US PATENT SUBCLASS 251 / 315.15
.~.~.~ Having inseparable head

Current as of: June, 1999
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251 /   HD   VALVES AND VALVE ACTUATION

304  DF  ROTARY VALVES {5}
315.01  DF  .~ Ball valve {7}
315.1  DF  .~.~ Housing construction {4}
315.15.~.~.~ Having inseparable head

DEFINITION

Classification: 251/315.15

Having inseparable head:

(under subclass 315.1) Housing wherein the body structure is unitary so that the spherical head cannot be removed without damaging the valve structure (i.e., housing permanently formed about the head by bending, welding, molding, etc.).