Concrete manhole connector gasket
AssigneeS & B Technical Products, Inc.
InventorClaudio Dittel
Life of this patent
Estimating the term…
Abstract
An integrated connection for a manhole having a wall opening defining a peripheral surface and a ring shaped elastomeric body cast in place on the peripheral surface. The elastomeric body includes a foot region cast within the wall thickness of the manhole and connected to a leg region. The leg region terminates in a primary sealing surface. A reinforcing element passes through the ring shaped elastomeric body at one circumferential location which, when viewed in cross section, appears below the peripheral surface of the wall opening once the gasket is cast in place.
Claims13
An integrated manhole connection comprising:
- a manhole having a wall, the wall having an outside surface and an inside surface separated by a wall thickness;
- a wall opening communicating the outside and inside surface of the manhole for insertion of a mating pipe;
- the wall opening defining a peripheral surface relatively perpendicular to the outside surface of the manhole;
- a ring shaped elastomeric gasket body cast in place within a portion of the peripheral surface of the wall opening and having a substantially homogeneous composition which, when viewed in cross section, includes:
- a foot region enclosed within the wall thickness and connected to a leg region, the leg region terminating in a primary lip sealing surface of the gasket;
- and
- a rigid reinforcing ring which circumscribes and is encapsulated within the ring shaped elastomeric body and which passes through the elastomeric gasket body at a circumferential location which, when viewed in cross section, appears below the peripheral surface of the wall opening once the gasket is cast in place, the rigid reinforcing ring being located within the foot region of the gasket when the gasket is cast in place within the wall of the manhole, whereby the rigid reinforcing ring serves to more securely anchor the gasket within the cast manhole wall and thereby make the gasket more resistant to deformation during installation of the mating pipe within the wall opening.
A method of forming an integrated manhole connection for a concrete manhole, the method comprising the steps of:
- positioning a ring shaped elastomeric gasket body on a suitable concrete form, the gasket having a substantially homogeneous composition which, when viewed in cross section, includes:
- a foot region enclosed within the wall thickness and connected to a leg region, the leg region terminating in a primary lip sealing surface of the gasket;
- and
- a rigid reinforcing ring which circumscribes and is encapsulated within the ring shaped elastomeric body and which passes passing through the elastomeric gasket body at a circumferential location;
- casting concrete within the form and about the gasket body on the form so that the rigid reinforcing ring of the gasket, when viewed in cross section, appears below a peripheral surface of a wall opening in the concrete manhole once the gasket is cast in place, the rigid reinforcing ring being located within the foot region of the gasket when the gasket is cast in place within the wall of the manhole, whereby the rigid reinforcing ring serves to more securely anchor the gasket within the cast manhole wall and thereby make the gasket more resistant to deformation during installation of the mating pipe within the wall opening.
Dependencies are inferred from the claim text.