Patent US4430221A successfully refreshed from Google Patents.
US4430221A
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Centrifuge sieve
Assignee: Sulzer Escher Wyss AG
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Filing: 1982-07-06
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Granted: 1984-02-07
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Expires: 2002-07-06
Abstract
Abstract In a centrifuge sieve drum wherein the inner surface of the drum is lined with a support arrangement which carries wear-resistant sieve or screen rods formed of a hard material, there is obtained a compensation of the different thermal expansions of the sieve or screen rods and the support arrangement in that, the sieve or screen rods are fixedly connected, in each case, as by riveting or by a threaded connection, at one location with the support arrangement of the sieve drum, whereas the rivets or threaded screws at other connection locations are moveable in a slot-shaped or elongate hole in the axial direction of the sieve drum.
Inventors
- 👤 Leonhard Spiewok
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:12
CPC Classifications
B; B04; B04B; B04B7/00; B04B7/08; B04B7/12; B04B7/16
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
109 words
A centrifuge sieve comprising: a centrifuge drum having an inner surface; a support arrangement bearing at the inner surface of said centrifuge drum; sieve rods secured at the support arrangement at least at two locations and extending in axial direction of the centrifuge drum; said sieve rods being formed of a wear-resistant hard material; connection means for fixedly connecting the sieve rods at one location with the support arrangement; and connection means provided at the other of said two locations between the sieve rods and the support arrangement in order to enable a mobility of the sieve rods in relation to the support arrangement only in the axial direction.
Claim 2
Dependent Claim
109 words
A centrifuge sieve comprising: a centrifuge drum having an inner surface; a support arrangement bearing at the inner surface of said centrifuge drum; sieve rods secured at the support arrangement at least at two locations and extending in axial direction of the centrifuge drum; said sieve rods being formed of a wear-resistant hard material; connection means for fixedly connecting the sieve rods at one location with the support arrangement; and connection means provided at the other of said two locations between the sieve rods and the support arrangement in order to enable a mobility of the sieve rods in relation to the support arrangement only in the axial direction.
Claim 3
Dependent Claim
14 words
The centrifuge sieve as defined in claim 1, wherein: said connection means comprise rivets.
Claim 4
Dependent Claim
14 words
The centrifuge sieve as defined in claim 1, wherein: said connection means comprise screws.
Claim 5
Dependent Claim
14 words
The centrifuge sieve as defined in claim 1, wherein: said connection means comprise pins.
Claim 6
Dependent Claim
14 words
The centrifuge sieve as defined in claim 1, wherein: said connection means comprise bolts.
Claim 7
Dependent Claim
62 words
The centrifuge sieve as defined in claim 1, wherein: each of said connection means comprise connection elements; one connection of each sieve rod with the support arrangement constitutes a fixedly seated connection whereas the other connection of each of said sieve rod with the support arrangement is established by the connection element thereof engaging into a slot extending in the axial direction.
Claim 8
Dependent Claim
27 words
The centrifuge sieve as defined in claim 6, wherein: said slots are provided in the support arrangement; and said connection elements are soldered to the sieve rods.
Claim 9
Dependent Claim
22 words
The centrifuge sieve as defined in claim 7, further including: transition layer means provided between the connection elements and the sieve rods.
Claim 10
Dependent Claim
18 words
The centrifuge sieve as defined in claim 1, wherein: said sieve rods are formed of a sintered material.
Claim 11
Dependent Claim
16 words
The centrifuge sieve as defined in claim 9, wherein: said sintered material is a sintered ceramic.
Claim 12
Dependent Claim
16 words
The centrifuge sieve as defined in claim 9, wherein: said sintered material is a sintered carbide.
Claim 13
Dependent Claim
16 words
The centrifuge sieve as defined in claim 9, wherein: said sintered material is a cast basalt.
Claim 14
Dependent Claim
15 words
The centrifuge sieve as defined in claim 9, wherein: said sintered material is tungsten carbide.
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) | 1987-02-06 | 1987-08-08 | 1988-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-02-06 | 1991-08-08 | 1992-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-02-06 | 1995-08-08 | 1996-02-07 | $7700.00 | Window Closed / Lapsed |