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Two-flute twist drill

a twist drill and two-flute technology, applied in the field of twist drills, can solve the problems of high-specialized twist drills that only a professional machine shop can afford, high-specialized twist drills can be an unjustifiable expense, and high-specialized twist drills can be expensive in and of themselves

Inactive Publication Date: 2005-03-10
TG TOOLS UNITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such highly specialized twist drills can be expensive in and of themselves, and having a complete suite of twist drills for each material can present an expense that only a professional machine shop can afford.
For individual persons or small businesses, such highly specialized twist drills can be an unjustifiable expense.
In addition, twist drills that are made for “home” or non-professional use, that is, for drilling in typical materials as wood, drywall, plastic, rubber, non-ferrous metals (e.g., aluminum, copper), and thin ferrous plate (sheet steel), are typically configured to produce relatively long spiral or coiled chips, which can be bothersome as they tend to collect around the drilling site, and can interfere with the actual operation of the twist drill.

Method used

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  • Two-flute twist drill
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Examples

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Embodiment Construction

[0058] While this invention is susceptible of embodiment in many different forms, there is shown in the drawings and will be described in detail several specific embodiments, with the understanding that the present disclosure is to be considered an exemplification of the principles of the invention and is not intended to limit the invention to the embodiments illustrated.

[0059]FIGS. 1-2 illustrate a prior art general purpose twist drill 10, which may be formed from any suitable material, such as M50 steel, although other materials may be used. Twist drill 10 is shown, not only to provide an illustration of a representative general purpose bit, but also to provide visual reference for certain terms to be used herein, with reference to the twist drill construction of the present invention. Twist drill 10 may be used typically on materials such as brass, bronze, as well as hard plastics, drywall, fiberboard and the like, and such bits are often used by non-professional do-it-yourselfe...

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Abstract

A twist drill for use, predominantly by non-professional do-it-yourself workers incorporates a flute architecture with an internal ridge for promoting the break up of chips into short length components. The tip of the twist drill includes an axial relief construction for improved performance across a wide variety of materials, and a highly sloped face for prompting transport of chips away from the drill tip.

Description

BACKGROUND OF THE INVENTION [0001] 1. The Technical Field [0002] The present invention is directed to twist drills for use, primarily by non-professionals, for multiple material applications (wood, drywall, plastic, rubber, non-ferrous metals and thin ferrous plate or sheets). [0003] 2. The Prior Art [0004] For each type of material (wood, drywall, plastic, rubber, non-ferrous metals, ferrous metals, ceramics, glass), there exists a specific twist drill design which can be optimized for use with that particular material. However, such highly specialized twist drills can be expensive in and of themselves, and having a complete suite of twist drills for each material can present an expense that only a professional machine shop can afford. For individual persons or small businesses, such highly specialized twist drills can be an unjustifiable expense. [0005] In addition, twist drills that are made for “home” or non-professional use, that is, for drilling in typical materials as wood, d...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B23B51/00B23B51/02
CPCB23B51/02B23B2222/04B23B2222/21B23B2226/18B23B2226/45B23B2226/57Y10T408/899B23B2251/04B23B2251/18B23B2251/406B23B2251/44Y10T408/9097B23B2226/61
Inventor WANG, YUHONGZHANG, YING-HAO
Owner TG TOOLS UNITED
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