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. 21, 1991
Filed:
Feb. 14, 1990
Roger E Carpenter, Clearcreek Township, Ashland County, OH (US);
McNeil (Ohio) Corporation, St. Paul, MN (US);
Abstract
A grinding assembly (10) for a grinder pump (13) has disk member (11) rotatable within an opposing annular ring (12). The inner circumferential surface (34) of the annular ring (12) carries a plurality of cutting teeth (41, 42), which partially extend at an angle along the lateral dimension of the inner circumferential surface (34). Disk member (11) has an annular edge (50) which separates a side (51) distal to the pump inlet (17) and a side (52) proximal to the inlet (17). At least one projection (60) extends from the distal side (51) and has a leading edge (63) facing toward the direction of normal shaft rotation. At least one cutting member (70) extends from the proximal side (52) and also has a leading edge (74). Proximal side (52) has a recess (80) forming first and second cutting edes (82, 84). Similarly, distal side (51) has a recess (90) having first and second cutting edges (93, 94). Proximal recess (80) overlaps distal recess (90) along the width of annular redge (50).