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US 4,059,935 AGranted
Post-applied waterstop
AssigneeW. R. Grace & Co.
InventorRobert W. Faid
Life of this patent
Estimating the term…
Abstract
Waterstop for use in jump or slip casting of concrete comprising two strips of T-shaped transverse cross-section which can be fastened together by means of bars and bolts after the first strip has been embedded at the edge of a concrete mass. After fastening the second strip to the first, the second mass of concrete is poured to embed said second strip.
Claims12
A waterstop member in the form of a solid strip made of resilient elastomeric material for use in a post-applied waterstop assembly employed to seal the joint between two concrete bodies, said waterstop comprising in transverse cross-section;
- (a) a central web to be anchored in said concrete and joined by one of its two edges to the median of (b) a crossweb, thereby forming a substantially T-shaped cross-section, the said central web (a) constituting the lower, downwardly-extending leg of said T, the said crossweb (b) constituting the upper, horizontally-extending leg of said T, said central web further in cross section having thickened areas at locations generally removed from its edge joined to said crossweb, which thickened areas resist withdrawal of said central web from said concrete;
- said crossweb having perforations preformed therethrough along the length thereof, said perforations being regularly distributed on each side of the central web, said crossweb further having a substantially flat surface remote from its surface to which the said central web is joined for engaging in sealing relationship with another said substantially flat surface of a second like waterstop member.
Dependencies are inferred from the claim text.