Freeze valve apparatus

  • US 5,033,500 A
  • Filed: 10/29/1990
  • Issued: 07/23/1991
  • Est. Priority Date: 10/29/1990
  • Status: Expired due to Term
First Claim
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1. In freeze resisting valve apparatus, for controlling water flow, the combination comprising:

  • a) a vertically elongated, hollow valve body having a lower portion adapted for installation underground, the body having a lower water inlet associated with said lower portion, and an upper water outlet, for passing a stream of pressurized water through said body,b) a water reservoir adapted for installation underground and having communication with said body lower portion via an ejector port,c) a valve seat projecting in said lower portion of the body and having a narrowed passage extending upwardly and positioned to increase pressurized water flow velocity in proximity to said port, said ejector port being proximate the level of said seat,d) and a valve member tapering downwardly toward an apex always remaining in alignment with said narrowed passage as the stopper member moves toward and away from the seat to effect drainage of water in the valve body downwardly, in said body past the stopper to the reservoir when the stopper is closed on the seat with said apex at said narrow passage, and to effect inducing of water flow from the reservoir through said ejector port and into said stream and then upwardly in said body when the stopper is retracted upwardly from the seat,e) said reservoir being substantially coaxial with the stopper valve member and seat,f) there being a shaft connected with the stopper and extending upwardly in the body, the body having above said apex a reduced diameter eductor bore in which said shaft extends with annular clearance to form an eductor passage through which water flows to and from the stopper, said body having an enlarged bore with an upwardly tapering portion in which said apex extends, when spaced from the seat, said enlarged bore directly communicating with said eductor passage, said tapering bore portion located immediately above the level of said ejector port, said ejector port intersecting said enlarged bore, said seat located between said ejector port and said upwardly tapering bore portion.

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