Michael Cohen Leshner, 47Lancaster, PA

6931120, Aug 16, 2005

Feb 15, 2001

09/783288

Michael D. Leshner - Columbia MD, US
Howard P. Leshner - Marlton NJ, US

MHL Communications, Inc. - Columbia MD

H04M001/00
H04M009/00

37939004

An electronic circuit for connecting a standard analog telephone to the analog microphone and loudspeaker connections on a personal computer and for separating the talk signal from the combined talk/listen signal occurring at the telephone, effectively minimizing undesirable echo.

5253536, Oct 19, 1993

Jul 1, 1992

7/907264

Thomas C. Jones - Columbia MD
Michael D. Leshner - Columbia MD

BOC Health Care, Inc. - Liberty Corner NJ

G01F 122
G01F 128

7386153

A rotary type flowmeter having a variable orifice through which the flow to be measured is directed toward a rotatable needle. A preload is also applied and which may be varied as desired. By the use of the variable orifice and with the preload, the same flowmeter may be used for differing ranges of flow by minor adjustment and various indicating scales may be taylored to the particular flow being monitored.

4904182, Feb 27, 1990

Jul 22, 1988

7/223233

Michael D. Leshner - Columbia MD

F23D 1462

431354

The present invention relates to a two stage venturi for a catalytic burner wherein a large exit aperture size and a small air entrainment opening are used to provide a low velocity, rich fuel/air mixture for the pre-heating process followed by a small exit aperture size and a large air entrainment opening to provide a high velocity, lean fuel/air mixture for the catalytic combustion process. Concentric rotating sleeves are used to vary the size of the exit apertures and the air entrainment openings.

4827887, May 9, 1989

Apr 20, 1988

7/183995

Michael D. Leshner - Columbia MD

Sonex Research, Inc. - Annapolis MD

F02B 32

123493

An adaptive charge mixture control for an internal combustion engine includes four input signals supplied to an OR gate to generate a net "go rich" signal supplied to a servo motor controlling an air/fuel charge mixture control valve for an internal combustion engine. The servo is also supplied with a "go lean" fixed signal tending to lean out the air/fuel mixture. The four "go rich" signals include a first signal derived from a comparison of engine speed with a predetermined minimum (i. e. , idle) level; a second signal derived from comparing throttle positions with a preset minimum throttle position; a third signal derived from comparing engine deceleration rate with a preset engine deceleration rate; and a fourth signal derived from a measurement of engine instantaneous power output.

5251601, Oct 12, 1993

Jul 28, 1992

7/920855

Michael D. Leshner - Columbia MD

Lean Power Corporation - Silver Spring MD

F02M 700

123436

An automatic control system is shown to vary the mixture of fuel-to-air in a conventional internal combustion engine to minimize resulting pollutants and maximize engine efficiency and performance. The system senses manifold vacuum and engine acceleration and based, in part, upon such inputs forces the mixture leaner until an instability event is detected at which time the system rapidly forces the mixture richer at a predetermined rate and time period to overcome the instability. The mixture is then again forced leaner. The rate of leaning is controlled by the vacuum pressure so that no leaning occurs at or near full throttle and the rate of leaning is decreased as power requirements decrease Further, secondary air is introduced substantially tangentially to the primary air/fuel flow to maximize mixture between the primary and secondary flows.

5117794, Jun 2, 1992

Mar 28, 1989

7/330927

Michael D. Leshner - Columbia MD
Ernest W. Chesnutis - Columbia MD
Christian Williams - Columbia MD
Ronald Stouffer - Silver Spring MD

Bowles Fluidics Corporation - Columbia MD

F02M 5102

123444

A bistable fluidic switch is switched from its stable state by a pin inserted in the power nozzle of the bistable fluidic switch, the pin being controlled by an electromagnetic actuator which is controlled from an electronic computer. The fluidic switch element has a cross-over type interaction region and a common outlet leading to a pair of output passageways, one of which returns fuel to the supply tank, and the other of which leads to the air intake manifold of the engine. Air is introduced into the output passageway leading to the engine so as to air atomize the fuel before injection of same into the air intake manifold.

5381771, Jan 17, 1995

Oct 8, 1993

8/133374

Michael D. Leshner - Columbia MD

Lean Power Corporation - Silver Spring MD

F02M 700

123436

An automatic control system is shown to vary the mixture of fuel-to-air in a conventional internal combustion engine to minimize resulting pollutants and maximize engine efficiency and performance. The system senses manifold vacuum and engine acceleration and based, in part, upon such inputs forces the mixture leaner until an instability event is detected at which time the system rapidly forces the mixture richer at a predetermined rate and time period to overcome the instability. The mixture is then again gradually forced leaner. The rate of leaning is controlled by the vacuum pressure so that no leaning occurs at or near full throttle and the rate of leaning is decreased either gradually or incrementally as power requirements decrease. The air-to-fuel ratio may be adjusted by regulating the introduction of secondary air or by adjusting the quantity of fuel injection. A control system for individually monitoring and correcting fuel injection rates of individual cylinders is provided.