Screed plate and tamper bar arrangement for paving apparatus or paving applications

Abstract

Aspects of the disclosure are directed to systems, and apparatuses, and methods for a screed system for a road paver that includes tamper bar subsystem including a screed plate, the tamper bar subsystem, and a tamper bar drive subsystem. The screed plate has a first paving surface with a first pattern for contacting a paving material. The tamper bar subsystem is positioned forward of the screed plate in a paving direction of the screed system and includes a tamper plate and a tamper bar. The tamper plate has a second paving surface with a second pattern for contacting the paving material. The tamper bar drive subsystem is coupled to the tamper bar and configured to selectively move the tamper bar between a first position and a second position in a direction non-parallel to the paving direction of the screed system.

What is claimed is: 
     
         1 . A screed system for a road paver, the screed system comprising:
 a screed plate having a first paving surface with a first pattern for contacting a paving material;   a tamper bar subsystem positioned forward of the screed plate in a paving direction of the screed system, the tamper bar subsystem including a tamper plate and a tamper bar, the tamper plate having a second paving surface with a second pattern for contacting the paving material; and   a tamper bar drive subsystem coupled to the tamper bar and constructed to selectively move the tamper bar between a first position and a second position in a direction non-parallel to the paving direction of the screed system.   
     
     
         2 . The screed system of  claim 1 , wherein the tamper plate is movable independently of the screed plate. 
     
     
         3 . The screed system of  claim 1 , wherein a first end of the tamper plate in the paving direction is curved. 
     
     
         4 . The screed system of  claim 1 , wherein the tamper bar drive subsystem is operable to vibrate the tamper bar between the first position and the second position. 
     
     
         5 . The screed system of  claim 1 , further comprising a control system configured to receive information indicative of a material property of the paving material and determine a stroke length or an amount of vibration of the tamper bar based on the material property of the paving material. 
     
     
         6 . The screed system of  claim 5 , wherein the material property of the paving material comprises a density of the paving material. 
     
     
         7 . The screed system of  claim 1 , wherein the first pattern and the second pattern are a same pattern. 
     
     
         8 . The screed system of  claim 1 , wherein the first pattern and the second pattern are different patterns. 
     
     
         9 . The screed system of  claim 1 , wherein the first and second pattern each include a repetitive wave form pattern, a repetitive v-shaped pattern, a repetitive diamond-shaped pattern, a repetitive block shaped pattern, a pattern of undulations, a variably shaped wave pattern, or a combination thereof. 
     
     
         10 . A screed system and a tamper bar system for a road paver, the screed system comprising:
 a screed subsystem comprising a screed plate, wherein a screed surface of the screed plate is constructed to contact a paving material in a horizontally extending direction of the screed surface has a first pattern of protrusions extending therefrom; and   a tamper bar subsystem comprising a tamper plate and a tamper bar drive subsystem, the tamper bar subsystem being positioned forward of the screed plate in a direction of travel of the road paver, wherein at least a portion of a tamper surface of the tamper plate is constructed to contact the paving material in a horizontally extending portion of the tamper surface and has a second pattern of protrusions extending therefrom;   wherein the tamper bar subsystem is selectively movable from a first position to a second position, and wherein movement between the first position and the second position is at least partially in a direction perpendicular to the horizontally extending portion of the tamper surface.   
     
     
         11 . The screed system and the tamper bar system of  claim 10 , wherein the tamper bar subsystem is movable independently of any movement of the screed system. 
     
     
         12 . The screed system and the tamper bar system of  claim 10 , wherein a first end of the tamper plate curvably extends from the horizontally extending portion of the tamper surface. 
     
     
         13 . The screed system and the tamper bar system of  claim 10 , wherein the tamper bar drive subsystem is operable to selectively vibrate the tamper bar system. 
     
     
         14 . The screed system and the tamper bar system of  claim 10 , further comprising:
 a control subsystem configured to receive information indicative of a material property of the paving material and selectively vary a stroke length or an amount of vibration induced on the tamper bar subsystem by the tamper bar drive subsystem.   
     
     
         15 . The screed system of  claim 14 , wherein the material property of the paving material comprises a density of the paving material. 
     
     
         16 . The screed system and the tamper bar system of  claim 10 , wherein the first pattern and the second pattern include a similar pattern element. 
     
     
         17 . The screed system and the tamper bar system of  claim 10 , wherein the first and second pattern each include a repetitive wave form pattern, a repetitive v-shaped pattern, a repetitive diamond-shaped pattern, a repetitive block shaped pattern, a pattern of undulations, a variably shaped wave pattern, or a combination thereof. 
     
     
         18 . A screed system for a road paver, the screed system comprising:
 a screed plate having a first paving surface constructed for contacting a paving material;
 a tamper bar subsystem positioned forward of the screed plate in a paving direction of the screed system, the tamper bar subsystem including a tamper plate and a tamper bar, the tamper plate having a second paving surface constructed for contacting the paving material; a tamper bar drive subsystem coupled to the tamper bar and constructed to selectively move the tamper bar between a first position and a second position in a direction non-parallel to the paving direction of the screed system; and 
   a control system configured to receive information indicative of a material property of the paving material and determine at least one of a stroke length and an amount of vibration of the tamper bar based on the material property of the paving material.   
     
     
         19 . The screed system of  claim 18 , wherein the material property of the paving material comprises a density of the paving material. 
     
     
         20 . The screed system of  claim 19 , wherein the tamper plate is movable independently of the screed plate.