Ronny Terrill Thomas

US Patent:

49558714, Sep 11, 1990

Filed:

Jun 1, 1989

Appl. No.:

7/360125

Inventors:

Ronny D. Thomas - Bellevue WA

Assignee:

PATH - Seattle WA

International Classification:

A61M 518
A61M 532

US Classification:

604217

Abstract:

A single-use disposable syringe. In the syringe, a reservoir is formed of two sheets of thermoplastic material having expanded central portions that form a pair of convex domes. Both of the domes are compressible, and a connecting member spaces apart the domes. In response to complete compression of both of the central portions together, the reservoir substantially collapses and each of the domes becomes concave to prevent the reservoir from being reformed and to prevent reuse of the syringe. After partial compression of both of the central portions together and partial collapse of the reservoir, the central portions expand to reform the reservoir and draw fluid into the reservoir, thereby aspirating a hypodermic needle.

US Patent:

52229483, Jun 29, 1993

Filed:

Sep 9, 1991

Appl. No.:

7/756889

Inventors:

Glenn Austin - Seattle WA
Carib Nelson - Bellevue WA
Ronny D. Thomas - Freeland WA

Assignee:

Path - Seattle WA

International Classification:

A61M 5178

US Classification:

604213

Abstract:

An improved injection port (1) for a single-use syringe is described. One embodiment of the injection port has a one-way valve system for making it more difficult to reuse the syringe (2). The one-way valve system has a flap or diaphragm valve (6) housed in a valve chamber (11) at the proximal end of port cylinder (45). When the valve (6) is seated against valve seat (51) on valve cap (5), refilling of the syringe is blocked. During injection, the valve (6) unseats and moves toward radial ribs (7), allowing flow of medicament into the proximal end of a needle (2). Another embodiment of the injection port (1) includes longitudinal grooves (8) on the interior surface of the chamber (12) at the distal end of cylinder (45). The grooves (8) vent pressure from a Luer syringe inserted in the distal end of the cylinder (45).

US Patent:

48834734, Nov 28, 1989

Filed:

May 27, 1988

Appl. No.:

7/199612

Inventors:

Ronny D. Thomas - Bellevue WA

Assignee:

Path - Seattle WA

International Classification:

A61M 518
A61M 532

US Classification:

604217

Abstract:

A single use, single dose injection administering device including a drug or vaccine containing body and a needle wherein the sidewalls have memory causing at least one sidewall to collapse into the other during the administration of the vaccine.