Patent US3822720A successfully refreshed from Google Patents.
US3822720A
Expired / Lapsed
US
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Flow control assembly
Assignee: Individual
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Filing: 1971-03-04
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Granted: 1974-07-09
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Expires: 1991-03-04
Abstract
Abstract An integral one piece flow control assembly is described having a hollow cylindrical main body defining a passage therethrough and a pair of lip members extending inwardly and longitudinally of said main body to a terminal end for controlling the flow through the passage. The lip members have a peripheral portion connected to the inner surface of the body and a central body portion extending from the peripheral portion to a terminal end portion defining a normally closed slit opening. Each lip member is curved inwardly toward the axis of the main body. Pressure in one direction presses the slit closed, and pressure in the opposite direction opens the slit. A pair of such flow control assemblies oriented in the same direction within a passage provide an inexpensive pump.
Inventors
- 👤 A Souza
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:32
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/08; F16; F16K; F16K15/00; F16K15/14; F16K15/1401; F16K15/144; F16K15/147; F16K15/1472; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7879; Y10T137/788; Y10T137/7882
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
251 words
A flow control assembly comprising: a hollow cylindrical main body defining a flow passage therewithin and a pair of lip members extending inwardly and longitudinally of said main body to a terminal end for controlling flow through such passage, each lip member having a peripheral portion connected to the inner surface of said main body member around substantially 180* of the inner surface of said main body and joined to the other lip member forming a complete seal around said main body and a central body portion extending from said peripheral portion longitudinally of said main body to the lip member terminal end and defining a slit opening there with the other lip member, each lip member curved inwardly toward the axis of said main body between said peripheral portion and said slit opening with the curve of greater radius than the radius of the main body, at least part of the lip member central body portions projecting longitudinally within said main body to said terminal end free from said main body member, said lip members joined together except for a slit like, normally closed opening on a line intersecting the axis of said main body in a plane normal to said axis, said lip member central portion having a thickness greater than the thickness of the adjacent peripheral and terminal end portions, whereby fluid pressure against the concave side of said lip members presses said lip members sealing said slit closed and pressure in the opposite direction opens said slit.
Claim 2
Dependent Claim
251 words
A flow control assembly comprising: a hollow cylindrical main body defining a flow passage therewithin and a pair of lip members extending inwardly and longitudinally of said main body to a terminal end for controlling flow through such passage, each lip member having a peripheral portion connected to the inner surface of said main body member around substantially 180* of the inner surface of said main body and joined to the other lip member forming a complete seal around said main body and a central body portion extending from said peripheral portion longitudinally of said main body to the lip member terminal end and defining a slit opening there with the other lip member, each lip member curved inwardly toward the axis of said main body between said peripheral portion and said slit opening with the curve of greater radius than the radius of the main body, at least part of the lip member central body portions projecting longitudinally within said main body to said terminal end free from said main body member, said lip members joined together except for a slit like, normally closed opening on a line intersecting the axis of said main body in a plane normal to said axis, said lip member central portion having a thickness greater than the thickness of the adjacent peripheral and terminal end portions, whereby fluid pressure against the concave side of said lip members presses said lip members sealing said slit closed and pressure in the opposite direction opens said slit.
Claim 3
Dependent Claim
206 words
An integral one piece flow control assembly of plastic at least partially flexible comprising: a hollow cylindrical main body defining a flow passage therewithin and a pair of lip members extending inwardly and longitudinally of said main body to a terminal end for controlling flow through such passage, each lip member having a peripheral portion connected to the inner suface of said main body member around substantially 180* of the inner surface of said main body and joined to the other lip member forming a complete seal around said main body, a central body portion extending from said peripheral portion longitudinally of said main body and, a flat end portion extending to the lip member terminal end from said central body portion where said peripheral portions join, the central body portion curved inwardly toward the axis of said main body, and having a radius Greater than the radius of said main body, said flat end portions of lesser width than the diameter of said main body and joined to one another along their sides except for a slit like, normally closed opening at the terminal end, each lip central body portion having a thickness greater than the thickness of the adjacent peripheral end flat end portions.
Claim 4
Dependent Claim
206 words
An integral one piece flow control assembly of plastic at least partially flexible comprising: a hollow cylindrical main body defining a flow passage therewithin and a pair of lip members extending inwardly and longitudinally of said main body to a terminal end for controlling flow through such passage, each lip member having a peripheral portion connected to the inner suface of said main body member around substantially 180* of the inner surface of said main body and joined to the other lip member forming a complete seal around said main body, a central body portion extending from said peripheral portion longitudinally of said main body and, a flat end portion extending to the lip member terminal end from said central body portion where said peripheral portions join, the central body portion curved inwardly toward the axis of said main body, and having a radius Greater than the radius of said main body, said flat end portions of lesser width than the diameter of said main body and joined to one another along their sides except for a slit like, normally closed opening at the terminal end, each lip central body portion having a thickness greater than the thickness of the adjacent peripheral end flat end portions.
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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) | 1977-07-08 | 1978-01-07 | 1978-07-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-08 | 1982-01-07 | 1982-07-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-08 | 1986-01-07 | 1986-07-09 | $7700.00 | Window Closed / Lapsed |