Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Self lubricated non-sealed piston ring for IC engine fastener driving tool

A self-lubricating ring, non-sealing technology, applied to pistons, piston rings, nailing tools, etc., can solve problems such as adverse effects on market sales

Inactive Publication Date: 2003-04-02
ILLINOIS TOOL WORKS INC
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This may in turn have a negative impact on the market for this tool

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Self lubricated non-sealed piston ring for IC engine fastener driving tool
  • Self lubricated non-sealed piston ring for IC engine fastener driving tool
  • Self lubricated non-sealed piston ring for IC engine fastener driving tool

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] A non-sealing self-lubricating ring, a piston assembly using the non-sealing self-lubricating ring and an internal combustion engine using the piston assembly according to the present invention will be described below. In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be understood, however, that the invention may be practiced without these specific details. In other instances, well-known structures and devices are shown schematically in order to simplify the drawings.

[0023] Referring now to FIG. 1 , an internal combustion engine 10 is shown. Internal combustion engine 10 includes a cylinder and a reciprocating piston 12 . The cylinder includes a cylinder wall 11 and a cylinder head (not shown). The cylinder head, cylinder walls 11 and piston 12 together define a combustion chamber 19 into which fuel is injected for ignition or s...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A non-sealing, lubricating piston ring for lubricating the cylinder wall of a piston housing in a combustion tool is disclosed. The lubricating piston ring is made from a lubricating material such as polytetrofluroethylene (PTFE). The shape of the PTFE ring is designed to optimize the lubricity of the piston housing, while allowing enough friction for the piston to operate properly within the piston housing during reciprocating cycling movement. The PTFE ring may have radial fins extending from an outer surface thereof that are angled to promote ring rotations, such that the ring moves easily along and efficiently lubricates the inner cylinder wall of the piston housing. The PTFE ring does not form a seal between the piston and the housing. Instead, the PTFE ring is positioned above or below a sealing ring, such as a steel piston ring which forms the seal between the piston and the piston housing.

Description

technical field [0001] This invention relates generally to piston rings for lubricating the cylinder walls of piston chambers in fuel tools, and more particularly to piston rings made of self-lubricating materials. Background of the invention [0002] As is well known, commercially available piston rings are molded from wear resistant, low friction materials, such as self-lubricating materials, into the shape of self-lubricating sealing piston rings. Generally, such piston rings are manufactured from PTFE (polytetrafluoroethylene), a material with a very low coefficient of sliding friction, high thermal stability and satisfactory wear resistance properties. In fact, PTFE rings are used in most cordless internal combustion engine driven pneumatic nailers and air compressors. The presence of PTFE rings in the piston assembly of an internal combustion engine can eliminate the need for external lubricants and allow the engine to run on non-lubricated fuels, which are less expen...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): F02F5/00B25C1/08F16J9/20F16J9/26
CPCB25C1/08F02F5/00
Inventor 威廉罗伯茨克里斯H·波特
Owner ILLINOIS TOOL WORKS INC
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com