03961868 is referenced by 47 patents and cites 20 patents.

A small high speed direct connected motor compressor has a unitary piston and piston rod whereby the piston wobbles in the cylinder as the crank shaft rotates. The wobbling piston is sealed to the cylinder by a flanged disk of Teflon which forms both a seal and mechanical guide for the piston and which runs without lubrication in contact with a low-friction, surface-coated cylinder of high heat conductivity. The circular rim of the Teflon cup is warped from circular outline to elliptical outline twice per revolution while maintaining its seal with the walls of the cylinder. The structure involves small clearance spaces with consequent good efficiency.

Title
Air compressor
Application Number
5/444472
Publication Number
3961868
Application Date
February 21, 1974
Publication Date
June 8, 1976
Inventor
Richard Charles Bell
Sheboygan
WI, US
Arthur John Droege Sr
Sheboygan
WI, US
Agent
Johnson Dienner Emrich Wagner
Assignee
Thomas
WI, US
IPC
F04B 39/10
View Original Source