David H Chu

US Patent:

20050261761, Nov 24, 2005

Filed:

Jul 29, 2005

Appl. No.:

11/192102

Inventors:

David Chu - Pasadena CA, US

Assignee:

City of Hope - Duarte CA

International Classification:

A61F002/06

US Classification:

623001380

Abstract:

A temporary biocompatible stent and method for visceral anastomosis. The stent is provided with integral means for maintaining the structural stability of the stent while providing substantial flexibility. The method comprises fitting the luminal stumps of the viscus over either end of a stent of the invention, and joining the ends of each stump together. A short time after completion of the anastomosis, the stent dissolves and is absorbed safely into the body. The stent and method can be beneficially used in laparoscopic or more invasive traditional surgical procedures. The stent and method are particularly well suited for anastomosis of the bowel.

US Patent:

20060253109, Nov 9, 2006

Filed:

Feb 8, 2006

Appl. No.:

11/350223

Inventors:

David Chu - San Gabriel CA, US

International Classification:

A61B 17/00

US Classification:

606001000

Abstract:

A surgical robotic helping hand system according to the present invention enables a surgeon to effectively operate within a patient's body cavities via surgical instruments manually manipulated outside such cavities by holding the various surgical instruments otherwise held by assistant surgeons during the minimally invasive surgical procedure. At least one of the robot-like surgical instrument holders may be specially configured to contain a laparoscopic instrument such that the laparoscope is contained within a sleeve shifter device and capable of being remote controlled for advancement or retraction of the laparoscope along an axis thereof. The robotic-like arms of the surgical instrument holders and laparoscopic instrument holder are attached to a surgical fixation device having a retractor panel that may be adapted to fit a standard Bookwalter retractor device.

US Patent:

20070118174, May 24, 2007

Filed:

Nov 16, 2006

Appl. No.:

11/560730

Inventors:

David Chu - San Gabriel CA, US

International Classification:

A61B 17/00
A61B 17/08

US Classification:

606207000, 606157000

Abstract:

A method of occluding a patient's organ tissue during a minimally invasive surgical procedure is disclosed. The method includes providing a laparoscopic surgical clamp; passing distal end of surgical clamp into an opening of patient's body cavity; probing patient's tissue by moving first set and second set of double jaws of the surgical clamp between opened and closed positions; selecting tissue appropriate for being occluded with surgical clamp and suturing; clamping tissue with surgical clamp; passing at least one elongated suture into patient's body cavity with laparoscopic grasper; threading suture through a plurality of fenestration on at least one of upper portions of double jaws; puncturing patient's tissue with suture; threading suture through fenestration of at least one of the lower portions of double jaws; and clipping each end of suture on upper and lower portions of double jaws for securing the patient's tissue in a compressed position.

US Patent:

52940926, Mar 15, 1994

Filed:

Sep 28, 1992

Appl. No.:

7/951908

Inventors:

Richard B. Wade - Laguna Beach CA
David Chu - La Palma CA

Assignee:

Bridge Products - Northbrook IL

International Classification:

F16L 3728

US Classification:

2511496

Abstract:

A quick disconnect coupler includes a seal retaining member movably mounted in a coupler housing. A sealing washer biases the retaining member toward first position, and an annular seal is mounted in the retaining member. This annular seal defines both axial and radial sealing surfaces, and it is configured to transmit sufficient force to the seal retaining member to move the seal retaining member to a rearward position in response to a first, larger diameter plug bearing on the axial sealing surface, and to form a radial seal around a second, smaller diameter plug.

US Patent:

58604472, Jan 19, 1999

Filed:

May 10, 1996

Appl. No.:

8/644357

Inventors:

David Chu - Santa Ana CA

International Classification:

F16K 3112

US Classification:

13750525

Abstract:

An in line fluid pressure regulating and pressure relief device having a regulator body with an axial bore therethrough with an inlet chamber conectable to a source of fluid under pressure and an outlet chamber connect able to a device requiring fluid under substantially constant pressure. A fluid pressure regulator located in the regulator body maintains fluid pressure at the outlet chamber at a constant predetermined level. A bleed piston located in the axial bore between the inlet chamber and to the pressure regulating means loses contact with said pressure regulating piston when the pressurized fluid source is removed from the regulator or drops below a certain level relieving substantially all pressure in said exit chamber and any attached device passively rendering the device inoperable.

US Patent:

51673983, Dec 1, 1992

Filed:

Feb 8, 1991

Appl. No.:

7/652853

Inventors:

Richard B. Wade - Laguna Beach CA
David Chu - La Palma CA

Assignee:

Bridge Products, Inc. - Northbrook IL

International Classification:

F16L 3728

US Classification:

2511496

Abstract:

A quick disconnect coupler includes a seal retaining member movably in a coupler housing. A sealing washer biases the retaining member toward first position, and an annular seal is mounted in the retaining member. This annular seal defines both axial and radial sealing surfaces, and it is configured to transmit sufficient force to the seal retaining member to move the seal retaining member to a rearward position in response to a first, larger diameter plug bearing on the axial sealing surface, and to form a radial seal around a second, smaller diameter plug.

US Patent:

50222686, Jun 11, 1991

Filed:

May 22, 1989

Appl. No.:

7/355540

Inventors:

H. Alan Wolf - Franklin Lakes NJ
David L. Chu - Baton Rouge LA

Assignee:

Exxon Research and Engineering Company - Florham Park NJ

International Classification:

G01N 924

US Classification:

73602

Abstract:

Vibrational Analysis technology translates acoustic/vibratory energy created by industrial processes into useful, process-related information. This invention enables a non-acoustical expert to easily collect and interpret the data.

US Patent:

20220375583, Nov 24, 2022

Filed:

Jul 14, 2022

Appl. No.:

17/812664

Inventors:

- FLORHAM PARK NJ, US
David CHU - Franklin Lakes NJ, US

International Classification:

G16H 40/20

Abstract:

A method for a patient to identify and select a health care provider to service the patient's particular need and subsequently schedule an appointment with the health care provider is described. Data regarding the patient and data regarding the provider are used to determine matching physicians to the patient's needs. The patient has the ability to select among matching physicians, rank ordered based on a combination of patient and other criteria, and the patient is offered an average rating for each physician, where the rating is based on reliable reviews of at least other patients.