Patent US3561605A successfully refreshed from Google Patents.
US3561605A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-cleaning tubular screen
Assignee: SIGNAL ENVIRONMENTAL SYSTEMS Inc A CORP OF
•
Filing: 1968-12-30
•
Granted: 1971-02-09
•
Expires: 1988-12-30
Abstract
Abstract A self-cleaning tubular screen adapted for dewatering or classifying particulates which embodies a slotted construction to provide a self-cleaning V-Slot that enlarges in the outward radial direction. The support rods for the tubular screen are located on the inner periphery of the tubular screen and attached to the wide face of wedge-shaped wire so as to preclude any interference with the slot opening. In a preferred arrangement the support rods are spiralled in order to enhance or improve particulate flow longitudinally through the screen.
Inventors
- 👤 David M Likness
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:57
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/02; E21B43/08; E21B43/088; B; B01; B01D; B01D29/00; B01D29/11; B01D29/111; B01D29/13; B01D29/15; B01D33/00; B01D33/06; B01D33/067; B01D33/073; B01D33/27; B01D33/275; B01D29/44; B01D29/48
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
60 words
The tubular screen of claim 1 further characterized in that the cross section of said support rods are such that the dimension of the outer and inner sides of the cross section thereof is to be substantially smaller than the dimension of the two adjacent sides of said cross section whereby to facilitate particulate flow, longitudinally, through said tubular screen.
References Cited (Backward Citations)
DE477621C
Cited
US765182A
Cited
US866560A
Cited
GB218036A
Cited
US2046458A
Cited
US2342913A
Cited
US2690265A
Cited
DE969759C
Cited
US2942730A
Cited
US3229815A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |