Motor vehicles – Surface effect vehicles – Dynamic seal or fluid curtain
Patent
1993-03-29
1994-01-11
Focarino, Margaret A.
Motor vehicles
Surface effect vehicles
Dynamic seal or fluid curtain
180141, 280445, B62D 508
Patent
active
052772659
ABSTRACT:
A bypass and switch arrangement is connected to the conventional steering system on a towable vehicle. A rotary bypass valve includes two ports connected between the two hydraulic lines leading from the steering control valve to the steering cylinder or motor. The bypass valve has a normal operating position which blocks flow between the lines so that normal steering operation is provided. When the vehicle is connected for towing, the bypass valve is rotated to an open towing position to permit free flow of fluid between the ports and lines so that fluid may move freely to and from the steering motor or cylinder. If a steering cylinder is used, a third port on the valve is connected to the oil cooler on the vehicle and opens the lines to reservoir through the cooler to accommodate the deficient or excess flow from or to the cylinder which results from the difference in effective area on opposite sides of the ram. A switch connected between the switched power supply and an electric shut-off valve on the vehicle engine injector pump is responsive to movement of the valve for disabling the engine when the valve is in the towing position. Before the engine can be restarted after towing, the valve must first be moved back to the operating position wherein normal steering and pump operation is enabled.
REFERENCES:
patent: 2930631 (1960-03-01), Voorhess, Sr.
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patent: 4557342 (1985-12-01), Drutchas
patent: 4655667 (1987-04-01), Plumb et al.
patent: 4779418 (1988-10-01), Artzberger
John Deere Brochure "Convenient Crop Care", p. 6.
Melroe Spra-Coupe Model 230 Operator's Manual, pp. 1, 2, 7 and 37 dated Apr. 1989 (Rev. Dec. 1989).
Deere & Company
Focarino Margaret A.
Mattix Carla
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