Internal combustion engine of the annular piston type and a center shaft for such an engine

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9261018
APP PUB NO 20130333659A1
SERIAL NO

13994614

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

The present invention provides a novel internal combustion engine of the annular piston type and a center shaft for such an engine for further improving the cooling an internal combustion engine of the annular piston type. The internal combustion engine comprises a block having at least one annular combustion chamber and an annular piston with a center chamber. The annular piston of the engine is configured to reciprocate in the combustion chamber. The internal combustion engine further comprises a center shaft being fixed to said block and configured to fit at least partially inside the center chamber of the annular piston. The center shaft comprises at least one passageway which is configured to lead fluid flow to and from the center chamber of the annular piston.

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddress
SALMINEN REIJOBELLINGHAM WA 98229

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Salminen, Reijo Bellingham, US 8 111

Cited Art Landscape

Load Citation

Patent Citation Ranking

Forward Cite Landscape

Load Citation

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
11.5 Year Payment $7400.00 $3700.00 $1850.00 Aug 16, 2027
Fee Large entity fee small entity fee micro entity fee
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00