Heater device for motor vehicle

Details Heater device for motor vehicle Heater device for motor vehicle

1988-08-02

1989-11-28

Bennet, Henry A.

Heating systems

Heat and power plants

Vehicle

237 123A, 237 123B, B60H 102

Patent

active

048832260

ABSTRACT:
In a heater device for motor vehicles of the type in which engine cooling water is supplied from one or both of an engine and a combustion heater to a heater core for heating the passenger compartment of a motor vehicle, a directional control valve with four distinct directions is disposed in a supply conduit of a circulation circuit extending between the engine and the heater core. The directional control valve includes a valve box having four intake and discharge ports, and a rotary spool disposed in the valve box and having a radial straight hole interconnecting a diametrically opposite pair of the intake and discharge ports and an arcuate peripheral recess connecting adjacent two of the intake and discharge ports.

REFERENCES:
patent: 2256511 (1939-08-01), Amen
patent: 2637342 (1953-05-01), Shannon

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