Control spear for use in a passage for conducting dust-containin

Details Control spear for use in a passage for conducting dust-containin Control spear for use in a passage for conducting dust-containin

1991-10-09

1992-09-29

Chambers, A. Michael

Fluid handling

With heating or cooling of the system

Circulating fluid in heat exchange relationship

251 86, F16K 4900

Patent

active

051507293

ABSTRACT:
A control spear serves to close and to controllably open a valve passage in a passage for conducting a dust-containing gas at temperatures of about 400.degree. to 1200.degree. C. The control spear comprises a shaft and a frustoconical head which cooperates with the valve passage. The shaft is movably mounted on the head and is preferably resiliently biased against the shaft.

REFERENCES:
patent: 2446196 (1948-08-01), Sitney
patent: 2479688 (1949-08-01), Lindgren
patent: 3259143 (1966-07-01), Powell et al.
patent: 3411528 (1968-11-01), Katsuhide

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