Method for controlling material flow in a paving machine

• US 7,244,077 B2
• Filed: 11/23/2004
• Issued: 07/17/2007
• Est. Priority Date: 03/11/2003
• Status: Expired due to Term

• Current Assignee: VT LeeBoy, Inc. (Singapore Technologies Engineering Limited)
• Original Assignee: VT LeeBoy, Inc. (Singapore Technologies Engineering Limited)
• Inventors: Lee, William Michael, Lee, Eric Craig
• Primary Examiner(s): Hartmann; Gary S.
• Application Number:
  US10/997,720
• Publication Number:
  US 20050074282A1
• Time in Patent Office: 966 Days
• Field of Search: 404/72, 404/75, 404/96, 404/101
• US Class Current: 404/75
• CPC Class Codes: E01C 19/405 with spreading-out, levelling or smoothing means other than the tamping or vibrating means for compacting or smoothing, e.g. with screws for spreading-out the previously dumped material, with non-vibratory lengthwise reciprocated smoothing beam E01C19/407 takes precedence
• 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
• CPC Class Codes: E01C 19/4873 Apparatus designed for railless operation

Abstract

An auger/cut off assembly for a floating screed asphalt paver. The auger/cut off assembly consists of an auger mechanism with an axis of rotation and a cut off mechanism. The cut off mechanism has a concave cut off panel that rotates about the axis of the auger mechanism from an open strike off position to a closed cut off position. Because the concave cut off panel closely conforms to a portion of the circumference of the auger mechanism, the cut off mechanism provides for low ground clearance. The concave cut off panel serves the dual function of striking off the paving material when in the open strike off position and cutting off the deposit of paving material when in the closed cut off position.

Claims

1. A method for controlling material flow in a paver comprising:

a. mounting a movable curved cut off panel forward of a floating screed and adjacent to an auger that delivers paving material to a bed being paved; and

b. actuating the curved cut off panel to move at least a portion of the cut off panel to a closed cut off position beneath the auger to interrupt all flow of paving material to the bed being paved, wherein the cut off panel is continuously adjustable between the closed cut off position and an open position to adjust the degree of strike off material deposited by the auger.

2. The method of claim 1 wherein at least a concave portion of the cut off panel forms a trough beneath the auger to direct paving material outboard of the paver during continuing operation of the auger.

3. The method of claim 2 further comprising actuating the cut off panel to move to the open position wherein the cut off panel does not interrupt the flow of paving material to the bed being paved.

4. The method of claim 1 wherein the curved cut off panel is hydraulically actuated.

5. The method of claim 1 further comprising actuating the cut off panel to move to the open position wherein the cut off panel does not interrupt the flow of paving material to the bed being paved.