Invention Grant
- Patent Title: Cutter for maintaining edge sharpness
- Patent Title (中): 刀具用于保持锋利的锐度
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Application No.: US11365298Application Date: 2006-03-01
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Publication No.: US07861808B2Publication Date: 2011-01-04
- Inventor: Youhe Zhang , Yuelin Shen
- Applicant: Youhe Zhang , Yuelin Shen
- Applicant Address: US TX Houston
- Assignee: Smith International, Inc.
- Current Assignee: Smith International, Inc.
- Current Assignee Address: US TX Houston
- Main IPC: E21B10/58
- IPC: E21B10/58
Abstract:
A cutter comprising a base portion, an ultrahard layer disposed on said base portion, and at least one recessed region on an outer surface of the cutter. A start of the recessed region disposed a selected distance behind a cutting face.
Public/Granted literature
- US20060201712A1 Cutter for maintaining edge sharpness Public/Granted day:2006-09-14
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