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:
May. 15, 1990
Filed:
Jun. 19, 1989
Applicant:
Inventor:
David A Ostergaard, Cedar Rapids, IA (US);
Assignee:
Cedarapids, Inc., Cedar Rapids, IA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B02C / ;
U.S. Cl.
CPC ...
241191 ; 144230 ; 2411 / ; 241294 ; 407 41 ; 407 49 ;
Abstract
The impeller bars on an 'open' type rotor of an impact crusher are clamped to each disc of the rotor by means of pairs of cooperating wedges. Each pair of wedges consists of a first wedge acting radially outwards of the rotor between the disc and the impeller bars and a second wedge acting axially of the rotor between the disc and the first wedge to drive the first wedge radially outwards. Means including a hook are also disclosed for lifting the impeller bars onto the rotor for initial installation as well as for later repositioning of the bars to compensate for wear.