ERVIN LESHNER
Engineers in Cherry Hill, NJ

4232643, Nov 11, 1980

Nov 22, 1976

5/743764

Ervin Leshner - Cherry Hill NJ
Michael D. Leshner - Cherry Hill NJ

Fuel Injection Development Corporation - Bellmawr NJ

F02B 300, F02M 1718, F02B 3300

123440

A charge forming system is disclosed which monitors a parameter of engine combustion efficiency, such as power output, and derives a signal indicating the sense of power change. A fuel mixture control system responds to an indication of increasing power to continually and progressively lessen the fuel/air ratio to attain the leanest possible mixture consistent with maximum instantaneous engine power output. In a preferred embodiment liquid fuel is vaporized before delivery to the engine combustion chambers, and a variable orifice provided to enhance the flow characteristics of the vaporized fuel.

3968689, Jul 13, 1976

Jun 30, 1975

5/591608

Ervin Leshner - Cherry Hill NJ

Fuel Injection Development Corporation - NJ

G01K 114, G01K 704, G01K 1302

73341

A gasket structure for supporting thermocouple junctions in a stream of gas passing through an internal combustion engine. The thermocouple leads are passed edgewise through a gasket, which is adapted to fit between the ports of an engine and the manifold associated therewith. The leads are firmly supported within the gasket, the junction formed by the ends thereof protruding into the gasket aperture. The thermocouple junction is thus disposed in the gas stream at a regular, predetermined distance from the combustion chamber of the engine. In one embodiment a plurality of thermocouples are embedded in an exhaust manifold gasket, each being associated with a separate exhaust port of an engine. A selector switch may be used to monitor the status of the gas flow through each port; or the thermocouples may be connected together so that an averaged signal is produced, and the signal utilized to monitor the fuel-air mixture ratio.

RE29978, May 1, 1979

Mar 23, 1977

5/780404

Ervin Leshner - Cherry Hill NJ
Michael D. Leshner - Cherry Hill NJ

Fuel Injection Development Corporation - Bellmawr NJ

F02B 1910, F02B 1918

123 32SJ

A combined fuel vapor injector and igniter system for internal combustion engines and method of operating the engine therewith in which liquid fuel enters an injector-igniter device, is vaporized using the engine's heat of combustion, and exits in vapor form into the engine combustion chamber where it mixes with air or an air-fuel mixture which has entered through an intake valve, or port, and the resulting air-fuel mixture is ignited. The system assures reliable ignition, so that engines may be run at leaner than stoichiometric air-fuel ratios to take advantage of increased fuel economy, and reduced emissions of the oxides of nitrogen hydrocarbons and carbon monoxide. Power output equalization is attained between cylinders.

4368707, Jan 18, 1983

Jul 28, 1980

6/172665

Ervin Leshner - Cherry Hill NJ
Michael D. Leshner - Glendora NJ

Fuel Injection Development Corporation - Bellmawr NJ

F02B 3300, F02M 700

123436

An adaptive charge forming system for an internal combustion engine is disclosed which monitors a parameter of engine combustion efficiency, such as power output, and derives a signal indicating the direction and amplitude of power change. The fuel mixture control system responds to changes in power output, regardless of their source, to maintain the engine air/fuel ratio in a preferred region. In a preferred embodiment, engine crankshaft angular acceleration is monitored to maintain the air/fuel mixture at the lean limit. A stepping motor is used to control a value for bleeding additional air into the charge; a clock provides steady pulses to the motor, tending to lean the mixture, while enrichment is effected upon the detection of each weak combustion event. The clock frequency thus sets the equilibrium rate of weak combustion events, defining the optimal mixture to be supplied to the engine.

4015569, Apr 5, 1977

Jan 7, 1976

5/647120

Ervin Leshner - Cherry Hill NJ
Michael D. Leshner - Cherry Hill NJ

Fuel Injection Development Corporation - Bellmawr NJ

F02M 718, F02M 3102

123133

A charge forming system for metering vaporized liquid fuel to an internal combustion engine. Liquid fuel is metered to a vaporizing chamber which is heated by the exhaust gases of the engine. Within the chamber the liquid vaporizes and expands rapidly, whereupon it is delivered to the intake ports of the engine to be mixed with air in the manifold or cylinders. The amount of fuel and air admitted to the engine is varied as function of both foot pedal position and developed engine power. The fuel-to-air ratio of the mixture provided to the cylinders is decreased as developed engine power increases. In a preferred embodiment additional fuel vapor is supplied to each combustion chamber by means of fuel vapor injectors, the net mixture supplied to the cylinders being leaner than the stoichiometric ratio. A feedback system monitoring selected engine parameters serves to vary the rate at which air is admitted to the engine, and an adjustable mechanism is provided to further adjust the proportions of the fuel-to-air ratio.

4670921, Jun 9, 1987

Jun 8, 1984

6/618511

Yoav Avni - Philadelphia PA
Ervin Leshner - Cherry Hill NJ

Action Manufacturing Company - Philadelphia PA

A47G 100, A47G 104

5 82R

A portable, collapsible stretcher has frame poles, each of which have a medial joint which folds in one direction and two outer joints which fold in the opposite direction. A wedge is insertable into the medial joint to support the weight when the stretcher is extended. The outer joints have a locking mechanism which is operated by a linkage interconnecting the spreader bars and the folding legs. As the stretcher is extended, the outer joints are locked and the legs are unfolded from their normal position against the frame poles.

4726296, Feb 23, 1988

Apr 22, 1985

6/725405

Ervin Leshner - Cherry Hill NJ
Reed E. Donnard - Huntingdon Valley PA

Action Manufacturing Company - Philadelphia PA

F42B 530

102467

An ammunition cartridge has a plastic case and a metal base having a plurality of grooves around the periphery thereof. The plastic case has an interference fit with the base. The plastic creeps into the grooves after being interference fit over the base to relieve the stress in the plastic. A stress modulator ring surrounds the plastic member in the area of the grooves.

4015572, Apr 5, 1977

Jan 7, 1976

5/647326

Ervin Leshner - Cherry Hill NJ
Michael D. Leshner - Cherry Hill NJ

Fuel Injection Development Corporation - Bellmawr NJ

F02M 718, F02B 1700, F02B 302

123139AW

An improved charge forming system for an internal combustion engine. Fuel and air are metered to the engine as functions of both operator control and manifested engine power output. The incremental changes in fuel flow and air flow which are effected as a result of changes in engine power output are unequal so that the total fuel-air mix ingested by the engine becomes leaner as engine power increases. When the fuel-air mixture becomes so lean that engine power decreases, the charge forming system enriches the mixture so that the system maximizes engine power for any given rate of fuel flow. In a presently preferred embodiment the fuel-air ratio supplied to the engine is leaner than the stoichiometric mixture.

4064748, Dec 27, 1977

Aug 19, 1976

5/715836

Ervin Leshner - Cherry Hill NJ
Michael D. Leshner - Cherry Hill NJ

Fuel Injection Development Corporation - Bellmawr NJ

G01M 1500

731173

The torque produced by an internal combustion engine is measured by algebraically combining averaged cylinder pressure with inlet manifold pressure, and manifesting the sum thereof. By multiplying the summed result by a factor representing engine speed, a direct measure of engine horsepower is obtained. The result may be displayed by an indicator or the like to provide an indication useful in operating or adjusting the engine.