Motor vehicles – Including one or more ski-like or runner members – With at least one surface-engaging propulsion element
Patent
1991-11-20
1993-10-19
Focarino, Margaret A.
Motor vehicles
Including one or more ski-like or runner members
With at least one surface-engaging propulsion element
180141, 180148, 91375A, 91449, 13762523, B62D 5083, B62D 602
Patent
active
052537293
ABSTRACT:
A steering system rotary valve having relatively rotatable spool and sleeve members and including first and second valve groups for controlling the amount of fluid feed to a power cylinder responsive to spool/sleeve rotation and including third and fourth valve groups for controlling feed pressure of fluid discharged from a pump, is provided with blocks arranged between the first and second valve groups and between the third and fourth valve groups to interrupt communication between these groups and also is provided with a variable throttle valve on the downstream side of the third and fourth valve groups so that pressure acting on all the valve groups is substantially equalized to provide uniform pressure on the entire circumference of the spool and the sleeve thereby preventing these members from becoming pressure deformed during the course of rotary valve operation.
REFERENCES:
patent: 4862985 (1989-09-01), Uchida et al.
patent: 4958695 (1990-09-01), Uchida et al.
patent: 5048630 (1991-09-01), Schaffer
patent: 5092418 (1992-03-01), Suzuki
patent: 5107752 (1982-04-01), Elser
Boehler Anne Marie
Focarino Margaret A.
Kayaba Kogyo Kabushiki Kaisha
Morrison Thomas R.
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