Patent US3900186A successfully refreshed from Google Patents.
US3900186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic cell stirrer
Assignee: WHEATON HOLDING Inc A Corp OF
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Filing: 1974-09-12
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Granted: 1975-08-19
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Expires: 1994-09-12
Abstract
Abstract This specification discloses several embodiments of the basic concept of providing a magnetic stirrer for a container of cells which is characterized by the inclusion of a magnet that is mounted on the lower end of a shaft which is mounted on or in a closure for an opening in the top of the container in such a manner that when magnetic forces are applied to the magnet from a rotating magnet external of the bottom of the container the magnet on the shaft is rotated, and, due either to the construction of the shaft which in most of the embodiments is flexible, or to its mounting on the closure, will move radially outwardly and upwardly in the container under the influence of the centrifugal force generated by its rotation. In the flexible shaft embodiments provision is made for adjusting the flexing amplitude of the shaft. Provision is also made for the introduction of a fluid, either gaseous or liquid, into the container through the closure and in addition to the culture or other material which is being stirred.
Inventors
- 👤 John Thomas Balas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:05
CPC Classifications
C; C12; C12M; C12M23/00; C12M23/02; C12M23/08; B; B01; B01F; B01F31/00; B01F31/42; B01F33/00; B01F33/45; B01F33/453; B01F33/4537; C12M27/00; C12M27/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
199 words
For use with a container for stirring cells and the like, said container including a bottom, a wall upstanding from said bottom, and an opening at the top, a magnetic flexible stirrer comprising: a. a closure for said opening with a central vertical passage and proportioned for a tight fitting relationship with said opening, said passage being offset at an angle with respect to the vertical axis of the container and having a rigid tube received in said passage and a rigid suspension member having its upper end connected to the rigid tube and its lower end to a flexible shaft, said connection of the suspension member to the rigid tube lying in the vertical axis of the container whereby liquid may be introduced into said container through said rigid tube; b. a coated magnet rigidly mounted on said flexible shaft at the lower end thereof and closely adjacent to the bottom of said container when the stirrer is assembled therewith, whereby as said magnet is rotated by magnetic operating mechanism the shaft flexes into an arcuate configuration and moves upwardly and outwardly relative to said bottom by the centrifugal force generated by such rotation causing the said flexure.
Claim 2
Dependent Claim
199 words
For use with a container for stirring cells and the like, said container including a bottom, a wall upstanding from said bottom, and an opening at the top, a magnetic flexible stirrer comprising: a. a closure for said opening with a central vertical passage and proportioned for a tight fitting relationship with said opening, said passage being offset at an angle with respect to the vertical axis of the container and having a rigid tube received in said passage and a rigid suspension member having its upper end connected to the rigid tube and its lower end to a flexible shaft, said connection of the suspension member to the rigid tube lying in the vertical axis of the container whereby liquid may be introduced into said container through said rigid tube; b. a coated magnet rigidly mounted on said flexible shaft at the lower end thereof and closely adjacent to the bottom of said container when the stirrer is assembled therewith, whereby as said magnet is rotated by magnetic operating mechanism the shaft flexes into an arcuate configuration and moves upwardly and outwardly relative to said bottom by the centrifugal force generated by such rotation causing the said flexure.
Claim 3
Dependent Claim
191 words
For use with a container for stirring cells and the like, said contAiner including a bottom, a wall upstanding from said bottom, and an opening at the top, a magnetic flexible stirrer comprising: a. a closure for said opening formed with a central vertical passage and proportioned for a tight fitting relationship with said opening; b. a flexible shaft mounted in said central passage with said closure between the ends thereof; and c. a coated magnet rigidly mounted on said flexible shaft at the lower end thereof and closely adjacent to the bottom of said container when the stirrer is assembled therewith, whereby as said magnet is rotated by magnetic operating mechanism the shaft flexes into an arcuate configuration and moves upwardly and outwardly relative to said bottom by the centrifugal force generated by such rotation causing the said flexure. d. the flexible shaft is tubular, projects above the closure and is formed with a plurality of openings adjacent to the magnet, together with a fitting on the flexible shaft above the closure and a conduit connected to said fitting for introducing gas through the fitting and into the flexible shaft.
Claim 4
Dependent Claim
191 words
For use with a container for stirring cells and the like, said contAiner including a bottom, a wall upstanding from said bottom, and an opening at the top, a magnetic flexible stirrer comprising: a. a closure for said opening formed with a central vertical passage and proportioned for a tight fitting relationship with said opening; b. a flexible shaft mounted in said central passage with said closure between the ends thereof; and c. a coated magnet rigidly mounted on said flexible shaft at the lower end thereof and closely adjacent to the bottom of said container when the stirrer is assembled therewith, whereby as said magnet is rotated by magnetic operating mechanism the shaft flexes into an arcuate configuration and moves upwardly and outwardly relative to said bottom by the centrifugal force generated by such rotation causing the said flexure. d. the flexible shaft is tubular, projects above the closure and is formed with a plurality of openings adjacent to the magnet, together with a fitting on the flexible shaft above the closure and a conduit connected to said fitting for introducing gas through the fitting and into the flexible shaft.
References Cited (Backward Citations)
US2932493A
Cited
US3245665A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |