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VALVE ASSEMBLY

  • US 3,621,877 A
  • Filed: 05/18/1970
  • Issued: 11/23/1971
  • Est. Priority Date: 05/18/1970
  • Status: Expired due to Term
First Claim
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1. A valve assembly for use with flowable and semiflowable material comprising a rectangular, hollow valve body having opposite sides, a top portion, a bottom portion and end portions, means within said valve body dividing said valve body transversely of its long axis into two chambers, each of said opposite sides of said valve body having a circular perforation communicating with each of said chambers, said perforations in said sides communicating with the same one of said chambers being coaxial, a hollow, disposable liner within each of said chambers, each of said disposable liners having an exterior surface conforming to the interior surface of its respective chamber, the interior of each of said liners forming a passage through said valve body between the adjacent pair of said coaxial perforations in said valve body sides, the end portions of each of said passages having a circular cross section of the same diameter as said coaxial perforations in said valve body sides between which it extends, each of said passages having a central portion of rectangular cross section, those portions of said passage between said circular end portions and said rectangular central portion comprising smooth uninterrupted surfaces, said valve assembly having a pair of flat, rectangular blades, each of said blades extending through an opening in one of said end portions of said valve body and an adjacent opening in one of the sides of said central rectangular portion of one of said liners, each of said blades being reciprocable within said central rectangular portion of its respective liner between a position wherein said passage formed by said liner is open and a position wherein said passage is closed.

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