US3216271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hollow screwthread
Assignee: Bayer AG
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Filing: 1962-12-19
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Granted: 1965-11-09
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Expires: 1982-12-19
Abstract
No abstract record available.
Inventors
- 👤 Erdmenger Rudolf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:28
CPC Classifications
F; F16; F16H; F16H55/00; F16H55/02; F16H25/00; F16H25/18; F16H25/20; F16H25/24; F28; F28F; F28F5/00; F28F5/06; Y; Y10; Y10T; Y10T74/00; Y10T74/18; Y10T74/18568; Y10T74/18576
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
AT LEAST TWO INTERMESHED HOLLOW SCREWTHREADS IN SURFACE CONTACT THROUGHOUT THE INTERMESHED LENGTH, THE AXES OF SAID THREADS BEING DISPOSED PARALLEL TO EACH OTHER, MEANS FOR ROTATING THE THREADS IN THE SAME DIRECTION AND AT THE SAME ANGULAR SPEED ABOUT THEIR RESPECTIVE AXES, EACH CROSS-SECTION PERPENDICULAR TO THE AXIS OF EACH SCREWTHREAD AT ALL POINTS ALONG THE LENGTH OF THE AXIS BEING A CIRCLE ECCENTRIC RELATIVE TO THE AXIS, THE RADIUS OF SUCH CIRCLES BEING EQUAL TO HALF THE SPACING OF THE SAID AXES PROVIDING SAID SURFACE CONTACT THROUGHOUT ROTATION OF THE SCREWS, AND THE CREST OF EACH SCREWTHREAD BEING ARCUATE.
Claim 2
Dependent Claim
101 words
AT LEAST TWO INTERMESHED HOLLOW SCREWTHREADS IN SURFACE CONTACT THROUGHOUT THE INTERMESHED LENGTH, THE AXES OF SAID THREADS BEING DISPOSED PARALLEL TO EACH OTHER, MEANS FOR ROTATING THE THREADS IN THE SAME DIRECTION AND AT THE SAME ANGULAR SPEED ABOUT THEIR RESPECTIVE AXES, EACH CROSS-SECTION PERPENDICULAR TO THE AXIS OF EACH SCREWTHREAD AT ALL POINTS ALONG THE LENGTH OF THE AXIS BEING A CIRCLE ECCENTRIC RELATIVE TO THE AXIS, THE RADIUS OF SUCH CIRCLES BEING EQUAL TO HALF THE SPACING OF THE SAID AXES PROVIDING SAID SURFACE CONTACT THROUGHOUT ROTATION OF THE SCREWS, AND THE CREST OF EACH SCREWTHREAD BEING ARCUATE.
References Cited (Backward Citations)
US2321185A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |