US4253773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid container
Assignee: 3M Co
•
Filing: 1979-08-20
•
Granted: 1981-03-03
•
Expires: 1999-08-20
Abstract
Abstract A container for shipping, storing and mixing at least two fluids has a covered cylindrical outer container for containing a first fluid and a coaxial, smaller diameter inner container for the second fluid. The inner container is closed at the end adjacent the cover of the outer container by a piston and at the opposite end by a removable seal. A plurality of mixing blades are spaced around the inner container and are coupled to a drive plate in the cover of the outer container for rotation therewith. The drive plate has an axial opening for a pusher rod to enter and push the piston down the inner container to expel the second fluid into the first fluid in the outer container, the fluids then being mixed by rotation of the drive plate.
Inventors
- 👤 Kenneth A. Aho
- 👤 Francis M. Farrell, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:27
CPC Classifications
B; B65; B65D; B65D81/00; B65D81/32; B65D81/3216; B65D81/3222
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
235 words
A container for shipping, storing and mixing at least two fluids, comprising: a cylindrical outer container for containing a first fluid, said outer container including a cover, a cylindrical inner container for containing a second fluid, said inner container having a smaller diameter than said outer container and being positioned coaxially therewith, the end of said inner container adjacent said cover of said outer container being closed by a piston and the opposite end being closed by an end seal that is removable under the pressure of fluid in said inner container when said piston is moved down said inner container, said inner container being so formed and supported within said outer container as to permit removal of said end seal and expulsion of fluid from said inner container into said outer container upon movement of said piston down said inner container, at least one mixing blade extending radially into said outer container and being rotatable with respect to said outer container about the axis of said inner and outer containers, a circular drive plate supported for rotation centrally in an opening in said outer container cover, said drive plate having an axial opening permitting communication therethrough to said piston in said inner container by a pusher rod for expelling fluid from said inner container into said outer container and being formed with means coupling said drive plate to said mixing blade for rotation together.
Claim 2
Dependent Claim
235 words
A container for shipping, storing and mixing at least two fluids, comprising: a cylindrical outer container for containing a first fluid, said outer container including a cover, a cylindrical inner container for containing a second fluid, said inner container having a smaller diameter than said outer container and being positioned coaxially therewith, the end of said inner container adjacent said cover of said outer container being closed by a piston and the opposite end being closed by an end seal that is removable under the pressure of fluid in said inner container when said piston is moved down said inner container, said inner container being so formed and supported within said outer container as to permit removal of said end seal and expulsion of fluid from said inner container into said outer container upon movement of said piston down said inner container, at least one mixing blade extending radially into said outer container and being rotatable with respect to said outer container about the axis of said inner and outer containers, a circular drive plate supported for rotation centrally in an opening in said outer container cover, said drive plate having an axial opening permitting communication therethrough to said piston in said inner container by a pusher rod for expelling fluid from said inner container into said outer container and being formed with means coupling said drive plate to said mixing blade for rotation together.
Claim 3
Dependent Claim
21 words
The container of claim 1 wherein there are a plurality of mixing blades spaced around said inner container and rotatable together.
Claim 4
Dependent Claim
24 words
The container of claim 2 wherein said mixing blades are formed on a cylindrical sleeve closely surrounding said inner container and being coaxial therewith.
Claim 5
Dependent Claim
25 words
The container of claim 3 wherein said cylindrical sleeve is formed of a plurality of cylindrical segments formed with means connecting them for rotation together.
Claim 6
Dependent Claim
43 words
The container of claim 3 wherein the end of said sleeve adjacent said cover is formed with axially extending slots and said drive plate is formed with axially extending tabs to rotatably couple said drive plate to said cylindrical sleeve for rotation together.
Claim 7
Dependent Claim
41 words
The container of claim 1, 2 or 3 wherein said drive plate is formed with a coaxial cylindrical extension fitting tightly within said inner container to seal the piston containing end of said inner container from fluid in said outer container.
Claim 8
Dependent Claim
27 words
The container of claim 1, 2 or 3 including a removable protective sheet adhesively bonded to said cover of said outer container and covering said drive plate.
Claim 9
Dependent Claim
71 words
The container of claim 1, 2 or 3 wherein said drive plate is formed with a pin receptacle spaced from said central opening therein for engagement by a pin on the cross bar of a mixing crank after the main shaft of the crank is inserted into said central opening, is moved axially down said inner container and has completely expelled a fluid in said inner container into said outer container.
Claim 10
Dependent Claim
21 words
The container of claim 1 wherein said cover of said outer container is removable to permit discharge of the mixed fluids.
References Cited (Backward Citations)
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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) | 1984-03-02 | 1984-09-01 | 1985-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-02 | 1988-09-01 | 1989-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-02 | 1992-09-01 | 1993-03-03 | $7700.00 | Window Closed / Lapsed |