Patent US3643679A successfully refreshed from Google Patents.
US3643679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Equipment designed to regulate the flow of, preferably, a sterile liquid and a dishwashing liquid or a sterilizing agent
Assignee: Tetra Pak AB
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Filing: 1970-05-26
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Granted: 1972-02-22
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Expires: 1990-05-26
Abstract
Abstract A valve structure for controlling the flow of a liquid in a pipe for filling packages and for controlling the flow of a liquid for cleaning the pipe whereby suitable separation is obtained and vapor seals are employed.
Inventors
- 👤 Jan Ingvar Hansson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:42
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/32; F16K1/34; F16K1/44; F16K1/443; F16K1/446; A; A61; A61L; A61L2/00; A61L2/26; B; B08; B08B; B08B9/00; Y; Y10; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/4266; Y10T137/8593; Y10T137/86928; Y10T137/87016; Y10T137/8704; Y10T137/87571; Y10T137/87676; Y10T137/87684; Y10T137/87692
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
178 words
A valve structure for controlling the flow of a first liquid through a pipe and for controlling the flow of a cleaning fluid through the pipe when the first liquid is stopped, comprising, a pipe, a first valve for controlling the flow of the first liquid into said pipe, a second double-acting valve for controlling the flow of the cleaning fluid into said pipe, said second valve when open to the cleaning liquid being closed to the first liquid to supplement the closure of said first valve in serial disposition therewith, means for actuating said first and second valves whereby when said first valve is open said second valve is open to the first liquid and is closed to the cleaning liquid and when said first valve is closed to the first liquid said second valve is open to the cleaning liquid, said first valve and said second valve forming a space therebetween in the latter valving position which is sealed from said pipe and the cleaning fluid and means for flushing said space with a flushing agent.
Claim 2
Dependent Claim
178 words
A valve structure for controlling the flow of a first liquid through a pipe and for controlling the flow of a cleaning fluid through the pipe when the first liquid is stopped, comprising, a pipe, a first valve for controlling the flow of the first liquid into said pipe, a second double-acting valve for controlling the flow of the cleaning fluid into said pipe, said second valve when open to the cleaning liquid being closed to the first liquid to supplement the closure of said first valve in serial disposition therewith, means for actuating said first and second valves whereby when said first valve is open said second valve is open to the first liquid and is closed to the cleaning liquid and when said first valve is closed to the first liquid said second valve is open to the cleaning liquid, said first valve and said second valve forming a space therebetween in the latter valving position which is sealed from said pipe and the cleaning fluid and means for flushing said space with a flushing agent.
Claim 3
Dependent Claim
32 words
A valve structure as claimed in claim 1 wherein said valve actuating means comprises concentric valve spindles, the inner spindle actuating said first valve and the outer spindle actuating said second valve.
Claim 4
Dependent Claim
23 words
A valve structure as claimed in claim 2 wherein said valve actuating means further comprises means for relatively displacing said concentric valve spindles.
Claim 5
Dependent Claim
25 words
A valve structure as claimed in claim 2 wherein said inner spindle is provided with an axial duct for supplying flushing agent to said space.
Claim 6
Dependent Claim
48 words
A valve structure as claimed in claim 4 and further comprising a housing, and wherein said concentric valve spindles pass through the wall of said housing and said concentric valve spindles are spaced from each other and the outer spindle is spaced from the wall of said housing.
Claim 7
Dependent Claim
28 words
A valve structure as claImed in claim 5 wherein said concentric spindles and the wall of the housing are provided with seals spaced longitudinally along the axes thereof.
Claim 8
Dependent Claim
33 words
A valve structure as claimed in claim 6 wherein the said spindles are provided with ducts providing communication through the wall of the inner spindle and through the wall of the outer spindle.
Claim 9
Dependent Claim
20 words
A valve structure as claimed in claim 7 wherein the ducts and said seals provide passages for the flushing agent.
Claim 10
Dependent Claim
31 words
A valve structure as claimed in claim 8 and further comprising means for relatively displacing said concentric valve spindles whereby different passageways are established by said seals and ducts provided therein.
Claim 11
Dependent Claim
49 words
A valve structure as claimed in claim 9 wherein passageways are provided for passage of the flushing agent to the space between said first valve and said second valve when said first valve is closed to the first liquid and the second valve is open to the cleaning liquid.
Claim 12
Dependent Claim
50 words
A valve structure as claimed in claim 10 and further comprising means for limiting the passage of the flushing agent to the space between the inner and outer valve spindles when said first valve is open to the first liquid and the second valve is closed to the cleaning liquid.
Claim 13
Dependent Claim
42 words
A valve structure as claimed in claim 1 and further comprising a housing, said valve actuating means passing through the wall of said housing and means for surrounding said valve actuating means where it passes through said housing with the flushing agent.
Claim 14
Dependent Claim
29 words
A valve structure as claimed in claim 1 and further comprising valve seats in said pipe for said first valve and for both positions of said second double-acting valve.
Claim 15
Dependent Claim
34 words
A valve structure as claimed in claim 1 and further comprising means for applying an additional independent force to close said first valve to stop the flow of the first liquid into said pipe.
Claim 16
Dependent Claim
34 words
A valve structure as claimed in claim 1 and further comprising spring means for urging the second valve to close off the cleaning liquid when the first valve is open to the first liquid.
Claim 17
Dependent Claim
34 words
A valve structure as claimed in claim 1 and further comprising spring means for urging the first valve to close off the first liquid when the second valve is open to the cleaning liquid.
Claim 18
Dependent Claim
36 words
A valve structure as claimed in claim 1 wherein said first valve when open to the first liquid is in sealed engagement with the second valve when it is seated to close off the cleaning liquid.
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) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |