Resources Contact Us Home
Non-freeze wall hydrant

Image Number 4 for United States Patent #4286616.

In a wall hydrant, on the inner and outer ends of a wall-penetrating conduit, an inlet connection casting and a discharge casting; a valving member movable axially in an inlet valving bore relative to a seat; a lateral conduit outlet from a discharge casting bore; a shaft structure including key-rotated stem threaded through a plug in the latter bore end and connected axially to shift, upon rotation, the valving member, and also a shaft-carried flange "O"-ring sealable on an interior surface controlling plug-associated exterior draining and air vent openings; the valving and flange seals being spaced, relative to the controlling surface and inlet bore spacing, for conduit drainage and vent opening after inlet closure; a part of the shaft structure upon removal being invertable to serve as a valve seat service tool. Within the hydrant, an anti water backup device. A hydrant wall box, and a vacuum breaker including a discharge casting outlet enlargement with a cap having a hose connection and with the enlargement defining air vents; a hollow flexible elastomeric element with an open-ended inner end portion fitted into the mating enlargement end and having an outer end seal portion to outwardly seal the vents, and a headed member within the flexible element shiftable with water flow outwardly against the seal portion to increase vent sealing pressure and biased inwardly; the head being plurally through-apertured radially inward of vent-closing seal contact; the seal portion being flexible inwardly to open the vents, and further to seal upon the head, whereby back flow is prevented and the air vents opened for hose drainage and/or vacuum breaking.

  Recently Added Patents
Synthesized interoperable communications
Method, preprocessor, speech recognition system, and program product for extracting target speech by removing noise
Image processing apparatus and method configured to calculate defocus amount of designated area
Automatically capturing images that include lightning
IC layout parsing for multiple masks
Visualization of information associated with applications in user interfaces
Semiconductor device and method for fabricating the same
  Randomly Featured Patents
Peptide nanostructures containing end-capping modified peptides and methods of generating and using the same
5-Diazacycloalkyl imidazo[1,2-c][1,3]benzodiazepines
Inflatable device for use in surgical protocols relating to treatment of fractured or diseased bones
JTAG bus communication method and apparatus
Composition and method for electrodeposition of copper
Two-dimensional, Josephson-array, voltage-tunable, high-frequency oscillator
Knock-down table
Ecologist flexible trash bag receptacle
Configuration method of radio resource in mobile communication network
Disk carrier device and disk drive