Tine bit
OwnerVirgil E. Hedgepethinventor
Life of this patent
Estimating the term…
Abstract
A drill bit is provided which has a central tine and first and second cutting tines, provided one on each side of the central tine. The lowermost end of each of the cutting tines is sharpened for cutting the stock. Thus the drill bit cores the material to form a hole thereby reducing the amount of material that must be cutaway. Further, the cutting tines are formed so as to have an enlarged distal head so that the main body portion of each of the tines has a slightly smaller cross-section than the cutting head. In this manner, friction can be reduced between the edges of the tines and the edges of the material being worked. Even further, the tine bit includes cutting blades between the central tine and the cutting tines in the event the stock is thicker than the length of the cutting tines.
Claims15
A drill bit for drilling a bore in stock material comprising:
- an elongated main body member having a first, proximal end and a second, distal end;
- said distal end having a central tine element mounted thereto,
- said central tine element including a shaft portion having a longitudinal axis parallel to a longitudinal axis of said main body member and having a pointed distal end.
- said distal end of said central tine element having a maximum width greater than width of said shaft portion of said central tine element,
- said distal end of said main body member further having at least one cutting tine element mounted thereto,
- each said cutting tine element having a longitudinal axis parallel to the longitudinal axis of said central tine element and spaced therefrom,
- each of said cutting tines having a shaft portion and a sharpened distal end defining a cutting blade.
- said sharpened distal end of each said cutting tine element having a width greater than width of said shaft portion of said respective cutting tine element,
- said distal end of said main body member further including a cutting blade defined between said central tine element and each of said cutting tine elements.
A drill bit for drilling a bore in stock material comprising:
- an elongated main body member having a first, proximal end and a second, distal end;
- said distal end having a central tine element mounted thereto,
- said central tine element including a shaft portion having a longitudinal axis parallel to a longitudinal axis of said main body member and having a pointed distal end,
- said distal end of said central tine element having a maximum width greater than a width of said shaft portion of said central tine element,
- said distal end of said main body member further having at least one cutting tine element mounted thereto,
- each said cutting tine element having a longitudinal axis parallel to the longitudinal axis of said central tine element and spaced therefrom,
- each of said cutting tines having a shaft portion and a sharpened distal end defining a cutting blade, and
- further including a cutting blade defined on said distal end of said main body member between said central tine element and each said cutting tine element.
Dependencies are inferred from the claim text.