Brakes – Internal-resistance motion retarder – Using diverse fluids
Patent
1996-07-02
1999-03-09
Oberleitner, Robert J.
Brakes
Internal-resistance motion retarder
Using diverse fluids
188267, 18832215, 26714014, F16F 906
Patent
active
058788514
ABSTRACT:
A controllable vibration apparatus having an electrical connection to a controllable valve made through a single-strand electrical conductor. In one embodiment, the piston and rod are preferably used as the source of ground or return electrical path. An axially compressed sealing element provides radial sealing against the conductor. An accumulator including a flexible diaphragm provides separation of fluid and accumulator chambers. In magnetorheological (MR) fluid dampers, a special sealing system including a relationship between piston rod surface finish and particle size is provided. A surface treated metal bushing is used with a lip seal to prevent escape of fluid and support side loads. The controllable valve can be formed from top and bottom pole pieces spaced from an outer ring to define a passageway. The pole and ring are preferably secured together by non-magnetic bridging elements. Preferably, the coil assembly is configured with integral axially-extending pins for ease of connection. Push-on connectors preferably make the connection between the conductor and pins. In a two single-strand conductor version, one single-strand carries the incoming current and the other the outgoing current.
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J.D. Carlson, D. M. Gatanzarite and K.A. St. Clair, "Commercial Magneto-Rheological Fluid Devices", 1995, Lord Corporation, LL-8001.
Lord Corporation, "Rheonetic Magnetic Fluid Systems", 1996, PB8003.
Carlson J. David
Chrzan Michael J.
Prindle Donald R.
St. Clair Kenneth A.
Lipka Pamela J.
Lord Corporation
Oberleitner Robert J.
Wayland Randall S.
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