Patent US4630115A successfully refreshed from Google Patents.
US3862780A
Expired / Lapsed
US
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Sluice type feeding device
Assignee: Spribag AG
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Filing: 1974-07-25
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Granted: 1975-01-28
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Expires: 1994-07-25
Abstract
Abstract A gravity feed device for a pneumatic material distributing system. The material is sluiced through a rubber hose by pinch rollers which move successively downward along the hose. The volume of the hose section between successive upper and lower rollers is increased by delaying the downward travel of the upper roller relative to the downward travel of the lower roller. Such volume increase protects sluiced granular material against crushing and jamming.
Inventors
- 👤 Georg Senn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:13
CPC Classifications
F; F04; F04B; F04B43/00; F04B43/12; F04B43/1223; B; B65; B65G; B65G53/00; B65G53/34; B65G53/40; B65G53/46; B65G53/4675
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
66 words
A sluice type feeding device for pneumatic material distributing systems comprising at least one compressible conveying hose, a plurality of successive pinch elements cooperable with said hose to define a material confining chamber therein between an upper and lower of said pinch elements, and drive means for said pinch elements operable to increase the volume of said chamber as said pinch elements move along said hose.
Claim 2
Dependent Claim
66 words
A sluice type feeding device for pneumatic material distributing systems comprising at least one compressible conveying hose, a plurality of successive pinch elements cooperable with said hose to define a material confining chamber therein between an upper and lower of said pinch elements, and drive means for said pinch elements operable to increase the volume of said chamber as said pinch elements move along said hose.
Claim 3
Dependent Claim
20 words
A sluice type feeding device as set forth in claim 1 wherein said conveying hose has a downwardly flaring configuration.
Claim 4
Dependent Claim
67 words
A sluice type feeding device as set forth in claim 1 wherein a plurality of rollers forming said pinch elements are mounted on a pair of endless chain drives for movement along said conveying hose, and wherein tensioning means for said chain drives are operable to elongate one pair of chain stretches of said drives while simultaneously shortening the other pair of chain stretches of said drives.
Claim 5
Dependent Claim
104 words
A sluice type feeding device as set forth in claim 3 wherein said tensioning means for said chain drives comprise a double armed lever system which is rockable selectively in opposite directions about a fixed pivot element, rocking of said lever system in one direction being effective to elongate one pair of chain stretches of said drives while simultaneously shortening the other pair of chain stretches of said drives, and rocking of said lever system in the other direction being effective to shorten said one pair of Chain stretches of said drives while simultaneously elongating said other pair of chain stretches of said drives.
Claim 6
Dependent Claim
28 words
A sluice type feeding device as set forth in claim 4 and further comprising cam means operable by said chain drives to rock said double armed lever system.
Claim 7
Dependent Claim
20 words
A sluice type feeding device as set forth in claim 3 and further comprising guide tracks for said pinch rollers.
Claim 8
Dependent Claim
35 words
A sluice type feeding device as set forth in claim 1 and further comprising pressure equalizing means operatively interposed between said material confining chamber of said conveying hose and an associated pneumatic material distributing system.
Claim 9
Dependent Claim
38 words
A sluice type feeding device as set forth in claim 1, wherein said conveying hose comprises a tubular, elastic core and a lengthwise fabric reinforcement thereof, and an outer crosswise and lengthwise reinforced fabric hose surrounding said core.
References Cited (Backward Citations)
US3523000A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-27 | 1978-07-29 | 1979-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-27 | 1982-07-29 | 1983-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-27 | 1986-07-29 | 1987-01-28 | $7700.00 | Window Closed / Lapsed |