US4411554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Material spreader and bridge
Assignee: Individual
•
Filing: 1981-10-21
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Granted: 1983-10-25
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Expires: 2001-10-21
Abstract
Abstract A material spreader and bridge is described including a pair of spaced-apart wheeled frames having an elongated horizontally disposed bridge secured to and extending therebetween. A hopper assembly is movably mounted on the bridge and includes an apparatus for moving the hopper assembly between the ends of the bridge. The hopper assembly comprises a pair of hoppers which are positioned on opposite sides of the bridge and which are designed to spread material on a surface therebelow as the hopper assembly is moved between the ends of the bridge.
Inventors
- 👤 Edward P. Gratzfeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 03:52
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/12; E01C19/20; E01C19/201; E01C19/202; E01C23/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
196 words
A material spreader for spreading material onto a surface comprising, first and second spaced-apart wheeled frames, an elongated horizontally disposed bridge means secured to and extending between said wheeled frames, said bridge means including a flat horizontally disposed worker support surface thereon, a hopper assembly movably mounted on said bridge means, said hopper assembly being removably mounted on said bridge means to permit said worker support surface to be utilized, said hopper assembly comprising a pair of hoppers positioned on opposite sides of said bridge means, each of said hoppers having upper and lower ends, the upper end of each of said hoppers adapted to receive the material to be spread, means at the lower end of each of said hoppers adapted to control the flow of material therefrom, and means for moving said hopper assembly between the ends of said bridge means, each of said hoppers having elongated discharge openings formed at the lower end thereof, the longitudinal axis of each of said discharge openings being disposed transversely to the length of said bridge means, the distance between the discharge openings in said hoppers being equal to the length of one of said discharge openings.
Claim 2
Dependent Claim
196 words
A material spreader for spreading material onto a surface comprising, first and second spaced-apart wheeled frames, an elongated horizontally disposed bridge means secured to and extending between said wheeled frames, said bridge means including a flat horizontally disposed worker support surface thereon, a hopper assembly movably mounted on said bridge means, said hopper assembly being removably mounted on said bridge means to permit said worker support surface to be utilized, said hopper assembly comprising a pair of hoppers positioned on opposite sides of said bridge means, each of said hoppers having upper and lower ends, the upper end of each of said hoppers adapted to receive the material to be spread, means at the lower end of each of said hoppers adapted to control the flow of material therefrom, and means for moving said hopper assembly between the ends of said bridge means, each of said hoppers having elongated discharge openings formed at the lower end thereof, the longitudinal axis of each of said discharge openings being disposed transversely to the length of said bridge means, the distance between the discharge openings in said hoppers being equal to the length of one of said discharge openings.
Claim 3
Dependent Claim
40 words
The spreader of claim 1 wherein said means at the lower end of each of said hoppers for controlling the flow of material therefrom comprises a pair of opposing, horizontally disposed gate members movable towards and away from each other.
Claim 4
Dependent Claim
36 words
The spreader of claim 1 wherein said bridge means is selectively vertically adjustably mounted on said wheeled frames to vary the distance between said discharge openings and the surface upon which the material is being spread.
Claim 5
Dependent Claim
34 words
The spreader of claim 1 wherein each of said frames comprises a horizontally disposed frame member having opposite ends, and a caster wheel mounted at each of the opposite ends of said frame member.
Claim 6
Dependent Claim
33 words
The spreader of claim 4 wherein a manually movable brake means is selectively mounted on each of said frames for preventing movement of said bridge means during the operation of said hopper means.
Claim 7
Dependent Claim
25 words
The spreader of claim 4 wherein each of said frames includes means for locking each of said caster wheels in various of its pivotal positions.
Claim 8
Dependent Claim
39 words
The spreader of claim 1 wherein at least one of said frames has a pair of alternate wheels mounted on said frame member adapted to permit one end of the bridge means to be supported on an elongated member.
Claim 9
Dependent Claim
23 words
The spreader of claim 7 wherein said alternate wheels are concave so as to be able to roll upon an elongated pipe member.
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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) | 1986-10-24 | 1987-04-25 | 1987-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-24 | 1991-04-25 | 1991-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-24 | 1995-04-25 | 1995-10-25 | $7700.00 | Window Closed / Lapsed |