US3604769A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Temperature-controlled spindle for centrifuges and similar apparatus
Assignee: Haemonetics Corp
•
Filing: 1968-09-23
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Granted: 1971-09-14
•
Expires: 1988-09-23
Abstract
Abstract An oil and air cooled rotating spindle. By means of an oil flow path, heat sinks and air-cooled surfaces, the spindle during operation may be constantly maintained at or near ambient temperature thus preventing any changes in temperature of the apparatus rotated by the spindle and hence in any material contained in the apparatus.
Inventors
- 👤 Allen Latham Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 04:15
CPC Classifications
B; B04; B04B; B04B9/00; B04B15/00; B04B15/02; B04B9/12
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
138 words
An apparatus adapted for rapid rotation at a constant, predetermined temperature level, comprising in combination a. a rotatable spindle; b. upper and lower bearing means adapted to maintain said spindle in alignment; c. heavy-walled tubing means surrounding substantially the entire length of said spindle; d. upper bearing cooling means comprising a pump adapted to circulate bearing oil in contact with said upper bearing means and then in contact with a portion of the inner wall of said tubing which defines an oil chamber around said pump; e. extended heat transfer surface means in heat exchange relationship with said tubing; and f. means for maintaining said heat transfer surface means at a predetermined essentially constant temperature, whereby the heat flow path comprises said upper bearing means, said bearing oil, said heavy-walled tubing and said extended heat transfer surface means.
Claim 2
Independent Claim
138 words
An apparatus adapted for rapid rotation at a constant, predetermined temperature level, comprising in combination a. a rotatable spindle; b. upper and lower bearing means adapted to maintain said spindle in alignment; c. heavy-walled tubing means surrounding substantially the entire length of said spindle; d. upper bearing cooling means comprising a pump adapted to circulate bearing oil in contact with said upper bearing means and then in contact with a portion of the inner wall of said tubing which defines an oil chamber around said pump; e. extended heat transfer surface means in heat exchange relationship with said tubing; and f. means for maintaining said heat transfer surface means at a predetermined essentially constant temperature, whereby the heat flow path comprises said upper bearing means, said bearing oil, said heavy-walled tubing and said extended heat transfer surface means.
Claim 3
Dependent Claim
17 words
An apparatus in accordance with claim 1 including flexible mounting means associated with said upper bearing means.
Claim 4
Dependent Claim
12 words
an oil-contacting surface defining the outer wall of said oil pump, and
Claim 5
Dependent Claim
12 words
an oil-contacting surface defining the outer wall of said oil pump, and
Claim 6
Dependent Claim
12 words
oil dam means extending between said heavy-walled tubing means and said casing.
Claim 7
Dependent Claim
12 words
oil dam means extending between said heavy-walled tubing means and said casing.
Claim 8
Dependent Claim
22 words
An apparatus in accordance with claim 2 wherein said flexible mounting means comprises an annular elastomeric ring surrounding said upper bearing means.
Claim 9
Dependent Claim
15 words
An apparatus in accordance with claim 1 wherein said heavy-walled tubing is formed of aluminum.
Claim 10
Dependent Claim
12 words
An apparatus in accordance with claim 1 wherein said oil pump comprises:
Claim 11
Dependent Claim
49 words
An apparatus in accordance with claim 1 wherein said extended heat transfer surface means are fins thermally bonded to the outer surface of said tubing and said means for maintaining said surface means at said temperature comprises means for circulating an essentially constant-temperature fluid in contact with said surfaces.
Claim 12
Dependent Claim
42 words
An apparatus in accordance with claim 6 wherein said fins are mounted within a cylindrical housing surrounding at least a portion of said spindle and said means for circulating said fluid comprises a fan adapted to circulate said fluid over said fins.
Claim 13
Dependent Claim
51 words
An apparatus in accordance with claim 7 wherein said cylindrical housing is in fluid communication with the ambient air surrounding said apparatus and said fluid is air whereby said apparatus, the liquid contained therein and all liquids passed therethrough are maintained at essentially ambient temperature throughout the processing of said liquid.
Claim 14
Dependent Claim
20 words
An apparatus in accordance with claim 1 including means for monitoring the oil level in said upper bearing cooling means.
References Cited (Backward Citations)
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US2266107A
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US2386639A
Cited
US2391512A
Cited
US2836471A
Cited
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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) | 1974-09-13 | 1975-03-15 | 1975-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-13 | 1979-03-15 | 1979-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-13 | 1983-03-15 | 1983-09-14 | $7700.00 | Window Closed / Lapsed |