US3868239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sorption pump
Assignee: US Philips Corp
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Filing: 1973-04-19
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Granted: 1975-02-25
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Expires: 1993-04-19
Abstract
Abstract A sorption pumping device characterized in that a space to be evacuated can be connected to the sorption material successively at at least two different levels of the device.
Inventors
- 👤 Jan Visser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:16
CPC Classifications
B; B01; B01D; B01D53/00; B01D53/02; B01D53/04; B01D53/0407; B01D53/0446; F; F04; F04B; F04B37/00; F04B37/02; H; H01; H01J; H01J41/00; H01J41/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
117 words
In a sorption pumping device for connection to a space to be evacuated, including a housing defining therein a reservoir including an inlet passage connectible to said space, and a quantity of sorption material in said reservoir, the improvement in combination therewith wherein said material is situated at at least two relatively different levels, said device further comprising duct means extending through said reservoir and into the material and having spaced ports material for communication with said material at said different levels, and valve means in said inlet passage connected to said duct means for selectively interconnecting said space successively and directly with said different ports in said duct means and said material at said different levels.
Claim 2
Dependent Claim
117 words
In a sorption pumping device for connection to a space to be evacuated, including a housing defining therein a reservoir including an inlet passage connectible to said space, and a quantity of sorption material in said reservoir, the improvement in combination therewith wherein said material is situated at at least two relatively different levels, said device further comprising duct means extending through said reservoir and into the material and having spaced ports material for communication with said material at said different levels, and valve means in said inlet passage connected to said duct means for selectively interconnecting said space successively and directly with said different ports in said duct means and said material at said different levels.
Claim 3
Dependent Claim
119 words
Apparatus according to claim 1 which (when oriented vertically) has an upper part of the reservoir including said inlet duct and a lower part, and corresponding upper and lower levels of said material in the reservoir, said duct means being a tube having an upper part with a first of said ports therein for communicating with said inlet duct and a lower part with a second of said ports therein for communicating with said lower level material, whereby said valve means is operable successively to communicate the inlet duct with the lower level material through said tube bore via said first and second openings thereof and to communicate said inlet duct directly with said upper level of said material.
Claim 4
Dependent Claim
67 words
Apparatus according to claim 2 wherein said inlet duct defines a passage of first diameter, and said upper part of the tube is situated in said passage and has a smaller diameter with an annular space defined therebetween, and said valve means further comprises a diaphragm for sealing said annular space, and means for moving said diaphragm selectively to seal said annular space and to expose same.
Claim 5
Dependent Claim
34 words
Apparatus according to claim 3 wherein said diaphragm is secured to said tube, and said valve further comprises means for moving said tube and diaphragm axially for selectively sealing and unsealing said annular space.
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) | 1978-02-24 | 1978-08-26 | 1979-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-24 | 1982-08-26 | 1983-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-24 | 1986-08-26 | 1987-02-25 | $7700.00 | Window Closed / Lapsed |