US3150818A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vacuum pump
Assignee: Ortech Corp
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Filing: 1962-04-30
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Granted: 1964-09-29
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Expires: 1982-04-30
Abstract
No abstract record available.
Inventors
- 👤 Wilhelm W B Schumacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:01
CPC Classifications
H; H01; H01J; H01J9/00; H01J9/38; F; F04; F04B; F04B37/00; F04B37/06; F04B37/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
270 words
A VACUUM PUMP COMPRISING A HOUSING DEFINING A FORE VACUUM COMPARTMENT AND A HIGH VACUUM COMPARTMENT, SAID HIGH VACUUM COMPARTMENT BEING ADAPTED TO BE ARRANGED IN FLUID-FLOW RELATIONSHIP WITH A RECIPIENT, FIRST AND SECOND LAYERS EACH COMPRISING LATERALLY SPACED APART SETS OF FIRST AND SECOND BARS AND POSITIONED BETWEEN SAID HIGH VACUUM AND FORE VACUUM COMPARTMENTS, SAID FIRST BARS OF SAID FIRST LAYER BEING POSITIONED WITH SURFACES THEREOF ADJACENT SAID HIGH VACUUM COMPARTMENT, SAID SECOND BARS OF SAID FIRST LAYER BEING SHIELDED FROM SAID HIGH VACUUM COMPARTMENT BY SAID FIRST BARS OF SAID FIRST LAYER AND BEING POSITIONED CLOSELY ADJACENT SAID FIRST BARS OF SAID FIRST LAYER, SAID SECOND LAYER BEING POSITIONED ON THE SIDE OF SAID FIRST LAYER REMOTE FROM SAID HIGH VACUUM COMPARTMENT, SAID SECOND BARS OF SAID SECOND LAYER BEING SHIELDED FROM SAID HIGH VACUUM COMPARTMENT BY SAID FIRST BARS OF SAID SECOND LAYER, SAID SECOND BARS OF SAID SECOND LAYER BEING POSITIONED CLOSELY ADJACENT SAID FIRST BARS OF SAID SECOND LAYER, SAID FIRST AND SECOND LAYERS BEING LONGITUDINALLY SPACED APART FROM EACH OTHER BY AN AMOUNT SUBSTANTILALY EQUAL TO THE LATERAL SPACING BETWEEN SAID SETS OF FIRST AND SECOND BARS, SAID SETS OF SAID FIRST AND SECOND BARS OF SAID SECOND LAYER BEING OFFSET LATERALLY WITH RESPECT TO SAID SETS OF SAID FIRST AND SECOND BARS OF SAID FIRST LAYER AND BEING POSITIONED INTERMEDIATE ADJACENT ONES OF SAID SETS OF SAID FIRST AND SECOND BARS OF SAID FIRST LAYER, AND MEANS FOR MAINTAINING A TEMPERATURE DIFFERENTIAL BETWEEN SAID FIRST BARS AND SAID SECOND BARS WITH SAID FIRST BARS AT A LOWER TEMPERATURE THAN SAID SECOND BARS.
Claim 2
Dependent Claim
270 words
A VACUUM PUMP COMPRISING A HOUSING DEFINING A FORE VACUUM COMPARTMENT AND A HIGH VACUUM COMPARTMENT, SAID HIGH VACUUM COMPARTMENT BEING ADAPTED TO BE ARRANGED IN FLUID-FLOW RELATIONSHIP WITH A RECIPIENT, FIRST AND SECOND LAYERS EACH COMPRISING LATERALLY SPACED APART SETS OF FIRST AND SECOND BARS AND POSITIONED BETWEEN SAID HIGH VACUUM AND FORE VACUUM COMPARTMENTS, SAID FIRST BARS OF SAID FIRST LAYER BEING POSITIONED WITH SURFACES THEREOF ADJACENT SAID HIGH VACUUM COMPARTMENT, SAID SECOND BARS OF SAID FIRST LAYER BEING SHIELDED FROM SAID HIGH VACUUM COMPARTMENT BY SAID FIRST BARS OF SAID FIRST LAYER AND BEING POSITIONED CLOSELY ADJACENT SAID FIRST BARS OF SAID FIRST LAYER, SAID SECOND LAYER BEING POSITIONED ON THE SIDE OF SAID FIRST LAYER REMOTE FROM SAID HIGH VACUUM COMPARTMENT, SAID SECOND BARS OF SAID SECOND LAYER BEING SHIELDED FROM SAID HIGH VACUUM COMPARTMENT BY SAID FIRST BARS OF SAID SECOND LAYER, SAID SECOND BARS OF SAID SECOND LAYER BEING POSITIONED CLOSELY ADJACENT SAID FIRST BARS OF SAID SECOND LAYER, SAID FIRST AND SECOND LAYERS BEING LONGITUDINALLY SPACED APART FROM EACH OTHER BY AN AMOUNT SUBSTANTILALY EQUAL TO THE LATERAL SPACING BETWEEN SAID SETS OF FIRST AND SECOND BARS, SAID SETS OF SAID FIRST AND SECOND BARS OF SAID SECOND LAYER BEING OFFSET LATERALLY WITH RESPECT TO SAID SETS OF SAID FIRST AND SECOND BARS OF SAID FIRST LAYER AND BEING POSITIONED INTERMEDIATE ADJACENT ONES OF SAID SETS OF SAID FIRST AND SECOND BARS OF SAID FIRST LAYER, AND MEANS FOR MAINTAINING A TEMPERATURE DIFFERENTIAL BETWEEN SAID FIRST BARS AND SAID SECOND BARS WITH SAID FIRST BARS AT A LOWER TEMPERATURE THAN SAID SECOND BARS.
References Cited (Backward Citations)
US1564287A
Cited
US1564288A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-29 | 1968-03-30 | 1968-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-29 | 1972-03-30 | 1972-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-29 | 1976-03-30 | 1976-09-29 | $7700.00 | Window Closed / Lapsed |