US3841777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paving vibratory finishing machine having a device for constant compaction of the deposited layer
Assignee: Individual
•
Filing: 1972-05-03
•
Granted: 1974-10-15
•
Expires: 1992-05-03
Abstract
Abstract A road surfacing machine of the full floating type applies road surfacing material and then levels the same. In order to make sure that the density of the surfacing material is uniform despite irregularities in the contour, the machine detects the pressure between a pressor member and the surfacing material. When the pressure decreases, thereby indicating less density, then a screed or the like is raised to increase the quantity of deposited material in that region; and when the pressure increases, the screed or the like is lowered to decrease the quantity of material.
Inventors
- 👤 D Domenighetti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:32
CPC Classifications
E; E01; E01C; E01C19/00; E01C19/48; E01C19/4833; E01C19/4853
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
114 words
An automatic finishing machine for depositing on a substrate a layer having a smooth surface and substantially uniform density throughout the layer, comprising a vehicle, means operatively related to the vehicle for applying a said layer of material to said substrate, said applying means comprising distributing means for said material and strike-off means for levelling the distributed material, means operatively related to the vehicle for applying compacting force to said layer to smooth said layer, and means operatively related to the vehicle and to said compacting means responsive to variations in the pressure between said layer and said compacting means to vary the quantity of material deposited on said substrate inversely as said pressure.
Claim 2
Dependent Claim
114 words
An automatic finishing machine for depositing on a substrate a layer having a smooth surface and substantially uniform density throughout the layer, comprising a vehicle, means operatively related to the vehicle for applying a said layer of material to said substrate, said applying means comprising distributing means for said material and strike-off means for levelling the distributed material, means operatively related to the vehicle for applying compacting force to said layer to smooth said layer, and means operatively related to the vehicle and to said compacting means responsive to variations in the pressure between said layer and said compacting means to vary the quantity of material deposited on said substrate inversely as said pressure.
Claim 3
Dependent Claim
22 words
A machine as claimed in claim 1, said strike-off means and said means for applying compacting force being integral with each other.
Claim 4
Dependent Claim
56 words
A machine as claimed in claim 1, and a shock absorbing member operatively related to the vehicle between one portion of said compacting means and said vehicle, said strike-off means comprising a screed interconnected with said compacting means by said link means thereby simultaneously to move said compacting means and screed means in opposite vertical directions.
Claim 5
Dependent Claim
67 words
A machine as claimed in claim 1, and a vertical chain extending between two stationary pulleys on said vehicle, said strike-off means comprising screed means connected to one side of said chain for levelling the distributed material, an end of said compacting means being connected to the other side of said chain for opposite vertical movement of said screed means and compacting means relative to each other.
References Cited (Backward Citations)
US2351592A
Cited
US2346379A
Cited
US2393954A
Cited
US2491275A
Cited
US2591502A
Cited
US2757588A
Cited
US2796811A
Cited
US2922345A
Cited
US3029715A
Cited
US3053157A
Cited
US3111070A
Cited
US3142915A
Cited
US3599543A
Cited
US3453939A
Cited
US3678817A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |