US3923934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispensing device
Assignee: Permtek Inc
•
Filing: 1973-11-02
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Granted: 1975-12-02
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Expires: 1993-11-02
Abstract
Abstract Disclosed herein is a device for controllably dispensing a liquid substance and comprising a housing including wall means defining an airtight chamber having therein a sealed envelope containing the liquid substance to be dispensed and including wall means through which the liquid substance is permeable, outlet means communicating between the airtight chamber and the atmosphere, first valve means controlling air flow through the outlet means and operable between open and closed positions, inlet means communicating between the atmosphere and the airtight chamber, second valve means controlling air flow through the inlet means and operable between open and closed positions, and means for coordinated opening and closing of the first and second valve means.
Inventors
- 👤 Lucius D Watkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:53
CPC Classifications
A; A01; A01M; A01M1/00; A01M1/20; A01M1/2022; A01M1/2027; A01M1/2033; A01M1/2044; A61; A61L; A61L9/00; A61L9/015; A61L9/04; A61L9/12; A61L9/122; Y; Y10; Y10S; Y10S261/00; Y10S261/17
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
148 words
A device for controllably dispensing a liquid substance, said device comprising a housing including means defining an airtight chamber, a sealed envelope located in said chamber and containing the liquid substance to be dispensed, said envelope being formed of two plies of plastic material permeable to the liquid substance being dispensed, each of said plies including a substantially identical series of internested corrugations, said envelope including portions overlaid relative to each other, and a spacer interleaved between said overlaid portions, outlet means communicating between said airtight chamber and the atmosphere, first valve means controlling air flow through said outlet means and operable between open and closed positions, inlet means communicating between the atmosphere and said airtight chamber, second valve means controlling air flow through said inlet means and operable between open and closed positions and means for coordinated opening and closing of said first and second valve means.
Claim 2
Independent Claim
148 words
A device for controllably dispensing a liquid substance, said device comprising a housing including means defining an airtight chamber, a sealed envelope located in said chamber and containing the liquid substance to be dispensed, said envelope being formed of two plies of plastic material permeable to the liquid substance being dispensed, each of said plies including a substantially identical series of internested corrugations, said envelope including portions overlaid relative to each other, and a spacer interleaved between said overlaid portions, outlet means communicating between said airtight chamber and the atmosphere, first valve means controlling air flow through said outlet means and operable between open and closed positions, inlet means communicating between the atmosphere and said airtight chamber, second valve means controlling air flow through said inlet means and operable between open and closed positions and means for coordinated opening and closing of said first and second valve means.
Claim 3
Independent Claim
111 words
A device for controllably dispensing a liquid substance, said device comprising a housing including means defining a chamber, a cartridge located in said chamber and including a sealed envelope containing the liquid substance to be dispensed and formed of two plies of plastic material permeable to the liquid substance being dispensed, each of said plies including a substantially identical series of internested corrugations, said envelope including portions overlaid relative to each other, said cartridge further including a spacer interleaved between said overlaid portions, outlet means communicating between said chamber and the atmosphere, inlet means communicating between the atmosphere and said chamber, and motorized means for causing air flow through said chamber.
Claim 4
Independent Claim
111 words
A device for controllably dispensing a liquid substance, said device comprising a housing including means defining a chamber, a cartridge located in said chamber and including a sealed envelope containing the liquid substance to be dispensed and formed of two plies of plastic material permeable to the liquid substance being dispensed, each of said plies including a substantially identical series of internested corrugations, said envelope including portions overlaid relative to each other, said cartridge further including a spacer interleaved between said overlaid portions, outlet means communicating between said chamber and the atmosphere, inlet means communicating between the atmosphere and said chamber, and motorized means for causing air flow through said chamber.
Claim 5
Independent Claim
214 words
A device for controllably dispensing a liquid substance, said device comprising a housing including means defining an airtight chamber, a sealed envelope located in said chamber and containing the liquid substance to be dispensed, said envelope including wall means through which the liquid substance is permeable, inlet means communicating between the atmosphere and said airtight chamber, outlet means communicating between said airtight chamber and the atmosphere, means for causing air flow through said chamber including a motorized fan and a conduit communicating with said fan and with one of said inlet and outlet means, first valve means controlling air flow through said outlet means and operable between open and closed positions, second valve means controlling air flow through said inlet means and operable between open and closed positions, said first and second valve means comprising a plate extending in part between said conduit and said one of said inlet and outlet means and having inlet and outlet ports with the one of said ports associated with said one of said inlet and outlet means providing communication between said conduit and said one of said inlet and outlet means, and a shutter rotatable relative to said plate and including inlet and outlet slots movable relative to positions of registry with said inlet and outlet ports.
Claim 6
Independent Claim
214 words
A device for controllably dispensing a liquid substance, said device comprising a housing including means defining an airtight chamber, a sealed envelope located in said chamber and containing the liquid substance to be dispensed, said envelope including wall means through which the liquid substance is permeable, inlet means communicating between the atmosphere and said airtight chamber, outlet means communicating between said airtight chamber and the atmosphere, means for causing air flow through said chamber including a motorized fan and a conduit communicating with said fan and with one of said inlet and outlet means, first valve means controlling air flow through said outlet means and operable between open and closed positions, second valve means controlling air flow through said inlet means and operable between open and closed positions, said first and second valve means comprising a plate extending in part between said conduit and said one of said inlet and outlet means and having inlet and outlet ports with the one of said ports associated with said one of said inlet and outlet means providing communication between said conduit and said one of said inlet and outlet means, and a shutter rotatable relative to said plate and including inlet and outlet slots movable relative to positions of registry with said inlet and outlet ports.
Claim 7
Independent Claim
95 words
A device in accordance with 3 wherein said housing includes an outer wall, wherein said means defining said airtight chamber includes a wall portion, a shaft rotatably mounted by said wall portion and said outer wall, and wherein said plate is fixed against rotation relative to said wall portion, and wherein said wall portion includes inlet and outlet openings communicating with said airtight chamber and in regisTry with said inlet and outlet ports in said plate, and wherein said shutter is mounted on said shaft for rotation therewith between said plate and said wall portion.
Claim 8
Independent Claim
95 words
A device in accordance with 3 wherein said housing includes an outer wall, wherein said means defining said airtight chamber includes a wall portion, a shaft rotatably mounted by said wall portion and said outer wall, and wherein said plate is fixed against rotation relative to said wall portion, and wherein said wall portion includes inlet and outlet openings communicating with said airtight chamber and in regisTry with said inlet and outlet ports in said plate, and wherein said shutter is mounted on said shaft for rotation therewith between said plate and said wall portion.
Claim 9
Dependent Claim
46 words
A device in accordance with claim 4 wherein said shutter is movable axially on said shaft, and said plate is movable axially of said shaft, and further including means biasing said plate against said shutter, and biasing said plate and said shutter against said wall portion.
Claim 10
Independent Claim
141 words
A DEVICE FOR CONTROLLABLY DISPENSING A LIQUID SUBSTANCE, SAID DEVICE COMPRISING A HOUSING INCLUDING MEANS DEFINING AN AIRTIGHT CHAMBER, A SEALED ENVELOPE LOCATED IN SAID CHAMBER AND CONTAINING THE LIQUID SUBSTANCE TO BE DISPENSED, SAID ENVELOPE INCLUDING WALL MEANS THROUGH WHICH THE LIQUID SUBSTANCE IS PERMEABLE, OUTLET MEANS COMMUNICATING BETWEEN SAID AIRTIGHT CHAMBER AND THE ATMOSPHERE, FIRST VALVE MEANS CONTROLLING AIR FLOW THROUGH SAID OUTLET MEANS AND OPERABLE BETWEEN OPEN AND CLOSED POSITIONS, INLET MEANS COMMUNICATING BETWEEN THE ATMOSPHERE AND SAID AIRTIGHT CHAMBER, SECOND VALVE MEANS CONTROLLING AIR FLOW THROUGH SAID INLET MEANS AND OPERABLE BETWEEN OPEN AND CLOSED POSITIONS, MOTORIZED MEANS FOR CAUSING AIR FLOW THROUGH SAID CHAMBER, AND MEANS FOR COORDINATED OPENING AND CLOSING OF SAID FIRST SECOND VALVE MEANS AND FOR CONTROLLING OPERATION OF SAID MOTORIZED MEANS IN COORDINATION WITH THE OPENING AND CLOSING OF SAID VALVE MEANS.
Claim 11
Independent Claim
141 words
A DEVICE FOR CONTROLLABLY DISPENSING A LIQUID SUBSTANCE, SAID DEVICE COMPRISING A HOUSING INCLUDING MEANS DEFINING AN AIRTIGHT CHAMBER, A SEALED ENVELOPE LOCATED IN SAID CHAMBER AND CONTAINING THE LIQUID SUBSTANCE TO BE DISPENSED, SAID ENVELOPE INCLUDING WALL MEANS THROUGH WHICH THE LIQUID SUBSTANCE IS PERMEABLE, OUTLET MEANS COMMUNICATING BETWEEN SAID AIRTIGHT CHAMBER AND THE ATMOSPHERE, FIRST VALVE MEANS CONTROLLING AIR FLOW THROUGH SAID OUTLET MEANS AND OPERABLE BETWEEN OPEN AND CLOSED POSITIONS, INLET MEANS COMMUNICATING BETWEEN THE ATMOSPHERE AND SAID AIRTIGHT CHAMBER, SECOND VALVE MEANS CONTROLLING AIR FLOW THROUGH SAID INLET MEANS AND OPERABLE BETWEEN OPEN AND CLOSED POSITIONS, MOTORIZED MEANS FOR CAUSING AIR FLOW THROUGH SAID CHAMBER, AND MEANS FOR COORDINATED OPENING AND CLOSING OF SAID FIRST SECOND VALVE MEANS AND FOR CONTROLLING OPERATION OF SAID MOTORIZED MEANS IN COORDINATION WITH THE OPENING AND CLOSING OF SAID VALVE MEANS.
Claim 12
Dependent Claim
47 words
A device in accordance with claim 1 and further including a fan shroud supported by said housing a conduit communicating between said fan shroud and said outlet valve means, and means for affording entry of air into said conduit between said valve means and said fan shroud.
Claim 13
Dependent Claim
38 words
A device in accordance with claim 1 wherein said housing includes a wall portion and wherein said means defining said airtight chamber comprises said wall portion, and a removable container engaged in airtight engagement with said wall portion.
Claim 14
Dependent Claim
41 words
A device in accordance with claim 8 and further including a gasket between said wall portion and said container, and spring means engaging said container against said gasket so as to maintain said container in airtight engagement with said wall portion.
Claim 15
Dependent Claim
71 words
A device in accordance with claim 1 wherein said airtight chamber is formed by a wall portion and a container engaged by said wall portion and including a cartridge formed by said envelope and including a central tube communicating with said inlet means, and a gasket on said wall portion and engaged by said tube for insuring travel through said tube of air entering into said chamber through said inlet means.
Claim 16
Dependent Claim
96 words
A device in accordance with claim 10 wherein said container includes a bottom wall spaced from said wall portion and further including means for spacing said cartridge from said bottom wall to provide a plenum adjacent said bottom wall for radially outward movement of said air exiting from the adjacent end of said tube, and wherein said envelope includes spaced corrugations defining air passages affording flow of air from said plenum toward said wall portion, and wherein said gasket spaces said cartridge from said wall portion to define a second plenum communicating with said outlet means.
Claim 17
Independent Claim
94 words
A device for controllably dispensing a liquid substance, said device comprising a housing including means defining an airtight chamber, a sealed envelope located in said chamber and containing the liquid substance to be dispensed, said envelope including wall means through which the liquid substance is permeable, valve means operable between open and closed positions for controlling air flow relative to said chamber, motorized fan means for causing air flow through said chamber subject to the position of said valve means, and means for coordinated operation of said fan means and of said valve means.
Claim 18
Independent Claim
94 words
A device for controllably dispensing a liquid substance, said device comprising a housing including means defining an airtight chamber, a sealed envelope located in said chamber and containing the liquid substance to be dispensed, said envelope including wall means through which the liquid substance is permeable, valve means operable between open and closed positions for controlling air flow relative to said chamber, motorized fan means for causing air flow through said chamber subject to the position of said valve means, and means for coordinated operation of said fan means and of said valve means.
Claim 19
Dependent Claim
47 words
A device in accordance with claim 12 and further including a fan shroud supported by said housing, a conduit communicating between said fan shroud and said outlet valve means, and mEans for affording entry of air into said conduit between said valve means and said fan shroud.
Claim 20
Dependent Claim
38 words
A device in accordance with claim 13 wherein said housing includes a wall portion and wherein said means defining said airtight chamber comprises said wall portion, and a removable container engaged in airtight engagement with said wall portion.
Claim 21
Dependent Claim
41 words
A device in accordance with claim 14 and further including a gasket between said wall portion and said container, and spring means engaging said container against said gasket so as to maintain said container in airtight engagement with said wall portion.
Claim 22
Dependent Claim
71 words
A device in accordance with claim 12 wherein said airtight chamber is formed by a wall portion and a container engaged by said wall portion and including a cartridge formed by said envelope and including a central tube communicating with said inlet means, and a gasket on said wall portion and engaged by said tube for insuring travel through said tube of air entering into said chamber through said inlet means.
Claim 23
Dependent Claim
96 words
A device in accordance with claim 16 wherein said container includes a bottom wall spaced from said wall portion and further including means for spacing said cartridge from said bottom wall to provide a plenum adjacent said bottom wall for radially outward movement of said air exiting from the adjacent end of said tube, and wherein said envelope includes spaced corrugations defining air passages affording flow of air from said plenum toward said wall portion, and wherein said gasket spaces said cartridge from said wall portion to define a second plenum communicating with said outlet means.
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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) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |