Paver and method for simultaneously casting several paving material layers

• US 7,284,929 B2
• Filed: 03/25/2005
• Issued: 10/23/2007
• Est. Priority Date: 04/02/2004
• Status: Active Grant

• Current Assignee: Joseph Vã¶Gele AG (Deere & Company)
• Original Assignee: Joseph Vã¶Gele AG (Deere & Company)
• Inventors: Schwenninger, Dieter
• Primary Examiner(s): Addie; Raymond W
• Application Number:
  US11/090,319
• Publication Number:
  US 20050220540A1
• Time in Patent Office: 942 Days
• Field of Search: 404/82, 404/102, 404/83, 404/101, 404/108, 404/113, 404/118
• US Class Current: 404/102
• CPC Class Codes: E01C 19/48 for laying-down the materials and consolidating them, or finishing the surface , e.g. slip forms therefor, forming kerbs or gutters in a continuous operation in situ E01C19/002, E01C23/065 take precedence; devices for guiding or controlling the machines along a predetermined path E01C19/004

Abstract

At least two paving screeds B1, B2 which are distant in operation running direction R are supported at a chassis 1 of a paver F. The paver F is designed for simultaneously casting several paving material layers L1, L2 on top of each other on a plane P. Each paving screed B1, B2 is provided with a compaction assembly. One paving screed B1 for casting a lower layer L1 is provided at a front end section of the chassis 1 and has the compaction assembly 13, 14 for generating a degree of compaction in the lower layer L1 which suffices to withstand the direct contact of the undercarriage 2. At least one further paving screed B2 for casting an upper layer L2 is arranged behind the undercarriage 2. According to the method to be carried out with the paver F the lower layer which is cast and compacted in front of the undercarriage allows to run the undercarriage 2 on the lower layer while the upper layer L2 is cast and compacted behind the undercarriage 2.

Claims

1. A paver for casting at least two layers of material on a surface, one layer on top of the other layer, comprising:

a chassis carried by an undercarriage,

a first paving screed on the front end of said chassis that has at least one of a selectively adjustable height or a selectively adjustable blade angle for casting a lower layer of material from material previously deposited adjacent to the surface;

a second paving screed on the rear end of said chassis, said second paving screed separated from said first paving screed by a distance in the casting running direction of said undercarriage for casting a second layer of material on the lower cast layer cast by said first paving screed, said second paving screed having a screed body of a base screed part or of an extendable paving screed having sidewardly extendable screed parts.

a compaction assembly for each said first and second paving screed for generating a predetermined degree of compaction for the material deposited by the respective screed, said compacting assembly of said first paving screed comprising a high compaction assembly with at least one high compaction bar with compaction bar drives and at least one tamper bar with tamper bar drives;

a hopper on said chassis into which the material to be deposited by said second screed is placed, and

a conveyor between said hopper and said second paving screed for carrying the material from said hopper to said second paving screed.

2. Paver as in claim 1, wherein said first paving screed is placed in front of the front section of said chassis and at least partly below a filling area of said hopper.

3. Paver as in claim 1, further comprising a lateral distribution auger or a lateral distribution blade as a lateral distribution assembly in front of said second paving screed.

4. Paver as in claim 1, wherein said second paving screed is pivotable about a lateral axis by at least one adjustment drive provided between said second paving screed and the front end section of said chassis, wherein said second paving screed is adjustable in height and is fixed in the adjusted height and pivoted position in relation to said chassis and together with the lateral axis or in relation to the lateral axis.

5. Paver as in claim 1, wherein said at least one said compaction bar drives or said at least one tamper bar drives of said first paving screed comprises hydraulic devices connected via supply lines directly to a power supply of said at least one compaction bar drives or said at least one tamper bar drives of said second paving screed.

6. Paver as in claim 1, wherein

said first paving screed is hung into outriggers provided at the chassis or at a chassis lateral beam arranged at the front end section of said chassis, respectively, via a lateral tube defining a lateral axis, and

a height adjustment assembly between either the lateral tube and the outriggers,

or between said first paving screed and the chassis lateral beam.

7. Paver as in claim 1, wherein said first paving screed defines a sub-structure group which is removably mounted at the front end section of said chassis.

8. Paver as in claim 1, further comprising:

a pouring surface assembly having the shape of a saddleback roof provided at the front end section of said chassis above said first paving screed and said pouring surface assembly comprising a gather snout extending downwardly in front of said second paving screed, and

a lateral distribution assembly arranged in front of said gathering snout.

9. Paver as in claim 8 wherein said pouring surface assembly comprises sheet metal parts and/or rubber plates.