US3664503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastic sieve bottom
Assignee: Stahlgruber Otto Gruber GmbH and Co
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Filing: 1969-08-22
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Granted: 1972-05-23
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Expires: 1989-08-22
Abstract
Abstract An elastic sieve bottom includes abutting elastic sieve bottom sections with spaced sieve apertures therethrough, and a reinforcing mesh received in grooves in portions of the sieve bottom between the apertures.
Inventors
- 👤 Alois Felden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:18
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/46; B07B1/4609; B07B1/4627; B07B1/4645; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49718; Y10T29/49721; Y10T29/4973; Y10T428/00; Y10T428/24; Y10T428/24273
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
145 words
In an elastic sieve bottom comprising a plurality of abutting sieve sections, each of said sieve sections being plate shaped with a flat uncovered upper charging side for receiving fragmented material and a flat lower bottom side, each of said sections being of an elastic material and being provided with spaced sieve apertures to sift the fragmented material, a plurality of said sections cooperating together to comprise the active elements of the sieve, said flat lower bottom sides of said sections being provided with grooves between said apertures, each groove extending completely across its section and being aligned with a corresponding groove in its abutting section, reinforcing means in said aligned grooves whereby said sections are mounted on said reinforcing means and prevented from shifting out of abutting relationship with respect to each other, and the walls of each groove extending below said reinforcing means.
Claim 2
Dependent Claim
145 words
In an elastic sieve bottom comprising a plurality of abutting sieve sections, each of said sieve sections being plate shaped with a flat uncovered upper charging side for receiving fragmented material and a flat lower bottom side, each of said sections being of an elastic material and being provided with spaced sieve apertures to sift the fragmented material, a plurality of said sections cooperating together to comprise the active elements of the sieve, said flat lower bottom sides of said sections being provided with grooves between said apertures, each groove extending completely across its section and being aligned with a corresponding groove in its abutting section, reinforcing means in said aligned grooves whereby said sections are mounted on said reinforcing means and prevented from shifting out of abutting relationship with respect to each other, and the walls of each groove extending below said reinforcing means.
Claim 3
Dependent Claim
31 words
An elastic sieve bottom as set forth in claim 1 wherein each of said sections has integral lips over said grooves extending toward each other to confine said reinforcing means therein.
Claim 4
Dependent Claim
30 words
A sieve bottom as set forth in claim 1 including sealing means for closing said grooves on the side of said sections remote from the charging side of the sieve.
Claim 5
Dependent Claim
52 words
A sieve bottom as set forth in claim 3 wherein said sealing means are lips integral with its section and closing its respective groove, and said lips being laterally displaceable when placed on said reinforcing element to permit said element to enter its respective groove by spreading and thereafter closing said lips.
Claim 6
Dependent Claim
121 words
An elastic sieve bottom as set forth in claim 1 wherein said grooves includes a first groove in each section extending completely thereacross and a second groove in each section extending completely thereacross and intersecting said first groove, each first groove of each section being aligned with a respective first groove in an abutting section and each second groove in each section being aligned with a respective second groove in an abutting section, said reinforcing element being of mesh construction with a plurality of first wires and a plurality of second wires intersecting said first wires, each of said first wires being disposed in said aligned first grooves, and each of said second wires being disposed in said aligned second grooves.
Claim 7
Dependent Claim
39 words
An elastic sieve bottom as set forth in claim 5 including security patches attached to at least some of the intersections of the grooves on the bottom side of said sections remote from the charging side of the sieve.
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) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |