Hydraulic valve system for controlling particularly a vehicle gearbox
AssigneeS.R.M. Hydromekanik Aktiebolag
InventorsKarl G. Ahlen, Rainer B. Ketola
Life of this patent
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Abstract
A hydraulic valve system for controlling operation of a motor vehicle gear box comprising a plurality of multi way valves of the disc-type in which the first multi way valve conveys pressure fluid to either one of two consumers and drains the consumer to which fluid is not conveyed, one of the two consumers comprising a valve system having two or three of the said multi way valves, each of which is operable to supply pressure fluid to one or other of two further consumers, and means to interlock the said two or three multi way valves so as to permit connection to only one of four or six consumers at any one time.
Claims23
A hydraulic valve system comprising a plurality of multiway valves of the disc type having an elongated axially movable member with discs mounted thereon such that axial movement of the elongated member causes at least one disc to move axially off of its seat to permit the flow of fluid therepast,
- a first said multi-way valve of the disc type having a pressure connection connected to a source of pressurized fluid and two consumer connections, each alternately connectable to the pressurized fluid connection, and a pair of drain connections, each alternately connectable to a consumer connection not then connected to the pressure connection,
- one of said consumer connections being further connected to the pressure connection of an interlocked valve system which comprises at least a second and a third multi-way valve of the said disc type, each of the second and third multi-way valves having means for connecting their respective pressure connections to at least one other consumer connection thereof,
- and including interlocking means for interlocking said second and third multi-way valves so that only one of those valves can have a consumer connection connected to a pressure connection at any one time.
Dependencies are inferred from the claim text.