U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Icon_funbox Quotables

"What, sir, would you make a ship sail against the wind and currents by lighting a bonfire under her deck? I pray you, excuse me, I have not the time to listen to such nonsense."

Napoleon Bonaparte ; When told of the Robert Fulton steamboat

Newsletter  PatentStorm News

Make the Most of Our Site

See this month's Top Inventors and Most Cited Patents.

Stay on top of the latest innovations by subscribing to an RSS feed.

Registered users: Manage your profile.

 

Class 277/462 - Ports


Subclass of Class 277 - Seal for a joint or juncture
Definition: Axially spaced wherein the piston ring has through holes.
No. of patents: 9
Last issue date: 03/11/2008


NumberTitleIssue Date
7341447Delivering manganese from a lubricant source into a fuel combustion system
The present invention relates to an apparatus and method for delivering manganese from a lubricant source into a fuel combustion system or to the exhaust therefrom. By the present invention, manganese from the lubricant will interact with phosphorus, sulfur, and/or ...
03/11/2008
6959930Combination oil scrapper ring/gas seal assembly
A ring assembly, including a first oil scraper ring, a center oil scraper ring and a gas seal ring, adapted for disposition in a single groove of a packing cup which can be stationarily mounted over and around a reciprocally movable piston rod of a gas compressor. T...
11/01/2005
4655983Piston rings and their manufacture
A piston ring is formed by annular upper and lower parts which contact one another at respective surfaces normal to the axis of the piston ring. The parts can be injection moulded from thermoplastics materials with the parts themselves having no re-entran...
04/07/1987
4582328Double acting stirling engine piston ring
A piston ring design for a Stirling engine wherein the contact pressure between the piston and the cylinder is maintained at a uniform level, independent of engine conditions through a balancing of the pressure exerted upon the ring's surface and thereby ...
04/15/1986
4522412Oil ring with coil expander
A piston ring comprising a generally I shaped oil-scraping oil ring which has upper and lower side rails and a considerably thin web connecting the side rails, and which has an outer peripheral channel for receiving scraped oil and an inner peripheral gro...
06/11/1985
4235447Low friction oil control piston ring
A low friction oil control piston ring for an internal combustion engine has a cylinder engaging outer surface of shallow wave-like configuration having a plurality of spaced cylinder engaging annular ridges smoothly blended with intermediate shallow vall...
11/25/1980
4108448Piston ring assembly
Disclosed is a piston ring including a spacer-expander spring member. In a preferred embodiment the ring is of cast iron and includes two axially spaced cylinder wall contacting lands. At least one generally rectangular inwardly facing spring receiving re...
08/22/1978
4085490Method of making a rolled metal piston ring
A rolled steel oil control piston ring for internal combustion engines is of generally U-shaped cross section with a pair of opposed rigid sidewalls projecting inwardly of the ring from a central peripheral wall thereof. A pair of flat-faced solid scraper...
04/25/1978
4045036Piston oil control ring
In a composite oil control ring for reciprocating piston internal combustion engines which includes a relatively soft parted cast iron ring and an expander-spring disposed internally of the ring to bias the same into sealing engagement with a cylinder wal...
08/30/1977
 
Sign InRegister
Username  
Password   
forgot password?