Daniel A Williamson

US Patent:

6585685, Jul 1, 2003

Filed:

May 9, 2002

Appl. No.:

10/143475

Inventors:

John Lawrence Staylor - Wilsonville OR
Sergio Landau - Laguna Nigel CA
Daniel E. Williamson - Sherwood OR

Assignee:

Bioject Inc. - Portland OR

International Classification:

A61M 530

US Classification:

604 68, 604 70, 604136, 604181

Abstract:

A gas-powered, durable, needle-free hypodermic jet injection device includes a hand-held injector which carries a disposable injection cartridge with a volume of liquid medication to be injected in the form of a high velocity jet capable of penetrating the skin without the use of a hypodermic needle. The injection device provides an injection orifice, and an injection piston. Forceful movement of the injection piston caused by high pressure gas causes a high velocity injection jet of liquid medication to be expelled from the injection cylinder via the injection orifice. The injection device includes features which improve its safety, and also which improve its ease of manufacture, its durability, and its cost effectiveness.

US Patent:

6752781, Jun 22, 2004

Filed:

Jan 25, 2002

Appl. No.:

10/057052

Inventors:

Sergio Landau - Laguna Nigel CA 92692
Daniel Williamson - Sherwood OR 97140

International Classification:

A61M 530

US Classification:

604 70, 604 68, 604 71, 604140, 604141, 604181, 604209

Abstract:

A gas-powered, durable, needle-less hypodermic jet injection device ( ) includes a hand-held injector ( ) which receives into an injection cylinder a volume of liquid medication to be injected in the form of a high velocity jet capable of penetrating the skin without the use of a hypodermic needle. The injection device provides an injection orifice, and an injection piston. Forceful movement of the injection piston causes a high velocity injection jet of liquid medication to be expelled from the injection cylinder via the injection orifice. The injection device includes features which improve its usability, particularly for users with hands that are possibly weak, feeble, or arthritic, for example; and also includes additional features which improve manufacturability, durability, and cost effectiveness of the device.

US Patent:

7547293, Jun 16, 2009

Filed:

Oct 6, 2006

Appl. No.:

11/539585

Inventors:

Daniel E. Williamson - Sherwood OR, US
Ryan R. Beylund - Milwaukie OR, US

Assignee:

Bioject, Inc. - Tualatin OR

International Classification:

A61M 5/30

US Classification:

604 70

Abstract:

Needle-free hypodermic jet injection devices having an actuation system to effect an injection from a drug delivery system. The actuation system includes an injection force assembly adapted to transmit a driving force to the drug delivery system. The actuation system further includes a trigger assembly adapted to alter the actuation system between a plurality of configurations including a fired configuration in which the injection force assembly transmits a driving force to the drug delivery system. In some embodiments, the device has a recoil restriction system including a restriction member adapted to couple the recoil restriction system to the trigger assembly and a recoil member coupled to the injection force assembly and movable relative to the restriction member. The restriction member limits movement of the recoil member once the recoil member moves a predetermined distance relative to the restriction member.

US Patent:

7942845, May 17, 2011

Filed:

Jun 19, 2007

Appl. No.:

11/765245

Inventors:

Daniel E. Williamson - Sherwood OR, US
Ryan R. Beylund - Milwaukie OR, US
Keith K. Daellenbach - Portland OR, US

Assignee:

Bioject, Inc. - Tualatin OR

International Classification:

A61M 5/30

US Classification:

604 68, 604 70, 604 71

Abstract:

Needle-free injection devices having a drive assembly to provide an operative force to effect an injection and a dosing assembly to prepare the device for a subsequent injection. In some embodiments, the dosing assembly is configured to transfer injectate from an injectate source to the injectate assembly. In some embodiments, a portion of energy available to the drive assembly urges the injectate towards the injectate assembly. In some embodiments, the device includes a nozzle assembly having one or more ports.

US Patent:

8105272, Jan 31, 2012

Filed:

Jun 8, 2009

Appl. No.:

12/480561

Inventors:

Daniel E. Williamson - Sherwood OR, US
Ryan R. Beylund - Milwaukie OR, US

Assignee:

Bioject, Inc. - Tualatin OR

International Classification:

A61M 5/30

US Classification:

604 70

Abstract:

Needle-free hypodermic jet injection devices having an actuation system to effect an injection from a drug delivery system. The actuation system includes an injection force assembly adapted to transmit a driving force to the drug delivery system. The actuation system further includes a trigger assembly adapted to alter the actuation system between a plurality of configurations including a fired configuration in which the injection force assembly transmits a driving force to the drug delivery system. In some embodiments, the device has a recoil restriction system including a restriction member adapted to couple the recoil restriction system to the trigger assembly and a recoil member coupled to the injection force assembly and movable relative to the restriction member. The restriction member limits movement of the recoil member once the recoil member moves a predetermined distance relative to the restriction member.

US Patent:

8617099, Dec 31, 2013

Filed:

Nov 30, 2009

Appl. No.:

12/627605

Inventors:

Daniel E. Williamson - Sherwood OR, US

Assignee:

Bioject Inc. - Tigard OR

International Classification:

A61M 5/30
A61M 5/00

US Classification:

604 68, 604110, 604 72

Abstract:

A nozzle assembly for a needle-free injection device. The nozzle assembly includes a nozzle body including an injectate chamber and one or more outlet orifices and a plunger configured to move through the injectate chamber toward the one or more outlet orifices. In some embodiments, the plunger includes a first portion and a second portion removably joined by a frangible region. In some embodiments, the plunger includes extensions configured to couple the plunger to a drive assembly of a needle-free injection device.

US Patent:

20090137948, May 28, 2009

Filed:

Nov 26, 2007

Appl. No.:

11/945212

Inventors:

John R. Marshall - Beaverton OR, US
Daniel E. Williamson - Sherwood OR, US
Sergio Landau - Laguna Niguel CA, US

Assignee:

Bioject Inc. - Tualatin OR

International Classification:

A61M 5/30

US Classification:

604 68

Abstract:

Needle-free injection devices having a body, an actuation system, and a delivery system including a drive assembly and configured to receive a nozzle assembly. In some embodiments, the drive assembly includes a spring and a support member configured to restrict movement of the spring in a direction non-parallel to a central axis of the spring. In some embodiments, the drive assembly includes a transmission assembly configured to couple a drive source with the actuation system upon engagement of a nozzle assembly with the drive assembly. In some embodiments, the body is configured to acoustically seal an interface between the delivery system and the actuation system. In some embodiments, the body includes a gripping member selectively extendable from the body.

US Patent:

20100025503, Feb 4, 2010

Filed:

Oct 13, 2009

Appl. No.:

12/578300

Inventors:

Daniel E. Williamson - Sherwood OR, US

Assignee:

BIOJECT INC. - Tualatin OR

International Classification:

B05B 1/00

US Classification:

239597

Abstract:

A nozzle assembly for a needle-free injection device. The nozzle assembly includes a nozzle body including an injectate chamber and one or more outlet orifices and a plunger configured to move through the injectate chamber toward the one or more outlet orifices. In some embodiments, the plunger includes a first portion and a second portion removably joined by a frangible region. In some embodiments, the plunger includes extensions configured to couple the plunger to a drive assembly of a needle-free injection device.