Invention Application
- Patent Title: PISTON RING FORMED FROM RING BLANK
- Patent Title (中): 活塞环从环形成
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Application No.: US13693472Application Date: 2012-12-04
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Publication No.: US20130154196A1Publication Date: 2013-06-20
- Inventor: Steven J. Sytsma , Timothy Andros , Robert J. Piccard
- Applicant: Mahle International GmbH
- Applicant Address: DE Stuttgart
- Assignee: Mahle International GmbH
- Current Assignee: Mahle International GmbH
- Current Assignee Address: DE Stuttgart
- Main IPC: B23P15/06
- IPC: B23P15/06 ; F16J9/00

Abstract:
A piston ring is formed from a ring blank, e.g., a wire, that has a cross sectional profile including upper and lower surfaces that are generally parallel and disposed between inner and outer peripheral faces. The cross sectional profile also includes a hook area at the outer portion of the lower surface that includes a nose area. The nose area is provided with a radius that is as sharp as possible, and is disposed such that a grinding operation performed on the lower surface, e.g., with a single generally planar grinding surface, will also grind the nose area, thereby truncating the nose area and increasing sharpness of the nose area without having to perform additional machining operations.
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