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Single-handle mixing valve

  • US 4,187,880 A
  • Filed: 06/29/1978
  • Issued: 02/12/1980
  • Est. Priority Date: 07/14/1977
  • Status: Expired due to Term
First Claim
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1. A single-handle mixing valve comprising:

  • a valve casing having a central bore, a pair of first fluid inlets and a first fluid outlet;

    a cylindrical sleeve within said bore and including a pair of radially disposed inlet bores in communication with said first fluid inlets and a fluid outlet bore in communication with said first fluid outlet;

    a hollow piston disposed within said sleeve, said piston being rotatable to control the fluid mixing ratio and axially shiftable to control the fluid flow volume;

    a pair of sealing elements, each sealing element being carried in a corresponding one of said inlet bores;

    each of said sealing elements comprising;

    a rim-type molded body having a central aperture and arcuately formed to correspond to the outer surface curvature of said piston, and a sealing cord ring buttoned on said molded body, said sealing cord ring providing a seal between said sleeve and said casing and between said sleeve and said piston;

    said piston having a plurality of longitudinal slots radially arranged along the axial direction of said piston, each of said slots having a length and a width of smaller dimension than the cross-sectional diameter of said sealing cord ring; and

    noise silencing means disposed within said piston.

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