Piston scraper ring
First Claim
1. A cylinder and reciprocable oil lubricated piston assembly equipped with an oil scraper ring including a radially washer (40) seated in a radial piston groove (223) and a scraping skirt (41) having a radially resilient truncated portion (14) with a base edge engaging the cylinder wall in a scraping line (16), characterized by the location of said base edge scraping line in or substantially close to the median plane (A--A'"'"') of said washer.
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Accused Products
Abstract
A cylinder and piston assembly with an oil scraper ring having a radially washer seated in a radial piston groove, and a scraping skirt having a radially resilient truncated portion with the base edge engaging the cylinder wall in a scraping line located in or substantially close to the median plane of the washer so as to avoid bending moments on the washer tending to interfere with its free radial movement in the piston groove as required to maintain uniform scraping contact with the cylinder wall.
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Citations
18 Claims
- 1. A cylinder and reciprocable oil lubricated piston assembly equipped with an oil scraper ring including a radially washer (40) seated in a radial piston groove (223) and a scraping skirt (41) having a radially resilient truncated portion (14) with a base edge engaging the cylinder wall in a scraping line (16), characterized by the location of said base edge scraping line in or substantially close to the median plane (A--A'"'"') of said washer.
- 15. A scraping ring for an oil lubricated piston sliding in a cylinder comprising a washer supporting a scraping skirt having a radially resilient truncated portion with a base edge for engaging the cylinder wall in a scraping line, characterized by the location of said base edge scraping line in or substantially close to the median plane of said washer.
Specification