Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters
Patent
1997-09-22
1999-08-10
Brock, Michael
Electricity: measuring and testing
Impedance, admittance or other quantities representative of...
Lumped type parameters
324698, 73 5305, G01N 2702
Patent
active
059364149
ABSTRACT:
A brake oil detector is disclosed. It includes a housing formed with a through hole on one side, a circuit board disposed in the housing and having a wire extending through the through hole to outer side of the housing, a pivotable rotary shaft disposed in the through hole and an extension arm disposed at one end of the rotary shaft and having a free end disposed with a sensor connected to the circuit board by the wire. The sensor of the extension arm is extended into a brake oil tank to check out the viscosity of the brake oil and judge whether it is necessary to replace the brake oil.
REFERENCES:
patent: 4052667 (1977-10-01), Schwartz
patent: 5644239 (1997-07-01), Huang et al.
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