On-off arrangement for a liquid jet hand appliance

Claim 2

A liquid jet hand appliance for personal hygiene, for receiving liquid pressure pulses from a pump unit through a flexible tube, said hand appliance comprising a. an elongated casing having an inlet passage for receiving said liquid pressure pulses and an outlet passage, b. a chamber having an outlet at one end connected with said outlet passage, an opening to the atmosphere at the other end thereof, and an inlet intermediate said outlet and opening and connected with said inlet passage, c. a bistable valve in said chamber including a sealing ring at the chamber outlet and a valve member affixed at the end of a longitudinally movable rod passing into the chamber through said opening, d. said valve member being of larger diameter than said rod and adapted for engaging said sealing ring in the closed position of the valve and disengaging from the sealing ring upon movement into said chamber to the open position of the valve, e. a manual control member attached to said rod for moving said valve member to said closed and open positions thereof, f. and a slidable sealing member slidably mounted on said rod between said valve member and said opening and engaging the encircling wall of said chamber, g. said slidable sealing member having an annular resilient lip engageable with said other end of the chamber around said opening.

Claim 3

A hand appliance according to claim 1 including guide means for said valve member positioned near said sealing ring and having an opening for flow of liquid through the chamber outlet in the disengaged position of the valve member.

Claim 4

A hand appliance according to claim 1 in which said annular resilient lip projects outward from said slidable sealing member.

Claim 5

A hand appliance according to claim 1 including stop means for establishing said closed and open positions of the valve member.

Claim 6

A hand appliance according to claim 1 in which said chamber is a generally cylindrical chamber extending longitudinally of said casinG with said outlet at the rear end thereof, said opening at the front end thereof, and said inlet at the side thereof, and in which said outlet passage extends to the front end of the appliance and said manual control member is near the front end of the appliance.

Claim 7

A hand appliance according to claim 5 in which said slidable sealing member has annular grooves in each end thereof and said resilient lip projects forwardly and inwardly from the portion of the member outside the forward annular groove therein.

Claim 8

A liquid jet hand appliance for personal hygiene, for receiving liquid pressure pulses from a pump unit through a flexible tube, said hand appliance comprising a. an elongated casing having an inlet passage for receiving said liquid pressure pulses and an outlet passage extending to the front end of the appliance, b. a generally cylindrical chamber extending longitudinally of said casing having an outlet at the rear end thereof connected with said outlet passage, an opening to the atmosphere at the front end thereof, and an inlet at the side thereof intermediate said outlet and opening and connected with said inlet passage, c. a bistable valve mechanism including a sealing ring at the chamber outlet and a longitudinally movable control rod passing into the chamber through said opening and having a valve member at the rear end thereof of larger diameter than the rod, d. a manual control member mounted near the front end of said appliance and attached to said rod, e. means for establishing a rear position of said rod in which said valve member engages said sealing ring to prevent liquid flow thereby and a forward position disengaging the valve member from the sealing ring, f. guide means for said valve member positioned near said sealing ring and having an opening for flow of liquid through the chamber outlet in the disengaged position of the valve member, g. and a slidable sealing member slidably mounted on said rod between said valve member and said opening and engaging the cylindrical wall of said chamber, h. said slidable sealing member having a forwardly projecting annular resilient lip engageable against the front wall of said chamber around said opening.

Claim 9

A liquid jet hand appliance for personal hygiene, for receiving liquid pressure pulses from a pump unit through a flexible tube, said hand appliance comprising a. an elongated casing having an inlet passage for receiving said liquid pressure pulses and an outlet passage extending to the front end of the appliance, b. a generally cylindrical chamber extending longitudinally of said casing having an outlet at the rear end thereof connected with said outlet passage, an opening to the atmosphere at the front end thereof, and an inlet at the side thereof intermediate said outlet and opening and connected with said inlet passage, c. a bistable valve mechanism including a sealing ring at the chamber outlet and a longitudinally movable control rod passing into the chamber through said opening and having a valve member at the rear end thereof of larger diameter than the rod, d. a manual control member mounted near the front end of said appliance and attached to said rod, e. means for establishing a rear position of said rod in which said valve member engages said sealing ring to prevent liquid flow thereby and a forward position disengaging the valve member from the sealing ring, f. guide means for said valve member positioned near said sealing ring and having an opening for flow of liquid through the chamber outlet in the disengaged position of the valve member, g. and a slidable sealing member slidably mounted on said rod between said valve member and said opening and engaging the cylindrical wall of said chamber, h. said slidable sealing member having a forwardly projecting annular resilient lip engageable against the front wall of said chamber around said opening.

Claim 10

A hand appliance according to claim 7 in which said slidable sealing member has annular grooves in each end thereof and said resilient lip projects forwardly and inwardly from the portion of the member outside the forward annular groove therein.