|6087945||Pump failure alarm system for hydraulic working machine|
A pump failure alarm system which is provided in a hydraulic working machine comprising hydraulic pumps driven by a prime mover, delivery lines joining with one another into one common delivery line on the downstream side, check valves provided in the del...
|5631632||Pressure monitoring system|
The invention is directed to a pressure monitoring system for monitoring a hydraulic pressure which is supplied from a fluid pump and accumulated in an accumulator. The pressure monitoring system includes an electric motor which drives the fluid pump to s...
|4187635||Method and apparatus for sound production|
An apparatus and method for producing sound, particularly unusual sound effects, wherein the apparatus comprises at least one diaphragm and a spring attached to the diaphragm, having a lowest resonance frequency less than 18 hertz. The apparatus includes ...