The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 06, 1998
Filed:
Jun. 16, 1997
Carl A Soczka, Milwaukee, WI (US);
Harnischfeger Corporation, Milwaukee, WI (US);
Abstract
Disclosed is a digging implement such as a mining shovel dipper which has a body, a movable door mounted with respect to the body and a mechanism for retarding swinging movement of the door. The mechanism includes first and second housings and plural retarding discs compressed between the housings. In the improvement, a resilient member is interposed between the first housing and the discs. And most preferably, a separate resilient member is interposed between each housing, respectively, and the discs. The thickness of each resilient member is selected in view of the aggregate thickness of the discs and the number of resilient members if more than one such member is used. A highly preferred resilient member is an elastomeric washer. The new retarding mechanism substantially extends the time period between mechanism adjustments and results in improved machine productivity.