US3746150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bulk material handling apparatus
Assignee: Dravo Corp
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Filing: 1971-10-12
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Granted: 1973-07-17
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Expires: 1991-10-12
Abstract
Abstract A bulk material handler is supported by a pivotable truck and two independently steerable and independently driven main wheels which stradle a loader equipped boom. For movement in a direction generally parallel to the boom, the main wheels are turned in synchronism in parallel planes. For slewing, the main wheels are turned in opposite directions until their rolling axes intersect the turning axis of the truck. For linear movement transverse to the boom, the main wheels are turned until their rolling axes are parallel to the boom. The vertically rotatable boom is pivoted at a point above the turning axis of the truck.
Inventors
- 👤 A Briggs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:36
CPC Classifications
E; E02; E02F; E02F9/00; E02F9/02; B; B65; B65G; B65G65/00; B65G65/02; B65G65/16; B65G65/20; E02F3/00; E02F3/04; E02F3/18
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
191 words
A bulk material handler comprising: a. an elongated body; b. a boom pivotally mounted near one end of said elongated body for vertical movement in a plane parallel to the longitudinal axis of said elongated body and with the boom extending beyond the opposite end of the elongated body; c. a conveyor extending for a substantial length along the axis of said boom; d. a pivotally mounted wheel assembly rotatable about a vertical turning axis passing through the longitudinal axis of the elongated body for supporting said one end of said elongated body; e. a pair of main wheels straddling and vertically overlapping the opposite end of the elongated body for supporting said opposite end thereof, said main wheels each being rotatable about a vertical turning axis in excess of 90*; f. independent drive means for each of said main wheels; g. main wheel steering means for turning said main wheels in the same angular direction about their vertical turning axes and in opposite angular directions about their turning axes in excess of 90*; and h. independent steering means for turning said pivotally mounted wheel assembly about the vertical turning axis.
Claim 2
Dependent Claim
191 words
A bulk material handler comprising: a. an elongated body; b. a boom pivotally mounted near one end of said elongated body for vertical movement in a plane parallel to the longitudinal axis of said elongated body and with the boom extending beyond the opposite end of the elongated body; c. a conveyor extending for a substantial length along the axis of said boom; d. a pivotally mounted wheel assembly rotatable about a vertical turning axis passing through the longitudinal axis of the elongated body for supporting said one end of said elongated body; e. a pair of main wheels straddling and vertically overlapping the opposite end of the elongated body for supporting said opposite end thereof, said main wheels each being rotatable about a vertical turning axis in excess of 90*; f. independent drive means for each of said main wheels; g. main wheel steering means for turning said main wheels in the same angular direction about their vertical turning axes and in opposite angular directions about their turning axes in excess of 90*; and h. independent steering means for turning said pivotally mounted wheel assembly about the vertical turning axis.
Claim 3
Dependent Claim
125 words
The bulk material handler of claim 1 including: a. main wheel mounts extending outward generally horizontally from either side of said opposite end of said elongated body, with at least the outer portion of each of said main wheel mounts extending obliquely away from said one end of the elongated body and with the longitudinal axis of each outer portion intersecting the associated main wheel; and b. main wheel support members pivotally mounted near the end of the main wheel mounts for rotation in a horizontal plane, said main wheel support members including stub axles extending outwardly upon which said main wheels are rotatably affixed and said steering arms extending horizontally from aid main wheel support members and connected to said main wheel steering means.
Claim 4
Dependent Claim
106 words
The bulk material handler of claim 2 wherein said main wheel steering means includes means for turning said main wheels in opposite angular directions about their vertical turning axes between a first home position in which the rolling axes of both of said main wheels are perpendicular to the longitudinal axis of aid elongated body and a second home position in which the rolling axes of both of said main wheels are parallel to the longitudinal axis of said main wheels, and means for rotating said main wheels about their vertical turning axes an equal amount in the same direction from each of said home positions.
Claim 5
Dependent Claim
45 words
The bulk material handler of claim 3 wherein said independent steering means includes means for turning the rotatably mounted wheel assembly about the vertical axis the same amount and in the same direction as the main wheels from each of the main wheel home positions.
Claim 6
Dependent Claim
64 words
The bulk material handler of claim 1 wherein said main wheel teering means include means for turning said main wheels in opposite directions about their vertical turning axes between a position in which the rolling axes are parallel and a position in which the rolling axes of both of said main wheels simultaneously intersect the vertical turning axis of said pivotally mounted wheel assembly.
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) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |