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:
Nov. 12, 1996
Filed:
Nov. 21, 1994
John Shipley, Selah, WA (US);
Other;
Abstract
An apparatus for pulverizing hard surfaces, the apparatus having multiple sets of elongated, curvilinear shearing blades. The shearing blades are helically mounted about a rotational shaft, adjacent sets of shearing blades mounted at an inverse pitch angle. The mounting orientation allows layers of the substance to be pulverized to be sheared off a compacted surface, then rotated about the rotational shaft, while also being move back and forth along the longitudinal axis of the rotational shaft, leading to more complete pulverization. The shearing blades are mounted intermediate their edges to the rotational shaft by support members, and at a rake angle relative to the surface for ensuring efficient operation. The total arc length of the blades is at least 360.degree.and the trailing edges of the blades are turned outward to prevent bucking. The arrangement of the blades also causes the apparatus to pull itself into the surface to be pulverized to ease operation. The blades are removably mounted.