Lift axle control module

Details Lift axle control module Lift axle control module

2007-01-12

2010-06-15

Rivell, John (Department: 3753)

Fluid handling

Systems

Supply and exhaust

C137S596100, C137S596200, C280S086500, C091S457000

Reexamination Certificate

active

07735516

ABSTRACT:
A lift axle control module is disclosed that is simpler than prior art lift axle control systems, and does not require cycling the input pressure to the regulator. The module includes a housing fluidly connected to a first pressurized air supply and having one chamber with a load bladder port, a second chamber with a lift bladder port, and a common vent port. A pilot pressure is selectively provided for switching the module between the retracted and deployed modes. When the control module is set to the retracted mode, the lift bladders are pressurized to the system pressure, and the load bladders are vented. When the control module is set to the deployed mode, the lift bladders are vented and the load bladders are inflated and maintained at the regulated pressure.

REFERENCES:
patent: 4944526 (1990-07-01), Eberling
patent: 5973274 (1999-10-01), Zarchy
patent: 6554026 (2003-04-01), Focke et al.
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patent: 7416190 (2008-08-01), Sandbulte et al.
patent: 2003/0111810 (2003-06-01), Fulton et al.
patent: 2003/0151222 (2003-08-01), Sutton et al.
patent: 4319943 (1994-08-01), None

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