Resources Contact Us Home
Drainage valve pipe tap assembly

Image Number 4 for United States Patent #6681796.

A drainage valve tap assembly for connection of a branch line to a main line while simultaneously forming a freeze proof drain comprising a hollow body having a first end and a second end, a cutting tube attached to the first end of the body; a handle having a hollow interior, the handle attached to the second end of the body for rotating the body; and a resilient drain plug extending at least partially in the body for blocking off the flow of water therethrough under a water pressure and for allowing the draining of water therethrough and out of the drainage valve when the water pressure is cut-off.

  Recently Added Patents
Localized biasing for silicon on insulator structures
Tournament qualification and characteristics in a gaming system
Thin film transistor manufacturing method, thin film transistor, thin film transistor substrate and image display apparatus, image display apparatus and semiconductor device
LED lamp for producing biologically-corrected light
Sport footwear
Method and apparatus for the simultaneous generation and detection of optical diffraction interference pattern on a detector
Thin film emitter-absorber apparatus and methods
  Randomly Featured Patents
Actuation system for a gas turbine engine exhaust device
Method of making semiconductor memory device
Capacitance difference detecting circuit and capacitance difference detecting method
Transmitter and receiver using asymmetric transfer characteristics in differential amplifiers to suppress noise
Pit-less elevator
Attachment system for the spokes of a bicycle wheel
Local convergence cabinet
Method for measuring the local hydraulic permeability of a sub-group of hollow fibre of a bundle of hollow fibres
Closing device for original cover
Construction material, composition and process for producing the same