Valve body guard

Details Valve body guard Valve body guard

1991-08-23

1992-11-10

Denion, Thomas E.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

92168, 74 182, 277212FB, F15B 910

Patent

active

051614545

ABSTRACT:
A guard means for protecting a valve body extending from a hub of a servomotor. The valve body has a base with a plurality of openings therein through which mounting bolts attach the guard means to the housing of the servomotor, a bellows section having a first diameter extending from the base and connected to a second diameter by a taper, and an end member connected to the second diameter of the bellows section. The bellows section has a plurality of pleats, a portion of which are selectively locked in either a compressed position or an extended position to locate the end member adjacent the end of the valve body when the valve body is in its fully extended position. The pleats in the first diameter of the bellows section have a different closure force than the second diameter to selectively establish which of the first and second diameters of the bellows section that will initially move to locate said end section adjacent the end of the cylindrical member.

REFERENCES:
patent: 3908704 (1975-09-01), Clement et al.
patent: 3995502 (1976-12-01), Jones
patent: 4279193 (1981-07-01), Satoh
patent: 4327925 (1982-05-01), Alexander et al.
patent: 4567728 (1986-02-01), Ohmi et al.
patent: 4649802 (1987-03-01), Myers

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