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专利名称：Damper action for upright piano with
sostenuto spring tab using tension from thedamper spring
发明人：Kirk Burgett,Jamie Marks,Dana Mazzaglia申请号：US13426353申请日：20120321公开号：US08614382B2公开日：20131224
专利附图：
摘要：A damper action for an upright piano that comprises a springed tab on thedamper lever that “ratchets” or gives way or folds away in one direction and does not
in the other, to provide retention when the spring tab passes by the longitudinal ridge onthe sostenuto rod in one direction and non-retention when the spring tab passes by thelongitudinal ridge on the sostenuto rod the other direction. The ratchet aspect of thespring tab uses tension from the damper spring and does not require a separate springto apply tension to yield the ratchet effect.
申请人：Kirk Burgett,Jamie Marks,Dana Mazzaglia
地址：Sacramento CA US,Haverhill MA US,Haverhill MA US
国籍：US,US,US
代理人：Craig A. Simmermon
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