Twist drill
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 12, 1988
Grant Date -
N/A
app pub date -
Nov 26, 1986
filing date -
Nov 26, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A twist drill including a body characterized by the outer portion of each of the heels bulging toward the main flute as compared with that of the standard twist drill, the main lips each bulging in a triangular shape in cross section toward the main flute as compared with that of the standard twist drill, and a subflute having a substantially U-shaped cross section and axially formed in the inner portion adjacent to the axis of the twist drill of each of the heels along the main flute for a predetermined distance from the tip.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully