Patent
   D357486
Priority
Feb 24 1993
Filed
Aug 18 1993
Issued
Apr 18 1995
Expiry
Apr 18 2009
Assg.orig
Entity
unknown
4
17
n/a
The ornamental design for an insert for rock drilling bits, as shown and described.

FIG. 1 is a bottom view of an insert for rock drilling bits showing our new design;

FIG. 2 is a right side view thereof;

FIG. 3 is a left side view thereof; and,

FIG. 4 is a top view thereof showing the cutting tip.

The other two sides are not shown as they are identical to the right and left sides as shown.

Brolund, Stig-Åke, Strand, Goran, Mattsson, Michael

Patent Priority Assignee Title
11655681, Dec 06 2018 Halliburton Energy Services, Inc.; Halliburton Energy Services, Inc Inner cutter for drilling
D371146, Oct 12 1994 Sandvik Intellectual Property Aktiebolag Asymmetrical button insert for rock drilling
D371374, Apr 12 1995 Sandvik Intellectual Property Aktiebolag Asymmetrical button insert for rock drilling
D911399, Dec 06 2018 Halliburton Energy Services, Inc.; Halliburton Energy Services, Inc Innermost cutter for a fixed-cutter drill bit
Patent Priority Assignee Title
3442342,
3858670,
4021084, Feb 04 1975 Drilling bit bearing structure
4108260, Apr 01 1977 Hughes Tool Company Rock bit with specially shaped inserts
4150728, Nov 26 1976 Smith International, Inc. Rock drill bit inserts with hollow bases
4185708, Aug 31 1976 Akademia Gorniczo-Hunicza im, Stanislawa Staszica Bit for drilling holes in rocks
4254840, Oct 05 1978 Reed Tool Company Drill bit insert
4334586, Jun 05 1980 Reed Rock Bit Company Inserts for drilling bits
4593776, Oct 24 1983 Smith International, Inc. Rock bits having metallurgically bonded cutter inserts
4716976, Oct 28 1986 KENNAMETAL PC INC Rotary percussion drill bit
4756373, Dec 23 1986 SANDVIK ROCK TOOLS, INC Rock drilling bit and a method of producing the same
4776413, Sep 02 1985 Santrade Limited Button insert for rock drill bits
4781770, Mar 24 1986 Smith International, Inc. Process for laser hardfacing drill bit cones having hard cutter inserts
4823893, Jul 17 1987 Ingersoll-Rand Company Metal insert mounting
4867015, Dec 23 1986 Sandvik Rock Tools, Inc. Rock drilling bit and a method of producing the same
5264283, Oct 11 1990 Sandvik Intellectual Property Aktiebolag Diamond tools for rock drilling, metal cutting and wear part applications
30678,
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Executed onAssignorAssigneeConveyanceFrameReelDoc
Aug 18 1993Sandvik AB(assignment on the face of the patent)
Sep 21 1993MATTSSON, MICHAELSandvik ABASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0067950646 pdf
Sep 21 1993STRAND, GORANSandvik ABASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0067950646 pdf
Sep 22 1993BROLUND, STIG AKESandvik ABASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0067950646 pdf
May 16 2005Sandvik ABSANDVIK INTELLECTUAL PROPERTY HBASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0162900628 pdf
Jun 30 2005SANDVIK INTELLECTUAL PROPERTY HBSandvik Intellectual Property AktiebolagASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0166210366 pdf
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