US PATENT SUBCLASS 251 / 315.16
.~.~ Ball construction
Current as of:
June, 1999
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251 /
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VALVES AND VALVE ACTUATION
304
DF
ROTARY VALVES
{5}
315.01
DF
.~ Ball valve {7}
315.16
.~.~ Ball construction
DEFINITION
Classification: 251/315.16
Ball construction:
(under subclass 315.01) Ball valve which relates to the structural design of the spherical valve head.