US4150476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of mounting insert for mining tools and the like
Assignee: Kennametal Inc
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Filing: 1977-10-19
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Granted: 1979-04-24
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Expires: 1997-10-19
Abstract
Abstract An insert, especially a hard wear resistant insert, such as an insert of cemented hard metal carbide, for use in a mining tool or the like. The insert is especially adapted for being press fitted into the body of a mining tool or the like but may also be brazed or cemented therein. The insert has a rounded outer end and a flat inner end and tapers inwardly immediately adjacent the flat inner end and is rounded at the periphery of the flat inner end thereby eliminating stress risers in the insert and providing for easier insertion thereof into a bore in a tool body into which the insert is seated.
Inventors
- 👤 John F. Kita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:35
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/56; B; B23; B23P; B23P11/00; B23P15/00; B23P15/28; Y; Y10; Y10S; Y10S29/00; Y10S29/036; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49945; Y10T407/00; Y10T407/22; Y10T407/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
The method of mounting a hard wear resistant rod-like insert in the body of a mining bit which comprises: drilling a hole in the body to a depth equal to a substantial portion of the length of the insert, forming on the inner end of the insert a flat central area normal to the longitudinal axis of the insert, rounding when viewed in side the peripheral surface of the flat central region and tapering a surface leading from the rounded area to the envelope of the insert, reaming the bottom of the hole to a configuration substantially the same as the inner end of the insert, densifying the surface of the hole, and press-fitting the insert in the hole with the inner end of the insert engaging the bottom of the hole.
Claim 2
Independent Claim
132 words
The method of mounting a hard wear resistant rod-like insert in the body of a mining bit which comprises: drilling a hole in the body to a depth equal to a substantial portion of the length of the insert, forming on the inner end of the insert a flat central area normal to the longitudinal axis of the insert, rounding when viewed in side the peripheral surface of the flat central region and tapering a surface leading from the rounded area to the envelope of the insert, reaming the bottom of the hole to a configuration substantially the same as the inner end of the insert, densifying the surface of the hole, and press-fitting the insert in the hole with the inner end of the insert engaging the bottom of the hole.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-23 | 1982-10-23 | 1983-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-23 | 1986-10-23 | 1987-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-23 | 1990-10-23 | 1991-04-24 | $7700.00 | Window Closed / Lapsed |