US3570819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic stirrers
Assignee: Individual
•
Filing: 1968-01-08
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Granted: 1971-03-16
•
Expires: 1988-01-08
Abstract
Abstract This invention relates to improvements in magnetic stirrers, wherein means such as, apparatus to change the relative position of the magnetic driving means and the vessel, a rotor having a substantially circular portion in its plane of rotation and adjustable baffle elements, are provided singly or in combination to enable the stirring characteristics of the stirrer to be adjustable over a wide range. Means are further provided for indexing the settings of the above variables so that any particular stirring pattern may be easily and accurately duplicated.
Inventors
- 👤 Arther Rosinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:02
CPC Classifications
B; B01; B01F; B01F33/00; B01F33/45; B01F33/452; B01F35/00; B01F35/55
Claims Analysis
Total Claims: 52
Claim 1
Independent Claim
101 words
A MAGNETIC STIRRER FOR STIRRING A FLUID MEDIUM WITHIN A VESSEL COMPRISING: MEANS FOR SUPPORTING SAID VESSEL; A ROTOR ADAPTED TO BE AT LEAST PARTIALLY IMMERSED IN SAID FLUID, AT LEAST A PORTION OF SAID ROTOR BEING COMPRISED OF MAGNETIC MATERIAL; MAGNETIC DRIVING MEANS COUPLED TO SAID ROTOR FOR IMPARTING MOTION TO SAID ROTOR; MEANS FOR CHANGING THE RELATIVE POSITION OF SAID MAGNETIC DRIVING MEANS WITH RESPECT TO THE VESSEL FOR CHANGING THE RELATIVE POSITION OF SAID ROTOR WITHIN SAID VESSEL; AND INDEXING MEANS COUPLED TO SAID CHANGING MEANS TO DETERMINE THE POSITION OF SAID DRIVING MEANS RELATIVE TO SAID VESSEL.
Claim 2
Dependent Claim
101 words
A MAGNETIC STIRRER FOR STIRRING A FLUID MEDIUM WITHIN A VESSEL COMPRISING: MEANS FOR SUPPORTING SAID VESSEL; A ROTOR ADAPTED TO BE AT LEAST PARTIALLY IMMERSED IN SAID FLUID, AT LEAST A PORTION OF SAID ROTOR BEING COMPRISED OF MAGNETIC MATERIAL; MAGNETIC DRIVING MEANS COUPLED TO SAID ROTOR FOR IMPARTING MOTION TO SAID ROTOR; MEANS FOR CHANGING THE RELATIVE POSITION OF SAID MAGNETIC DRIVING MEANS WITH RESPECT TO THE VESSEL FOR CHANGING THE RELATIVE POSITION OF SAID ROTOR WITHIN SAID VESSEL; AND INDEXING MEANS COUPLED TO SAID CHANGING MEANS TO DETERMINE THE POSITION OF SAID DRIVING MEANS RELATIVE TO SAID VESSEL.
Claim 3
Dependent Claim
20 words
A magnetic stirrer according to claim 1 wherein said magnetic driving means imparts a substantially rotary motion to said rotor.
Claim 4
Dependent Claim
23 words
A magnetic stirrer according to claim 1 wherein said rotor has a substantially circular circumference in the plane of motion of said rotor.
Claim 5
Dependent Claim
24 words
A magnetic stirrer according to claim 1 wherein said changing means includes means for moving said supporting means relative to said magnetic driving means.
Claim 6
Dependent Claim
22 words
A magnetic stirrer according to claim 4, wherein said changing means includes means for moving said supporting means in two different directions.
Claim 7
Dependent Claim
23 words
A magnetic stirrer according to claim 5, wherein said changing means includes means for moving said supporting means in two substantially perpendicular directions.
Claim 8
Dependent Claim
27 words
A magnetic stirrer according to claim 4 wherein said indexing means includes means for indicating the position of said supporting means relative to said magnetic driving means.
Claim 9
Dependent Claim
27 words
A magnetic stirrer according to claim 4 further comprising means coupled to said supporting means for locating said vessel at a predetermined position on said supporting means.
Claim 10
Dependent Claim
42 words
A magnetic stirrer according to claim 1 wherein said indexing means includes means associated with said supporting means for locating said vessel at a predetermined position on said supporting means and for indicating the position of said vessel on said supporting means.
Claim 11
Dependent Claim
26 words
A magnetic stirrer according to claim 9 wherein said locating means further includes means associated with said vessel for providing a reference point on said vessel.
Claim 12
Dependent Claim
45 words
A magnetic stirrer according to claim 10 wherein said locating means includes: means for positioning the sidewall of said vessel at a first predetermined position on said supporting mean; and means for positioning said reference point at a second predetermined position on said supporting means.
Claim 13
Dependent Claim
20 words
A magnetic stirrer according to claim 11 wherein said locating means includes an X-Y coordinate system on said supporting means.
Claim 14
Dependent Claim
50 words
A magnetic stirrer according to claim 10 further comprising: at least a first baffle element, a portion thereof being adapted to cooperate with said vessel to provide said reference point; and means for positioning said first baffle element within said vessel to be aT least partially immersed within said fluid.
Claim 15
Dependent Claim
35 words
A magnetic stirrer according to claim 1 further comprising: at least a first baffle element; and means for positioning said first baffle element within said vessel to be at least partially immersed in said fluid.
Claim 16
Dependent Claim
26 words
A magnetic stirrer according to claim 14 wherein said baffle positioning means includes means for adjusting the position of said first baffle element within said vessel.
Claim 17
Dependent Claim
26 words
A magnetic stirrer according to claim 15 wherein said adjusting means includes means to adjust the angular orientation of said first baffle element within said vessel.
Claim 18
Dependent Claim
41 words
A magnetic stirrer according to claim 16 wherein said baffle element includes an eccentrically mounted portion whereby adjustment of said positioning means also varies the distance between the wall of the vessel and said eccentrically mounted portion of said baffle element.
Claim 19
Dependent Claim
19 words
A magnetic stirrer according to claim 17 wherein;9c said eccentrically mounted portion is an eccentrically mounted substantially cylindrical member.
Claim 20
Dependent Claim
36 words
A magnetic stirrer according to claim 15 wherein said baffle positioning means includes means to adjust the relative position of the axis of said first baffle element with respect of a predetermined point on said vessel.
Claim 21
Dependent Claim
28 words
A magnetic stirrer according to claim 19 wherein said baffle positioning means further includes means to adjust the angular orientation of said first baffle element within said vessel.
Claim 22
Dependent Claim
26 words
A magnetic stirrer according to claim 14 further comprising: at least a second baffle element; and means for positioning said second baffle element within said vessel.
Claim 23
Dependent Claim
32 words
A magnetic stirrer according to claim 21 further comprising second adjusting means coupled to said second baffle element positioning means for adjusting the position of said second baffle element within said vessel.
Claim 24
Dependent Claim
38 words
A magnetic stirrer according to claim 21 wherein said first and second baffle element positioning means includes means for varying the relative positions of the axes of said first and second baffle elements with respect to each other.
Claim 25
Dependent Claim
38 words
A magnetic stirrer according to claim 21 wherein at least one of said first and second baffle element positioning means includes indexing means for indicating the positions of at least one of said first and second baffle elements.
Claim 26
Dependent Claim
23 words
A magnetic stirrer according to claim 14 wherein said rotor has a substantially circular circumference in the plane of motion of said rotor.
Claim 27
Dependent Claim
14 words
A magnetic stirrer according to claim 14 wherein said baffle element includes a plate.
Claim 28
Dependent Claim
151 words
A magnetic stirrer for stirring a fluid medium within a vessel comprising: means for supporting said vessel; a rotor adapted to be at least partially immersed in said fluid, at least a portion of said rotor being comprised of magnetic material and said rotor having a substantially flat portion which has a substantially circular circumference, the plane defined by the face of said flat portion being substantially parallel to the lower surface of said vessel; magnetic driving means coupled to said rotor for imparting rotary motion to said rotor about an axis substantially perpendicular to the flat face of said rotor; at least one baffle element; means for positioning said at least one baffle element within said vessel to be at least partially immersed in said fluid; and indexing means coupled to said baffle element positioning means for indicating the position of said at least one baffle element within said vessel.
Claim 29
Dependent Claim
151 words
A magnetic stirrer for stirring a fluid medium within a vessel comprising: means for supporting said vessel; a rotor adapted to be at least partially immersed in said fluid, at least a portion of said rotor being comprised of magnetic material and said rotor having a substantially flat portion which has a substantially circular circumference, the plane defined by the face of said flat portion being substantially parallel to the lower surface of said vessel; magnetic driving means coupled to said rotor for imparting rotary motion to said rotor about an axis substantially perpendicular to the flat face of said rotor; at least one baffle element; means for positioning said at least one baffle element within said vessel to be at least partially immersed in said fluid; and indexing means coupled to said baffle element positioning means for indicating the position of said at least one baffle element within said vessel.
Claim 30
Dependent Claim
101 words
A magnetic stirrer for stirring a fluid medium within first and second vessels, said first vessel being at least partially immersed within the fluid medium in said second vessel comprising: means for supporting said second vessel; means for supporting said first vessel within said second vessel; a first magnetic rotor at least partially immersed in the fluid in said first vessel; a second magnetic rotor immersed in the fluid in saiD second vessel and magnetically coupled to said first rotor; and driving means magnetically coupled to said second rotor for imparting motion to said second rotor and to said first rotor.
Claim 31
Dependent Claim
101 words
A magnetic stirrer for stirring a fluid medium within first and second vessels, said first vessel being at least partially immersed within the fluid medium in said second vessel comprising: means for supporting said second vessel; means for supporting said first vessel within said second vessel; a first magnetic rotor at least partially immersed in the fluid in said first vessel; a second magnetic rotor immersed in the fluid in saiD second vessel and magnetically coupled to said first rotor; and driving means magnetically coupled to said second rotor for imparting motion to said second rotor and to said first rotor.
Claim 32
Dependent Claim
22 words
A magnetic stirrer according to claim 28 wherein said first and second rotors have substantially circular circumferences in their planes of motion.
Claim 33
Dependent Claim
36 words
A magnetic stirrer according to claim 29 further comprising means for changing the relative position of said magnetic driving means with respect to said vessels for changing the relative positions of said rotors within said vessels.
Claim 34
Dependent Claim
41 words
A magnetic stirrer according to claim 28 further comprising: at least one baffle element; and means for mounting said baffle element within said first vessel, said baffle element being at least partially immersed in the fluid medium within said first vessel.
Claim 35
Dependent Claim
71 words
A rotor for a magnetic stirrer wherein at least a portion of said rotor is comprised of magnetic material, said rotor having: at least one substantially flat ring-shaped portion having a substantially circular circumference, the plane defined by the face of said flat ring-shaped portion being substantially parallel to the lower surface of the vessel of said magnetic stirrer; and an agitating portion secured to said at least one ring-shaped portion.
Claim 36
Dependent Claim
71 words
A rotor for a magnetic stirrer wherein at least a portion of said rotor is comprised of magnetic material, said rotor having: at least one substantially flat ring-shaped portion having a substantially circular circumference, the plane defined by the face of said flat ring-shaped portion being substantially parallel to the lower surface of the vessel of said magnetic stirrer; and an agitating portion secured to said at least one ring-shaped portion.
Claim 37
Dependent Claim
26 words
A rotor according to claim 32 wherein said magnetic material includes a magnet secured to said ring-shaped member, said magnet also functioning as said agitating portion.
Claim 38
Dependent Claim
30 words
A rotor according to claim 32 further including a second ring-shaped member secured to the other side of said magnet, thereby rendering said rotor functional also in its inverted position.
Claim 39
Dependent Claim
15 words
A rotor according to claim 32 wherein said ring-shaped portion is comprised of magnetic material.
Claim 40
Dependent Claim
15 words
A rotor according to claim 32 wherein said agitating portion is comprised of magnetic material.
Claim 41
Dependent Claim
38 words
A rotor for a magnetic stirrer comprising: a cup-shaped member having a lip portion extending outwardly from the walls of said cup, said lip functioning as a bumper for said rotor; and magnetic means inside said cup-shaped member.
Claim 42
Dependent Claim
38 words
A rotor for a magnetic stirrer comprising: a cup-shaped member having a lip portion extending outwardly from the walls of said cup, said lip functioning as a bumper for said rotor; and magnetic means inside said cup-shaped member.
Claim 43
Dependent Claim
21 words
A rotor according to claim 37 wherein said magnetic means inside said cup-shaped member is rotatable relative to said cup-shaped member.
Claim 44
Dependent Claim
72 words
A rotor for a magnetic stirrer wherein at least a portion of said rotor is comprised of magnetic material, said rotor having: a substantially flat disc-shaped portion having a substantially circular circumference, the plane defined by the face of said flat disc-shaped portion being substantially parallel to the lower surface of the vessel of said magnetic stirrer; and a substantially dome-shaped portion secured to the upper flat surface of said disc-shaped portion.
Claim 45
Dependent Claim
72 words
A rotor for a magnetic stirrer wherein at least a portion of said rotor is comprised of magnetic material, said rotor having: a substantially flat disc-shaped portion having a substantially circular circumference, the plane defined by the face of said flat disc-shaped portion being substantially parallel to the lower surface of the vessel of said magnetic stirrer; and a substantially dome-shaped portion secured to the upper flat surface of said disc-shaped portion.
Claim 46
Dependent Claim
18 words
A rotor according to claim 39 wherein said agitating portion includes protrusions on the surface of said rotor.
Claim 47
Dependent Claim
18 words
A rotor according to claim 39 wherein said magnetic material includes a magnet embedded in said disc-shaped portion.
Claim 48
Dependent Claim
17 words
A rotor according to claim 39 wherein said disc-shaped member is integral with said substantially dome-shaped portion.
Claim 49
Dependent Claim
20 words
A rotor according to claim 39 wherein said agitating portion includes at least one protrusion on said substantially dome-shaped portion.
Claim 50
Dependent Claim
15 words
A rotor according to claim 39 wherein said dome-shaped portion is a substantially hemispherical portion.
Claim 51
Dependent Claim
73 words
A rotor for a magnetic stirrer wherein at least a portion of said rotor is comprised of magnetic material, said rotor having: a substantially flat portion having substantially circular circumference, the plane defined by a face of said flat portion being substantially parallel to the lower surface of the vessel of said magnetic stirrer, characterized in that said magnetic material portion and said substantially flat portion are rotatable with respect to each other.
Claim 52
Dependent Claim
73 words
A rotor for a magnetic stirrer wherein at least a portion of said rotor is comprised of magnetic material, said rotor having: a substantially flat portion having substantially circular circumference, the plane defined by a face of said flat portion being substantially parallel to the lower surface of the vessel of said magnetic stirrer, characterized in that said magnetic material portion and said substantially flat portion are rotatable with respect to each other.
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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) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |