Source: https://patents.google.com/patent/US5069584?oq=6%2C064%2C942
Timestamp: 2018-04-24 19:10:53
Document Index: 715981849

Matched Legal Cases: ['art 1', 'art 3', 'art 1', 'art 1', 'art 1', 'art 1']

US5069584A - Hollow drilling tool - Google Patents
Hollow drilling tool Download PDF
US5069584A
US5069584A US07468375 US46837590A US5069584A US 5069584 A US5069584 A US 5069584A US 07468375 US07468375 US 07468375 US 46837590 A US46837590 A US 46837590A US 5069584 A US5069584 A US 5069584A
US07468375
Horst-Detlef Gassmann
A hollow drilling tool is made up of an axially extending tubular carrier part, a cutting body at one end of the carrier part, and guide elements located in the axial direction of the carrier part between the cutting body and the carrier part. The radially outer surface of each guide element is in alignment in the axial direction of the carrier part with the radially outer surface of the cutting body. The guide elements guide the hollow drilling tool in a borehole formed by the cutting body.
The present invention is directed to a hollow drilling tool formed of a tubular carrier part with cutting bodies arranged at its front or leading end.
Therefore, the primary object of the present invention is to provide a hollow drilling tool affording complete utilization of the cutting bodies, and, at the same time, making it possible to maintain accurate borehole geometry.
In FIGS. 1 and 2, a hollow drilling tool is illustrated, having a leading end at the lower end and a trailing end at the upper end. Extending from the trailing end toward the leading end is a tubular carrier part 1 with a cutting body 2 located at the leading end and extending toward the trailing end with an annular carrier part 3 located between them. The carrier part 1, has a leading end la and a trailing end 1b forming the trailing end of the tool. Carrier part 1 has a connection fitting 1c at its trailing end 1b. Cutting body 2 has a leading end 2a at the leading end of the tool and a trailing end 2b. Further, the cutting body 2 has two slots 2c extending from its leading end 2a toward its trailing end with the slots arranged diametrically opposite one another and terminating intermediate the ends of the cutting body. Slots 2c serve for the passage of coolant water, fed through the carrier part 1, from the inside to the outside of the hollow drilling tool. The carrier 3 has a leading end 3a and a trailing end 3b. The leading end 3a of the carrier is connected with the trailing end 2b of the cutting body. Carrier 3 has grooves 3c in its radially outer surface extending in the axial direction and also around a portion of its circumference. These grooves 3c serve for the drainage of coolant water and of the drillings or drilled material rinsed away by the water. The grooves 3c are separated by webs which serve for guidance of the tool and are constructed as segments 3d. At its trailing end 3b, the carrier 3 is connected with the leading end 1a of the carrier part. The connection of the carrier part 1 with the carrier 3 can be effected by means of welding or soldering. In addition, the connection between the cutting body 2 and the carrier 3 can also be effected by welding or soldering. Moreover, it is possible to sinter together the cutting body 2 and the carrier 3. The axial extent of the carrier 3 amounts to a multiple of the axial extent s of the cutting body 2.
1. Hollow drilling tool comprising an axially extending tubular carrier part (1, 11, 21, 31) with a circumferentially extending radially outer surface having a first end (1a, 11a, 21a, 31a) and a second end, at least one cutting body (2, 12, 22, 32), said at least one cutting body having a first end and a second end spaced apart in the axial direction, and a radially outer surface and a radially inner surface, wherein the improvement comprises said at least one cutting body is formed of a material different from that of said carrier part, said radially outer surface of said at least one cutting body has a greater diameter than the radially outer surface of said carrier part so that said at least one cutting body projects radially outwardly beyond said carrier part, guide elements extending in the axial and circumferential direction of said carrier part and extending in the axial direction from contact with said at least one cutting body to contact with said carrier part, said guide elements having a radially outer surface aligned in the axial direction of said carrier part with the radially outer surface of said at least one cutting body for at least a part of the circumferential extent thereof so that the radially outer surface of said guide elements projects radially outwardly from said carrier part, said guide elements having a greater resistance to wear than said carrier part, and said guide elements having an axial extent (1, m, n, t) corresponding at least to the axial extent (s) of said at least one cutting body (2, 12, 22, 32), said guide elements are formed as segments disposed in spaced relation in the circumferential direction with at least three said segments (3d, 13, 23, 33) disposed in spaced relation around the circumference, adjacent said segments defining axial extending sides of grooves extending axially from the at least one cutting body and extending radially inwardly from the radially outer surface of said guide element, said guide elements are formed of a material different from said carrier part and said at least one cutting body, and said segments each have a first end and a second end with the segment first end contacting the second ends of one of the at least one cutting body and the segment second ends contacting the carrier part, and said grooves being coextensive with said segments.
US07468375 1989-01-20 1990-01-22 Hollow drilling tool Expired - Lifetime US5069584A (en)
DE19893901528 DE3901528A1 (en) 1989-01-20 1989-01-20 Hollow drill bit
DE3901528 1989-01-20
US5069584A true US5069584A (en) 1991-12-03
ID=6372415
US07468375 Expired - Lifetime US5069584A (en) 1989-01-20 1990-01-22 Hollow drilling tool
US (1) US5069584A (en)
EP (1) EP0378964B1 (en)
JP (1) JPH02224978A (en)
CA (1) CA2008169C (en)
DE (1) DE3901528A1 (en)
DE19926247A1 (en) * 1999-06-09 2000-12-21 Krauss Maffei Wegmann Gmbh & C Diamond crown drill for compound workpiece materials has an open channel for flushing and cooling flows to prevent friction heat which damages softer material layers and automatic ejection of the drilled core
EP1304199A1 (en) * 2001-10-18 2003-04-23 Marcrist International Limited Core drills with wear protection
US20040197156A1 (en) * 2001-07-27 2004-10-07 Schraml Horst Karl Diamond hollow drill
US6935325B1 (en) * 2002-11-01 2005-08-30 Lawrence L. Getty Method and apparatus for cutting and polishing stone articles
US20070131456A1 (en) * 2005-01-18 2007-06-14 Paul-Philippe Lapointe Bit for drilling a hole
US20090304468A1 (en) * 2005-10-24 2009-12-10 Paul Edward Duggan Drill Bit
DE102007005463B3 (en) * 2007-01-30 2008-05-29 Ting Fong Electric & Machinery Co. Ltd., Sanchung Process to manufacture a drill/milling tool with forged cylinder and sintered cutter ring joined by keyways
EP2745965A1 (en) * 2012-12-21 2014-06-25 HILTI Aktiengesellschaft Annular drill bit with a replaceable cutting section
DE102014007958A1 (en) * 2014-06-04 2015-12-17 Vittorio Pittana Device and method for reduction of the necessary driving power for core drilling
GB2052325A (en) * 1979-07-03 1981-01-28 Stark T Multi-cutter drilling bit tool
DE694502C (en) * 1938-10-05 1940-08-02 Walter Hebart Of a drill pipe and drill bit attached existing drilling tool, particularly for the production of long holes
CA1053938A (en) * 1977-11-18 1979-05-08 Robert E. Generoux Drill bit
Longyear Advertisement, 1957. *
DE19926247B4 (en) * 1999-06-09 2005-08-04 Krauss-Maffei Wegmann Gmbh & Co. Kg Diamond core drill
US8191545B2 (en) * 2002-02-22 2012-06-05 Kim & Ed Pte Ltd Electroformed thin-wall core drills impregnated with abrasives
CA2008169C (en) 2000-01-04 grant
EP0378964A2 (en) 1990-07-25 application
CA2008169A1 (en) 1990-07-20 application
EP0378964B1 (en) 1993-07-28 grant
DE3901528A1 (en) 1990-07-26 application
JPH02224978A (en) 1990-09-06 application
EP0378964A3 (en) 1990-09-26 application
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:OBERMEIER, JOSEF;MAGYARI, EUGEN;RITT, WALTER;AND OTHERS;REEL/FRAME:005263/0922