Manhole chimney seal
AssigneeThe Cretex Companies, Inc.
InventorsFrank J. Odill, David E. Anderson
Life of this patent
Estimating the term…
Abstract
An internal seal is disclosed between a manhole casting and mating manhole components such as concrete adjusting rings, the concrete manhole cone, or masonry structure of a similar configuration, to prevent water infiltration at this interface. The seal is formed by a continuous elastomeric ring. The ring is held in place by two stainless steel retaining bands. The elastomeric ring is pleated to allow an upward movement or lateral movement of the casting without impairing the sealing ability of the ring. The gasket can be installed either during construction or at any time after construction that there is found to be a problem with infiltration.
Claims15
A manhole seal for manhole assemblies of varying diameters having a manhole casting mounted on the manhole, the improvement comprising:
- sealing means for sealing the interface between the manhole casting and the manhole against infiltration of surface water without preventing ingress or egress to the manhole, the sealing means comprising:
- a generally cylindrical axially expandable rubber seal having sealing sections on each end thereof, the sealing section on one end thereof being adapted to be sealed to the inside surface of the manhole and the sealing section on the other end thereof being adapted to be sealed to the inside surface of the manhole casting;
- a retaining band associated with each of the sealing sections, both retaining bands having two end which overlap one another and when connected together form a continuous circular retaining band, each retaining band being adapted to extend around the periphery of the manhole assembly without obstructing ingress or egress thereto and to force the sealing section against the surface to be sealed;
- each sealing section having an aperture therein to receive the circular retaining bands;
- means for tangentially expanding each of the retaining bands to the diameter necessary to seal the sealing section against the surface to be sealed so that a continuous force is provided around the circumference of each sealing section to seal each of the sealing sections against the respective surfaces being sealed said means for tangentially expanding at least one of the bands comprising at least one aperture at each end of the band;
- and
- means for locking each of the expanded retaining bands so that the sealing means seals the interface between the manhole casting and the manhole against infiltration of surface water said means for locking at least one of the bands comprising at least one fastening means which extends through the aperture at each end of the band to lock the band after it has been expanded.
Dependencies are inferred from the claim text.