Patent US3696913A successfully refreshed from Google Patents.
US3696913A
Expired / Lapsed
US
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Extruder worms for extruding synthetic resins
Assignee: KraussMaffei Extrusion GmbH
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Filing: 1970-04-03
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Granted: 1972-10-10
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Expires: 1990-04-03
Abstract
Abstract An extruder worm comprises a plurality of co-axial hollow worm sections keyed to a shaft extending therethrough. The sections are urged together by a disc spring.
Inventors
- 👤 Dietmar Anders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:52
CPC Classifications
F; F16; F16B; F16B31/00; F16B31/04; B; B29; B29C; B29C48/00; B29C48/25; B29C48/256; B29C48/2564; B30; B30B; B30B11/00; B30B11/22; B30B11/24; B30B11/246; F16B21/00; B29C48/03; Y; Y10; Y10T; Y10T403/00; Y10T403/55; Y10T403/559
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
An extruder worm comprising a plurality of co-axial hollow worm sections, the inner surface of each said section being cylindrical and having a plurality of splines extending axially therealong, a hollow spindle, the outer surface of the spindle being cylindrical and having a plurality of splines extending axially therealong, said spindle extending through each said worm section, and the splines on said worm sections being engaged with the splines on said spindle, a hollow tie rod extending through said spindle, the inner surface of the spindle being radially spaced from the outer surface of the rod, first abutment means on the endmost of said sections at one end portion of said worm, the tie rod engaging the endmost of said sections at the other end portion of the worm, second abutment means on said tie rod, and spring means mounted on the tie rod and interposed between said first and second abutment means and creating an axial force between the worm sections in a sense to urge the sections relatively together.
Claim 2
Dependent Claim
171 words
An extruder worm comprising a plurality of co-axial hollow worm sections, the inner surface of each said section being cylindrical and having a plurality of splines extending axially therealong, a hollow spindle, the outer surface of the spindle being cylindrical and having a plurality of splines extending axially therealong, said spindle extending through each said worm section, and the splines on said worm sections being engaged with the splines on said spindle, a hollow tie rod extending through said spindle, the inner surface of the spindle being radially spaced from the outer surface of the rod, first abutment means on the endmost of said sections at one end portion of said worm, the tie rod engaging the endmost of said sections at the other end portion of the worm, second abutment means on said tie rod, and spring means mounted on the tie rod and interposed between said first and second abutment means and creating an axial force between the worm sections in a sense to urge the sections relatively together.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |