Patents Assigned to H&M - AMH, Inc.
  • Patent number: 7201534
    Abstract: A manhole access way security apparatus and method for using the security apparatus are disclosed. The security apparatus includes an insert, at least one locking pin and a locking mechanism each interconnected to allow users to easily and quickly install a security barrier under a manhole, handhole or vault, and thereby prevent authorized access through the manhole, handhole or vault. The apparatus uses an insert that may either sit on the existing manhole frame rim under the manhole cover, or if there is insufficient clearance on the manhole frame rim, brackets may be installed under the manhole frame upon which the insert rests. In either configuration, the insert is secured in place under the manhole cover by one or more locking pins that extend radially through the insert and are then locked to the insert.
    Type: Grant
    Filed: April 18, 2005
    Date of Patent: April 10, 2007
    Assignee: H & M - AMH, Inc.
    Inventor: Gordon K. Dennis
  • Patent number: 6881007
    Abstract: A manhole access way security apparatus and method for using the security apparatus are disclosed. The inventive security apparatus includes an insert, at least one locking pin and a locking mechanism each interconnected to allow users to easily and quickly install a security barrier under a manhole, handhole or vault, and thereby prevent authorized access through the manhole, handhole or vault. The inventive apparatus uses an insert that may either sit on the existing manhole frame rim under the manhole cover, or if there is insufficient clearance on the manhole frame rim, brackets may be installed under the manhole frame upon which the insert rests. In either configuration, the insert is secured in place under the manhole cover by one or more locking pins that extend radially through the insert and are then locked to the insert.
    Type: Grant
    Filed: February 28, 2003
    Date of Patent: April 19, 2005
    Assignee: H&M - AMH, Inc.
    Inventor: Gordon K. Dennis