Auxiliary power system on a vehicle

Claim 2

A hydraulic system for use on a vehicle comprising a main source of pressurized Fluid adapted for being driven by the vehicle engine, an auxiliary source of pressurized fluid, valve means connected between said main source of pressurized fluid and said auxiliary source of pressurized fluid for transmitting pressurized fluid from the source of highest pressure through said system, an electrical circuit including a source of electrical energy, an electric motor driving said auxiliary source of pressurized fluid, an automatically operated switch means including, means connected to said engine normally biasing said automatically operated switch means to an open position when said engine is operating, a manually operated switch means including a brake switch connected in series with said automatically operated switch means, starting means for starting said electric motor to operate said auxiliary source of pressurized fluid when said switch means are closed to thereby provide an auxiliary source of pressurized fluid for maintaining operation of said hydraulic system.

Claim 3

A hydraulic system for use on a vehicle as set forth in claim 1 wherein said automatically operated switch means includes, a current generating means driven by said engine, a normally open switch connected to said current generating means having means to maintain said switch open in response to operation of said current generating means and thereby close said automatically operated switch means when said current generating means is stalled.

Claim 4

A hydraulic system for use on a vehicle as set forth in claim 1 wherein said hydraulic system includes a reservoir means for supplying low pressure hydraulic fluid, means defining a main compartment for supplying fluid to said main source of pressurized fluid and means defining an auxiliary compartment for supplying fluid to said auxiliary source of pressurized fluid.

Claim 5

A hydraulic system for use on a vehicle as set forth in claim 1 wherein said hydraulic system includes a hydraulically operated steering mechanism for steering said vehicle.

Claim 6

A hydraulic system for use on a vehicle as set forth in claim 1 including a hydraulic brake actuating means for operating the vehicle brakes.

Claim 7

A hydraulic system for use on a vehicle as set forth in claim 1 wherein said automatically operated switch means includes an engine driven current generating means connected to a solenoid to open said automatically operated switch means when said current generating means is in operation.

Claim 8

A hydraulic system for use on a vehicle as set forth in claim 1 wherein said hydraulic system includes a hydraulic steering mechanism for steering said vehicle, a hydraulic brake mechanism for braking said vehicle and means for connecting said brake and said steering mechanism for operation in said hydraulic system.

Claim 9

A hydraulic system for use on a vehicle as set forth in claim 1 including hydraulic means for operating the vehicle brakes, hydraulic clutch control means adapted for operating the vehicle clutch in said hydraulic system.

Claim 10

A hydraulic system for use on a vehicle as set forth in claim 1 wherein said manually operated switch means includes a key switch in said electrical system connected in series with said brake switch and said automatic switch means to control operation of said motor, said motor thereby driving said auxiliary pump in response to operation of said brake switch and closing of said automatic switch means.

Claim 11

A hydraulic system for use on a vehicle as set forth in claim 1 wherein said automatically operated switch means includes a current generator driven by said engine, a solenoid switch having a solenoid connected to said generator for normally biasing said automatically operated switch means to an open position when said generator is operating.

Claim 12

A hydraulic system for use on a vehicle as set forth in claim 1 wherein said automatically operated switch means includes a solenoid, a current generator driven by said engine, means connecting said solenoid to said current generator for normally maintaining said automatIcally operated switch means in an open position, said automatically operated switch means including mechanical means for closing said automatically operated switch means for energizing said auxiliary motor when said generator is stalled.

Claim 13

A hydraulic system for use on a vehicle as set forth in claim 1 including a reservoir comprising means defining a main compartment and an auxiliary compartment, filter means in said auxiliary connected between said main compartment and said auxiliary compartment to thereby provide filtering of hydraulic fluid flow between compartments when said hydraulic system is in operation.

Claim 14

A hydraulic system for use on a vehicle as set forth in claim 1 wherein said automatically operated switch means includes a vacuum switch adapted for operation by vacuum in the engine to thereby energize said starting means when no vacuum is present.

Claim 15

A hydraulic system for use on a vehicle as set forth in claim 1 wherein said automatically operated switch includes a current generator driven by said engine, electrical means connected to said generator to normally deenergize said starting means when said generator is running and energize said starting means when said generator is stalled.

Claim 16

A hydraulic system for use on a vehicle comprising, a main source of pressurized fluid adapted for being driven by the vehicle engine, an auxiliary, source of pressurized fluid, valve means between said main source of pressurized fluid and said auxiliary source of pressurized fluid for transmitting pressurized fluid from the source of highest pressure through said system, an electrical circuit including a source of electrical energy, an electric motor driving said auxiliary source of pressurized fluid, a current generating means driven by said engine, a normally open switch means connected to said current generating means, electrical means biasing said switch means to an open position when said current generating means is operating, a brake switch connected in series with said switch means, starting means for starting said electric motor connected in series with said brake switch and said switch means to operate said auxiliary source of pressurized fluid when said switch means is closed responsive to said current generating means not operating and said brake switch is closed responsive to operation of a vehicle brake to thereby provide an auxiliary source of pressurized fluid for maintaining operation of said hydraulic system.

Claim 17

A hydraulic system for use on a vehicle comprising, a main source of pressurized fluid adapted for being driven by the vehicle engine, an auxiliary, source of pressurized fluid, valve means between said main source of pressurized fluid and said auxiliary source of pressurized fluid for transmitting pressurized fluid from the source of highest pressure through said system, an electrical circuit including a source of electrical energy, an electric motor driving said auxiliary source of pressurized fluid, a current generating means driven by said engine, a normally open switch means connected to said current generating means, electrical means biasing said switch means to an open position when said current generating means is operating, a brake switch connected in series with said switch means, starting means for starting said electric motor connected in series with said brake switch and said switch means to operate said auxiliary source of pressurized fluid when said switch means is closed responsive to said current generating means not operating and said brake switch is closed responsive to operation of a vehicle brake to thereby provide an auxiliary source of pressurized fluid for maintaining operation of said hydraulic system.