US 6,082,741 A · Resilient pipe gasket

Abstract

A resilient gasket is disclosed for providing a seal between corrugated pipes having a plurality of concentric ribs on their outer surfaces, such as drain and sewer pipes to be buried in soil. The gasket comprises a base which is received around a first pipe over top of a rib adjacent an end of the first pipe, with an inner surface adapted to mate with a radially outer surface of the rib, and with legs adapted to extend along forward and rearwardly-sloped faces of the rib. The outer surface of the base is provided with sealing elements to engage the inner surface of the bell adjacent the end of a second pipe. The gasket also has a flap extending outwardly and forwardly from the forwardly extending leg. The flap and the forward leg form a V-shaped member. The flap engages the inner surface of the bell when the first pipe is inserted into the second pipe, and the gasket is rotated rearwardly relative to the rib. When the flap engages the inner surface of the bell, it prevents further rearward displacement of the gasket relative to the rib, thus preventing displacement of the gasket from the rib. The gasket also helps prevent gasket blowout during periods of unusually heavy water flow through the pipes.

Claims19

Dependent claims

A resilient, annular pipe gasket for forming a seal between an annular rib provided on a radially outer surface of a first pipe and a radially inner surface of a second pipe, the rib having a radially outer surface, an axially forward side facing the end of the first pipe and an opposite axially rearward side, the first pipe and the second pipe being adapted to mate with a portion of the first pipe having the annular rib being received in the second pipe, the pipe gasket comprising:

(a) a sealing base having a radially inner surface and a radially outer surface provided with sealing means;
(b) a forward leg extending radially inwardly from an axially forward portion of the base;
and
(c) a flap extending radially outwardly and axially forwardly from a radially inner portion of the forward leg, the flap having a pipe engaging surface at a radially outer portion of the flap,
wherein a first radial distance between the radially inner surface of the base and a radially outermost portion of the sealing means is greater than a second radial distance between the radially inner surface of the base and the pipe engaging surface of the flap, and wherein the first radial distance is less than a third radial distance between the radially inner portion of the forward leg and the pipe engaging surface.

2 more elements

Dependencies are inferred from the claim text.

Resilient pipe gasket

Life of this patent

Resilient pipe gasket

Life of this patent

Abstract

Claims19