US5154245A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diamond rock tools for percussive and rotary crushing rock drilling
Assignee: Sandvik AB
•
Filing: 1990-04-19
•
Granted: 1992-10-13
•
Expires: 2010-04-19
Abstract
Abstract The present invention relates to a rock bit button of cemented carbide for percussive or rotary crushing rock drilling. The button is provided with one or more bodies of polycrystalline diamond in the surface produced at high pressure and high temperature in the diamond stable area. Each diamond body is completely surrounded by cemented carbide except the top surface.
Inventors
- 👤 Mats G. Waldenstrom
- 👤 Udo K. R. Fischer
- 👤 Lars H. Hillert
- 👤 Mahlon D. Dennis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:44
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/56; E21B10/567; E21B10/5676
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
49 words
Cemented carbide rock bit button for percussive and rotary crushing rock drilling provided with at least one polycrystalline diamond body produced at high temperature and pressure, the diamond being compressively prestressed and being disposed within the cemented carbide button and surrounded by cemented carbide except for its top surface.
Claim 2
Dependent Claim
49 words
Cemented carbide rock bit button for percussive and rotary crushing rock drilling provided with at least one polycrystalline diamond body produced at high temperature and pressure, the diamond being compressively prestressed and being disposed within the cemented carbide button and surrounded by cemented carbide except for its top surface.
Claim 3
Dependent Claim
31 words
Rock bit button according to claim 1 provided with one concentric polycrystalline diamond body on top of the button with a surface length of 10-50% of the diameter of the button.
Claim 4
Dependent Claim
21 words
Rock bit button according to claim 1 provided with 2-5 polycrystalline bodies covering 10-50% of the surface area of the button.
Claim 5
Dependent Claim
33 words
Cemented carbide rock bit button of claim 1 for percussive and rotary crushing rock drilling provided with at least one polycrystalline diamond body in which the cemented carbide has an eta-phase containing core.
Claim 6
Dependent Claim
23 words
Rock bit button according to claim 1 in which each polycrystalline diamond body has a surface body that is greater than 1 mm.
Claim 7
Dependent Claim
20 words
Rock bit button according to claim 5 wherein each polycrystalline diamond body has a surface length of from 2-10 mm.
Claim 8
Dependent Claim
23 words
Rock bit button according to claim 1 wherein each polycrystalline diamond body has a height above the surface level greater than 0.5 mm.
Claim 9
Dependent Claim
23 words
Rock bit button according to claim 7 wherein the height of each said polycrystalline diamond body above the surface is from 1-5 mm.
Claim 10
Dependent Claim
17 words
Rock bit button according to claim 1 wherein said button is a diameter of from 5-30 mm.
Claim 11
Dependent Claim
19 words
Rock bit button according to claim 9 wherein the diameter of the rock bit button is from 7-15 mm.
Claim 12
Dependent Claim
17 words
Rock bit button according to claim 1 wherein said button contains less than 15 polycrystalline diamond bodies.
Claim 13
Dependent Claim
15 words
Rock bit button according to claim 11 wherein said button contains from 2-5 diamond bodies.
Claim 14
Dependent Claim
29 words
Rock bit button according to claim 1 wherein said button contains more than one polycrystalline diamond body and the separation distance between adjacent bodies is at least 1 mm.
Claim 15
Dependent Claim
20 words
Rock bit button according to claim 13 wherein the separation distance between adjacent polycrystalline diamond bodies is from 1-3 mm.
Claim 16
Dependent Claim
29 words
Rock bit button according to claim 12 wherein the diamond bodies are located symmetrically on the face of the button with respect to the longitudinal axis of the button.
Claim 17
Dependent Claim
29 words
Rock bit button according to claim 12 wherein the diamond bodies are located asymmetrically on the face of the button with respect to the longitudinal axis of the button.
Claim 18
Dependent Claim
31 words
Rock bit button according to claim 4 provided with one concentric polycrystalline diamond body on top of the button with a surface length of 10-50% of the diameter of the button.
Claim 19
Dependent Claim
23 words
Rock bit button according to claim 17 in which each polycrystalline diamond body has a surface body that is greater than 1 mm.
Claim 20
Dependent Claim
23 words
Rock bit button according to claim 18 wherein each polycrystalline diamond body has a height above the surface level greater than 0.5 mm.
Claim 21
Dependent Claim
17 words
Rock bit button according to claim 4 wherein said button is a diameter of from 5-30 mm.
Claim 22
Dependent Claim
17 words
Rock bit button according to claim 4 wherein said button contains less than 15 polycrystalline diamond bodies.
Claim 23
Dependent Claim
29 words
Rock bit button according to claim 4 wherein said button contains more than one polycrystalline diamond body and the separation distance between adjacent bodies is at least 1 mm.
Claim 24
Dependent Claim
29 words
Rock bit button according to claim 22 wherein the diamond bodies are located symmetrically on the face of the button with respect to the longitudinal axis of the button.
Claim 25
Dependent Claim
29 words
Rock bit button according to claim 22 wherein the diamond bodies are located asymmetrically on the face of the button with respect to the longitudinal axis of the button.
Claim 26
Dependent Claim
13 words
Rock bit button according to claim 4 wherein the diamond is compressively prestressed.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-10-13 | 1996-04-13 | 1996-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-13 | 2000-04-13 | 2000-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-13 | 2004-04-13 | 2004-10-13 | $7700.00 | Window Closed / Lapsed |