US3713707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bearing seal
Assignee: Sunoco Inc
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Filing: 1970-01-12
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Granted: 1973-01-30
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Expires: 1990-01-12
Abstract
Abstract A bearing seal especially useful in drill bits is arranged so that the heat emanating from the friction created by rotation of one part about another is substantially reduced before reaching the sealing element. This is accomplished by dissipating the heat into the surrounding environment through a thin metallic element located in the heat path preceding the sealing element. Additionally, the heat path is arranged to be circuitous so that the heat has a long pathway in contact with the surrounding environment.
Inventors
- 👤 J Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:31
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/08; E21B10/22; E21B10/25; F; F16; F16C; F16C33/00; F16C33/72; F16C33/76; F16C33/78; F16J; F16J15/00; F16J15/16; F16J15/162; F16J15/34; F16J15/36; F16J15/363; F16C2352/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
148 words
In a drill bit for use in drilling earth formations having a cone rotatably attached to a shank where such rotation creates high temperatures, a sealing assembly for preventing the environment surrounding the drill bit from communicating with the point of rotation of the cone on the shank, comprising: a first annular thin corrugated metallic heat dissipating means having one end attached to the shank; a first sealing member attached to the end of the first heat dissipating means which is not attached to the shank; a second annular thin corrugated metallic heat dissipating means having an end attached to the cone; and a second sealing member attached to the end of the heat dissipating means which is not attached to the cone, and is in slidable contact with the first sealing member, wherein the first and second sealing members are spaced from the shank and the cone.
Claim 2
Dependent Claim
148 words
In a drill bit for use in drilling earth formations having a cone rotatably attached to a shank where such rotation creates high temperatures, a sealing assembly for preventing the environment surrounding the drill bit from communicating with the point of rotation of the cone on the shank, comprising: a first annular thin corrugated metallic heat dissipating means having one end attached to the shank; a first sealing member attached to the end of the first heat dissipating means which is not attached to the shank; a second annular thin corrugated metallic heat dissipating means having an end attached to the cone; and a second sealing member attached to the end of the heat dissipating means which is not attached to the cone, and is in slidable contact with the first sealing member, wherein the first and second sealing members are spaced from the shank and the cone.
Claim 3
Dependent Claim
148 words
In a drill bit for use in drilling earth formations having a cone rotatably attached to a shank where such rotation creates high temperatures, a sealing assembly for preventing the environment surrounding the drill bit from communicating with the point of rotation of the cone on the shank, comprising: a first annular thin corrugated metallic heat dissipating means having one end attached to the shank; a first sealing member attached to the end of the first heat dissipating means which is not attached to the shank; a second annular thin corrugated metallic heat dissipating means having an end attached to the cone; and a second sealing member attached to the end of the heat dissipating means which is not attached to the cone, and is in slidable contact with the first sealing member, wherein the first and second sealing members are spaced from the shank and the cone.
Claim 4
Dependent Claim
148 words
In a drill bit for use in drilling earth formations having a cone rotatably attached to a shank where such rotation creates high temperatures, a sealing assembly for preventing the environment surrounding the drill bit from communicating with the point of rotation of the cone on the shank, comprising: a first annular thin corrugated metallic heat dissipating means having one end attached to the shank; a first sealing member attached to the end of the first heat dissipating means which is not attached to the shank; a second annular thin corrugated metallic heat dissipating means having an end attached to the cone; and a second sealing member attached to the end of the heat dissipating means which is not attached to the cone, and is in slidable contact with the first sealing member, wherein the first and second sealing members are spaced from the shank and the cone.
Claim 5
Dependent Claim
43 words
The drill bit of claim 1 wherein the first heat dissipating means has only the end attached to the shank in contact with the shank and wherein the first sealing member is spaced from the attached end of the first heat dissipating means.
Claim 6
Dependent Claim
43 words
The drill bit of claim 1 wherein the second heat dissipating means has only the end attached to the cone in contact with the cone and wherein the second sealing member is spaced from the attached end of the second heat dissipating means.
Claim 7
Dependent Claim
105 words
The drill bit of claim 1 wherein the first heat dissipating means has a substantial portion thereof in contact with the environment surrounding the drill bit and out of contact with the shank, and wherein such substantial portion is located between the attached end of the first heat dissipating means and the first sealing member and wherein the second heat dissipating means has a substantial portion thereof in contact with the environment surrounding the drill bit and out of contact with the cone, and wherein such substantial portion is located between the attached end of the second heat dissipating means and the second sealing member.
Claim 8
Dependent Claim
34 words
The apparatus of claim 1 wherein the first and second heat dissipating means are constructed of a high heat conductive thin flexible material having low transverse heat conducting properties relative to its vertical conductivity.
Claim 9
Dependent Claim
39 words
The apparatus of claim 1 wherein the cone, shank and first and second heat dissipating members are arranged to provide a circuitous heat pathway to the first and second sealing members for heat generated at the point of rotation.
Claim 10
Dependent Claim
38 words
The apparatus of claim 1 wherein the first and second heat dissipating means have a substantial portion of their surfaces in contact with the environment surrounding the drill bit and out of contact with the cone and shank.
Claim 11
Dependent Claim
17 words
The apparatus of claim 1 including means for maintaining the first and second sealing members in contact.
References Cited (Backward Citations)
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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) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |