Lowell Stingley Phones & Addresses
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12522 700 E, Clarks Hill, IN 47930 (765) 523-2022
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12522 S 700 E #S, Clarks Hill, IN 47930 (765) 523-0000
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13330 700, Clarks Hill, IN 47930 (765) 523-2187
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12300 700 E, Clarks Hill, IN 47930
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12300 S 700 E #BELLMAWR, Clarks Hill, IN 47930
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11759 Clark St, Clarks Hill, IN 47930
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Lafayette, IN
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Tippecanoe, IN
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12522 S 700 E, Clarks Hill, IN 47930
Work
Position:
Farmer
Education
Degree:
High school graduate or higher
Emails
l***y@yahoo.com
Publications
Us Patents
Switching Valve For A Hydraulic Power Steering System
View pageUS Patent:
61737283, Jan 16, 2001
Filed:
Nov 6, 1998
Appl. No.:
9/187594
Inventors:
Frederick D. Venable - Lafayette IN
Bernard C. Hudgens - West Lafayette IN
Lowell D. Stingley - Clarks Hill IN
Gary L. Vandermolen - Fort Wayne IN
Bernard C. Hudgens - West Lafayette IN
Lowell D. Stingley - Clarks Hill IN
Gary L. Vandermolen - Fort Wayne IN
Assignee:
TRW Inc. - Lyndhurst OH
International Classification:
F15B 1304
US Classification:
137112
Abstract:
A switching valve (50) for a hydraulic power steering system (10) includes a longitudinally movable valve spool (80). A spring (86) biases the spool (80) to a neutral position. The switching valve (50) is configured to direct hydraulic fluid from a primary pump (34) to a steering control valve (14) when the spool (80) is in a primary position, and to direct hydraulic fluid from an auxiliary pump (38) to the control valve (14) when the spool (80) is in an auxiliary position. The spool (80) is movable against a bias of the spring (86) from the neutral position to the primary position under the influence of a hydraulic fluid pressure differential between the opposite ends of the spool (80). The switching valve (50) defines a flow path for directing hydraulic fluid from the primary pump (34) to an end of the spool (80) when the spool (80) is in the neutral position. The flow path extends axially over a flat portion (124) of an outer surface of the spool (80).