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US 2003/0170075 A1Published application
Asphalt heater
AssigneeD.R.S. Co., LLC
InventorDavid R. Strassman
Life of this patent
Estimating the term…
Abstract
Disclosed is a powered tongue jack for maneuvering trailers and a trailer and tongue jack combination including an asphalt heater.
Claims15
A tongue jack for a trailer comprising:
- a rotatable collar fixed to a tongue of a trailer;
- a wheel attached to the rotatable 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;
- and
- means to control speed and direction of the motor.
3 more elements
A tongue jack and trailer comprising:
- a rotatable collar fixed to a tongue of the trailer;
- a wheel attached to the rotatable 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;
- 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 into the upper chamber;
- a venturi disposed between the fuel line and the upper chamber;
- and
- an igniter disposed in the lower chamber, whereby fuel introduced into the upper chamber diffuses through the gas-permeable refractory material and into the lower chamber.
11 more elements
Dependencies are inferred from the claim text.