Carburetor needle valve adjustment limiter cap and method of adjusting fuel flow
US5236634A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1992 |
| Grant date | Aug 17, 1993 |
| Priority date | — |
| Expiry date | Sep 23, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7062
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A cap and method for limiting the range of adjustment of a fuel flow metering valve in a carburetor. The cap has a body with an arm projecting generally radially outwardly therefrom to abut against a stop carried by the carburetor to limit valve rotation and a passage therein for telescopically axially receiving the head end of a shank of the valve. Portions within the passage enable the cap to be retained on the shank of the valve in a freely rotating first position during assembly and arm orientation, in a second position securing the cap to the valve to limit adjustment and maintain emissions calibration, and in a third position to releasably drivingly engage the valve to perform fuel flow adjustment before securing the cap to the valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.