John Warren Leonard

US Patent:

53633059, Nov 8, 1994

Filed:

Feb 28, 1992

Appl. No.:

7/843570

Inventors:

Ingemar Cox - Lawrenceville NJ
John J. Leonard - Boston MA
Hugh Durrant-Whyte - Oxford, GB2

Assignee:

NEC Research Institute, Inc. - Princeton NJ

International Classification:

G06F 1500
G01C 300

US Classification:

364443

Abstract:

A navigation system for a mobile autonomous robot that includes apparatus for creating and maintaining a map of an environment the mobile autonomous robot is to traverse including provision for storing in a map at an assigned location features representative of geometric beacons located in the environment. Because of the uncertainty in its sensor's operating conditions and changes in the environment, a credibility measure is associated with each map feature stored. This credibility measure is increased or decreased whenever the map feature assigned to a location matches or does not match, respectively, a geometric beacon corresponding to such location. Whenever a geometric beacon is observed for a location that does into match a previously stored map features, an appropriate map feature is added for such location.

US Patent:

46831118, Jul 28, 1987

Filed:

Jan 23, 1986

Appl. No.:

6/821844

Inventors:

John L. Helm - Groton CT
John S. Leonard - Lyme CT

Assignee:

Proto-Power Corporation - Groton CT

International Classification:

G21C 356

US Classification:

376391

Abstract:

An improved gas circulator for a gas-cooled nuclear reactor system is disclosed which includes a stator, a rotor having a rotor shaft, and an impeller attached to one end thereof. A radial active magnetic bearing and a radial backup bearing are positioned proximate each end of the rotor shaft. An axial active magnetic bearing is also located between the ends of the rotor shaft, as is an axial backup bearing, with two of the backup bearings enclosed within a sealed chamber that may contain a lubricant, for example, a solid lubricant or a liquid lubricant. Preferably, the gas circulator is installed in a nuclear reactor system with the rotor shaft in a substantially vertical orientation and the sealed chamber near the bottom of the rotor shaft. The lower radical backup bearing and the axial backup bearing are advantageously located within the sealed chamber. The lower radial backup bearing and the axial backup bearing may be spaced apart sufficiently to permit the lower radial backup bearing to provide substantially all radial support for the rotor when the radial active magnetic bearings are deenergized.

US Patent:

48636762, Sep 5, 1989

Filed:

Dec 19, 1985

Appl. No.:

6/810993

Inventors:

John L. Helm - Groton CT
John S. Leonard - Lyme CT

Assignee:

Proto-Power Corporation - Groton CT

International Classification:

G21C 1518

US Classification:

376299

Abstract:

In a high-temperature gas-cooled nuclear reactor system, which is suitable for modular utilization in combination with one or more other similar nuclear reactor systems, an arrangement which comprises passive heat sink means for absorbing decay heat energy generated at a reactor core included within said reactor system; and means for removing heat energy from said heat sink means at a rate sufficient to maintain the capacity of the heat sink means for absorption of decay heat energy such that release of fission products resulting from loss of forced circulation of gas coolant, or such loss in combination with coolant depressurization, when the reactor is critical and at power is prevented, thereby to provide safety means independent of human or automatic activation; and method embodiments corresponding to same.

US Patent:

45468974, Oct 15, 1985

Filed:

Oct 2, 1984

Appl. No.:

6/657100

Inventors:

Joseph T. Maloy - West Orange NJ
John F. Leonard - Xenia OH
David H. Fritts - Dayton OH

Assignee:

The United States of America as represented by the Secretary of the Air
Force - Washington DC

International Classification:

B65D 1742

US Classification:

220277

Abstract:

A novel hermetically sealed, protective atmosphere transfer vessel is described which comprises a container defining an interior cavity and opening thereof for receiving a sample to be protected during transfer, an annular lip surrounding the opening for receiving a flexible puncturable membrane stretched across the opening for hermetically sealing the container, and a wire puncture bridge attached at one to the container and having at the other end a point positioned near the membrane whereby pressure internal of the container expands the membrane against the point to puncture and tear away the membrane for exposure of the sample. An alternative embodiment includes a lid for the container including an axial exhaust hole therethrough and a ball valve for sealing the exhaust hole under the influence of external pressure on the lid.

US Patent:

20200030555, Jan 30, 2020

Filed:

Mar 1, 2019

Appl. No.:

16/290620

Inventors:

- Irvine CA, US
Prashant Kakade - Princeton NJ, US
Darrell Woehler - Apache Junction AZ, US
John Leonard - Mesa AZ, US

International Classification:

A61M 15/00
B01F 5/04
F15D 1/02
F04F 5/46

Abstract:

The present invention provides for an enhanced eductor element that significantly increases the amount of pressure generated at the siphon tube without significantly increasing the flow resistance through the eductor. The invention further provides for breath-actuated inhalation devices including the enhanced eductor element as an actuation mechanism.

US Patent:

20170056609, Mar 2, 2017

Filed:

Nov 15, 2016

Appl. No.:

15/351632

Inventors:

- Irvine CA, US
Prashant Kakade - Princeton NJ, US
Darrell Woehler - Apache Junction AZ, US
John Leonard - Mesa AZ, US

International Classification:

A61M 15/00
F04F 5/46

Abstract:

The present invention provides for an enhanced eductor element that significantly increases the amount of pressure generated at the siphon tube without significantly increasing the flow resistance through the eductor. The invention further provides for breath-actuated inhalation devices comprising the enhanced eductor element as an actuation mechanism.

US Patent:

20160129208, May 12, 2016

Filed:

Nov 18, 2015

Appl. No.:

14/944335

Inventors:

- Irvine CA, US
Prashant Kakade - Princeton NJ, US
Darrell Woehler - Apache Junction AZ, US
John Leonard - Mesa AZ, US

International Classification:

A61M 15/00

Abstract:

The present invention provides for an enhanced eductor element that significantly increases the amount of pressure generated at the siphon tube without significantly increasing the flow resistance through the eductor. The invention further provides for breath-actuated inhalation devices comprising the enhanced eductor element as an actuation mechanism.