US3590429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Casings for double conveyor worms for extruders of synthetic materials
Assignee: Schloemann AG
•
Filing: 1968-11-19
•
Granted: 1971-07-06
•
Expires: 1988-11-19
Abstract
Abstract The wear-resisting lining may consist of an alloy having a basis of boron with additions of nickel and silicon, or a basis of nickel and cobalt.
Inventors
- 👤 Wilhelm Bammert
- 👤 Walter Wimmers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:25
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/08; F04C2/082; F04C2/086; B; B29; B29C; B29C48/00; B29C48/25; B29C48/36; B29C48/50; B29C48/68; B29C48/6801; B29C48/682; B30; B30B; B30B11/00; B30B11/22; B30B11/224; B29C48/03; F04C2240/00; F04C2240/80; F04C2240/802
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
31 words
A casing for a double-worm conveyor as claimed in claim 1, the means for releasably uniting the twO casing members being clamping screws arranged on both sides of the cylindrical cavities.
Claim 2
Dependent Claim
37 words
The casing for a double-worm conveyor as claimed in claim 1, the peripheral surfaces of the casing members being of semicircular curvature, and the casing further comprising a steel ring shrunk on to the said semicircular surfaces.
Claim 3
Dependent Claim
29 words
The casing for a double-worm conveyor as claimed in claim 1, further comprising a steel sleeve interposed between the lining and the adjacent surface of the casing member body.
Claim 4
Dependent Claim
33 words
The casing for a double-worm conveyor as claimed in claim 3, in which groove means constituting ducts for the passage of tempering fluid are provided between the casing members and the shrunk-on ring.
Claim 5
Dependent Claim
41 words
The casing for a double-worm conveyor as claimed in claim 3, the internal peripheral surface of the shrunk-on ring being formed with grooves cooperating with the adjacent surfaces of the casing members to form ducts for the passage of tempering fluid.
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) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |