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:
Jan. 16, 1990
Filed:
Dec. 16, 1988
Alan H Lonn, Edelstein, IL (US);
Gene R Klett, Washington, IL (US);
Caterpillar Inc., Peoria, IL (US);
Abstract
Ground engaging bits having hardned tips are beneficial when working extremely hard ground and/or planing asphalt or concreate. In these applications, the ground engaging bits rotate in their holders while performing the cutting action. Since the material needed to make a hardened tip is normally very expensive, it is beneficial to best utilize all, or at least most of, the hardened tip and to provide a hardened top that remains sharp during its effective life. The present ground engaging bit has a body with a convex non-linear forward end surface and a hardened tip with a corresponding concave non-linear rearward end surface to mate with the forward end surface of the body. The hardened tip has a continuous concave surface of revolution defined on its intermediate portion with a radius thereof being less than the diameter of its rearward flange portion. This arrangement uses less material to form the hardened tip and also provides a bonded surface that during the brazing operation allows the brazing material to freely flow evenly over the interface between the two surfaces. This arrangement provides an effective ground engaging bit that remains sharp during the life of the ground engaging bit while using less material to make the hardened tip.