Patent ID: 7198451
Filing Date: 2007-04-03
Classification: E02F

Abstract:
1. A quick-change coupling for attaching work tools to an excavator boom, comprising: a first coupling body part disposable on the work tool and a second coupling body part disposable on the excavator boom, said first and second coupling body parts being mutually securable by a hook connection and a wedge lock with common bearing surfaces formed on said first and second coupling body parts, respectively, and being substantially in contact when said first and second body parts are coupled to one another, and said first coupling body part having formed therein a recess for the hook connection and a recess for the wedge connection; and said first coupling body part including at least two coupling plates respectively disposable on the work tool parallel to and laterally on both sides of a longitudinal center plane of the work tool, said coupling plates being formed with mutually congruent recesses for the hook connection, recesses for the wedge connection, and said bearing surfaces of said first coupling body part formed in said recesses for the wedge connection and configured to bear against said bearing surfaces of said second coupling body part when said wedge lock is being closed so that the work tool can be attached to the excavator boom.