: 4262969 (1981-04-01), Chatterjea
patent: 4545409 (1985-10-01), Luhmer
patent: 4674539 (1987-06-01), Sloate
patent: 4683915 (1987-08-01), Sloate
patent: 4766926 (1988-08-01), Smith
patent: 4779648 (1988-10-01), Sloate
patent: 4803415 (1989-02-01), Sepesy
patent: 4887632 (1989-12-01), Tanaka et al.
patent: 0 088 017 (1983-09-01), None
patent: 63 001802 (1988-01-01), None
patent: 05 017970 (1993-01-01), None
patent: 06241207 (1994-08-01), None
patent: 2003278703 (2003-10-01), None
English-language Abstract of JP 06241207 A.
English-language Abstract of JP 2003278703 A.
Kerckhove Philippe Georges Vande
Ma Pengfei
Caterpillar Inc
Finnegan Henderson Farabow Garrett & Dunner
Rivell John
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