US4375491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roll-up fold-up sluice apparatus
Assignee: Individual
•
Filing: 1981-08-31
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Granted: 1983-03-01
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Expires: 2001-08-31
Abstract
Abstract A roll-up fold-up sluice apparatus for use in separating sediment by water flow. The apparatus includes an elongate flexible mat having formed, in a central portion therein, a plurality of longitudinally spaced riffles which extend laterally with respect to the mat's long axis, and which define associated ridges and channels on the mat's upper and lower sides, respectively. The riffles are longitudinally spaced by increasing increments progressing in one longitudinal direction in the mat and are sized and shaped to accommodate a regular ridge-to-channel nesting when the mat is rolled up in that direction. A pair of flaps joined to opposite sides of the mat's central portion can be folded between folded-up positions to form the sides for the apparatus, and folded-down positions to enable rolling up.
Inventors
- 👤 Steven Honig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:25
CPC Classifications
B; B03; B03B; B03B5/00; B03B5/02; B03B5/26; Y; Y10; Y10S; Y10S428/00; Y10S428/906; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/2457; Y10T428/24628; Y10T428/24669; Y10T428/24694; Y10T428/24777
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
154 words
Unitary roll-up fold-up sluice apparatus for use in separating sediment by water flow comprising an elongate flexible mat having upper and lower sides, means distributed along a central portion in said mat forming plural longitudinally spaced riffles which extend substantially laterally with respect to the mat's long axis and between the central portion's opposed longitudinal edges, each riffle defining an elongate ridge on said upper side and an elongate channel on said lower side, said riffles being dimensioned and longitudinally spaced for accommodating a regular ridge-to-channel nesting when said mat is rolled up in one longitudinal direction relative to the mat's long axis, with the riffles being spaced longitudinally by increasing increments progressing in said one longitudinal direction along said central portion, and longitudinally extending flaps joined integrally with said edges for folding between upwardly extending positions to form sides in the apparatus, and outwardly extending positions to accommodate rolling up of the mat.
Claim 2
Dependent Claim
154 words
Unitary roll-up fold-up sluice apparatus for use in separating sediment by water flow comprising an elongate flexible mat having upper and lower sides, means distributed along a central portion in said mat forming plural longitudinally spaced riffles which extend substantially laterally with respect to the mat's long axis and between the central portion's opposed longitudinal edges, each riffle defining an elongate ridge on said upper side and an elongate channel on said lower side, said riffles being dimensioned and longitudinally spaced for accommodating a regular ridge-to-channel nesting when said mat is rolled up in one longitudinal direction relative to the mat's long axis, with the riffles being spaced longitudinally by increasing increments progressing in said one longitudinal direction along said central portion, and longitudinally extending flaps joined integrally with said edges for folding between upwardly extending positions to form sides in the apparatus, and outwardly extending positions to accommodate rolling up of the mat.
Claim 3
Dependent Claim
23 words
The apparatus of claim 1, wherein said riffles include end and side walls which converge, respectively, progressing upwardly away from said upper side.
Claim 4
Dependent Claim
30 words
The apparatus of claim 1, wherein said riffles are open ended, and include rectilinear cross sections of progressively larger sizes progressing along said central portion in said one longitudinal direction.
Claim 5
Dependent Claim
17 words
The apparatus of claim 1, wherein said riffles have increasing lateral dimensions progressing in said one direction.
Claim 6
Dependent Claim
34 words
The apparatus of claim 2, wherein said flaps are angled in cross section to include flap expanses which abut associated end walls in said riffles when said flaps are in their upwardly extending positions.
Claim 7
Dependent Claim
40 words
The apparatus of claim 1, which further includes means defining slits in said flaps, and tab means joined to said riffles and projecting laterally outwardly therefrom adapted to engage said slits for holding said flaps in their upwardly extending positions.
References Cited (Backward Citations)
US4215488A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-28 | 1986-08-30 | 1987-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-28 | 1990-08-30 | 1991-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-28 | 1994-08-30 | 1995-03-01 | $7700.00 | Window Closed / Lapsed |