US PATENT SUBCLASS 251 / 89
WITH MEANS FOR BLOCKING OR DISABLING ACTUATOR

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

89WITH MEANS FOR BLOCKING OR DISABLING ACTUATOR {6}
89.5  DF  .~> Actuator, or blocking means, includes flow path joint
90  DF  .~> Attachments {2}
94  DF  .~> Fluid pressure biased latch
95  DF  .~> Released by non-valving actuator motion {3}
101  DF  .~> Latch manipulator mounted on handle or stem {3}
111  DF  .~> Latch manipulator mounted on valve body {3}

DEFINITION

Classification: 251/89

(under the class definition) Subject matter wherein means are provided for detaining, blocking or disabling a valve actuator, the actuator being restrained against motion away from the point at which the detent or holding means engages it.

(1) Note. The blocking or disabling means of this subclass is not a part of the valve actuator and the unblocking or disabling does not actuate the valve.

(2) Note. Valve actuating mechanisms having a separately actuated clutch which disables the mechanism are included.

SEE OR SEARCH THIS CLASS, SUBCLASS:

66+, for valves provided with biased trips whose latches or detents are analogous to the blocking or disabling means above, and see the search notes to subclass 66.

79+, for yielding connectors, e.g., slip clutch, in a valve actuating mechanism. See (2) Note.

230, for ratchet operating mechanisms in which detents are used in holding valves between ratcheting. 284+, for limit stops for valve actuators, these preventing further motion in one direction but allowing retrograde movement, and see the search notes thereto.

297+, for frictional detents.

SEE OR SEARCH CLASS

74, Machine Element or Mechanism,

527+, and all other appropriate subclasses for detents for control lever and linkage systems.

137, Fluid Handling,

303, for means for disabling stop and waste valves in hydrants, as for summer conditions, subclasses 382+ for valve guards which prevent access to a valve or its actuator, subclasses 383+ for arrangements wherein the valve is locked or sealed against unauthorized use and subclasses 523+ for valves directly responsive to line condition change which are provided with means for latching them open.

222, Dispensing,

43, and 44 for dispensers having discharge controlling stops and/or detents combined with indicating means.