×

Cleanout fitting with lockable and removable check valve

  • US 4,259,983 A
  • Filed: 12/08/1978
  • Issued: 04/07/1981
  • Est. Priority Date: 12/10/1977
  • Status: Expired due to Term
First Claim
Patent Images

1. A cleanout fitting comprising:

  • a one-piece tubular body having relative to a normal direction of flow through said body an upstream end and a downstream end, said body being unitarily formed withan upwardly open well between said ends,a downward upstream step adjacent said upstream end,a downward downstream step within said well,a downwardly U-shaped abutment at and concave toward said upstream step and forming therewith a downstream-facing upstream insert seat, anda formation at and forming with said downstream step a U-shaped downstream seat open upwardly and away from said downstream step;

    an insert snugly receivable in one of said seats; and

    a cover sealingly engageable over said well.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×