Caterpillar Inc.

John C Spangler, Jr

Patrick William Laffan

Kristen Ann Gerstner

Michael S Contratto

Charles E Lewis, Ii

Florin M Marcu

Andrew J Stough

A suspension system for a mobile machine is disclosed. The suspension system may have a seat operatively connected to a cabin floor of the mobile machine, a cylinder connected between the seat and the cabin floor, and a spring associated with the cylinder. The suspension system may also have at least one valve configured to regulate fluid flow into and out of the cylinder, and a controller in communication with the at least one valve. The controller may be configured to detect a failure condition of the suspension system. In response to detection of the failure condition, the controller may be further configured to cause the at least one valve to move to a default position at which fluid flow into and out of the cylinder is restricted by an amount that still allows fluid flow through the at least one valve.

Seat suspension system having fail-safe functionality

An air induction system is provided for a work machine having at least one fender. The air induction system has an air inlet flow member and an air filter. The air filter is disposed within the at least one fender and accessible from outside of the work machine. The air filter is fluidly connected to and disposed downstream of the air inlet flow member. The air induction system also includes a conduit fluidly connected to and disposed downstream of the air filter.

Fender-accessible air filter

A height adjustment system for a seat assembly of a machine includes a first support member and a second support member vertically spaced from the first support member. A pneumatic bladder is operatively connected to the first support member and the second support member for adjusting a distance between the first support member and the second support member. At least two guide pins interconnect the first support member and the second support member at opposing ends thereof. A locking device maintains an adjusted distance between the first support member and the second support member. The height adjustment system is preferably independent from and may be positioned in series with a suspension system for the seat assembly.

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Pekin, IL, United States of America

John C Spangler, Jr