Free piston stirling engine
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 10, 2012
Grant Date -
May 28, 2009
app pub date -
Nov 26, 2008
filing date -
Nov 28, 2007
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A free piston Stirling engine, comprising a power piston fitted into a cylinder further includes: a support structure carrying moving magnets for a linear alternator; and a passive structure that at normal operating power and frequency produces a restoring force on the piston in the absence of contact with the cylinder. In one variation, the passive structure further comprises a mass suspended within the piston from at least one spring, such that the mass oscillates under influence of movement of the piston at normal operating power and frequency so as to produce the restoring force. In another variation, the passive structure further comprises: a magnet disposed outside the cylinder at a position and in an orientation to produce a field that opposes a field of a moving magnet carried by the support structure when the piston moves toward the magnet.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully