US PATENT SUBCLASS 251 / 315.01
.~ Ball valve

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


251 /   HD   VALVES AND VALVE ACTUATION

304  DF  ROTARY VALVES {5}
315.01.~ Ball valve {7}
315.02  DF  .~.~> Having a particular hardness (i.e., durometric property)
315.03  DF  .~.~> Of specific material {2}
315.06  DF  .~.~> Having a swinging actuator
315.07  DF  .~.~> Eccentric seating
315.08  DF  .~.~> Including trunnion opposite axially extending actuating means {1}
315.1  DF  .~.~> Housing construction {4}
315.16  DF  .~.~> Ball construction

DEFINITION

Classification: 251/315.01

Ball valve:

(under subclass 304) Rotary valve comprising a housing having

a flow passage therethrough and a valve seat; with a spherical head that contacts the seat and can be rotated about an axis passing generally through its geometrical center by an actuating means.

(1) Note. Patents to be classified in the subclasses "Ball valve'' to "With removable trunnion cover'' of this Class 251 subclasses 315.01-315.09 and "Ball construction'' of this Class 251 subclass 315.16 are properly classified when placed in the appropriate subclasses "Housing construction'' of this Class 251 subclasses 315.1-315.15. For example, claims to a ceramic housing assembled around the valve head would be classified in this Class 251 subclass 315.04 for the original reference and cross-references of this Class 251 subclass 315.13.