초록 ▼

An actuator having a linear current force characteristic comprises a moving coil transducer and a hydraulic lever. The moving coil is capable of producing only a relatively low force but with a relatively large displacement. The coil is formed on a piston which acts as an input piston to a hydraulic

An actuator having a linear current force characteristic comprises a moving coil transducer and a hydraulic lever. The moving coil is capable of producing only a relatively low force but with a relatively large displacement. The coil is formed on a piston which acts as an input piston to a hydraulic level. An output piston has a much larger area than the input piston. Thus, the long throw, low force input to the hydraulic lever is converted into a short throw, high force output at the second piston.

대표청구항 ▼

An electromagnetic actuator comprising: an annular permanent magnet having a top end, a bottom end, and an inner surface; a first end-piece affixed coaxially to the top end of the annular permanent magnet: a dish-shaped second end-piece, having a disk portion with an aperture in its center, and wall

An electromagnetic actuator comprising: an annular permanent magnet having a top end, a bottom end, and an inner surface; a first end-piece affixed coaxially to the top end of the annular permanent magnet: a dish-shaped second end-piece, having a disk portion with an aperture in its center, and walls extending downwards, said dish-shaped second end-piece being affixed coaxially to the bottom end of the annual permanent magnet; a hydraulic lever for transforming the output of a transducer, wherein the hydraulic level comprises first piston means, comprising a tube having a closed end mounted coaxially with a column, for transmitting an input displacement, second piston means, having a disk portion and walls extending upwards from the disk portion, mounted coaxially within the second end-piece for transmitting an output displacement, and a chamber therebetween which serves as a reservoir for hydraulic fluid for said hydraulic lever; and a coil wound around the tube adjacent to the closed end of the tube, such that a portion of the coil is within the aperture.