Fluid handling – With heating or cooling of the system – Circulating fluid in heat exchange relationship
Patent
1977-03-23
1979-06-19
Rosenthal, Arnold
Fluid handling
With heating or cooling of the system
Circulating fluid in heat exchange relationship
137613, 74 96, 74470, 251 78, 251 86, 251333, 251 58, F16K 3116, F16K 4900, F16K 142
Patent
active
041583671
ABSTRACT:
A valve actuator, for example a mechanism for imparting motion to a blast furnace evacuation valve, includes a force generator which is coupled to the valve member by a displacement mechanism including a pivotal lever and a pivot arm. The pivotal lever has a pair of angularly related arms with the free end of one arm being coupled to the force generator and the free end of the second arm being coupled to a point on the pivot arm intermediate the ends thereof by a connecting rod or rods. The pivot arm is connected to the valve member and the connecting rod or rods are articulated to both the pivot arm and to the second lever arm which may be telescoping.
REFERENCES:
patent: 543274 (1895-07-01), Speer
patent: 1439208 (1922-12-01), Veenschoten
patent: 1689799 (1928-10-01), Nordstrom
patent: 1881272 (1932-10-01), Grilli
patent: 2646065 (1953-07-01), Tyson
patent: 2965352 (1960-12-01), Coffey
patent: 3051196 (1962-08-01), Miller
Rosenthal Arnold
S.A. des Anciens Etablissements Paul Wurth
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