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SHUT-OFF VALVE FOR FLOW CONDUITS
US 3,482,603 A
Filed
: 08/03/1967
Issued
: 12/09/1969
Est. Priority Date
: 08/03/1967
Status: Expired due to Term
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Current Assignee
Dale E. Outcalt
Original Assignee
Dale E. Outcalt
Inventors
Outcalt, Dale E.
Application Number
US04/658,138
Time in Patent Office
859 Days
Field of Search
US Class Current
137/515.5
CPC Class Codes
E21B 2200/05
Flapper valves
E21B 34/08
responsive to flow or press...
F16K 15/033
spring-loaded
Y10T 137/7856
Valve seat formed on or car...
Y10T 137/7898
Pivoted valves
Y10T 137/7901
Valve head movably connecte...
Y10T 137/7923
With means to protect sprin...
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