Patent US3909014A successfully refreshed from Google Patents.
US3909014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal
Assignee: Nestec SA
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Filing: 1973-10-16
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Granted: 1975-09-30
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Expires: 1993-10-16
Abstract
Abstract Seal for the passage of a movable part into a germ-free enclosure comprising a sleeve surrounding this movable part. Said sleeve is provided with a hot fluid circulation through an inlet, an outlet and a by-pass outlet. During normal running the inlet and by-pass outlet are open and the outlet closed.
Inventors
- 👤 Willi Loliger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:34
CPC Classifications
B; B67; B67C; B67C3/00; B67C3/02; B67C3/22; B67C3/28; B67C3/001; F; F16; F16J; F16J15/00; F16J15/16; F16J15/40; F16K; F16K41/00; F16K41/003; Y; Y10; Y10S; Y10S277/00; Y10S277/93; Y10T; Y10T137/00; Y10T137/4238; Y10T137/4245; Y10T137/4266
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
149 words
In combination with a reciprocable movable part, a seal for the passage of said reciprocable movable part into a germ-free enclosure, said seal comprising a sleeve surrounding said movable part, and seal means between said movable part and said sleeve for preventing escape of gas from the ends of said sleeve, said sleeve being provided at its farthest end from said enclosure with a gaseous fluid inlet, at its nearest end from said enclosure with an outlet and between said inlet and said outlet with a by-pass outlet, said inlet, outlet and by-pass outlet each being provided with a valve, said by-pass outlet valve being open during normal running when said outlet valve is closed and in which the distance between said gaseous fluid inlet and said bypass outlet and the distance between said by-pass outlet and said outlet each is greater than the stroke of said movable part.
Claim 2
Dependent Claim
149 words
In combination with a reciprocable movable part, a seal for the passage of said reciprocable movable part into a germ-free enclosure, said seal comprising a sleeve surrounding said movable part, and seal means between said movable part and said sleeve for preventing escape of gas from the ends of said sleeve, said sleeve being provided at its farthest end from said enclosure with a gaseous fluid inlet, at its nearest end from said enclosure with an outlet and between said inlet and said outlet with a by-pass outlet, said inlet, outlet and by-pass outlet each being provided with a valve, said by-pass outlet valve being open during normal running when said outlet valve is closed and in which the distance between said gaseous fluid inlet and said bypass outlet and the distance between said by-pass outlet and said outlet each is greater than the stroke of said movable part.
Claim 3
Dependent Claim
22 words
Seal according to claim 1, in which said outlet valve and said by-pass outlet valve are combined into a common three-way valve.
Claim 4
Dependent Claim
35 words
Seal according to claim 1, in which the movable part is cylindrical and in which the distance between said outlet and said by-pass outlet is greater than 5 times the diameter of said movable part.
Claim 5
Dependent Claim
114 words
In combination a valve having a vertical reciprocally mounted control rod, a sleeve surrounding said rod, a gaseous fluid inlet at an end of said sleeve farthest from said valve for introducing steam into said sleeve to selectively heat said valve, an outlet at an end of said sleeve nearest said valve for exhausting steam from said sleeve, a by-pass outlet in said sleeve between said inlet and said outlet for exhausting steam from said sleeve, a valve in each of said inlet, outlet and by-pass outlet, and a packing at each end of said sleeve between said rod and said sleeve for preventing escape of gaseous fluid from the ends of said sleeve.
Claim 6
Dependent Claim
114 words
In combination a valve having a vertical reciprocally mounted control rod, a sleeve surrounding said rod, a gaseous fluid inlet at an end of said sleeve farthest from said valve for introducing steam into said sleeve to selectively heat said valve, an outlet at an end of said sleeve nearest said valve for exhausting steam from said sleeve, a by-pass outlet in said sleeve between said inlet and said outlet for exhausting steam from said sleeve, a valve in each of said inlet, outlet and by-pass outlet, and a packing at each end of said sleeve between said rod and said sleeve for preventing escape of gaseous fluid from the ends of said sleeve.
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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |