Patent ID: 6176251
Filing Date: 2001-01-23
Classification: F04B,Y10T

Abstract:
A valve assembly (8), for a pressure washer (1) comprising a pump to pressurize a fluid and a gun for delivering the pressurized fluid, the valve assembly having an inlet opening (7) for pressurized fluid from the pump, an outlet opening (9) for supply of the pressurized fluid to said gun; a fluid interception element (28) interposed between the said inlet and outlet openings (7) (9) and movable by thrust of said pressurized fluid between a first operating position in which the said pressurized fluid flows towards the said outlet opening (9), and a second operating position in which the flow of the said fluid is substantially inhibited; and by-pass valve means (45) having an inlet passage (43) connected to the said inlet opening (7), a fluid discharge passage (46), closure means (48) interposed between the said inlet and discharge passages (43) (46), and movement means (54, 39, 41, 42) for moving the said closure means (48); said movement means (54, 39, 41, 42) including control means (39) operated by the said interception element (28) to move the said closure means (48) between a first position in which the said inlet and outlet passages (43) (46) are isolated from each other when the interception element (28) is in its first operating position, and a second position in which the passages (43) (46) are in communication with each other when the interception element (28) is in its second operating position, said inlet and outlet passages remaining in communication with each other when said interception element is in said second position irrespective of the pressure of the fluid in the said outlet opening (9).