US4363725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for removing gravel from excavated soil
Assignee: Morita Kouken KK
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Filing: 1981-08-14
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Granted: 1982-12-14
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Expires: 2001-08-14
Abstract
Abstract An apparatus for removing stone and gravel from excavated soil by vibration. The apparatus is particularly useful for operation at the foot of a volcano, mountainous district or the like. Characteristic features of the apparatus are that it is self-propelled by means of endless tracks and the excavated soil is separated into stone, gravel and soil with the aid of a sieving means and the separated stone and gravel are discharged from the apparatus by way of a conveyor, while the separated fine soil is conveyed by way of another conveyor and then is scattered rearward by means of a scattering device to be piled up on the working ground.
Inventors
- 👤 Takeshi Morita
- 👤 Kiyoshi Morita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:51
CPC Classifications
A; A01; A01B; A01B77/00; B; B07; B07B; B07B1/00; B07B1/005; B07B1/12; B07B1/42; B07B1/46; B07B1/4609; B07B1/4636; B07B1/469; B07B13/00; B07B13/14; B07B13/16; E; E02; E02F; E02F7/00; E02F7/06
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
105 words
An apparatus for removing gravel from excavated soil comprising a chassis having endless tracks; a frame structure mounted upright on said chassis; a sieving means resiliently supported on the chassis at a predetermined inclination within said frame structure, a loading port at the upper part thereof, and vibration motors operatively secured thereto to vibrate the same; and two inclined conveyors arranged below the sieving means, one of said conveyors serving to convey stone and gravel in the forward direction and the other of said conveyors serving to convey soil in the rearward direction, the lower ends of said conveyors being located adjacent to one another.
Claim 2
Independent Claim
105 words
An apparatus for removing gravel from excavated soil comprising a chassis having endless tracks; a frame structure mounted upright on said chassis; a sieving means resiliently supported on the chassis at a predetermined inclination within said frame structure, a loading port at the upper part thereof, and vibration motors operatively secured thereto to vibrate the same; and two inclined conveyors arranged below the sieving means, one of said conveyors serving to convey stone and gravel in the forward direction and the other of said conveyors serving to convey soil in the rearward direction, the lower ends of said conveyors being located adjacent to one another.
Claim 3
Dependent Claim
21 words
An apparatus as defined in claim 1, wherein said sieving means has a bottom which is constructed of a perforated member.
Claim 4
Dependent Claim
24 words
An apparatus as defined in claim 2, wherein said perforated member for the bottom of the sieving means comprises a sheet of wire mesh.
Claim 5
Dependent Claim
22 words
An apparatus as defined in claim 2, wherein said perforated member for the bottom of the sieving means comprises a perforated plate.
Claim 6
Dependent Claim
26 words
An apparatus as defined in claim 2, wherein a mesh size adjusting means is provided for the perforated member for the bottom of the sieving means.
Claim 7
Dependent Claim
30 words
An apparatus as defined in claim 5, wherein said mesh size adjusting means for the perforated member comprises two layers of perforated plates which are slidable relative to one another.
Claim 8
Dependent Claim
66 words
An apparatus as defined in claim 1, wherein said sieving means has a bottom which is constructed of a plurality of longitudinally extending partitions arranged in an equally spaced relation in the lateral direction and a number of longitudinal extending elastic wire rods located below said partitions in such a manner as to divide the space between the adjacent partitions into the required number of sections.
Claim 9
Dependent Claim
39 words
An apparatus as defined in claim 1, further comprising means for resiliently supported said sieving means on the chassis, said supporting means comprising a spring which is arranged between the side plate of the sieving means and the chassis.
Claim 10
Dependent Claim
19 words
An apparatus as defined in claim 1, further comprising means for adjusting the inclination angle of the sieving means.
Claim 11
Dependent Claim
63 words
An apparatus as defined in claim 9, wherein said means for adjusting the inclination angle of the sieving means comprises a spring mounted on the chassis and resiliently supporting the rear portion of the sieving means, and a slide plate connected to a hydraulic cylinder which moves said slide plate in the vertical direction slidably supporting the front portion of the sieving means.
Claim 12
Dependent Claim
66 words
An apparatus as defined in claim 10, wherein said means for adjusting the inclination angle of the sieving means further comprises a spring which is arranged between the front end of the inclined sieving means and the lower part of the slide plate, said spring serving to thrust the sieving means rearward so as to prevent the latter from protruding forward when adjusting the inclination angle.
Claim 13
Dependent Claim
47 words
An apparatus as defined in claim 9, 10, or 11, comprising a spring resiliently supporting said sieving means at the front end thereof, said spring being mounted on a supporting rod which swings in the vertical direction in accordance with the adjusted inclination of the sieving means.
Claim 14
Dependent Claim
23 words
An apparatus as defined in claim 12, wherein said supporting rod is pivotally and slidably mounted at one end thereof to said chassis.
Claim 15
Dependent Claim
42 words
An apparatus as defined in claim 1, further comprising a scattering device in the vicinity of the rear end of the conveyor for conveying the sieved soil so as to receive the sieved soil from the same and then scatter it rearwardly.
Claim 16
Dependent Claim
45 words
An apparatus as defined in claim 14, wherein said scattering device comprises a plurality of radially extending blades which are driven by a motor and a guide frame which covers the bottom face of said blades and a front half portion of the scattering device.
Claim 17
Dependent Claim
23 words
An apparatus as defined in claim 14, wherein means for adjusting the mounting angle of the scattering device is provided for the latter.
Claim 18
Dependent Claim
64 words
An apparatus as defined in claim 16, wherein said means for adjusting the mounting angle of the scattering device is constructed such that the scattering device is pivotally supported by means of arm rods which are firmly secured to the side frame of the conveyor and said arm rods and the scattering device are adjustably connected by way of turnbuckles which are spanned therebetween.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-13 | 1986-06-14 | 1986-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-13 | 1990-06-14 | 1990-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-13 | 1994-06-14 | 1994-12-14 | $7700.00 | Window Closed / Lapsed |