High-pressure cleaner with encapsulated motor-pump assembly

Details High-pressure cleaner with encapsulated motor-pump assembly High-pressure cleaner with encapsulated motor-pump assembly

1992-04-08

1993-06-22

Bertsch, Richard A.

Pumps

Motor driven

Electric or magnetic motor

417410R, F04B 1700, F04B 3504

Patent

active

052211932

ABSTRACT:
In a high-pressure cleaner, in which the motor and possibly at least parts of the pump are enclosed in a watertight housing (8), an outwardly opening non-return valve is provided in the wall of the housing. The valve is preferably formed by a number of holes (17) in the wall of the housing, these holes being covered by a taut rubber strap (18). With this arrangement, excess pressures caused by combustible substances in the housing being ignited, such as by commuter sparks or a hot part of the motor, are released, thus avoiding damage to the housing.

REFERENCES:
patent: 4627798 (1986-12-01), Thomas
patent: 4834626 (1989-05-01), Prevosto
patent: 4946451 (1990-08-01), Cianci
patent: 5053633 (1991-10-01), Sugiyama et al.
patent: 5111681 (1992-05-01), Yasui et al.

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