Seal for a joint or juncture – Seal between fixed parts or static contact against... – Contact seal for a pipe – conduit – or cable
Reexamination Certificate
2005-09-27
2005-09-27
Pickard, Alison K. (Department: 3676)
Seal for a joint or juncture
Seal between fixed parts or static contact against...
Contact seal for a pipe, conduit, or cable
C277S626000, C277S921000, C052S396020
Reexamination Certificate
active
06948716
ABSTRACT:
An improved waterstop having the important added feature of a hydro expansive compound which expands when subjected to water. By expanding, the hydro expansive compound effectively blocks the passage of water that leaks into the gaps created during the shrinkage of the concrete surrounding the improved waterstop. All that is required are narrow strips of judiciously positioned hydro expansive compound at opposite ends of the improved waterstop.
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“Canadian General Standard Board” Jul. 1983 p. 5.
“Evolution of Watertight Construction . . . ” John H. Scarino p. 51 Int. Concrete Apr. 1981.
NRCA Water Proofing & Dampproofing Manual Dec. 1993.
Canadian Portland (French) pp. 2,3,4.
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