Patent US5106490A successfully refreshed from Google Patents.
US5106490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mobile material screening apparatus
Assignee: Individual
•
Filing: 1989-10-06
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Granted: 1992-04-21
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Expires: 2009-10-06
Abstract
Abstract A mobile material screening apparatus includes a sloped screen box, a housing, a fifth wheel coupling, an engine and a pair of wheels fixed to the housing. Two hydraulic rams lift the apparatus and wheels off the ground and four extendable legs support it off the ground. A conveyor located underneath the screen box delivers fully screened material up over the fifth wheel coupling. A second conveyor located at the side of the apparatus removes second grade screened material. A third conveyor removes reject material which comes down a chute.
Inventors
- 👤 John McDonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:40
CPC Classifications
B; B07; B07B; B07B1/00; B07B1/005; B07B1/46; B07B2201/00; B07B2201/04
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
176 words
A mobile material screening apparatus comprising a sloped screening box mounted on an upper part of the apparatus on which material to be screened may be deposited, the screening box being sloped from a high side of the apparatus to a low side and having an open side at the low side of the apparatus so that reject material may pass over the screening box; wheels located at a rear part of the apparatus to enable the apparatus to be moved; means for raising the wheels from ground contact; coupling means located at a front part of the apparatus to enable the apparatus to be coupled to a prime mover; first conveyor means located beneath the screening box and extending from within the apparatus to the front of the apparatus to convey screened material from within the apparatus to the front thereof, wherein said first conveyor means conveys said screened material from within the apparatus to beyond and above the coupling means; and means for directing screened material from the screening box to the conveyor means.
Claim 2
Dependent Claim
176 words
A mobile material screening apparatus comprising a sloped screening box mounted on an upper part of the apparatus on which material to be screened may be deposited, the screening box being sloped from a high side of the apparatus to a low side and having an open side at the low side of the apparatus so that reject material may pass over the screening box; wheels located at a rear part of the apparatus to enable the apparatus to be moved; means for raising the wheels from ground contact; coupling means located at a front part of the apparatus to enable the apparatus to be coupled to a prime mover; first conveyor means located beneath the screening box and extending from within the apparatus to the front of the apparatus to convey screened material from within the apparatus to the front thereof, wherein said first conveyor means conveys said screened material from within the apparatus to beyond and above the coupling means; and means for directing screened material from the screening box to the conveyor means.
Claim 3
Dependent Claim
96 words
A mobile screening apparatus as claimed in claim 1, in which the screening box comprises a first and a second screening frame, the first screening frame located above and spaced apart from the second screening frame thereby enabling three grades of screened material to be obtained from the apparatus, namely reject material, single screened material and double screened material, the double screened material being conveyed by said first conveyor means, and a second conveyor means is provided to convey the single screened material; said second conveyor means being provided at the low side of the apparatus.
Claim 4
Dependent Claim
31 words
A mobile screening apparatus as claimed in claim 2, in which said second conveyor means has means for removably attaching the second conveyor means to the low side of the apparatus.
Claim 5
Dependent Claim
30 words
A mobile screening apparatus as claimed in claim 3, in which said second conveyor means has means for removably mounting the second conveyor means above said screening box for transportation.
Claim 6
Dependent Claim
53 words
A mobile screening apparatus as claimed in claim 4, in which a third conveyor means is removably attached to the low side of the apparatus and is removably mounted adjacent said second conveyor means above the screening box for transportation, said third conveyor means being used to convey reject material from the apparatus.
Claim 7
Dependent Claim
38 words
A mobile screening apparatus as claimed in claim 2, in which the first screening frame and the second screening frame comprise removable screening magazines, each magazine comprising a screen deck having a screen mesh of the required size.
Claim 8
Dependent Claim
55 words
A mobile screening apparatus as claimed in claim 1, in which said wheels are fixed relative to the apparatus and said means for raising the wheels comprises at least two hydraulic rams mounted at a lower edge of the apparatus and operable to engage the ground and thereby lift the apparatus together with said wheels.
Claim 9
Dependent Claim
39 words
A mobile screening apparatus as claimed in claim 7, in which one of said hydraulic rams is mounted at the front of the apparatus and the other of said hydraulic rams is mounted at the rear of the apparatus.
Claim 10
Dependent Claim
28 words
A mobile screening apparatus as claimed in claim 8, in which extendable legs are provided at corners of the apparatus, the extendable legs supporting the apparatus during operation.
Claim 11
Dependent Claim
24 words
A mobile screening apparatus as claimed in in claim 1, including means for adjusting the angle of the slope of said sloped screening box.
Claim 12
Dependent Claim
38 words
A mobile screening apparatus as claimed in in claim 1, in which the screening box is agitated by means of an eccentrically mounted rotatable shaft, the shaft comprising a hollow pipe over a substantial portion of its length.
Claim 13
Dependent Claim
80 words
A mobile screening apparatus as claimed in claim 11, in which the rotatable shaft is selectively rotatable in a first direction or in a second direction; rotation in either the first direction of rotation tending to keep the material on the screening box longer than the second direction of rotation, and the second direction of rotation tending to move the material on the screening box down the slope of the screening box more quickly than the first direction of rotation.
Claim 14
Dependent Claim
161 words
A mobile material screening apparatus comprising a sloped screening box mounted on an upper part of the apparatus on which material to be screened may be deposited, the screening box being sloped from a high side of the apparatus to a low side and having an open side at the low side of the apparatus so that reject material may pass over the screening box; wheels located at a rear part of the apparatus to enable the apparatus to be moved; means for raising the wheels from ground contact; coupling means located at a front part of the apparatus to enable the apparatus to be coupled to a prime mover; first conveyor means located beneath the screening box and extending from within the apparatus through one end of the apparatus to convey screened material from within the apparatus to outside the apparatus and beyond the coupling means; and means for directing screened material from the screening box to the conveyor means.
Claim 15
Dependent Claim
161 words
A mobile material screening apparatus comprising a sloped screening box mounted on an upper part of the apparatus on which material to be screened may be deposited, the screening box being sloped from a high side of the apparatus to a low side and having an open side at the low side of the apparatus so that reject material may pass over the screening box; wheels located at a rear part of the apparatus to enable the apparatus to be moved; means for raising the wheels from ground contact; coupling means located at a front part of the apparatus to enable the apparatus to be coupled to a prime mover; first conveyor means located beneath the screening box and extending from within the apparatus through one end of the apparatus to convey screened material from within the apparatus to outside the apparatus and beyond the coupling means; and means for directing screened material from the screening box to the conveyor means.
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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) | 1995-04-21 | 1995-10-21 | 1996-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-04-21 | 1999-10-21 | 2000-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-04-21 | 2003-10-21 | 2004-04-21 | $7700.00 | Window Closed / Lapsed |