VALVE

  • US 3,771,561 A
  • Filed: 03/14/1972
  • Issued: 11/13/1973
  • Est. Priority Date: 03/14/1972
  • Status: Expired due to Term
First Claim
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1. In a valve for use in a conduit system at the juncture of a main conduit section with a pair of conduit sections branching therefrom, the combination comprising A. a body part comprising means including a pair of plate members respectively extending across the front and back of said valve and affording a sleeve which defines a narrow rectangular opening extending through said body part, B. a flat gate plate slidably projected through said opening and disposed with the opposite end portions thereof respectively extending beyond the opposite end portions of said body part, the opposite end portions of said opening being enlarged in transverse section whereby to form a pair of open pockets each extending about said gate plate and deep into the associated end of said body part, C. sealing means of a material having a low coefficient of friction slidably embracing said gate plate and nested deep in said pockets, D. a pair of collars slidably embracing said gate plate and extending respectively into said pockets a selected distance for securing said sealing means against displacement, E. an open ended conduit section carried by said back wall, one end portion thereof extending through an opening in said back wall and being set back a short distance from said gate plate, and the opposite end portion thereof being adapted for connection to said main conduit section, F. a pair of open ended conduit sections carried by said front wall, corresponding end portions of said conduit sections extending respectively through a pair of openings in said front wall and being set back a short distance from said gate plate, and corresponding opposite end portions thereof being adapted for connection respectively to said pair of branch conduits, G. sealing means embracing the conduit sections carried by said back and front walls and slidably engaging said gate plate to effectively serve as seats therefor, and H. means for actuating said gate plate.

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