Outside screw-and-yoke type valve

Details Outside screw-and-yoke type valve Outside screw-and-yoke type valve

1981-06-15

1984-08-07

Chambers, A. Michael

Fluid handling

With indicator, register, recorder, alarm or inspection means

Position or extent of motion indicator

137797, 251327, 251329, 251267, F16K 3700

Patent

active

044637772

ABSTRACT:
One or more grooves are provided to weaken a portion of the stem nut, retaining nut, or yoke bush in a disk/gate valve to provide selective breakage to limit axially directed forces transmittable through the stem and stem connection. Clearances between the valve body and the non-weakened nut or bush portion to permit axial movement of the latter relative to the former following breakage to provide visual indication of breakage.

REFERENCES:
patent: 940239 (1909-11-01), Dikkers
patent: 2249848 (1941-07-01), O'Brien
patent: 2732855 (1956-01-01), Hobbs
patent: 2843152 (1958-07-01), Laird et al.
patent: 2905192 (1959-09-01), Velon
patent: 3701362 (1972-10-01), Reese
patent: 3768774 (1973-10-01), Baugh

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