Valves and valve actuation – Mechanical movement actuator – Plural dissimilar mechanical movements
Patent
1998-02-02
1999-05-04
Walton, George L.
Valves and valve actuation
Mechanical movement actuator
Plural dissimilar mechanical movements
251279, 251302, 251327, F16K 302
Patent
active
058994386
ABSTRACT:
A gate valve has a manual actuator that includes a crank having a direct pivotal connection with a slidable valve plate. The valve plate has a teardrop configuration that enables the valve plate to swing around the pivot connection as the plate slides along guide slot edge surfaces, between a closed position and an open position. Only a relatively small manual force is required to operate the valve.
REFERENCES:
patent: 2701117 (1955-02-01), Bashark
patent: 3237916 (1966-03-01), Bryant
patent: 3249117 (1966-05-01), Edwarde
patent: 3788346 (1974-01-01), Fitzgerald
patent: 4875504 (1989-10-01), Nicholson
patent: 5439198 (1995-08-01), Reed
patent: 5445190 (1995-08-01), Gunder
Chandler Charles W.
Walton George L.
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