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:
Feb. 28, 1989
Filed:
Aug. 11, 1986
Theodore F Gundlach, Belleville, IL (US);
T.J. Gundlach Machine Company, Belleville, IL (US);
Abstract
A coal crusher roll includes a smooth tubular cylindrical back-up roll having a series of regularly spaced tapped radial holes to receive bolts by which eight identical shell segments may be fastened on the back-up roll. The holes at the axial ends of the segments are undercut to provide a rabbet into which fits the tang of a special lifting hook by which the segment can be easily handled by a lightweight crane. A recess in the central part of the segment defined by a peripheral berm around the backside of the segment reduces the weight of the segment, provides a place for receiving balancing weights, and simplifies the face fit machining for the segment with the back-up roll.