Internal-combustion engines – Poppet valve operating mechanism – Hydraulic system
Reexamination Certificate
2009-01-26
2011-11-08
Chang, Ching (Department: 3748)
Internal-combustion engines
Poppet valve operating mechanism
Hydraulic system
C123S090130, C091S508000, C137S906000
Reexamination Certificate
active
08051812
ABSTRACT:
Actuators, and corresponding methods and systems for controlling such actuators, provide independent valve control with a large initial or opening force. In an exemplary embodiment, an actuator includes a driver further including a housing defining a longitudinal axis and first and second directions, an actuation mechanism capable of generating actuation force at least in the first direction, and a rod with one end operably connected with at least one part of the actuation mechanism and with the other end available for an operable connection with a load such as an engine valve; at least one return spring operably connected with the rod through a spring retainer assembly and biasing the rod in the second direction; and a pneumatic booster further including a pneumatic cylinder, a pneumatic piston operably connected with the rod through the spring retainer assembly and biasing the rod in the first direction, a charge mechanism providing a controlled fluid communication between the pneumatic cylinder and a high-pressure gas source, and a bleed mechanism providing a controlled fluid communication between the pneumatic cylinder to a low-pressure gas sink.
REFERENCES:
patent: 3949964 (1976-04-01), Freeman
patent: 4934652 (1990-06-01), Golden
patent: 5193495 (1993-03-01), Wood, III
patent: 5713316 (1998-02-01), Sturman
patent: 5988124 (1999-11-01), Duesmann
patent: 6230472 (2001-05-01), Stahlecker
patent: 6230742 (2001-05-01), Bircann
patent: 6543225 (2003-04-01), Scuderi
patent: 6584885 (2003-07-01), Lou
patent: 6883775 (2005-04-01), Coney et al.
patent: 6952923 (2005-10-01), Branyon et al.
patent: 7536984 (2009-05-01), Lou
patent: 2005/0132987 (2005-06-01), Chang
patent: 2008/0251041 (2008-10-01), Lou
patent: 2250801 (1992-06-01), None
patent: 2340881 (2000-03-01), None
patent: 40-010860 (1965-04-01), None
patent: 10-274105 (1998-10-01), None
patent: 2004-293695 (2004-10-01), None
Scuderi Group, LLC, Plaintiffv.LGD Technology, LLCandZheng(David)Lou, Ph.D., Defendents, Civil Complaint, U.S. District Court, District of Massachusetts.
Scuderi Group, LLC, Plaintiffv.LGD Technology, LLCandZheng(David)Lou, Ph.D., Defendents, Answer to Complaint, Affirmative Defenses, Counterclaims and Jury Demand.
Scuderi Group, LLC, Plaintiffv.LGD Technology, LLCandZheng(David)Lou, Ph. D., Defendents, Answer to Defendent's Counterclaim and Affirmative Defenses.
Kolbenschmidt Pierburg Group, “Exhaust Gas Recirculation,”, Pierburg GmbH Neuss, Germany (www.kolbenschmidt-pierburg.com).
Australian Application No. 2007351850—Office Action dated Oct. 29, 2010.
PCT Application No. PCT/US2007/021339—ISR and IPRP dated Nov. 5, 2008.
U.S. Appl. No. 11/787,295—Final Rejection dated Oct. 24, 2008.
U.S. Appl. No. 11/787,295—Non-Final Rejection dated May 23, 2008.
U.S. Appl. No. 11/787,295—Notice of Allowance dated Feb. 24, 2009.
Malaysian Patent Application No. PI 20094244—Office Action dated Jun. 30, 2011.
Korean Application No. 10-2009-7021000—Office Action dated Apr. 21, 2011.
Chinese Application No. 200780052612.3—Office Action dated May 18, 2011.
Chang Ching
Nutter & McClennen & Fish LLP
Penny, V. John J.
Scuderi Group LLC
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