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Class 29/888.075 - Including grinding or honing


Subclass of Class 29 - Metal working
Definition: Process wherein the manufactured ring is shaped or polished
No. of patents: 9
Last issue date: 09/21/2010


NumberTitleIssue Date
7797829Oil ring, manufacturing method thereof, and piston structure using the oil ring
A method of manufacturing an oil ring is disclosed. The oil ring includes an annular oil ring body having a pair of rail portions at its axially upper and lower portions and butt ends, and a coil expander assembled in the inner periphery of the oil ring body. A numb...
09/21/2010
6199274Method of making oil scraper piston rings
A method of making an oil scraper piston ring includes the following steps of providing a base ring body including a circumferential web having flanks and an outer circumferential surface; galvanically depositing on the web a wear resistant hard chromium ...
03/13/2001
6154958Method of making piston rings
A method of making piston rings includes the following steps: forming a base body on a mandrel by thermally spraying a metal on the mandrel; applying a low-friction coating to the base body; removing the base body from the mandrel; and cutting rings from ...
12/05/2000
5966807Manufacturing piston rings
A method of manufacturing piston rings from a tube blank includes cutting a longitudinal slot in the tube blank, applying a force to the tube blank so that the slot is at least partially closed and the tube has a stressed shape, securing the stressed tube...
10/19/1999
5601476Method for precision-grinding a bezel at the inlet bore a workpiece
A method for precision-grinding a bezel at the inlet of a bore of a workpiece, comprising the following steps: a. generating a bezel at the inlet of the bore of the workpiece by grinding the workpiece at the inlet of the bore with a first grinding tool into a ...
02/11/1997
5405154Piston ring
A compression ring as a piston ring adapted to by received in an annular groove formed in a piston disposed in a cylinder assembly of an internal combustion engine includes an annular ring base member having a cutout portion, the ring base member having a...
04/11/1995
4758005Piston rings with a gap seal
A process for manufacturing a piston ring includes the step of forming a gap seal from an elongated member on one side and an "L-shape" on the other side; compressing the ring to close the gap seal and move the two ends into a nesting position; welding a ...
07/19/1988
4713867Piston rings with a gap seal
A process for manufacturing a piston ring includes the step of forming a gap seal from an elongated member on one side and an "L-shape" on the other side; compressing the ring to close the gap seal and move the two ends into a nesting position; welding a ...
12/22/1987
4192051Method for manufacturing fully sealed piston ring
For fabricating a compression piston ring, two identical split-ring members are formed, each having parallel planar side faces and a cylindrical outer edge face. For each ring member, circumferentially overlapping fingers are formed at the adjoining ends,...
03/11/1980
 
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