Retractable pre-rinse unit with automatic shutoff

Details Retractable pre-rinse unit with automatic shutoff Retractable pre-rinse unit with automatic shutoff

1986-02-11

1987-12-01

Rimrodt, Louis K.

Cleaning and liquid contact with solids

Apparatus

With movably or flexibly mounted spray or jet applying...

239576, 239588, 1376165, B08B 300, B05B 1508

Patent

active

047097159

ABSTRACT:
A pre-rinse unit incorporates a normally closed water shutoff valve connected to the lower end of a vertical riser pipe carrying a source of water. An outer tube is rotatably and longitudinally slidable on the riser pipe. A pair of rotatable arms are mounted for rotation at one end to the upper end of the vertical riser pipe above the outer tube for rotation about a horizontal axis and the arms carry cams contacting a cam follower ring whose lower surface abuts the outer tube. A concentric coil spring surrounding the vertical riser pipe and interiorly of the hollow tube, abuts a lower collar fixed to the riser pipe, interiorly of the tube, at its lower end and its upper end abuts the cam follower ring. Stop means carried by the riser pipe limits pivoting of the arms. At the outboard end of the arms, a hollow sleeve fixed to the arms at right angles thereto slidably receives a flexible hose connected at one end to the upper end of the riser pipe, whose opposite end bears a urethane foam insulated handle and spray head assembly. A set screw carried by the sleeve adjustably locks the hose to the arms and determines the vertical height position of the spray head. A cam fixed to the lower end of the hollow tube contacts a cam follower on a pivotable lever having an end remote from the cam follower which bears on a spring biased plunger of the shutoff valve to automatically open the shutoff valve in response to downward movement of the outer tube upon rotation of the paired arms by pull down of the handle and spray head assembly. Automatic termination of water supply occurs upon release of the handle and spray head assembly and reverse rotation of said paired arms.

REFERENCES:
patent: 1187125 (1916-06-01), Barnes
patent: 1621905 (1927-03-01), Russell
patent: 1709245 (1929-04-01), Adams
patent: 1714232 (1929-05-01), Morris
patent: 2853262 (1958-09-01), Reimann
patent: 2971520 (1961-02-01), Motis et al.

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