DONALD K. COE
General Contractor at University Blvd, Albuquerque, NM
License number
New Mexico 25230098
Expiration Date
Apr 8, 2013
Category
Contractor
Address
Address
3041 University Blvd SE, Albuquerque, NM 87106
Phone
(505) 888-0104
Professional information
Manhole Cover Lock
US Patent:
3980329, Sep 14, 1976
Filed:
Apr 28, 1975
Appl. No.:
5/572698
Inventors:
Donald K. Coe - Albuquerque NM
Assignee:
Loc-Coe - Alburquerque NM
International Classification:
E05C 1918
US Classification:
292258
Abstract:
A manhole cover lock is provided employing two units diametrically situated and extending through openings in the manhole cover. The units engage a projection of the manhole cover housing to prevent the removal of the manhole cover when the units are in position. The units comprise a cylindrical body having a yoke at one end, a locking plate pivotally mounted in the yoke, with a flanged face opposite the yoke, and having a central recess. Extending through the body is an eccentric bore, in which a rod is housed, cooperating with said locking plate to provide a dog lock. A threaded bolt having a keyed head is threaded into a threaded axial bore in said body to prevent axial movement of said rod. An alternate embodiment of the threaded bolt includes modification of the head of the threaded bolt to allow the head to receive a special wrench for firmly tightening the threaded bolt thereby additionally securing the manhole lock in position.