Patent US2396282A successfully refreshed from Google Patents.
Patent US3658262A successfully refreshed from Google Patents.
US3658262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sewage sludge and garbage grinder
Assignee: Zimpro Passavant Inc
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Filing: 1970-10-23
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Granted: 1972-04-25
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Expires: 1990-10-23
Abstract
Abstract A sewage sludge grinder comprising a housing, a shaft in the housing, a motor for driving the shaft, a chamber in the housing surrounding the shaft, an outlet and an inlet in the chamber, said shaft being free-ended within said housing and mounting at its terminal portion an assembly comprising an impeller which faces the inlet and tends to move sludge therefrom outwardly radially a set of cutters, and a grid-plate provided with peripheral through slots, the peripheral edge of the impeller cooperating with certain surfaces on said cutters, and the forward face of the grid-plate adjacent said slots cooperating with different surfaces on said cutters, the sludge flowing through the impeller and grid-plate assembly toward the outlet.
Inventors
- 👤 Walter Burant Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:21
CPC Classifications
B; B02; B02C; B02C18/00; B02C18/0084; B02C18/0092
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
101 words
Grinding apparatus comprising a motor driven shaft, a housing therefor, an outlet for the housing, an impeller and grid-plate on the shaft, an inlet for the housing facing the impeller, and a cutter on the housing, said cutter having a pair of shearing surfaces at an angle to each other, one of said surfaces cooperating with the impeller at the upstream side of the flow of sludge from the inlet to reduce particles in the sludge, the other cutter surface cooperating with the peripheral edge area of the grid-plate, further reducing sludge particles downstream of the flow as regards the impeller.
Claim 2
Dependent Claim
101 words
Grinding apparatus comprising a motor driven shaft, a housing therefor, an outlet for the housing, an impeller and grid-plate on the shaft, an inlet for the housing facing the impeller, and a cutter on the housing, said cutter having a pair of shearing surfaces at an angle to each other, one of said surfaces cooperating with the impeller at the upstream side of the flow of sludge from the inlet to reduce particles in the sludge, the other cutter surface cooperating with the peripheral edge area of the grid-plate, further reducing sludge particles downstream of the flow as regards the impeller.
Claim 3
Dependent Claim
18 words
Grinding apparatus of claim 1 wherein the cutter is located at the periphery of the impeller and grid-plate.
Claim 4
Dependent Claim
34 words
Grinding apparatus of claim 1 wherein the cutter is located at the periphery of the impeller and grid-plate and the impeller includes radial arms tending to force the sludge outwardly radially toward the cutter.
Claim 5
Dependent Claim
27 words
The grinding apparatus of claim 1 wherein said impeller tends to move the sludge radially outwardly, said grid-plate being provided with peripheral slots for passing the sludge.
Claim 6
Dependent Claim
41 words
The grinding apparatus of claim 1 wherein said impeller tends to move the sludge radially outwardly, said grid-plate being provided with peripheral slots for passing the sludge and said cooperative grinding with respect to the respective shearing surface of said cutter.
Claim 7
Dependent Claim
49 words
The grinding apparatus of claim 1 wherein said impeller tends to move the sludge radially outwardly, said grid-plate being provided with peripheral slots for passing the sludge, said slots being inclined with respect to the axis of said shaft and of said grid-plate and passing completely through the grid-plate.
Claim 8
Dependent Claim
15 words
Grinding apparatus of claim 1 including means exterior of said housing for mounting said cutter.
Claim 9
Dependent Claim
21 words
Grinding apparatus of claim 1 including means exterior of said housing for mounting said cutter, and means for adjusting said cutter.
Claim 10
Dependent Claim
26 words
Grinding apparatus of claim 1 including means exterior of said housing for mounting said cutter, and for removing and replacing the same from outside the housing.
Claim 11
Dependent Claim
158 words
Grinding apparatus for sludge comprising a housiNg forming a chamber, a shaft in said housing within the chamber, an inlet for the sludge, a rotary impeller and grid-plate assembly mounted on said shaft, a plurality of generally radially arranged circumferentially spaced cutters mounted on said housing and projecting inwardly thereof, each cutter having a pair of surfaces at angles to each other, the impeller including radial arms tending to force the sludge radially outwardly toward the cutters, respective surfaces of each cutter cooperating with the peripheral edge of said impeller arms providing a shearing and grinding action therewith, the grid-plate having a series of slots therein at the edge thereof, the slots extending through the plate, and the other respective surfaces of the cutters having a shearing and grinding cooperation with respect to the forward face of the grid-plate in the region of said slots, and an outlet, the ground sludge passing through the slots to the outlet.
Claim 12
Dependent Claim
158 words
Grinding apparatus for sludge comprising a housiNg forming a chamber, a shaft in said housing within the chamber, an inlet for the sludge, a rotary impeller and grid-plate assembly mounted on said shaft, a plurality of generally radially arranged circumferentially spaced cutters mounted on said housing and projecting inwardly thereof, each cutter having a pair of surfaces at angles to each other, the impeller including radial arms tending to force the sludge radially outwardly toward the cutters, respective surfaces of each cutter cooperating with the peripheral edge of said impeller arms providing a shearing and grinding action therewith, the grid-plate having a series of slots therein at the edge thereof, the slots extending through the plate, and the other respective surfaces of the cutters having a shearing and grinding cooperation with respect to the forward face of the grid-plate in the region of said slots, and an outlet, the ground sludge passing through the slots to the outlet.
Claim 13
Dependent Claim
20 words
The grinding apparatus of claim 10 wherein the slots are inclined relative to the axis of the shaft and grid-plate.
Claim 14
Dependent Claim
37 words
The grinding apparatus of claim 10 wherein the shaft is generally vertical and the inlet is at the bottom of the chamber, the impeller being above the inlet so that heavy objects fail to engage the impeller.
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) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |