Patent JPS5228338A successfully refreshed from Google Patents.
US3674147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Check valve
Assignee: EMD Millipore Corp
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Filing: 1971-02-08
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Granted: 1972-07-04
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Expires: 1991-02-08
Abstract
Abstract A check valve adapted for use in one end of a filter cartridge to permit steam sterilization downstream of the cartridge without disintegrating the filter material. The valve has a generally cylindrical housing, a cap adapted to fit within the housing and an O-ring adapted to fit around said cap under tension. The housing has a shoulder extending inwardly from its inside circumferential surface. The cap having an upper, generally cylindrical portion with a diameter less than the inside diameter of the housing at the shoulder, a circumferential recess adapted to house said O-ring out of contact with the inside surface of said housing and a lower generally cylindrical shelf with a diameter greater than the inside diameter of the housing at the shoulder, the recess being located between said upper and lower portions.
Inventors
- 👤 Bernard Danti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:40
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/46; A; A61; A61L; A61L2/00; A61L2/26; A61L2/28; F16K1/465; F16K15/00; F16K15/02; F16K15/06; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7837; Y10T137/7854; Y10T137/7856
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
130 words
A check valve comprising a generally cylindrical housing, a cap adapted to fit within said housing and a sealing means adapted to fit around said cap under tension, said housing having a shoulder extending inwardly from its inside circumferential surface, said cap having an upper, generally cylindrical portion with a diameter less than the inside diameter of the housing at the shoulder, a circumferential recess adapted to house said sealing means out of contact with the inside surface of said housing and a lower generally cylindrical shelf with a diameter greater than the inside diameter of the housing at the shoulder, said recess being located between said upper and lower portions and said sealing means being movable within said housing from said upper generally cylindrical portion to said circumferential recess.
Claim 2
Dependent Claim
130 words
A check valve comprising a generally cylindrical housing, a cap adapted to fit within said housing and a sealing means adapted to fit around said cap under tension, said housing having a shoulder extending inwardly from its inside circumferential surface, said cap having an upper, generally cylindrical portion with a diameter less than the inside diameter of the housing at the shoulder, a circumferential recess adapted to house said sealing means out of contact with the inside surface of said housing and a lower generally cylindrical shelf with a diameter greater than the inside diameter of the housing at the shoulder, said recess being located between said upper and lower portions and said sealing means being movable within said housing from said upper generally cylindrical portion to said circumferential recess.
Claim 3
Dependent Claim
19 words
The valve of claim 1 having a circumferential beveled shoulder between the recess and the upper generally cylindrical portion.
Claim 4
Dependent Claim
22 words
The valve of claim 1 having means for retaining the cap adjacent the housing when said sealing means is within sAid recess.
Claim 5
Independent Claim
167 words
An apparatus comprising a tubular filter cartridge, and a check valve, said check valve comprising a generally cylindrical housing, a cap adapted to fit within said housing and a sealing means adapted to fit around said cap under tension, said housing having a shoulder extending inwardly from its inside circumferential surface, said cap having an upper, generally cylindrical portion with a diameter less than the inside diameter of the housing at the shoulder, a circumferential recess adapted to house said sealing means out of contact with the inside surface of said housing and a lower generally cylindrical shelf with a diameter greater than the inside diameter of the housing at the shoulder, said recess located between said upper and lower portions, said sealing means being movable within said housing from said upper generally cylindrical portion to said circumferential recess, said housing having means for confining one end of said cartridge in sealed relationship and to provide fluid communication between the interiors of said cartridge and said housing.
Claim 6
Independent Claim
167 words
An apparatus comprising a tubular filter cartridge, and a check valve, said check valve comprising a generally cylindrical housing, a cap adapted to fit within said housing and a sealing means adapted to fit around said cap under tension, said housing having a shoulder extending inwardly from its inside circumferential surface, said cap having an upper, generally cylindrical portion with a diameter less than the inside diameter of the housing at the shoulder, a circumferential recess adapted to house said sealing means out of contact with the inside surface of said housing and a lower generally cylindrical shelf with a diameter greater than the inside diameter of the housing at the shoulder, said recess located between said upper and lower portions, said sealing means being movable within said housing from said upper generally cylindrical portion to said circumferential recess, said housing having means for confining one end of said cartridge in sealed relationship and to provide fluid communication between the interiors of said cartridge and said housing.
Claim 7
Dependent Claim
19 words
The apparatus of claim 4 having a circumferential beveled shoulder between the recess and the upper generally cylindrical portion.
Claim 8
Dependent Claim
22 words
The apparatus of claim 4 having means for retaining the cap adjacent the housing when said sealing means is within said recess.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |