Stephen Moran

US Patent:

49846396, Jan 15, 1991

Filed:

Sep 29, 1989

Appl. No.:

7/414717

Inventors:

Edgar F. Lindsey - Roswell GA
Stephen G. Moran - Atlanta GA

International Classification:

E21C 2730

US Classification:

173100

Abstract:

A demolition hammer intended for attachment to a bracket or the like. The demolition hammer includes an adapter bracket which connects to the arm of a backhoe in place of the conventional bucket of the backhoe, and a hammer head spaced apart from the adapter bracket by a hammer spring arm cantilevered or pivotably mounted with respect to the adapter bracket. Repeated operation of the backhoe hydraulic cylinder which normally pivots the bucket will instead move the hammer into repetitive impacts with the concrete or other work surface undergoing demolition. The flexibility of the hammer spring adds a whipping action which increases the effective impact of such movement.