Industrial and roadway identification and floor surface treatment system, and diamond surface drill bit for use in installing the system

• US 5,252,009 A
• Filed: 09/03/1992
• Issued: 10/12/1993
• Est. Priority Date: 01/22/1991
• Status: Expired due to Fees

• Current Assignee: Joseph Bossler
• Original Assignee: Joseph Bossler
• Inventors: Bossler, Joseph
• Primary Examiner(s): Bishop, Steven C.
• Application Number:
  US07/940,338
• Time in Patent Office: 404 Days
• Field of Search: 408/145, 408/199, 408/227, 408/201, 408/202, 408/209, 175/327, 175/386, 175/387, 175/404
• US Class Current: 408/145
• CPC Class Codes: B28D 1/18 by milling, e.g. channelling by means of milling tools
• CPC Class Codes: B28D 1/186 Tools therefor, e.g. having exchangeable cutter bits B28D1/181 takes precedence; bits for picks or pick-holders for mining or quarrying E21C35/18
• CPC Class Codes: E01C 23/0946 specially for forming recesses to receive marking materials or markers, e.g. cutters for milling traffic line channels, core drills for button-setting other tools E01C23/0993
• CPC Class Codes: E01F 9/553 Low discrete bodies, e.g. marking blocks, studs or flexible vehicle-striking members
• CPC Class Codes: Y10T 408/81 Tool having crystalline cutting edge
• CPC Class Codes: Y10T 408/8923 Removable central lead
• CPC Class Codes: Y10T 408/8925 Depth-limiting member
• CPC Class Codes: Y10T 408/909 Having peripherally spaced cutting edges

Abstract

Disclosed are methods for applying durable markings to wearing surfaces, such as concrete factory floors, roadways, terrazzo or ceramic tile floors, or for imparting particular floor surface qualities, such as providing a non-skid surface. A diamond surface drill bit rotating at, for example, 2500 to 5000 rpm is employed to form dry recesses in the surface, which recess is immediately receptive to adhesive for attaching a premolded insert, or to an insert formed in situ, such as an insert of an acrylic polymer. The disclosed surface drill bit has a cutting end with two general types of diamond-impregnated cutting element segments attached. Attached around the periphery of the cutting end are peripheral gauge cutting element segments of arcuate configuration spaced from each other. Also attached to the cutting end are a plurality of inside cutting elements arranged in a generally radially extending pattern, starting from within the spaces between the peripheral gauge cutting element segments, and extending radially inwardly. The inside cutting element segments serve the dual purposes of cutting away areas of the surface within the peripheral extent, and serving as air vanes to promote airflow for cooling and carrying away debris. To maintain the lateral position of the drill bit during operation, either a small core drill centered in the cutting end or a pin engaging a pre-drilled hole in the masonry surface is provided. The drill bit may be assembled in various ways to suit a variety of specific on-site conditions.

Claims

1. A rotary surface drill bit for forming a dry recess in a wearing surface, said drill bit comprising:

a base member including a rear portion having means for attachment to a rotary driver, and a generally planar forward portion having a circular periphery;

axially extending pilot means centered within said planar forward portion for engaging the surface to maintain the lateral position of said drill bit during operation;

a plurality of diamond-impregnated peripheral gauge cutting element segments of arcuate configuration attached to said planar forward portion generally around the periphery thereof and spaced from each other so as to define a discontinuous circle with circumferential spaces between peripheral gauge cutting element segments; and

a plurality of diamond-impregnated inside cutting element segments of vane-like configuration attached to said planar forward portion and arranged in a generally radially extending pattern such that all areas of the surface within the peripheral extent of said drill bit at least up to said pilot means are cut away as said drill bit rotates during operation, and said inside cutting element segments promote airflow in a radially outward direction for cooling;

said peripheral gauge cutting element segments and said inside cutting element segments having generally flat cutting surfaces lying in a common plane.

2. A rotary surface drill bit in accordance with claim 1, wherein said pilot means comprises a core drill bit.

3. A rotary surface drill bit in accordance with claim 1, wherein said pilot means comprises a pilot pin for engaging a pre-drilled hole in the masonry surface.

4. A rotary surface drill bit in accordance with claim 1, wherein said base member and said means for attachment include passageways whereby air may be injected to reach said cutting element segments.

5. A rotary surface drill bit in accordance with claim 1, which further comprises an outside ring secured to said base member and positioned so as to contact the surface when the recess reaches the desired depth.

6. A rotary surface drill bit for forming a dry recess in a wearing surface, said drill bit comprising:

a base member including a rear portion having means for attachment to a rotary driver, and a generally planar forward portion having a circular periphery;

axially extending pilot means centered within said planar forward portion for engaging the surface to maintain the lateral position of said drill bit during operation;

a plurality of diamond-impregnated peripheral gauge cutting element segments of arcuate configuration attached to said planar forward portion generally around the periphery thereof and spaced from each other so as to define a discontinuous circle with circumferential spaces between peripheral gauge cutting element segments; and

a plurality of diamond-impregnated inside cutting element segments of vane-like configuration attached to said planar forward portion and arranged in a generally radially extending pattern such that all areas of the surface within the peripheral extent of said drill bit at least up to said pilot means are cut away as said drill bit rotates during operation, and said inside cutting element segments promote airflow for cooling, at least some of said inside cutting element segments having ends within the circumferential spaces between said peripheral gauge cutting element segments.

7. A rotary surface drill bit in accordance with claim 6, wherein others of said inside cutting element segments are angularly spaced from and partially radially overlap said at least some of said inside cutting element segments.

8. A rotary surface drill bit for forming a dry recess in a wearing surface, said drill bit comprising:

a base member including a rear portion having means for attachment to a rotary driver, and a generally planar forward portion having a circular periphery;

axially extending pilot means centered within said planar forward portion for engaging the surface to maintain the lateral position of said drill bit during operation;

a plurality of diamond-impregnated peripheral gauge cutting element segments of arcuate configuration attached to said planar forward portion generally around the periphery thereof and spaced from each other so as to define a discontinuous circle with circumferential spaces between peripheral gauge cutting element segments; and

a plurality of diamond-impregnated inside cutting element segments of vane-like configuration identical in size and configuration to said peripheral gauge cutting element segments attached to said planar forward portion and arranged in a generally radially extending pattern such that all areas of the surface within the peripheral extent of said drill bit at least up to said pilot means are cut away as said drill bit rotates during operation, and said inside cutting element segments promote airflow for cooling.

9. A rotary surface drill bit for forming a dry recess in a wearing surface, said drill bit comprising:

a base member including a rear portion having means for attachment to a rotary driver, and a generally planar forward portion having a circular periphery;

axially extending pilot means centered within said planar forward portion for engaging the surface to maintain the lateral position of said drill bit during operation;

a plurality of diamond-impregnated peripheral gauge cutting element segments of arcuate configuration attached to said planar forward portion generally around the periphery thereof and spaced from each other so as to define a discontinuous circle with circumferential spaces between peripheral gauge cutting element segments;

a plurality of diamond-impregnated inside cutting element segments of vane-like configuration attached to said planar forward portion and arranged in a generally radially extending pattern such that all areas of the surface within the peripheral extent of said drill bit at least up to said pilot means are cut away as said drill bit rotates during operation, and said inside cutting element segments promote airflow for cooling;

said means for attachment to a rotary driver comprising;

a threaded axial bore extending through said base member perpendicular to said generally planar forward portion, and

a shank element threaded at one end for engagement with said threaded axial bore from said rear portion of said base member, and configured at its other end for attachment to the rotary driver, said shank element in use being threadably assembled to an intermediate position within said threaded axial bore such that said other end extends axially outwardly from said rear portion; and

said pilot means in use being assembled within said threaded axial bore such that one end of said pilot means abuts the threaded end of said shank element within said threaded axial bore and the other end of said pilot means extends axially outwardly from said forward portion.