Gasket with locking lugs
AssigneeVertex, Inc.
InventorsWilliam C. Andrick, Michael J. Ferrara, Jr.
Life of this patent
Estimating the term…
Abstract
A pipe gasket includes a toroidal gasket body and projections extending away from a peripheral surface of the gasket body. The gasket body is configured to allow the gasket body to roll along a spigot end of a first pipe as the spigot end is received inside a bell end of a second pipe. The projections each include a first surface and a second surface. The first surface is configured to facilitate rotation of the gasket body in a first rotational direction. The second surface is configured to inhibit rotation of the gasket body in a second, opposite, rotational direction.
Claims24
A pipe gasket comprising:
- a toroidal gasket body configured to allow the gasket body to roll along a spigot end of an associated first pipe as the spigot end is received inside a bell end of an associated second pipe;
- and
- at least two projections extending away from a peripheral surface of the gasket body and spaced from one another around the peripheral surface, each projection including a first surface and a second surface which extend away from the peripheral surface at an angle, each first surface being inclined at a shallow angle to the peripheral surface and configured to facilitate rotation of the gasket body in a first rotational direction and each second surface being inclined at a steep angle to the peripheral surface and configured to inhibit rotation of the gasket body in a second, opposite, rotational direction, wherein each first surface is inclined in a similar direction with respect to the peripheral surface as the gasket body rolls along the spigot end of the associated first pipe.
A directional pipe gasket for a bell and spigot pipe joint, the gasket comprising:
- a gasket body formed of a flexible material and having a peripheral surface;
- at least two locking projections extending away from a the peripheral surface of the gasket body, each projection having a leading surface inclined at a shallow angle to the peripheral surface to allow a rolling of the gasket body in a first rotational direction along a spigot end of a first associated pipe as the spigot end is received inside a bell end of a second associated pipe, wherein each of the at least two locking projections has substantially the same dimensions as each other one of said at least two locking projections;
- and
- at least one ridge extending from the peripheral surface of the gasket body interposed between the locking projections, wherein each projection extends a greater distance from the peripheral surface than each ridge.
A directional pipe gasket comprising:
- a toroidal gasket body having a peripheral surface that is spaced by a first substantially constant radius from an interior point of the body to facilitate rolling of the gasket body along a spigot end of a first associated pipe when the spigot end is received inside a bell end of a second associated pipe;
- and
- n locking projections protruding away from the peripheral surface, where n is greater than one, wherein the locking projections are angularly displaced from one another around the peripheral surface and each of the n projections includes an apex that is spaced a second substantially constant radius from the interior point of the body, wherein the second radius is greater than the first radius, but the second radius is small enough to allow the gasket body to roll along the spigot end of the first associated pipe when the spigot end is received inside the bell end of the second associated pipe, wherein the locking projections have a first surface inclined at a shallow angle with respect to the peripheral surface of the gasket body that facilitates rotation of gasket body in a first rotational direction, and the locking projections have a second surface that is opposite the first surface, the second surface being inclined at a steep angle with respect to the peripheral surface of the gasket body that inhibits rotation of the gasket body in a second rotational direction, which is opposite the first rotational direction.
Dependencies are inferred from the claim text.