US3729064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine tool
Assignee: New Britain Machine Co
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Filing: 1971-01-18
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Granted: 1973-04-24
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Expires: 1991-01-18
Abstract
Abstract A machine tool having a power driven rotatable tool spindle and an oil distribution and lubrication system for supplying oil to the bearings and tool spindle and preferably stabilizing the bearings, spindle and spindle housing at a predetermined operating temperature range.
Inventors
- 👤 H Wolf
- 👤 A Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:11
CPC Classifications
B; B23; B23Q; B23Q11/00; B23Q11/12; B23Q11/121; B23Q11/123; B23B; B23B31/00; B23B31/02; B23B31/24; B23B31/26; B23Q11/14; B23Q11/141; B23Q11/143; F; F16; F16N; F16N39/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
206 words
In combination, a machine tool comprising a rotatable tool spindle including a tool engaging end and an opposite end, first and second bearing means for supporting said tool engaging and opposite tool spindle ends, said spindle including a longitudinally extending liquid passage means extending through said spindle means adjacent to at least one of said first and second bearing means, liquid inlet means communicating with one end of said longitudinally extending liquid passage means, and liquid outlet means communicating with the other end of said longitudinally extending liquid passage means, and means for delivering liquid to said inlet means and for receiving liquid from said outlet means during the rotation of said spindle comprising liquid cooling means for selectively removing heat from said liquid when the temperature of said spindle and hence the temperature of the liquid increases beyond a predetermined maximum temperature whereby heat will be transferred from said spindle directly to the liquid without first being transferred to said one bearings, and liquid heating means for selectively raising the temperature of said liquid when the temperature of said spindle and hence the temperature of the liquid decreases below a predetermined maximum temperature whereby heat will be directly transferred from the liquid to said spindle.
Claim 2
Dependent Claim
206 words
In combination, a machine tool comprising a rotatable tool spindle including a tool engaging end and an opposite end, first and second bearing means for supporting said tool engaging and opposite tool spindle ends, said spindle including a longitudinally extending liquid passage means extending through said spindle means adjacent to at least one of said first and second bearing means, liquid inlet means communicating with one end of said longitudinally extending liquid passage means, and liquid outlet means communicating with the other end of said longitudinally extending liquid passage means, and means for delivering liquid to said inlet means and for receiving liquid from said outlet means during the rotation of said spindle comprising liquid cooling means for selectively removing heat from said liquid when the temperature of said spindle and hence the temperature of the liquid increases beyond a predetermined maximum temperature whereby heat will be transferred from said spindle directly to the liquid without first being transferred to said one bearings, and liquid heating means for selectively raising the temperature of said liquid when the temperature of said spindle and hence the temperature of the liquid decreases below a predetermined maximum temperature whereby heat will be directly transferred from the liquid to said spindle.
Claim 3
Dependent Claim
32 words
A combination according to claim 1, wherein said delivering and receiving means further comprises heat responsive means for controlling the selected operation of said liquid cooling means and said liquid heating means.
Claim 4
Dependent Claim
16 words
A combination according to claim 1, wherein said one bearing means comprises tapered roller bearing means.
Claim 5
Dependent Claim
25 words
A combination according to claim 3, wherein said liquid passage means further comprises means for spraying oil onto the opposite faces of said bearing means.
Claim 6
Dependent Claim
18 words
A combination according to claim 3, wherein said longitudinally extending liquid passage means further comprises an axial bore.
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) | 1976-04-23 | 1976-10-23 | 1977-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-23 | 1980-10-23 | 1981-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-23 | 1984-10-23 | 1985-04-24 | $7700.00 | Window Closed / Lapsed |