Patent ID: 6551017
Filing Date: 2003-04-22
Classification: E01C

Abstract:
A tongue jack and trailer comprising:a rotable collar fixed to a tongue of the trailer; a wheel attached to the rotable collar such that the wheel is contactable with the ground and supports the trailer when in contact with the ground; means for raising and lowering the wheel; a motor operationally connected to the wheel such that the motor can rotate the wheel; and means to control speed and direction of the motor; and further comprising: an asphalt heater operationally connected to the trailer, 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.