Gerard G Normand

US Patent:

6406276, Jun 18, 2002

Filed:

Mar 20, 1992

Appl. No.:

07/855176

Inventors:

Gerard B. Normand - Manchester NH
Kevin Durand - Lancaster MA
Joseph B. Seale - Gorham ME
Dean L. Kamen - Bedford NH

Assignee:

DEKA Products Limited Partnership - Manchester NH

International Classification:

F04B 4306

US Classification:

417395

Abstract:

The invention provides a system for dispensing fluid at relatively constant pressure. In a first embodiment, the invention dispenses a fluid from a chamber of varying dimension defined by a pre-tensioned resilient membrane. In a second embodiment, the invention dispenses a fluid from a chamber defined by a dispensing membrane, which is substantially surrounded by another fluid contained within a pressure chamber of varying dimension defined by a pre-tensioned resilient membrane. In a third embodiment, the invention dispenses multiple fluids, a first fluid from a first dispensing chamber of varying dimension defined by a pre-tensioned resilient membrane, and a second fluid from a dispensing chamber of varying dimension defined by a dispensing membrane substantially surrounded by the first fluid. In a fourth embodiment the invention dispenses multiple fluids from at least two dispensing chambers of varying dimension each substantially surrounded by the pressure fluid contained within a pressure chamber of varying dimension defined by a pre-tensioned resilient membrane. In a preferred embodiment, the resilient membrane is pre-tensioned beyond the point at which, as fluid enters the volume contained by the membrane and the volume increases, the first derivative of pressure over volume becomes zero for the first time.

US Patent:

60564725, May 2, 2000

Filed:

Sep 29, 1997

Appl. No.:

8/939327

Inventors:

Michael Leo Latulippe - Derry NH
Gerard George Normand - Manchester NH

International Classification:

B25G 300

US Classification:

403301

Abstract:

A coupling member for interconnecting a hydraulic ejector cylinder, of injection molding equipment, with a mold ejector system to insure that the mold ejector system of the mold is properly activated and returned to its fully retracted position prior to commencing a further injection molding cycle. The coupling member comprises a first elongate stud which is releasably couplable to a second elongate stud to form the coupling member. The first elongate stud has a head, at one end thereof, and the second elongate stud has a stud recessed portion, at a mating end thereof, for at least partially receiving the head. A locking mechanism, carried by the second elongate stud, allows engagement and disengagement of the head from the stud recessed portion, when in a first position, and secures the head at least partially within the stud recessed portion, when in a second position.