Michael S Ruffu

US Patent:

54152410, May 16, 1995

Filed:

Aug 25, 1993

Appl. No.:

8/111464

Inventors:

Michael S. Ruffu - Seattle WA
Paul J. Shemeta - Seattle WA

Assignee:

TAC Inc. - Seattle WA

International Classification:

B25D 911

US Classification:

173212

Abstract:

A battering ram device is provided for allowing quick forcible entry through locked closures. The device includes a ram that slides within and partially out of a housing. The ram is connected to a piston which also slides within a cylindrical housing. The housing is connected to a firing mechanism that uses an explosive cartridge for driving the piston forwardly and subsequently forcing the ram partially out of its housing to deliver a blow to a closure. The piston and cylinder further include an energy absorbing mechanism for retarding the motion of the ram once it penetrates through a closure. The ram can be configured as a thin rectangular piece for allowing the ram to fit between a door knob and jamb of most doors. Other ram configurations include a punch for effectively knocking out a door lock of a steel or metal door, and a shearing head for effectively cutting a steel cable, bar, or wire.