Stem and nut with bearing for use in a motor operated valve

Details Stem and nut with bearing for use in a motor operated valve Stem and nut with bearing for use in a motor operated valve

1994-08-02

1997-04-15

Walton, George L.

Valves and valve actuation

Mechanical movement actuator

Screw

744248VA, 2512495, 25112912, F16K 3150, F16K 3153

Patent

active

056201664

ABSTRACT:
A valve comprises a body for connecting to a pipe, the body having a passageway therethrough for communicating with the pipe; a member disposed within the passageway, the member being movable between open and closed positions for permitting and stopping flow through the pipe, respectively; a stem secured to the member; a nut operably secured to the stem, the nut being axially stationary relative to the stem and rotatable thereabout; an actuator for rotating the nut such that rotation of the nut causes the stem to move the member between the open and closed positions; a first bearing adapted to radially center the stem within the nut, the first bearing adapted to permit the stem to slide axially relative thereto; and a second bearing operably associated with the first bearing adapted to reduce rotational friction between the nut and the stem.

REFERENCES:
patent: 695838 (1902-03-01), Ritchie
patent: 2150813 (1939-03-01), Ball
patent: 2222699 (1940-11-01), Ball
patent: 2956188 (1960-10-01), White
patent: 3738183 (1973-06-01), Ball, Jr. et al.
patent: 4872903 (1989-10-01), Periou
patent: 5144851 (1992-09-01), Grimm et al.
patent: 5172600 (1992-12-01), Cissell et al.
patent: 5187992 (1993-02-01), Bald
patent: 5214972 (1993-06-01), Larson

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