Dashpot with fast idle device for carburetor throttle
US4182291A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 15, 1977 |
| Grant date | Jan 8, 1980 |
| Priority date | — |
| Expiry date | Nov 15, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7764
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A dashpot with a fast idle device for carburetor throttles comprises a dashpot for damping a rapid closing movement of the throttle and a fast idle device for causing an automobile to run at fast idle. The fast idle device has a vacuum chamber separated from an air chamber of the dashpot by a partition, and a rod passing through a hole made in the partition, which rod is secured to a diaphragm defining a part of the vacuum chamber and axially moved with vacuum induced into the vacuum chamber. For sealing a gap defined between the rod and the partition, there is provided with a resilent seal member which is disposed in the air chamber of the dashpot and comprises a first portion engaged with an annular groove made in the rod so that the first portion will move in conformity with the axial movement of the rod, a second portion disposed around the gap and airtightly contacting with the partition, and a third portion extending from the first portion to the second portion and having a shape such that the second portion is pressed on the partition more tightly with the vacuum increasing. The seal member is shaped for example like a cup.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.