×

Digital oil level sensor

  • US 4,745,893 A
  • Filed: 12/03/1986
  • Issued: 05/24/1988
  • Est. Priority Date: 12/03/1986
  • Status: Expired due to Term
First Claim
Patent Images

1. An oil level sensor suitable for use with internal combustion engines, transmissions, differentials, vehicular oil systems, and the like comprising:

  • a sensor body adapted to be mounted to the block, casing or the like of an oil-containing reservoir;

    a probe including a pair of electrodes forming a capacitor, said probe extending from said sensor body so as to at least partially immerse the capacitor in oil during normal conditions of use to detect the level thereof, at least one of said electrodes being substantially insulated so that the apparent capacitance of the capacitor is relatively insensitive to any change in the conductivity of the oil a high temperatures; and

    means responsive to the capacitance of said capacitor for signalling the level of the oil, said capacitance being a function of said oil level.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×