[특허]Twist drill

[미국특허] Twist drill 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B23B-051/02
출원번호	US-0605353 (1990-10-30)
우선권정보	JP-0315501 (1987-12-14); JP-0315502 (1987-12-14); JP-0319509 (1987-12-17); JP-0324589 (1987-12-22); JP-0180005 (1988-07-19); JP-0180494 (1988-07-20); JP-0183275 (1988-07-22); JP-0183277 (1988-07-22); JP-0184
발명자 / 주소	Imanaga Koujiro (Gifu JPX) Nakamura Shinichi (Gifu JPX) Hosono Hideji (Gifu JPX) Yanase Yoshiyuki (Gifu JPX)
출원인 / 주소	Mitsubishi Materials Corporation (Tokyo JPX 03)
인용정보	피인용 횟수 : 27 인용 특허 : 0

초록 ▼

A twist drill includes a cylindrical body having an axis of rotation therethrough and having a forward end which contacts a workpiece. The body has a spiral flute formed in an outer peripheral surface thereof so as to extend spirally along a length thereof to the forward end and a land disposed adjacent to the flute. The flute has a first wall facing in the direction of rotation of the body and a second wall extending from an inner end of the first wall to the outer periphery of the body. The first wall terminates at the forward end in a first cutting lip having a radially outermost end disposed on the outer periphery of the body. The second wall is concavely shaped when viewed from the forward end and formed so that, assuming a first line extending from the outermost end perpendicular to a second line which connects the outermost end and the axis of the body, the maximum distance between the first line and the second wall is set to range between 0.45D and 0.65D, wherein D is a diameter of the body.

대표청구항 ▼

A twist drill comprising: a cylindrical body including: an axis of rotation longitudinally therethrough; a forward end which contacts a workpiece; a web thickness of 0.2 D to 0.35 D, D being a diameter of said body; and a spiral flute formed in an outer peripheral surface of said body so as to extend spirally along a longitudinal length thereof to said forward end and a land disposed adjacent to said flute, said flute having: a first wall facing in a direction of rotation of said body and a second wall extending from an inner end of said first wall to the outer periphery of said body, said first wall terminating at said forward end in a first cutting lip having a radially outermost end disposed on the outer periphery of said body, said second wall being concavely shaped when viewed from said forward end formed so that, assuming a first line extending from said outermost end perpendicular to a second line connecting said outermost end and said axis of said body, the maximum distance between said first line and said second wall being set in a range between from 0.45 D to 0.65 D, the ratio of arc length of said flute to arc length of said land at a cross-section taken perpendicular to the axis of said body being 0.9 to 1.2, the wall of said flute having an arcuately shaped portion which contacts an imaginary cylinder inscribing a web portion of the drill, and said arcuately shaped portion, at a cross-section taken perpendicular to the axis of said body, having a radius of curvature of between 0.15 D and 0.2 D.

이 특허를 인용한 특허 (27) 인용/피인용 타임라인 분석

Quinn, Thomas J.; Johnson, David N.; Probst, Florian, Chisels.
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Quinn, Thomas J.; Johnson, David N.; Probst, Florian, Chisels.
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Kuroda, Masahiko; Nakazono, Yoji, Drill.
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Naruke, Koichiro; Takahashi, Sohei, Drill.
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Olsson, Håkan, Drill.
상세보기
Santamarina, Aland; Johnson, David N., Drill bit.
상세보기
Santamarina, Aland; Johnson, David N., Drill bit.
상세보기
Santamarina, Aland; Steinbrunner, Glen V.; Johnson, David N., Drill bit.
상세보기
Lindblom,Stefan, Drill for chip removing machining.
상세보기
Meece, Roy D.; Baird, Jr., James A.; Geverdt, Gerald R., Drill having machine grindable cutting edge.
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Krenzer, Ulrich F.; Kauper, Herbert R., Drilling tool.
상세보기
Frisendahl,J？rgen, Drilling tool for holemaking in metallic workpieces.
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McSpadden John T., Endodontic dental instrument.
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McSpadden John T., Endodontic dental instrument.
상세보기
McSpadden John T., Endodontic instrument.
상세보기
McSpadden John T., Endodontic instrument.
상세보기
John T. McSpadden ; Tim L. Taylor, Endodontic instrument having a chisel tip.
상세보기
Taylor Tim L. ; McSpadden John T., Endodontic instrument having enhanced compliance at the tip.
상세보기
Thomas, Rickey J.; Probst, Florian; Quinn, Thomas J.; Joshi, Abhijeet P.; Wetzl, Alfons K.; Leidl, Albert; Johnson, David N., Metal cutting drill bit.
상세보기
Thomas Rickey J., Self-centering drill bit with pilot tip, and process.
상세보기
Thomas Rickey J., Self-centering drill bit with pilot tip, and process.
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Britzke Robert W. (Rogers AR) Eason Jimmy (Rogers AR) Fang Zhigang (The Woodlands TX), Surface decarburization of a drill bit.
상세보기
Britzke Robert W. (Rogers AR) Eason Jimmy (Rogers AR) Fang Zhigang (The Woodlands TX), Surface decarburization of a drill bit having a refined primary cutting edge.
상세보기
Mühlfriedel, Dieter; Borschert, Bernhard; Schwägerl, Jürgen, Twist drill and method for producing a twist drill which method includes forming a flute of a twist drill.
상세보기
M？hlfriedel,Dieter; Borschert,Bernhard; Schw？gerl,J？rgen, Twist drill and method for producing a twist drill which method includes forming a flute of a twist drill.
상세보기
George, Stephen Michael, Twist drill with negative axial rake transition between the lip and the secondary cutting edge.
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Wang, Yuhong; Zhang, Ying Hao, Two-flute twist drill.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Twist drill 원문보기