Paccar Inc.

Jeffrey E Paul

Huston R Marlowe

Charles E Koske

James P Bingaman

Richard D Chapman

A modular cab/sleeper structural assembly (31) for a truck-tractor vehicle (30) is provided which improves ride quality and structural integrity without substantially increasing the overall weight or sacrificing any advantages of separate cab and sleeper units. The assembly (31) includes a chassis frame (33) extending substantially longitudinal of the vehicle (30) and a cab unit (35) having a cab structural assembly (37) mounted to the chassis frame (33) by a first mount (42). A sleeper unit (38) having a sleeper structural assembly (40) is mounted to the chassis frame (33) by a second mount (43). A coupling member (41), coupled between the cab structural assembly (37) and the sleeper structural assembly (40) and independent of the chassis frame (33), rigidly couples the sleeper structural assembly (40) and the cab structural assembly (37) together to produce a substantially unified composite structure for increased structural integrity. A method for improving ride quality and structural integrity of the modular cab/sleeper structural assembly (31 ) is also provided.

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Union City, CA, United States of America

Jeffrey E Paul