Patent US3791556A successfully refreshed from Google Patents.
US3791556A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid metering device
Assignee: Individual
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Filing: 1971-12-13
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Granted: 1974-02-12
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Expires: 1991-12-13
Abstract
Abstract An apparatus for metering and delivering a pre-selected quantity of a fluid comprising a container for holding a relatively large quantity of the fluid, a vertically extending tube positioned within the container and having an open upper end adapted to lie above the fluid level and an open lower end adapted to lie below the fluid level, and a piston translatably mounted within the tube. The piston has a passageway extending therethrough which is connected via an extensible tube to a delivery spigot attached to the exterior of the container. In use, the piston is initially translated to a position below the open lower end such that the fluid in the container passes into the tube. The piston is then raised to a selected elevation such that the fluid in the tube is retained and lifted causing the excess thereof to spill from the open upper end back into the container. This results in a measured quantity of the fluid carried above the piston, which may then be released through the delivery spigot.
Inventors
- 👤 N Tarter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:43
CPC Classifications
G; G01; G01F; G01F11/00; G01F11/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
269 words
An apparatus for metering and delivering a variable and preselected quantity of a fluid comprising a container adapted to hold a relatively large quantity of said fluid and including a delivery orifice, a vertically extending tube disposed within said container, said tube including a peripheral wall defining a central enclosure and upper and lower ends, means defining a lower opening in said tube adjacent said lower end, and means defining an upper opening in said tube adjacent said upper end, said lower opening being adapted to lie below the level of the fluid in said container and said upper opening being adapted to lie above the level of the fluid in said container, a piston translatably mounted within said tube, said piston being configured to sealingly engage said tube peripheral wall and including a passageway extending vertically therethrough, means for selectively translating said piston between a lower position beneath said lower opening wherein the fluid in said container is free to pass through said lower opening and into said central enclosure to reach a level corresponding to that of the fluid in said container, and a variable raised position above said lower opening wherein the fluid above said piston is retained in said enclosure and the upper level of the fluid in said enclosure corresponds to said upper opening such that the quantity of fluid in said enclosure is dependent upon the elevation of said piston at said raised position, and valve means operatively connected between said piston passageway and said delivery orifice for selectively releasing the fluid carried above said piston and delivering the same through said orifice.
Claim 2
Independent Claim
269 words
An apparatus for metering and delivering a variable and preselected quantity of a fluid comprising a container adapted to hold a relatively large quantity of said fluid and including a delivery orifice, a vertically extending tube disposed within said container, said tube including a peripheral wall defining a central enclosure and upper and lower ends, means defining a lower opening in said tube adjacent said lower end, and means defining an upper opening in said tube adjacent said upper end, said lower opening being adapted to lie below the level of the fluid in said container and said upper opening being adapted to lie above the level of the fluid in said container, a piston translatably mounted within said tube, said piston being configured to sealingly engage said tube peripheral wall and including a passageway extending vertically therethrough, means for selectively translating said piston between a lower position beneath said lower opening wherein the fluid in said container is free to pass through said lower opening and into said central enclosure to reach a level corresponding to that of the fluid in said container, and a variable raised position above said lower opening wherein the fluid above said piston is retained in said enclosure and the upper level of the fluid in said enclosure corresponds to said upper opening such that the quantity of fluid in said enclosure is dependent upon the elevation of said piston at said raised position, and valve means operatively connected between said piston passageway and said delivery orifice for selectively releasing the fluid carried above said piston and delivering the same through said orifice.
Claim 3
Dependent Claim
56 words
The apparatus as defined in claim 1 wherein said means for selectively translating said piston includes a vertically extending rack connected to said piston, a pinion rotatably mounted about a fixed axis for operative engagement with said rack, and means carried externally of said container for rotating said pinion to thereby raise or lower said piston.
Claim 4
Dependent Claim
57 words
The apparatus as defined in claim 2 wherein said means for rotating said pinion includes a rotatable dial coaxially connected to said pinion, and a pointer carried by said container in association with said dial, said dial having indicia thereon correlated to the elevation of said piston and thus the quantity of fluid retained in said enclosure.
Claim 5
Dependent Claim
35 words
The apparatus as defined in claim 3 wherein said means for selectively translating said piston further includes stop members carried within said tube for limiting the lower position and maximum raised position of said piston.
Claim 6
Dependent Claim
33 words
The apparatus as defined in claim 3 wherein said valve means includes an extensible tube connected between said piston passageway and delivery orifice, and a manually operable valve carried externally of the container.
Claim 7
Dependent Claim
24 words
The apparatus as defined in claim 5 wherein said container includes indicia means for indicating desIred minimum and maximum fluid levels in said container.
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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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |