Gregory E Duncan

US Patent:

56072902, Mar 4, 1997

Filed:

Nov 7, 1995

Appl. No.:

8/554726

Inventors:

Gregory S. Duncan - Corona CA

Assignee:

Wilden Pump & Engineering Co. - Grand Terrace CA

International Classification:

F04B 1700

US Classification:

417393

Abstract:

A pump having a center section including an actuator housing and an air valve is arranged with air chambers to either side of the actuator housing. Diaphragms are associated with the air chambers to create enclosed cavities for alternately pressurizing and venting the diaphragms. The actuator uses a pilot shifting shaft which is shuttled by movement of the diaphragms. An air valve is controlled by the shuttle shifting shaft to control flow to and from the air chambers. The passageways from the air chambers to exhaust find the passage to the outlet being at least as restrictive to air flow as the remainder of the passageways so as to prevent major pressure decreases within the actuator body. A diffuser includes a thin space between two surfaces into which the exhaust is directed. One of the surfaces is associated with a porous block of material.

US Patent:

20190332130, Oct 31, 2019

Filed:

Jul 9, 2019

Appl. No.:

16/506042

Inventors:

- Riverside CA, US
Alvin Ye - Ontario CA, US
James Stanley Burke - Glendora CA, US
Gregory Scott Duncan - Huntington Beach CA, US

International Classification:

G05D 16/06
F15B 13/00
G05D 16/04
F16K 47/16
F16K 31/126
F16K 17/06
F16K 17/04
F16K 31/385
G05D 7/01

Abstract:

A flow and pressure stabilization device includes a housing; a first fluid chamber; a gas chamber; a deformable bladder that separates the first fluid chamber from the gas chamber, the deformable bladder comprising a longitudinally protruding portion shaped such that, when a pressure in the gas chamber is greater than a pressure in the first fluid chamber, the longitudinally protruding portion extends toward the first fluid chamber; and a valve in fluid communication with a fluid outlet, the valve including: a second fluid chamber in fluid communication with the first fluid chamber; a fluid port in fluid communication with the fluid outlet; and a deformable diaphragm positioned adjacent to and biased toward the fluid port.

US Patent:

20190056756, Feb 21, 2019

Filed:

Dec 1, 2017

Appl. No.:

15/769191

Inventors:

- Riverside CA, US
Alvin Ye - Ontario CA, US
James Stanley Burke - Glendora CA, US
Gregory Scott Duncan - Huntington Beach CA, US

International Classification:

G05D 16/06
F16K 17/04
F16K 17/06
F16K 31/126
F16K 31/385
G05D 7/01
F16K 47/16

Abstract:

A flow and pressure stabilization device comprises a housing; a first fluid chamber; a gas chamber; a deformable bladder that separates the first fluid chamber from the gas chamber and at least partially defines a volume of the first fluid chamber; a second fluid chamber in fluid communication with the first fluid chamber via a fluid passage; and a variable flow valve in fluid communication with the second fluid chamber, the variable flow valve comprising: a fluid port in fluid communication with a fluid outlet; a deformable diaphragm positioned adjacent the fluid port, the diaphragm at least partially defining a volume of the second fluid chamber; and an outflow control button coupled to the diaphragm and extending at least partially into the fluid port, the outflow control button comprising an at least partially tapered surface.