US PATENT SUBCLASS 137 / 377
.~ Guards and shields

Current as of: June, 1999
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137 /   HD   FLUID HANDLING

343  DF  WITH CASING, SUPPORT, PROTECTOR OR STATIC CONSTRUCTIONAL INSTALLATIONS {7}
377.~ Guards and shields {5}
378  DF  .~.~> Resilient abutment for preventing breakage
379  DF  .~.~> Nozzle abutment for scratch or damage prevention
380  DF  .~.~> Cover for beer cooler aperture for faucet
381  DF  .~.~> Sanitary covers or shields
382  DF  .~.~> Valve guards {1}

DEFINITION

Classification: 137/377

(under subclass 343) Devices in which the fluent material handling device or a part thereof is totally or partially surrounded by a casing (1) to prevent damage to an object external to the device, (2) to seal the device against leakage to or from the device outside the normal fluid path, (3) to protect the device or parts thereof or the contents against damage or contamination by contact with external objects, dirt or germs, or (4) to prevent unauthorized use.

(1) Note. The guard or protector must be external to the system, so that it does not serve to confine or control the material in the system nor to close the flow openings of the system.

SEE OR SEARCH THIS CLASS, SUBCLASS:

294+, for hydrant casings, especially subclass 296 for a cap, cover or hood used as a guard on a hydrant.

317, for antisplash shields used to prevent escape of fluid when a pressure system is tapped.

375, for casings which are close fittings or of a shape generally corresponding to that of the device, and substantially complete, and see the search notes thereto.

383+, for locks or seals to prevent unauthorized use. SEE OR SEARCH CLASS

222, Dispensing,

182, for covers for the operating parts of dispensers; subclass 192 for bumpers and guards for dispensers.

251, Valves and Valve Actuation,

89+, for valves provided with actuator disabling means to prevent unintentional operation.