Pneumatic tappet adjustment tool
US7600452B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 30, 2007 |
| Grant date | Oct 13, 2009 |
| Priority date | — |
| Expiry date | Mar 30, 2027 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01L1/22
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A tool for adjusting the tappet clearance in the valve actuation system of an internal combustion engine includes a screw adjustment portion that is driven by a pneumatic powered screw driver. The pneumatic power to the screw driver is regulated to cause the screw driver to position the screw so that the desired biasing force is present. The screw driver bit passes through the head portion of a torque limiting wrench which is used to loosen and tighten the jam nut that secures the tappet adjustment screw. The tool also has a pneumatic driven gripping mechanism to hold the screw driver bit in position and prevent inadvertent displacement of the tappet adjustment screw while the jam nut is tightened.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.