Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Headed fastener element with nut – washer – securing means or cap – Headed bolt or screw with threads and complementary nut
Patent
1991-06-17
1993-01-19
Wilson, Neill R.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Headed fastener element with nut, washer, securing means or cap
Headed bolt or screw with threads and complementary nut
411542, 4051501, 405151, 52410, F16B 3300, F16B 4302, E21D 1100
Patent
active
051802708
ABSTRACT:
A seal for leaking fissures or faults of a tunnel which has a first, deformable layer with two surfaces, one of which is scalloped in vertical cross-sectional dimension and the other of which abuts a second flexible layer of more dense material such as neoprene. The surface of the second layer remote from the first layer is overlain about its periphery by strapping preferably made from steel. The seals are generally rectangular in horizontal plan and if the seal is sufficiently elongated intermediate strappings are provided between the width end straps as required. A plurality of registering apertures are provided in the first and second layers and the strapping material to receive therethrough elongated self-threading concrete screws for securing the seal into pilot holes in the tunnel surface around a leaking fissure or fault.
REFERENCES:
patent: 2529411 (1950-11-01), Northrup
patent: 3141478 (1964-07-01), Copeland
patent: 3480043 (1969-11-01), Proudfoot et al.
Cooper Dennis B.
Driscoll Daniel F.
Swartwout, III Willis B.
Wilson Neill R.
LandOfFree
Water flow patch does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Water flow patch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Water flow patch will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-99525