Asphalt seam heater
First Claim
1. An asphalt seam heater comprising:
- an articulated frame movable between a collapsed position and an extended position;
a main wheel assembly attached to the frame and movable about a vertical axis, between a support position wherein the main wheel assembly supports the frame and enables the asphalt seam heater to be towed behind a towing vehicle when the articulated frame is in the collapsed position, and a retracted position wherein the main wheel assembly does not support the frame;
at least one heater disposed within and supported by the frame, the heater comprising;
a housing having an upper chamber and a lower chamber;
a gas-permeable refractory material disposed in the housing to define a closed upper chamber and an open-ended lower chamber;
a fuel line for introducing a combustible fuel-air mixture in to the upper chamber;
a venturi disposed between the fuel line and the upper chamber; and
an igniter disposed in the lower chamber, wherein fuel introduced into the upper chamber diffuses through the gas-permeable refractory material and into the lower chamber, where it is ignited by the igniter.
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Accused Products
Abstract
An articulated frame movable between a collapsed position and an extended position. A main wheel assembly is attached to the frame and movable between a support position where the main wheel assembly supports the frame and enables the asphalt seam heater to be towed behind a towing vehicle when the articulated frame is in the collapsed position, and a retracted position wherein the main wheel assembly does not support the frame. At least one asphalt heater of a defined configuration is disposed within and supported by the frame. Each heater includes a housing having an upper chamber and a lower chamber; a gas-permeable refractory material disposed in the housing to define a closed upper chamber and an open-ended lower chamber; a fuel line for introducing a combustible fuel-air mixture in to the upper chamber; a venturi disposed between the fuel line and the upper chamber; and an igniter disposed in the lower chamber, wherein fuel introduced into the upper chamber diffuses through the gas-permeable refractory material and into the lower chamber, where it is ignited by the igniter.
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Citations
14 Claims
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1. An asphalt seam heater comprising:
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an articulated frame movable between a collapsed position and an extended position; a main wheel assembly attached to the frame and movable about a vertical axis, between a support position wherein the main wheel assembly supports the frame and enables the asphalt seam heater to be towed behind a towing vehicle when the articulated frame is in the collapsed position, and a retracted position wherein the main wheel assembly does not support the frame; at least one heater disposed within and supported by the frame, the heater comprising; a housing having an upper chamber and a lower chamber; a gas-permeable refractory material disposed in the housing to define a closed upper chamber and an open-ended lower chamber; a fuel line for introducing a combustible fuel-air mixture in to the upper chamber; a venturi disposed between the fuel line and the upper chamber; and an igniter disposed in the lower chamber, wherein fuel introduced into the upper chamber diffuses through the gas-permeable refractory material and into the lower chamber, where it is ignited by the igniter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An asphalt seam heater comprising:
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an articulated frame movable between a collapsed position and an extended position, the frame comprising two sub-frames, each sub-frame being a mirror image of the other and comprising a first end and a second end, and wherein the two sub-frames are pivotally connected about a vertical axis, at their respective first ends; a main wheel assembly attached to each sub-frame at a point proximate to the first end of each sub-frame, each main wheel assembly movable between a support position wherein the main wheel assembly supports its respective sub-frame and enables the asphalt seam heater to be towed behind a towing vehicle when the articulated frame is in the collapsed position, and a retracted position wherein the main wheel assembly does not support its respective sub-frame; at least one heater disposed within and supported by one of the sub-frames, the heater comprising; a housing having an upper chamber and a lower chamber; a gas-permeable refractory material disposed in the housing to define a closed upper chamber and an open-ended lower chamber; a fuel line for introducing a combustible fuel-air mixture in to the upper chamber; a venturi disposed between the fuel line and the upper chamber; and an igniter disposed in the lower chamber, wherein fuel introduced into the upper chamber diffuses through the gas-permeable refractory material and into the lower chamber, where it is ignited by the igniter. - View Dependent Claims (10, 11, 12)
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13. An asphalt seam heater comprising:
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an articulated frame movable between a collapsed position and an extended position, the frame comprising two sub-frames, each sub-frame being a mirror image of the other and comprising a first end and a second end, and wherein the two sub-frames are horizontally pivotable about their respective first ends; a main wheel assembly attached to each sub-frame at a point proximate to the first end of each sub-frame, each main wheel assembly movable between a support position wherein the main wheel assembly supports its respective sub-frame and enables the asphalt seam heater to be towed behind a towing vehicle when the articulated frame is in the collapsed position, and a retracted position wherein the main wheel assembly does not support its respective sub-frame; a guide wheel assembly attached to each sub-frame at a point proximate to the second end of each sub-frame, each guide wheel assembly movable between a retracted position wherein the guide wheel assembly does not support its respective sub-frame, and an extended position wherein the guide wheel assembly supports its respective sub-frame; at least one heater disposed within and supported by one of the sub-frames, the heater comprising; a housing having an upper chamber and a lower chamber; a gas-permeable refractory material disposed in the housing to define a closed upper chamber and an open-ended lower chamber; a fuel line for introducing a combustible fuel-air mixture in to the upper chamber; a venturi disposed between the fuel line and the upper chamber; a manifold disposed within the upper chamber of the heater and operationally connected to the venturi; and an igniter disposed in the lower chamber, wherein fuel introduced into the upper chamber diffuses through the gas-permeable refractory material and into the lower chamber, where it is ignited by the igniter. - View Dependent Claims (14)
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Specification