# US 4,405,159 A · Waste disposer coupling

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- Number: US 4,405,159 A
- Document ID: US4405159A
- Status: Granted
- Kind: A
- Application number: 06/274,069
- Filed: 1981-06-16
- Granted: 1983-09-20
- Earliest claimed: 1981-06-16
- Assignees: Wastemate Corporation
- Inventors: Leonard G. Spelber
- Web page: https://patentgrep.com/patent/US4405159A

## CPC

- F16L 41/14: by screwing an intermediate part against the inside or outside of the wall {(F16L41/086 takes precedence)}
- E03C 1/22: Outlet devices mounted in basins, baths, or sinks (stoppers A47K1/14)
- F16L 21/005: {made of elastic material, e.g. partly or completely surrounded by clamping devices (comprising packing adapted to sealing by fluid pressure F16L17/04)}
- F16L: PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- E03C: DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER (not connected to either water-supply main or to waste pipe A47K; devices of the kind used in the ground E03B, E03F); SINKS

## Abstract

A coupling device for coupling a waste disposer unit to a sink, including a drain conduit with a flange for fitting against the sink and a collar having external threads positioned over the conduit. A locking ring is in threaded engagement with the collar for retaining the drain conduit securely to the sink. A resilient sealing ring is positioned over the bottom of the conduit and the top of the disposer and securing means is placed over the sealing ring to hold the assembly together.

## Claims

### Claim 1

A coupling device for attaching a waste disposer unit having a circumferential groove near the top thereof to a sink having a drain opening therein, comprising:
substantially cylindrical drain conduit means for inserting through the drain opening in the sink, said drain conduit means including a body, and a flange extending from said body for positioning adjacent the upper surface of said sink bottom around said opening;
a reduced portion on said conduit body forming a coolar seat;
substantially cylindrical collar means for positioning on said collar seat, and having external threads thereon, said threads being substantially co-extensive with the circumference of the conduit body in the assembled position;
a circumferential groove near the bottom of said collar means;
fastening means for fastening said collar means to said collar seat;
connector ring means having internal threads extending from one end part way in the axial direction for engaging the threads on said collar means to lock said drain conduit means to the sink bottom by pulling said flange toward said sink bottom, said connector ring means being capable of connection to said collar means with either end facing the sink bottom to accommodate sink bottoms of different thicknesses;
resilient sealing means having an upper boss extending inwardly therefrom for seating in the groove in said collar means and a lower boss extending inwardly therefrom for seating in the groove in the disposer; and
securing means surrounding said sealing ring means for securing said sealing ring means in position and pressing said bosses into sealing engagement with the side walls of said grooves.

### Claim 2 (depends on 1)

A coupling device according to claim 1 wherein said connector ring means includes circumferentially spaced rotating means on its surface for rotating said connector ring means.

### Claim 3 (depends on 1)

A coupling device according to claim 1 wherein said sealing ring means includes an upper flange and a lower flange; and
said securing means includes a strap which fits on said sealing ring means between said flanges.