Motor operated valve

Details Motor operated valve Motor operated valve

1996-11-04

1998-12-22

Rivell, John

Valves and valve actuation

Limit stop

Rotary valve

25112911, 251264, F16K 5100

Patent

active

058510036

ABSTRACT:
Objective To avoid undesirable contact between the moving side stopper and the fixed side stopper, to maximize the contact width at the time of hitting, to decrease damages, wearing, etc. to those stoppers, and to improve reliability of the moving side stopper and the fixed side stopper in terms of rigidity and durability. Solution To provide a motor operated valve comprising a valve body 20, a screw fed valve stem 30 and a shaft 35, a motor 10 which rotationally drive the aforementioned shaft 35, a sleeve 40 having a convexed moving side stopper 41 which is rotated with the aforementioned shaft 35 as a monolithic structure, and a fixed bearing washer having a convexed fixed side stopper 55 to which the aforementioned moving side stopper 41 hits, and where a clearance slope 41a to avoid hitting the fixed side stopper 55 is provided on the rear part, looking in the rotational direction, of the aforementioned moving side stopper 41.

REFERENCES:
patent: 1719801 (1929-07-01), Duffield
patent: 3651831 (1972-03-01), Gerdner
patent: 3929317 (1975-12-01), Cohn et al.
patent: 4394873 (1983-07-01), Switall
patent: 4423752 (1984-01-01), Psarouthakis
patent: 4832311 (1989-05-01), Kimura

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