Cleanout fitting with lockable and removable check valve
First Claim
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.
1 Assignment
0 Petitions
Accused Products
Abstract
A cleanout fitting has a tubular body adapted to be connected between a pair of conduits and having an upwardly open well defined between the upstream and downstream end of the body. This tubular body is formed internally with a downward upstream step and a downward downstream step. At its upstream step the body is also formed with a downwardly U-shaped abutment forming a downstream-facing upstream insert seat. At its downstream step the body has a plurality of ridges defining an upwardly open U-shaped seat. Inserts, normally check valves, have rings receivable in these seats and each have a valve flap engageable with the respective ring. A cover is sealingly engageable over the well, and also serves to hold at least the downstream insert in place in the respective seat.
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Citations
14 Claims
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1. A cleanout fitting comprising:
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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 with an 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, and a 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 Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A checkvalve-type cleanout fitting comprising:
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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 with an 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, and a 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 including a ring sealingly engaging said one seat and forming a valve seat, a valve body engageable with said valve seat, and a pivot supporting said valve body on said ring; and a cover sealingly engageable over said well.
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Specification