Valves and valve actuation – With means for blocking or disabling actuator – Released by non-valving actuator motion
Patent
1994-02-16
1995-05-30
Walton, George L.
Valves and valve actuation
With means for blocking or disabling actuator
Released by non-valving actuator motion
251104, 251110, 251205, 251265, 251285, F16K 102, F16K 150, F16K 152, F16K 3150
Patent
active
054195306
ABSTRACT:
A micro-valve assembly for providing precise regulation of fluid flow between an input port and an output port comprises a valve body configured to installed with the valve assembly and forming therewith a fluid flow chamber between the fluid flow rate control port and the output port, the valve body having an internally threaded cylindrical portion. A rotatable valve adjustment member has an externally threaded cylindrical portion sized to engage the internally threaded cylindrical portion of the valve body. The externally threaded cylindrical portion of the rotatable valve adjustment member has an internally threaded axial bore. The internally threaded bore of the rotatable valve adjustment member has a longitudinal axis and a pitch finer than that of the externally threaded cylindrical portion thereof. A valve stem has an externally threaded shaft portion, sized to engage and being threaded into the internally threaded axial bore of the cylindrical portion of the rotatable valve adjustment member, and a poppet member disposed at one end of the externally threaded shaft. The poppet member is sized to close the fluid flow rate control port of the valve assembly when brought into engagement with the seat. The valve stem is axially translatable within the internally threaded axial bore of the cylindrical portion of the rotatable valve adjustment member by the rotation of the rotatable valve adjustment member about the longitudinal axis, thereby controlling the position of the poppet member relative to the seat of the fluid rate control port.
REFERENCES:
patent: 633217 (1899-09-01), Qurin
patent: 1007338 (1911-10-01), Cochrane et al.
patent: 1523953 (1925-01-01), Giesler
patent: 3098637 (1963-07-01), Baustian
patent: 3409271 (1968-11-01), Kallenbach
patent: 3428291 (1969-02-01), Callahan, Jr. et al.
patent: 4483512 (1984-11-01), Drapeau
Teknocraft, Inc.
Walton George L.
Wands Charles E.
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