Patent US3567975A successfully refreshed from Google Patents.
US3567975A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric high-speed spindle with cooling means
Assignee: Individual
•
Filing: 1969-12-12
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Granted: 1971-03-02
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Expires: 1989-12-12
Abstract
Abstract A tubular housing piece and a tubular member telescoped within the housing piece for defining separate liquid passageways. Connectors are attached to the tubular assembly for conducting liquid into and away from the assembly. An armature is rotatably supported in the assembly by means of a bearing, and a bearing support member is disposed adjacent the tubular member and its liquid passageways so that the bearing support and the bearing itself are cooled by liquid flowing through the passageways. The tubular assembly is of one uniform diameter throughout the extent of the liquid passageways, and the assembly has drilled holes in one end, for providing the liquid inlet port and the liquid outlet port in flow communication with the respective liquid passageways.
Inventors
- 👤 Marvin L Biesack
- 👤 Donald W Loomis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:48
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/20; H02K5/203
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
244 words
An electric high-speed spindle with cooling means, comprising a tubular housing piece having an inner surface extending along the longitudinal axis of said piece, an electric stator disposed inside said housing piece, an electric armature rotatably mounted in said stator and having an end extending beyond said stator and presenting a front end of said armature, a work tool-holding member connected to said armature front end and extending therebeyond for releasably holding a work tool for rotation with said armature, a bearing on said front end and on the opposite end of said armature for rotatably supporting the latter, a bearing support member interposed between said housing piece inner surface and said bearing on said front end of said armature, a tubular member fluid tightly telescoped within said tubular housing piece and extending into overlying contact with said bearing support member, said tubular member having a liquid inlet passageway spiraled therealong and having a liquid outlet passageway spiraled therealong and with said passageways extending along said tubular member to be in the plane extending transverse to the longitudinal axis of said armature and through said bearing support member for conducting cooling liquid along said housing and adjacent said bearing support member, said tubular housing piece and said tubular member fully defining said liquid passageways and thereby being arranged to fully contain the cooling liquid between said housing piece and said tubular member for cooling said stator and said armature and said bearing support member.
Claim 2
Dependent Claim
244 words
An electric high-speed spindle with cooling means, comprising a tubular housing piece having an inner surface extending along the longitudinal axis of said piece, an electric stator disposed inside said housing piece, an electric armature rotatably mounted in said stator and having an end extending beyond said stator and presenting a front end of said armature, a work tool-holding member connected to said armature front end and extending therebeyond for releasably holding a work tool for rotation with said armature, a bearing on said front end and on the opposite end of said armature for rotatably supporting the latter, a bearing support member interposed between said housing piece inner surface and said bearing on said front end of said armature, a tubular member fluid tightly telescoped within said tubular housing piece and extending into overlying contact with said bearing support member, said tubular member having a liquid inlet passageway spiraled therealong and having a liquid outlet passageway spiraled therealong and with said passageways extending along said tubular member to be in the plane extending transverse to the longitudinal axis of said armature and through said bearing support member for conducting cooling liquid along said housing and adjacent said bearing support member, said tubular housing piece and said tubular member fully defining said liquid passageways and thereby being arranged to fully contain the cooling liquid between said housing piece and said tubular member for cooling said stator and said armature and said bearing support member.
Claim 3
Dependent Claim
55 words
The subject matter of claim 1, wherein said tubular housing piece and said tubular member are cylindrical throughout their lengths and wherein said passageways are spiraled separate from but adjacent each other and with a common crossover passageway in liquid flow communication with both said spiraled passageways at said location adjacent said bearing support member.
Claim 4
Dependent Claim
40 words
The subject matter of claim 1, wherein said bearings are spaced-apart along said armature, said passageways extending along said tubular member for a distance greater than the spacing between said bearings for conducting liquid coolant to locations adjacent said bearings.
Claim 5
Dependent Claim
68 words
The subject matter of claim 2, wherein said tubular housing piece and said tubular member have both a fluid inlet port and a fluid outlet port formed in both said tubular housing piece and said tubular member and being drilled holes extending along the mating telescoping surfaces thereof, and with respective ones of said two ports being in fluid flow communication with respective ones of said two passageways.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |