Constant supply of vacuum or pressure for vacuum or pressure ope

Details Constant supply of vacuum or pressure for vacuum or pressure ope Constant supply of vacuum or pressure for vacuum or pressure ope

1974-10-21

1976-04-06

Goodman, Philip

Motor vehicles

Including one or more ski-like or runner members

With at least one surface-engaging propulsion element

60410, B60K 2600

Patent

active

039483436

ABSTRACT:
A vacuum or pressure unit to be incorporated in a vacuum or pressure system of a vehicle which operates, or assists in the operation of, at least one vehicle component, the vacuum or pressure unit comprising a pump in fluid communication with the vacuum or pressure system of the vehicle, an electric motor operatively connected to the pump to drive the pump and connected to a source of electrical energy via a pressure responsive electric switch mounted in the vacuum or pressure system of the vehicle, the pressure responsive electric switch being intended to close the electrical circuit between the electric motor and the electrical energy source to activate the electric motor upon the magnitude of the pressure in the vacuum or pressure system being insufficient to operate or assist in the operation of the vehicle components at the desired efficiency.

REFERENCES:
patent: 2482732 (1949-09-01), Hollerith
patent: 2781870 (1957-02-01), Clements
patent: 2940561 (1960-06-01), Atkin
patent: 3139728 (1964-07-01), Lang
patent: 3528522 (1970-09-01), Turke
patent: 3572032 (1971-03-01), Terry
patent: 3582150 (1971-06-01), Williams
patent: 3669210 (1972-06-01), Haefner

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