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162results about How to "Small leakage" patented technology

Composite high-efficiency high-flow servo valve

The invention relates to a composite high-efficiency high-flow servo valve. The technical scheme is as follows: the servo valve consists of a composite flow valve and a composite magnetic control motor, two ends of the composite flow valve are respectively connected with a left haft part and a right half part of the composite magnetic control motor. A first electromagnetic converter [2] and a displacement sensor [44] are concentrically arranged in a left shell [3] from left to right in sequence; a valve core [5] is movably arranged in a valve sleeve [11] that is fixed in a valve body [8]; an angle displacement sensor [37], a second electromagnetic converter [19], a left sliding bearing [35], a gear shaft [28] and a right sliding bearing [29] are concentrically arranged in a right shell [17] from left to right in sequence; one side of the gearing shaft [28] is provided with a rack [31] that is meshed with the gear shaft [28]; and one end of the valve core [5] of the composite flow valve is in contact with an end surface of a first electromagnetic memorial alloy [45], and the other end of the valve core [5] is fixedly connected with a second magnetic control memorial alloy [36]. The servo valve has the characteristics of high frequency response, high reliability, high flow, small volume, small leakage, compact structure and high precision.
Owner:WUHAN UNIV OF SCI & TECH

Child's music-playing toothbrush configured for attractive display of graphics and improved sound quality

InactiveUS20080256730A1Improve sound qualityLittle internal leakageCarpet cleanersBrush bodiesStanding waveViolin
A music-playing toothbrush having a hollow handle housing containing suitable solid state electronic components for selectively playing a musical tune with improved sound quality. The sound quality is expressly addressed in the handle design with an interior sealed speaker enclosure configured to direct the sound toward the listener with little internal leakage and with an undulating violin-like cavity shape that suppresses internal standing waves. Moreover, the handle provides a relatively large, relatively flat, substantially uninterrupted surface for receiving attractive and motivational graphics such as licensed cartoon characters, which may be compatible with the musical selection.
Owner:WORLD TREND

Magnetic core element, magnetic core module and an indictive component using the magnetic core module

A rod-shaped magnetic core element, having a first end with a spherical or cylindrical recess or a spherical or cylindrical connecting protrusion, and a second end with a spherical or cylindrical recess or a spherical or cylindrical connecting protrusion so that a bent connection of at least two magnetic core elements is variably adjustable. Magnetic core elements comprising spherical or cylindrical magnetic core ends of this type allow a nearly gap-free construction with little magnetic leakage due to slightly larger end surfaces in comparison with ferrite rods having beveled plane end section surfaces. The enlarged end surface of the spherical surface advantageously allows a more stable connection of individual magnetic core elements without adhesive bonding. This allows the construction of flexible, multiple-member and inexpensive rod core coils and antennae.
Owner:SUMIDA COMPONENTS & MODULES
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