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111results about How to "Evenly supported" patented technology

Piezoelectric vibration gyro sensor and electronic device equipped with the same

A piezoelectric vibration gyro sensor includes: a) a piezoelectric vibration gyro element including: a central supporting portion having a plurality of electrode terminals provided thereon; a detection arm extending from two opposing sides of the central supporting portion and on a symmetry axis that passes through a center of the central supporting portion; a pair of connection arms extending from other opposing sides of the central supporting portion and in a direction orthogonal to the detection arm; and a pair of drive arms each extending from a tip of one of the pair of connection arms orthogonally to the respective connection arm and to both sides so that the pair of drive arms are symmetrically arranged with respect to the symmetry axis, wherein the central supporting portion, the detection arm, the pair of connection arms, and the pair of drive arms lie in a common plane; and b) a supporting substrate having a plurality of electrode leads one end of each of which is connected to a corresponding one of the plurality of electrode terminals to support the piezoelectric vibration gyro element, wherein the plurality of electrode terminals are disposed on a virtual circle whose center is a center of gravity of the piezoelectric vibration gyro element so as to be symmetrical with respect to the center of gravity, and wherein the plurality of electrode leads are each extended on an extension line that passes from the center of gravity through a central point of a corresponding one of the plurality of electrode terminals.
Owner:SEIKO EPSON CORP

Supercharger with outlet bars for rotor tip seal support

InactiveUS20090232689A1Improve serviceability and wear lifeLessen operative lifeOscillating piston enginesSealing arrangement for pumpsRotary-screw compressorSupercharger
The invention is to reduce flutter and wear and improve the serviceability and wear life of tip seals for roots blower and screw type compressor superchargers where used for improved supercharger output and efficiency. As the seals travel over the outlet opening, the seals move outward in their slots, leading to flutter which may shorten their useful lives. As each seal reaches the center of the outlet opening, it is forced back into its groove by engaging a valley of the mating rotor with the likelihood of increased wear. The invention provides longitudinally spaced support bars extending laterally across the opening in the directions of rotation of the rotors. The support bars have inner surfaces machined with the associated rotor cavity bores and thus smoothly support the seals as they ride over the support surfaces. The support reduces the flexing of the seals and the resultant wear. Each seal contacts a support bar only during inward motion to the center of the opening where the machined bores intersect and the seal is moving into a valley of the associated rotor of the pair. To reduce edge effect wear of the seals, the width of the support bars may be made narrower from the outer edges of the outlet opening to the center, where each seal loses contact with its respective support bar.
Owner:GM GLOBAL TECH OPERATIONS LLC
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