US3622129A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic stirrer apparatus
Assignee: Bellco Glass Inc
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Filing: 1969-05-14
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Granted: 1971-11-23
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Expires: 1989-05-14
Abstract
Abstract Magnetic stirrer apparatus is disclosed, wherein a shaft extends through the bore of a closure in sealing relation therewith, and a magnetic stirrer bar is rotatably coupled to the closure. In one form of the invention, the stirrer bar is pivoted on the shaft adjacent one end thereof. In another form, the shaft and stirrer bar are pivoted on the closure. Longitudinal adjustment of the shaft in the stopper provides adjustment of the apparatus for use in vessels of various sizes. In one form of the apparatus, the shaft and stirrer bar are wholly encapsulated in chemically inert plastic material, thereby avoiding contamination of stirred matter.
Inventors
- 👤 Edward Mazowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:01
CPC Classifications
B; B01; B01F; B01F33/00; B01F33/45; B01F33/453; B01F33/4537; B01F33/4534; C; C12; C12M; C12M27/00; C12M27/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
125 words
A magnetic stirrer apparatus for use with a nonmagnetic vessel having a gastight closure with an aperture therein connecting the interior of said vessel with the exterior comprising a stirrer bar, said stirrer bar being comprised of material that is responsive to magnetic forces, a sleeve, said sleeve supporting said stirrer bar and having an upper portion and a lower portion, elongated means, one end of said elongated means being coupled to the upper portion of said sleeve for relative rotation therebetween, the other end of said elongated means being substantially the same size as the aperture to extend therethrough in frictional sliding relation to the closure so that the aperture will be sealed when said stirrer bar is adjacent the bottom of the vessel.
Claim 2
Dependent Claim
125 words
A magnetic stirrer apparatus for use with a nonmagnetic vessel having a gastight closure with an aperture therein connecting the interior of said vessel with the exterior comprising a stirrer bar, said stirrer bar being comprised of material that is responsive to magnetic forces, a sleeve, said sleeve supporting said stirrer bar and having an upper portion and a lower portion, elongated means, one end of said elongated means being coupled to the upper portion of said sleeve for relative rotation therebetween, the other end of said elongated means being substantially the same size as the aperture to extend therethrough in frictional sliding relation to the closure so that the aperture will be sealed when said stirrer bar is adjacent the bottom of the vessel.
Claim 3
Dependent Claim
70 words
A magnetic stirrer apparatus as defined in claim 1 wherein said sleeve is an elongated hollow member having at least two axially aligned bores of different diameters that define a downwardly facing bearing surface, said one end of said elongated means defining an upwardly facing bearing surface, and said elongated means is slidably received by said aligned bores and said bearing surfaces are in sliding rotational contact with each other.
Claim 4
Dependent Claim
30 words
A magnetic stirrer apparatus as defined in claim 2 including a transversely extending bore in said lower portion of said sleeve, and said stirrer bar being receivEd in said opening.
Claim 5
Dependent Claim
104 words
Magnetic stirrer apparatus for use with a sealed nonmagnetic vessel comprising closure means positioned across an opening in said vessel to make a gastight seal, a downwardly depending hollow member having at least two axially aligned bores depending from said closure means, said bores defining an upwardly facing bearing surface, elongated means having one end receivable in said larger bore, said end defining a downwardly facing bearing surface, said bearing surfaces being in sliding rotational contact with each other to permit relative rotation between the vessel and said elongated means, a stirrer bar coupled in transverse relation to said elongated means for movement therewith.
Claim 6
Dependent Claim
104 words
Magnetic stirrer apparatus for use with a sealed nonmagnetic vessel comprising closure means positioned across an opening in said vessel to make a gastight seal, a downwardly depending hollow member having at least two axially aligned bores depending from said closure means, said bores defining an upwardly facing bearing surface, elongated means having one end receivable in said larger bore, said end defining a downwardly facing bearing surface, said bearing surfaces being in sliding rotational contact with each other to permit relative rotation between the vessel and said elongated means, a stirrer bar coupled in transverse relation to said elongated means for movement therewith.
Claim 7
Dependent Claim
112 words
Magnetic stirrer apparatus comprising a sleeve, said sleeve being a hollow elongated member having at least two axially aligned bores of different diameters that define a downwardly facing bearing surface, an elongated means, said elongated means having an enlarged portion defining an upwardly facing bearing surface at one end thereof, said elongated means and said enlarged portion being axially slidably received in said bores so that said bearing surfaces are in sliding rotational contact with each other, a portion of said sleeve having a transverse bore disposed below said enlarged portion, and a stirrer bar disposed in said transverse bore to limit said axially sliding between said sleeve and said elongated member.
Claim 8
Dependent Claim
112 words
Magnetic stirrer apparatus comprising a sleeve, said sleeve being a hollow elongated member having at least two axially aligned bores of different diameters that define a downwardly facing bearing surface, an elongated means, said elongated means having an enlarged portion defining an upwardly facing bearing surface at one end thereof, said elongated means and said enlarged portion being axially slidably received in said bores so that said bearing surfaces are in sliding rotational contact with each other, a portion of said sleeve having a transverse bore disposed below said enlarged portion, and a stirrer bar disposed in said transverse bore to limit said axially sliding between said sleeve and said elongated member.
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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) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |