Assignee
SUNPOWER INC
US80 patents
Top patents by PatentIndex Score
US5342176AAug 30, 1994
Method and apparatus for measuring piston position in a free piston compressor
SUNPOWER INC271 citations99
US5775273AJul 7, 1998
Free piston internal combustion engine
SUNPOWER INC122 citations98
US5525845AJun 11, 1996
Fluid bearing with compliant linkage for centering reciprocating bodies
SUNPOWER INC204 citations97
US6170442B1Jan 9, 2001
Free piston internal combustion engine
SUNPOWER INC82 citations96
US6035637AMar 14, 2000
Free-piston internal combustion engine
SUNPOWER INC70 citations96
US5502968AApr 2, 1996
Free piston stirling machine having a controllably switchable work transmitting linkage between displacer and piston
SUNPOWER INC59 citations96
US5496153AMar 5, 1996
Method and apparatus for measuring piston position in a free piston compressor
SUNPOWER INC98 citations96
US5156005AOct 20, 1992
Control of stirling cooler displacement by pulse width modulation of drive motor voltage
SUNPOWER INC71 citations96
US5148066ASep 15, 1992
Linear generator or motor with integral magnetic spring
SUNPOWER INC78 citations96
US4649283AMar 10, 1987
Multi-phase linear alternator driven by free-piston Stirling engine
SUNPOWER INC70 citations96
US4642547AFeb 10, 1987
Adaptive regulation system for a linear alternator driven by a free-piston stirling engine
SUNPOWER INC89 citations96
US4602174AJul 22, 1986
Electromechanical transducer particularly suitable for a linear alternator driven by a free-piston stirling engine
SUNPOWER INC118 citations96
US5537820AJul 23, 1996
Free piston end position limiter
SUNPOWER INC58 citations95
US6536326B2Mar 25, 2003
Control system and method for preventing destructive collisions in free piston machines
SUNPOWER INC64 citations94
US6293184B1Sep 25, 2001
Gas bearing and method of making a gas bearing for a free piston machine
SUNPOWER INC57 citations94
US5715693AFeb 10, 1998
Refrigeration circuit having series evaporators and modulatable compressor
SUNPOWER INC78 citations94
US5642622AJul 1, 1997
Refrigerator with interior mounted heat pump
SUNPOWER INC52 citations94
US4183214AJan 15, 1980
Spring and resonant system for free-piston Stirling engines
SUNPOWER INC73 citations93
US6684637B2Feb 3, 2004
Parallel slot heat exchanger
SUNPOWER INC31 citations92
US5873246AFeb 23, 1999
Centering system for free piston machine
SUNPOWER INC22 citations92
US5592073AJan 7, 1997
Triac control circuit
SUNPOWER INC46 citations92
US5450521ASep 12, 1995
Pulse width modulator
SUNPOWER INC39 citations92
US5385021AJan 31, 1995
Free piston stirling machine having variable spring between displacer and piston for power control and stroke limiting
SUNPOWER INC33 citations92
US5003777AApr 2, 1991
Asymmetric gas spring
SUNPOWER INC39 citations92
US4945726AAug 7, 1990
Leaky gas spring valve for preventing piston overstroke in a free piston stirling engine
SUNPOWER INC47 citations92
US4926123AMay 15, 1990
Precision variable pitch compensation winding for displacement transducer
SUNPOWER INC24 citations92
US4888951ADec 26, 1989
Phase synchronization and vibration cancellation for free piston Stirling machines
SUNPOWER INC36 citations92
US4866378ASep 12, 1989
Displacement transducer with opposed coils for improved linearity and temperature compensation
SUNPOWER INC32 citations92
US4802332AFeb 7, 1989
Sliding surface lubrication particularly advantageous for a free piston stirling engine
SUNPOWER INC35 citations92
US4404802ASep 20, 1983
Center-porting and bearing system for free-piston stirling engines
SUNPOWER INC35 citations92
US8960655B2Feb 24, 2015
Compact flexure bearing spring for springing multiple bodies
SUNPOWER INC24 citations91
US7453241B2Nov 18, 2008
Electronic controller matching engine power to alternator power and maintaining engine frequency for a free-piston stirling engine driving a linear alternator
SUNPOWER INC20 citations91
US6920967B2Jul 26, 2005
Controller for reducing excessive amplitude of oscillation of free piston
SUNPOWER INC20 citations91
US6199381B1Mar 13, 2001
DC centering of free piston machine
SUNPOWER INC52 citations91
US6038874AMar 21, 2000
Refrigeration circuit having series evaporators and modulatable compressor
SUNPOWER INC40 citations91
US6446336B1Sep 10, 2002
Heat exchanger and method of constructing same
SUNPOWER INC21 citations90
US4583364AApr 22, 1986
Piston centering method and apparatus for free-piston Stirling engines
SUNPOWER INC26 citations90
US4623808ANov 18, 1986
Electromechanical transducer particularly suitable for a linear alternator driven by a free-piston Stirling engine
SUNPOWER INC44 citations89
US5461859AOct 31, 1995
Centering system with one way valve for free piston machine
SUNPOWER INC37 citations88
US5642088AJun 24, 1997
Magnet support sleeve for linear electromechanical transducer
SUNPOWER INC32 citations87
US6993917B2Feb 7, 2006
Coupling for heat transfer member
SUNPOWER INC32 citations86
US4330992AMay 25, 1982
Drive mechanism for Stirling engine displacer and other reciprocating bodies
SUNPOWER INC40 citations86
US7685818B2Mar 30, 2010
Connection of a free-piston stirling machine and a load or prime mover permitting differing amplitudes of reciprocation
SUNPOWER INC9 citations84
US7511459B2Mar 31, 2009
Controller computing a virtual tuning capacitor for controlling a free-piston stirling engine driving a linear alternator
SUNPOWER INC10 citations82
US7409833B2Aug 12, 2008
Dual mode compressor with automatic compression ratio adjustment for adapting to multiple operating conditions
SUNPOWER INC16 citations82
US7372255B2May 13, 2008
Detection of the instantaneous position of a linearly reciprocating member using high frequency injection
SUNPOWER INC15 citations82
US7210312B2May 1, 2007
Energy efficient, inexpensive extraction of oxygen from ambient air for portable and home use
SUNPOWER INC11 citations82
US7000390B2Feb 21, 2006
Stirling cycle engine or heat pump with improved heat exchanger
SUNPOWER INC13 citations82
US6782700B1Aug 31, 2004
Transient temperature control system and method for preventing destructive collisions in free piston machines
SUNPOWER INC16 citations82
US4864232ASep 5, 1989
Temperature compensation for displacement transducer
SUNPOWER INC22 citations82
Showing the top 50 of 80 patents by PatentIndex Score.