The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 23, 1994
Filed:
Apr. 14, 1993
Carl R Griffiths, Lansing, MI (US);
Thunderline Corporation, Belleville, MI (US);
Abstract
Pressure hardware for a seal block assembly used to form a modular, annular seal around a conduit passing through a wall, the assembly including elastomer seal blocks joined in an annulus around the conduit, the seal blocks having pressure bolt apertures parallel to the conduit; the seal blocks are axially compressed and radially expanded to form the seal. The pressure hardware is in sets each including a bolt, a matching nut, and a first molded resin pressure plate having a recess large enough for freely rotatably seating the bolt head, with peripheral access for a wrench; a washer is rotatably positioned in the bottom of the recess, which is deep enough so that the bolt head does not project substantially. The bolt rod extends through a bolt-receiving aperture in the first pressure plate. A second molded resin pressure plate has a socket complementary to the nut, which seats in the socket non-rotatably relation and a bolt-receiving aperture allow the bolt rod to engage the nut; in one form, the socket has crush ribs to hold the nut firmly in place. In another embodiment, the second molded resin pressure plate has a threaded bolt-receiving aperture in which the bolt rod engages. Also disclosed are resin caps that inhibit corrosion of the metal parts of the assembly.