US3645291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cryogenic filling valve
Assignee: NITROCHILL Ltd
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Filing: 1969-05-02
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Granted: 1972-02-29
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Expires: 1989-05-02
Abstract
Abstract The invention relates to a valve suitable for use as a cryogenic filling valve for high-pressure gas cylinders, which valve comprises a body adapted to be connected in a gastight manner to an inlet of a gas cylinder; a first passageway extending through the body and adapted to receive a probe so as to permit liquid to pass from the probe into the cylinder to which the body is connected; first valve means for opening and closing said first passageway; a second passageway extending through the body for permitting gas to be drawn off from the cylinder; and second valve means for controlling the rate at which gas passes through the second passageway. The valve enables liquefied gas to be charged to the gas cylinder and also serves to control the delivery from the cylinder of gas produced by evaporation of the liquefied gas so charged. In a preferred embodiment, an inner vessel is provided in the gas cylinder to receive the liquefied gas charged thereto and to allow evaporated gas to pass into the remainder of the cylinder.
Inventors
- 👤 Peter E Finney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:19
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/30; F16K1/301; F16K1/302; F17; F17C; F17C13/00; F17C13/04; F17C5/00; F17C5/02; F17C2205/00; F17C2205/03; F17C2205/0302; F17C2205/0323; F17C2205/0382; F17C2205/0388; F17C2205/0394; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/86292; Y10T137/86324; Y10T137/86332
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
209 words
A cryogenic filling valve for high-pressure gas cylinders, comprising: a valve body having an upper face and a cylinder face; a first passageway having a straight bore extending through said valve body; first valve means opening and closing said first passageway; a second passageway extending through said valve body, said second passageway comprising first and second portions, said first portion having a larger diameter than said second portion, said second portion extending into said valve body from said cylinder face, said first portion extending from said second portion to said upper face of said valve body; a valve member entirely received within said first portion, including an adjustable needle valve, mounted in said first portion, said needle valve being seated in said second portion where said second portion enters said first portion, said needle valve being operable to adjust the opening of said second portion into said first portion; and a third passageway extending into said valve body from said upper face, said third passageway being in communication with said first portion, wherein when said needle valve is in an open position, a passageway extends from the upper face of said valve body to the cylinder face thereof through said third passageway, said first portion and said second portion.
Claim 2
Dependent Claim
209 words
A cryogenic filling valve for high-pressure gas cylinders, comprising: a valve body having an upper face and a cylinder face; a first passageway having a straight bore extending through said valve body; first valve means opening and closing said first passageway; a second passageway extending through said valve body, said second passageway comprising first and second portions, said first portion having a larger diameter than said second portion, said second portion extending into said valve body from said cylinder face, said first portion extending from said second portion to said upper face of said valve body; a valve member entirely received within said first portion, including an adjustable needle valve, mounted in said first portion, said needle valve being seated in said second portion where said second portion enters said first portion, said needle valve being operable to adjust the opening of said second portion into said first portion; and a third passageway extending into said valve body from said upper face, said third passageway being in communication with said first portion, wherein when said needle valve is in an open position, a passageway extends from the upper face of said valve body to the cylinder face thereof through said third passageway, said first portion and said second portion.
Claim 3
Dependent Claim
56 words
A cryogenic filling valve according to claim 1, wherein said third passageway comprises: one portion extending into said valve body from said upper face substantially parallel with said second passageway and another portion extending diagonally from a portion of said first portion in communication with said second portion to said one portion of said third passageway.
Claim 4
Dependent Claim
27 words
A valve as claimed in claim 1 wherein the first valve means is adapted to be operated by movement of a probe inserted in the first passageway.
Claim 5
Dependent Claim
29 words
A valve as claimed in claim 3 wherein the first valve means comprises a pivotally mounted closure member adapted to seat against the cylinder end of the firsT passageway.
Claim 6
Dependent Claim
17 words
A valve as claimed in claim 4 wherein the closure member is biassed into its closed position.
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |