Calvin S Lee

US Patent:

6669146, Dec 30, 2003

Filed:

May 29, 2001

Appl. No.:

09/867246

Inventors:

Calvin K. Lee - Needham MA
John E. Buckley - Marlboro MA

Assignee:

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

International Classification:

B64D 1702

US Classification:

244145, 244142

Abstract:

A parachute cluster assembly includes a first round parachute having a first canopy of radially extending first gores, and a second round parachute having a second canopy of radially extending second gores. Adjacent ones of the first gores are joined along a line to adjacent ones of the second gores to fix the first canopy to the second canopy along the line. The first canopy defines a first slot spaced from but neighboring the first gores joined along the line, and the second canopy defines a second slot spaced from but neighboring the second gores joined along the line. The first and second slots are disposed on a same side of the cluster assembly.

US Patent:

7195205, Mar 27, 2007

Filed:

Oct 5, 2005

Appl. No.:

11/243888

Inventors:

Calvin K. Lee - Needham MA, US

Assignee:

United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

B64D 17/52

US Classification:

244149, 244142

Abstract:

A parachute system has a canopy, suspension lines that extend from the canopy skirt to a confluence point, and a center line that is attached to and between the apex of the canopy and the confluence point. A single reefing line cutter is attached to the center line and is activated after a predetermined amount of time has elapsed. A first reefing line extends through a first group of reefing rings wherein one end of the first reefing line is attached to the single reefing line cutter and the opposite end is attached to the canopy skirt at a first predetermined location. A second reefing line extends through a second group of reefing rings that is opposite the first group of reefing rings. The second reefing line has one end attached to the single reefing line cutter and an opposite end attached to the canopy skirt at a second predetermined location that is across from the first predetermined location. The canopy opens to an initial circumference that is determined by the summation of the lengths of the first and second reefing lines. When the reefing line cutter is activated, the reefing line cutter releases the first and second reefing lines so as to allow full inflation of the canopy.

US Patent:

7419122, Sep 2, 2008

Filed:

Nov 9, 2005

Appl. No.:

11/269918

Inventors:

Calvin Lee - Needham MA, US

Assignee:

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

International Classification:

B64D 17/58

US Classification:

244147

Abstract:

A parachute system having a parachute canopy having a skirt, and a plurality of gores spaced about the skirt. The plurality of gores is defined by first and second groups of gores. The parachute system includes a slider having a plurality of through-holes, a line loop attached to the slider, a first reefing line extending through the first group of gores and having a pair of ends attached to the line loop, and a second reefing line extending through the second group of gores and having a pair of ends attached to the line loop. A corresponding group of suspension lines passes through a corresponding through-hole in the slider. Each suspension line in each group of suspension lines is attached to a corresponding gore. A single reefing line cutter is engaged with the line loop and configured to cut the line loop after a predetermined amount of time has elapsed so as to release the reefing lines and allow the slider to slide down the suspension lines.

US Patent:

7494946, Feb 24, 2009

Filed:

Oct 3, 2005

Appl. No.:

11/242266

Inventors:

Phillip W. Gibson - Holliston MA, US
Calvin K. Lee - Needham MA, US

Assignee:

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

International Classification:

D04H 1/00
B32B 5/18

US Classification:

442354, 442341, 442373, 442189

Abstract:

A thermal insulation material for articles of clothing, the material including fibers for providing thermal insulation and fibers for providing a stable structure for the material.

US Patent:

20090024408, Jan 22, 2009

Filed:

Jul 18, 2008

Appl. No.:

12/176223

Inventors:

Dejia Wang - San Mateo CA, US
Suresh Kuppahally - Saratoga CA, US
Jie Weng - Sunnyvale CA, US
Calvin Lee - San Francisco CA, US
Li Chen - Cupertino CA, US

Assignee:

TRUEDEMAND SOFTWARE, INC. - Los Gatos CA

International Classification:

G06Q 10/00
G06N 5/02

US Classification:

705 1, 706 47

Abstract:

Methods, systems, and apparatus, including computer program products, for providing recommendations in a retail environment. A recommendation system includes a centralized knowledge base including one or more rules for defining logic to provide recommendations based on one or more detected system alerts, an alert engine for determining alert conditions in a retail presence including out of stock conditions, a root cause engine for determining one or more root causes for out of stock conditions that are detected, a mapping engine for mapping between alerts and recommendations, and a recommendation engine for issuing one or more recommendations associated with given alerts and determined root causes.

US Patent:

20090024450, Jan 22, 2009

Filed:

Jul 18, 2008

Appl. No.:

12/176286

Inventors:

Li Chen - Cupertino CA, US
Calvin Lee - San Francisco CA, US
Baskar Jayaraman - Fremont CA, US
Ihsan Kurt - San Jose CA, US
Juliette Aurisset - Menlo Park CA, US
Karthik Mani - San Jose CA, US
Jie Weng - Sunnyvale CA, US

Assignee:

TRUEDEMAND SOFTWARE, INC. - Los Gatos CA

International Classification:

G06Q 10/00
G06Q 30/00

US Classification:

705 10

Abstract:

Methods, systems, and apparatus, including computer program products, for detecting and estimating lost sales. A demand distribution for a product provided by a retail presence is determined. A probability of a lost sales occurrence is evaluated, including determining a predetermined time period and a probability of no sales over the predetermined time period. A determination of whether no sales have occurred over a time period corresponding in length to the predetermined time period is made. If the probability of no sales is below a threshold, an estimate of lost sales is determined.

US Patent:

62991043, Oct 9, 2001

Filed:

Aug 3, 2000

Appl. No.:

9/631541

Inventors:

Mahmoud A. El-Sherif - Narbeth PA
Dina M. El-Sherif - Narbeth PA
Calvin K. Lee - Needham MA

Assignee:

Photonics Laboratories, Inc. - Narberth PA

International Classification:

B64D 1700

US Classification:

244142

Abstract:

A system and method for evaluating flexible structures such as textiles under load generally. A specific embodiment is shown for parachutes. A plurality of first sensors and second sensors are attached to the parachute on its canopy and suspension lines. Preferred first sensors are fiber Bragg gratings (FBG) type sensors, and preferred second sensors are modal power distribution (MPD) type sensors. A fiber optic network interconnects the pluralities of first and second sensors to provide sensor outputs which are converted to electronic signals, modulated and transmitted to a receiving station for receiving and processing the transmitted modulated electronic signals. The preferred fiber optic network includes a plurality of light emitting diodes positioned at one end of each fibers and a photodiode array positioned to receive light from each of the fibers. The transmitter acquires the output as data, processes and RF modulates the signal to enhance the signal to noise ratio and prepares it for wireless transmission. The signal may be recorded or read-out before modulation.

US Patent:

49555634, Sep 11, 1990

Filed:

Aug 25, 1989

Appl. No.:

7/401192

Inventors:

Calvin K. Lee - Needham MA
James E. Sadeck - East Freetown MA

Assignee:

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

International Classification:

B64D 1736

US Classification:

244152

Abstract:

A parachute assembly and method for the controlled airdrop of a payload is isclosed. The parachute assembly includes a cluster of parachutes and a control means. Each parachute in the cluster includes a canopy, a plurality of reefing rings attached to the skirt portion of the canopy and a plurality of suspension lines that are attached to the skirt portion at their one end and attachable to a payload at their other end. The control means comprises a common member disposed between and intermediate to each parachute, a plurality of control lines that are threaded through a plurality of the reefing rings on confronting skirt portions of each of two parachutes, and at least one control loop for each control line, which control loop is breakable under tension forces generated at the skirt portion during canopy opening. The method for controlling canopy release and opening of clustered parachutes comprises releasing the clustered parachutes from a single deployment bag. Each control loop breaks substantially simultaneously with all other control loops during opening.