Tapered high pressure rotary feed valves

Details Tapered high pressure rotary feed valves Tapered high pressure rotary feed valves

2009-01-23

2011-11-08

Norman, Marc (Department: 3744)

Automatic temperature and humidity regulation

Thermostatic

In fluid controlled

C251S304000, C029S890120

Reexamination Certificate

active

08052065

ABSTRACT:
A tapered rotary feed valve is manufactured or refurbished for use in feeding materials into a high temperature environment, so as to reduce the time and expense of break-in operation, by shaping the tapered bore of the valve body at ambient temperature to have greater clearance around the rotor in a sector of the valve body that is cooler when the valve is at stable operating temperature. As a result, when the valve first reaches operating temperature after being manufactured or refurbished the rotor and the bore of the valve body nearly fit and can quickly wear in to fit each other closely.

REFERENCES:
patent: 2816693 (1957-12-01), Greaves et al.
patent: 3101853 (1963-08-01), Long et al.
patent: 3130879 (1964-04-01), Messing
patent: 3273758 (1966-09-01), Starrett
patent: 3353723 (1967-11-01), Wieleba
patent: 3633797 (1972-01-01), Graff
patent: 3708890 (1973-01-01), Weisselberg
patent: 3750902 (1973-08-01), Starrett
patent: 2002/0164392 (2002-11-01), Kazmer et al.
patent: 0732280 (1996-09-01), None

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