Deka Products Limited Partnership

Segway, Inc.

New Power Concepts LLC

Jeremy B Lund

J Douglas Field

Jon Stevens

Christopher Charles Langenfeld

Jon Michael Stevens

Dean Kamen

David W Robinson

John B Morrell

John David Heinzmann

Burl W Amsbury

Jonathan B Pompa

Prashant Bhat

Andrew A Schnellinger

Michael G Norris

Michael S Place

Douglas J Field

An annular venturi burner assembly and Stirling engine. The annular venturi burner injects fuel into combustion air flowing axially through a port with an annular cross section. The fuel enters the annular cross-section from the outside diameter. The flow of air through the annular section creates suction that draws the fuel through the ports. A venturi bushing directs the flow of fuel to provide improved and more uniform mixing of fuel and air.

Annular venturi burner for stirling engine

A method for fore-aft stabilization of a vehicle for motion in a specified direction over an underlying surface. The vehicle has at least one forward wheel and at least one aft wheel, and the forward wheel is characterized by a force normal to the instantaneous direction of motion of the vehicle. A motor actuator drives each aft wheel, and a controller governs the motor actuator or motor actuators in such a manner as to dynamically stabilize the vehicle, according to a uniform control law, when the forward wheel is in contact with the underlying surface or not. A torque is applied to the aft wheel on the basis of vehicle pitch or the force on the forward wheel normal to the direction of motion. Additionally, a periodic rotational modulation may be applied to the aft wheel, and a stabilizing torque provided based on a detected response, either of vehicle pitch or of normal force on the front wheel. Left and right motor actuators may independently control left and right aft wheels to continue turns as governed by user steering, whether or not forward wheels are in contact with the ground.

Vehicle control by pitch modulation

A method for conducting the motion of a transporter under riderless conditions. The transporter has two laterally disposed primary wheels. In accordance with the method, an input is received via a user input disposed on the transporter and a control signal corresponding to the input received is generated. Then a torque is applied to the laterally disposed wheels so as propel the transporter on the basis of at least the control signal. The control signal may correspond to either a commanded torque or to a commanded transporter velocity. The torque may include coadded terms where the terms are, respectively, proportional to the control signal, to a counteracting artificial friction proportional to the common velocity of the wheels, and a term proportional to the differential rotation of the wheels to facilitate turning of the transporter.

Guided control of a transporter

Growing community of inventors

Amherst, NH, United States of America

Jeremy B Lund