Boring or penetrating the earth – With tool shaft detail – Helix or helically arranged structure
Reexamination Certificate
2006-11-21
2006-11-21
Tsay, Frank S. (Department: 3672)
Boring or penetrating the earth
With tool shaft detail
Helix or helically arranged structure
C175S420100
Reexamination Certificate
active
07137461
ABSTRACT:
A masonry or rock drilling tool suitable for use with a rotary hammer has a drilling head (4, 104) at a forward end of the tool. A forwardly extending cutting plate (6, 106) is fitted or formed on the drilling head (4, 104). First and second opposing axially extending channels (36, 38, 136, 138) are formed on the circumferential periphery of the drilling head. The tool has a clamping shank (2, 102) at a rearward end of the tool suitable for fitment within a tool holder of a rotary hammer. An intermediate helical conveying portion (10, 110) extends between the drilling head and the clamping shank. The intermediate helical conveying portion has at least four helically extending flutes (14a–d, 114a–d) separated by corresponding helically extending webs (12a–d,112a–d). The first of the axially extending channels extend axially rearwardly from a forward facing face of the drilling head into two of the four flutes. The second of the axially extending channels extend axially rearwardly from the forward facing face of the drilling head into the other two of the four flutes. Conveying properties of the tool are substantially enhanced by having each axially extending channel leading into two of the four flutes.
REFERENCES:
patent: 2370706 (1945-03-01), Andreasson
patent: 4549616 (1985-10-01), Rumpp et al.
patent: 4579180 (1986-04-01), Peetz et al.
patent: 4787464 (1988-11-01), Ojanen
patent: 4932815 (1990-06-01), Krauss
patent: 4967855 (1990-11-01), Moser
patent: 5265688 (1993-11-01), Rumpp et al.
patent: 5487434 (1996-01-01), Obermeier
patent: 5492187 (1996-02-01), Neukirchen et al.
patent: 5553682 (1996-09-01), Batliner et al.
patent: 5893688 (1999-04-01), Wiker et al.
patent: 6032749 (2000-03-01), Bongers-Ambrosius et al.
patent: 6129162 (2000-10-01), Hauptmann
patent: 6250857 (2001-06-01), Kersten
patent: 6427789 (2002-08-01), Fuss et al.
patent: 6702047 (2004-03-01), Huber
patent: 6742610 (2004-06-01), Peetz
patent: 803291 (1951-04-01), None
patent: 1 608 358 (1970-12-01), None
patent: 2 057 892 (1972-06-01), None
patent: 2 159 728 (1973-06-01), None
patent: 71 33 712 (1973-11-01), None
patent: 23 58 447 (1975-03-01), None
patent: 80 10 468 (1981-12-01), None
patent: 195 37 900 (1997-04-01), None
patent: 197 03 994 (1998-08-01), None
patent: 19727070 (1999-01-01), None
patent: 19753731 (1999-06-01), None
patent: 198 59 885 (1999-11-01), None
patent: 200 21 710 (2001-04-01), None
patent: 201 00 085 (2001-05-01), None
patent: 0 088 037 (1983-09-01), None
patent: 0 126 409 (1984-05-01), None
patent: 0 363 734 (1989-09-01), None
patent: 0 654 580 (1994-09-01), None
patent: 0 655 547 (1994-09-01), None
patent: 0 657 617 (1994-10-01), None
patent: 0 657 617 (1996-01-01), None
patent: 183005 (1922-07-01), None
patent: 1 362 292 (1974-08-01), None
patent: 1 432 546 (1976-04-01), None
patent: 1579332 (1980-11-01), None
patent: 63-89211 (1988-04-01), None
patent: WO 99/29998 (1999-06-01), None
patent: WO 200166899 (2001-09-01), None
Black & Decker Inc.
Harness & Dickey & Pierce P.L.C.
Tsay Frank S.
LandOfFree
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