Valves and valve actuation – Rotary valves
Patent
1974-05-17
1976-05-25
Cline, William R.
Valves and valve actuation
Rotary valves
251318, 13762517, F16K 1102
Patent
active
039587924
ABSTRACT:
A novel cylindrical valve plug for the ported bore in valve, particularly a class of hot and cold water mixing valves, is disclosed. The plug, in an illustrative embodiment, comprises an inner cylindrical core, a non-metallic, yieldable elastic sleeve compressed about the sleeve, and placed under radial compression inside the valve bore, so as to bear and exert pressure radially outward on the inner wall of the valve bore.
A multiplicity of small serrations on the surface of the core penetrate partially (but with non-cutting indentation rather than puncture) into the sleeve when the sleeve is compressed, leaving air pockets in the valleys of the serrations. When, owing to any cause, such as temperature rise, the compression of the sleeve rises, it expands elastically into the "breathing space" afforded by these pockets, instead of increasing the radial pressure between the valve plug and the valve bore, such as would increase the resistance to turning or to axial travel of the valve plug. The plug can compensate not only for increase or reduction in temperature, but also for wear, erosion, corrosion, or dimensional variations.
REFERENCES:
patent: 2225081 (1940-12-01), O'Hare
patent: 2501657 (1950-03-01), Barkelew
patent: 2634946 (1953-04-01), Mueller et al.
patent: 2864579 (1958-12-01), Stoltenberg
patent: 2961214 (1960-11-01), Freed
patent: 3314644 (1967-04-01), Dwyer et al.
patent: 3432143 (1969-03-01), Johnson
Cline William R.
Lilly Forrest J.
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