Rotary shafts – gudgeons – housings – and flexible couplings for ro – Shafting – Particular vibration dampening or balancing structure
Reexamination Certificate
2011-03-29
2011-03-29
Binda, Greg (Department: 3679)
Rotary shafts, gudgeons, housings, and flexible couplings for ro
Shafting
Particular vibration dampening or balancing structure
C244S060000, C310S090500
Reexamination Certificate
active
07914383
ABSTRACT:
The invention relates to a rotorcraft transmission system that comprises both a transmission shaft (21), and electromagnetic induction members (30, 31) of an active magnetic damper that extend around the shaft and that co-operate therewith to determine radial clearance (33). The system further comprises an additional radial damper (35) extending around the shaft with radial spacing (29) that is smaller than the radial clearance, such that in the event of the active magnetic damper failing, radial displacements of the shaft relative to its axis (22) are damped at least in part by the additional radial damper, so that damage to the induction members is limited or avoided.
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patent: 2002/0065139 (2002-05-01), Krysinski
patent: 2005/0200219 (2005-09-01), Brunken
patent: 2 359 327 (1978-02-01), None
patent: 02 097742 (1990-04-01), None
patent: WO 99/50950 (1999-10-01), None
Binda Greg
Brooks & Kushman P.C.
Eurocopter
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