Intake throttle valve return device of engine
US4880207A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 13, 1988 |
| Grant date | Nov 14, 1989 |
| Priority date | — |
| Expiry date | Oct 13, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2009/0269
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A cup-shaped spring holder having a flange on the outer periphery on the open end side is secured on the end portion of a valve shaft which protrudes outwardly from a carburetor barrel, with a clearance for coil insertion provided between the barrel and the open-end side. An outer torsion coil spring is fitted in the aforementioned spring holder to restrain an axial shift of the spring. And one end of an inner torsion coil spring fitted on the aforementioned shaft end portion is led out through the aforementioned clearance and retained by a spring retainer on the aforesaid barrel. Because of the above-described constitution, this invention features simple construction, easy manufacture, increased mechanical strength, a less number of components parts required, easy assembly, and improved valve shaft strength.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.