Internal-combustion engines – Charge forming device – Gaseous fuel and air mixer
Reexamination Certificate
2007-12-18
2007-12-18
Kamen, Noah P. (Department: 3747)
Internal-combustion engines
Charge forming device
Gaseous fuel and air mixer
C123S0270GE
Reexamination Certificate
active
11277013
ABSTRACT:
A high-pressure fuel system supplies gaseous fuel to an internal combustion engine. Gaseous fuel pressure within the system is at least 17 MPa during normal operation. The system comprises a number of components and conduits and at least one resilient member for sealing at an interface between two components. The resilient member consists essentially of thermoplastic polyurethane. A corresponding method provides sealing between components containing gaseous fluids at pressures that can be above 17 MPa, in which the gaseous fluids routinely undergo rapid reductions in pressure. The method comprises disposing a resilient member, which consists essentially of thermoplastic polyurethane, at an interface between the components. Gas pressure fluctuations can occur during operation of the components or when the high-pressure gas is vented from the components upon shut down of the high-pressure system. A particularly suitable application for the present method is high-pressure gaseous fuel supply systems for internal combustion engines.
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Parker O-Ring Handbook, from Parker Hannifin Corporation, O-Ring Division. pp. 2-12, 3-27,3-31,7-28. Copyrignt 2001.□□□□.
New Advances in Polyurethane O-Ring Technology,Rick Hudson, HudsonOnline, Hudson Highlights Nov./Dec. 2000.
Brook Thomas C.
Post Adrian J.
Kamen Noah P.
McAndrews Held & Malloy Ltd.
Westport Power Inc.
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