Abstract: A patch clamp for repairing holes and splits or cracks in pipes that convey liquids or gases having a unitary, cylindrical strap adapted to surround the pipe with a pair of opposed, interconnectable dogs forming the opposite ends thereof. The strap also includes two pairs of longitudinally extending grooves in the inner surface thereof located at substantially 180 degrees from one another. A resilient sealing strip to be positioned between the strap and the pipe against the hole or split to be repaired has one side conforming to the inner surface of the strap member and two spaced tongues having the same cross-sectional shapes as in one pair of the grooves in the strap member to form an interlocking connection therebetween. The other side of the strip has a convex surface facing the pipe which is compressed between the strap member and the pipe upon securing the dogs together by a threaded member.

Abstract: A floating cover for a liquid storage reservoir to prevent contamination of the stored liquid. The cover includes a continuous sheet of flexible material overlying the liquid and attached to the upper periphery of the reservoir, the area of the sheet being greater than the area encompassed by the upper periphery of the reservoir. The cover further includes floats in the central portion to float it higher than the peripheral portion whereby the excess material in the peripheral portion forms a depending rainwater collection sump..Iaddend.