Low oil warning circuit
US4684917A · kind A · utility
12Cited by
2References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 16, 1986 |
| Grant date | Aug 4, 1987 |
| Priority date | — |
| Expiry date | May 16, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01M11/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An ignition powered indicator system for detecting and audibly alerting an operator of a low oil condition associated with an internal combustion engine for apparatus such as a lawn mower, pump, generator, tractor and the like. The indicator system includes a low oil switch mounted on the engine crankcase housing and connected in circuit with a buzzer, diode, and capacitor with the ignition primary. When the oil level is too low, the switch closes shorting the ignition primary to shut off the engine and produce an intermittent beeping sound, namely, one beep per ignition pulse, alerting the operator of the low oil condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.