US3797592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilizing roller
Assignee: Kennametal Inc
•
Filing: 1972-11-21
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Granted: 1974-03-19
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Expires: 1992-11-21
Abstract
Abstract A stabilizing roller, especially for a raise boring head, in which an outer sleeve having cemented hard metal carbide elements inserted therein is mounted by an anti-friction bearing arrangement on a massive central shaft. The stabilizing roller is adapted for being disposed vertically at the periphery of a raise boring head for guiding the head during cutting operations.
Inventors
- 👤 R Goodfellow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:25
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/10; E21B17/1057; E21B10/00; E21B10/08; E21B10/22; E21B10/26; E21B10/28; E21B10/30; E21B10/46; E21B10/50; E21B10/52; E21B7/00; E21B7/28
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
75 words
In a stabilizer roller, especially for mounting on a vertical axis at the periphery of a raise boring head; a massive shaft having a central region and reduced diameter end parts, a cylindrical sleeve surrounding said central region, end caps fixedly connected to said end parts and telescopically engaging the end portions of said sleeve, and antifriction bearing means supporting said sleeve on said central region of said shaft and clamped between said end caps.
Claim 2
Dependent Claim
75 words
In a stabilizer roller, especially for mounting on a vertical axis at the periphery of a raise boring head; a massive shaft having a central region and reduced diameter end parts, a cylindrical sleeve surrounding said central region, end caps fixedly connected to said end parts and telescopically engaging the end portions of said sleeve, and antifriction bearing means supporting said sleeve on said central region of said shaft and clamped between said end caps.
Claim 3
Dependent Claim
42 words
A stabilizer roller according to claim 1 in which said sleeve is provided with radial bores distributed Axially and circumferentially thereout, and elements of hard wear resistant material fixed in said radial bores and protruding therefrom toward the outsides of said sleeve.
Claim 4
Dependent Claim
19 words
A stabilizer roller according to claim 2 in which said elements are formed of a cemented hard carbide material.
Claim 5
Dependent Claim
15 words
A stabilizer roller according to claim 3 in which said carbide material is tungsten carbide.
Claim 6
Dependent Claim
113 words
A stabilizer roller according to claim 1 in which said bearing means comprises inner race means fitted on said central region of said shaft, outer race means fitted into said sleeve, and rolling elements fitted between said race means, a clamp ring clamped between each end cap and the adjacent end of said inner race means, a seal element sealingly engaging the radially outer side of each ring and each having a metal carrier engaging the adjacent end of said outer race means, a seal ring between each end cap and the adjacent metal carrier and a further seal ring between each end cap and the respective reduced diameter part of said shaft.
Claim 7
Dependent Claim
126 words
A stabilizer roller according to claim 1 in which said bearing means comprises a single elongated outer race and a pair of axially spaced inner races and rollers between each inner race and the outer race, means holding said sleeve against axial movement on said outer race, a clamp ring clamped between each end cap and the axially outer end of the adjacent inner race, a seal element sealingly engaging the radially outer side of each clamp ring, a metal carrier for each seal element having an axial flange telescopically engaging the inside of the adjacent end of said outer race, and resilient O-rings in each end cap engaging the radially outer sides of the adjacent metal carrier and the adjacent end part of said shaft.
Claim 8
Dependent Claim
24 words
A stabilizer roller according to claim 1 in which each end cap has an axial portion adapted to be clamped in a support saddle.
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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |