Patent US3850580A successfully refreshed from Google Patents.
US3850580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Laboratory mixer
Assignee: Manufacturers Hanover Trust Co
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Filing: 1973-03-15
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Granted: 1974-11-26
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Expires: 1993-03-15
Abstract
Abstract A mixer for mixing fluent material contained in test tubes, flasks and like vessels is provided with a resilient surface for receiving the vessel. The surface is then driven eccentrically to agitate the vessel for producing a vortex mixing action in the vessel. Since the surface is resilient, the amount of agitation imparted to the vessel is dependent on the force with which the vessel is pressed against and into the resilient surface.
Inventors
- 👤 D Moore
- 👤 W Walsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:23
CPC Classifications
B; B01; B01F; B01F31/00; B01F31/20; B01F31/22
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
80 words
IN A LABORATORY MIXER HAVING A BASE, A PLATE SUPPORTED ABOVE THE BASE AND AN ECCENTRIC DRIVE MEANS MOUNTED ON THE BASE AND OPERATIVELY CONNECTED TO THE PLATE TO SHAKE THE PLATE, THE IMPROVEMENT COMPRISING A SUBSTANTIALLY FLAT RESILIENT FOAMED RUBBER PAD FIXED TO THE UPPER SURFACE OF SAID PLATE TO RECEIVED THEREON A VESSEL TO BE AGITATED, THE DEGREE OF AGITATION IMPARTED TO SAID VESSEL BEING DETERMINED SOLELY BY THE FORCE WITH SAID VESSEL IS PRESSED AGAINST SAID PAD.
Claim 2
Dependent Claim
80 words
IN A LABORATORY MIXER HAVING A BASE, A PLATE SUPPORTED ABOVE THE BASE AND AN ECCENTRIC DRIVE MEANS MOUNTED ON THE BASE AND OPERATIVELY CONNECTED TO THE PLATE TO SHAKE THE PLATE, THE IMPROVEMENT COMPRISING A SUBSTANTIALLY FLAT RESILIENT FOAMED RUBBER PAD FIXED TO THE UPPER SURFACE OF SAID PLATE TO RECEIVED THEREON A VESSEL TO BE AGITATED, THE DEGREE OF AGITATION IMPARTED TO SAID VESSEL BEING DETERMINED SOLELY BY THE FORCE WITH SAID VESSEL IS PRESSED AGAINST SAID PAD.
Claim 3
Dependent Claim
50 words
A laboratory mixer as in claim 1 including at least three spring wire rods upstanding from said base, said plate being supported on the upper ends of said rods, said rods preventing rotation of said plate while permiting said plate to vibrate responsive to operation of said eccentric drive means.
Claim 4
Dependent Claim
119 words
A laboratory mixer comprising: a. a base; b. at least three spring wire rods upstanding from said base; c. a plate supported on the upstanding ends of said rods; d. motor means mounted on said base; e. eccentric means operatively connected to said plate to shake said plate when driven by said motor means; and f. vessel contact means including a substantially flat pad of resilient material fixed to said plate and adapted to transfer the eccentric motion of said plate to a vessel manually pressed against said pad, the degree of agitation imparted to said vessel by said resilient pad being dependent upon the force with which said vessel is made to frictionally engage and compress said pad.
Claim 5
Dependent Claim
119 words
A laboratory mixer comprising: a. a base; b. at least three spring wire rods upstanding from said base; c. a plate supported on the upstanding ends of said rods; d. motor means mounted on said base; e. eccentric means operatively connected to said plate to shake said plate when driven by said motor means; and f. vessel contact means including a substantially flat pad of resilient material fixed to said plate and adapted to transfer the eccentric motion of said plate to a vessel manually pressed against said pad, the degree of agitation imparted to said vessel by said resilient pad being dependent upon the force with which said vessel is made to frictionally engage and compress said pad.
Claim 6
Dependent Claim
20 words
A laboratory mixer as in claim 3 wherein said substantially flat resilient pad is made of closed cell foamed neoprene.
Claim 7
Dependent Claim
53 words
A laboratory mixer as in claim 3 including a housing enclosing said motor and a major portion of said spring wire rods, there being openings in the top of said housing to permit passage of the upper ends of said rods so that said plate is supported above the top of said housing.
References Cited (Backward Citations)
US3061280A
Cited
US3159384A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |