US3909146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paving machine
Assignee: ALLATT Ltd
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Filing: 1974-09-23
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Granted: 1975-09-30
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Expires: 1994-09-23
Abstract
Abstract A paving machine for spreading paving materials onto a road surface to be paved as the machine is advanced thereover, includes a wheeled frame, a hopper for receiving paving materials mounted on the frame, and a chute through which paving materials are discharged onto the paving surface. The hopper includes a base on which the paving materials are deposited, and the base is reciprocated below an abutment to cause the paving materials to be swept by the abutment from the base into the chute.
Inventors
- 👤 Richard C Hoffman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:01
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/12; E01C19/18; E01C19/182
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
135 words
A paving machine for spreading paving materials onto a road surface to be paved as the machine is advanced thereover, said machine including a wheeled frame, a hopper for receiving paving materials mounted on the frame, a chute at one end of said hopper through which paving materials are dischargeable from the hopper onto the paving surface, the hopper including a base on which the paving materials are deposited, and which is reciprocable towards and away from said chute for conveying materials to said chute from the opposite end of said hopper, power means operatively related to said base for reciprocating the base as aforesaid, and means mounted within said hopper effective upon reciprocation of the base to sweep the paving materials along the base from the opposite end of the hopper into the chute.
Claim 2
Dependent Claim
135 words
A paving machine for spreading paving materials onto a road surface to be paved as the machine is advanced thereover, said machine including a wheeled frame, a hopper for receiving paving materials mounted on the frame, a chute at one end of said hopper through which paving materials are dischargeable from the hopper onto the paving surface, the hopper including a base on which the paving materials are deposited, and which is reciprocable towards and away from said chute for conveying materials to said chute from the opposite end of said hopper, power means operatively related to said base for reciprocating the base as aforesaid, and means mounted within said hopper effective upon reciprocation of the base to sweep the paving materials along the base from the opposite end of the hopper into the chute.
Claim 3
Dependent Claim
82 words
A paving machine according to claim 1 whereon the sweeping means comprises an abutment extending upwardly above the base transversely of the path of reciprocation thereof, and the reciprocating means causes paving materials on the base to move towards and into the feed chute by engagement of the paving materials against the abutment when the base moves in the direction of the abutment, and by the flow of further paving materials onto the base when the base moves in the opposite direction.
Claim 4
Dependent Claim
16 words
A paving machine according to claim 2 wherein the abutment is located immediately adjacent the base.
Claim 5
Dependent Claim
14 words
A paving machine according to claim 2 wherein the abutment constitutes the hopper bottom.
Claim 6
Dependent Claim
15 words
A paving machine according to claim 2 wherein the abutment is removable for cleaning purposes.
Claim 7
Dependent Claim
26 words
A paving machine according to claim 1 wherein the reciprocating means includes a fluid-operated motor beneath the base and connected between the base and the frame.
Claim 8
Dependent Claim
44 words
A paving machine according to claim 1 wherein the hopper is pivotably mounted on the frame for pivotal movement about a transverse axis adjacent the feed chute, so that the hopper can be tilted to assist the passage of paving material into the chute.
Claim 9
Dependent Claim
67 words
A paving machine according to claim 1 wherein the hopper has opposed pivotally mounted side walls which are pivotable relatively towards and away from each other about axes parallel to the path of reciprocation of the base, whereby relative movement of the side walls away from one another increases the storage capacity of the hopper and relative movement towards one another urges the material onto the base.
Claim 10
Dependent Claim
37 words
A paving machine according to claim 1 wherein the frame carries a transversely extending rotatable spreader roll adjacent a lower end of the chute to spread paving material from the chute onto the surface to be paved.
Claim 11
Dependent Claim
29 words
A paving machine according to claim 1 wherein a feed gate is mounteD in the chute, the gate being adjustable to vary the effective flow area of the chute.
Claim 12
Dependent Claim
44 words
A paving machine according to claim 10 wherein the frame carries a vertically adjustable screed extending transversely of the frame adjacent the spreader to level the paving material on the surface to be paved after the material has been spread thereon by the spreader.
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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |