Tandem wheel suspension systems

Details Tandem wheel suspension systems Tandem wheel suspension systems

2005-12-13

2011-10-11

Culbreth, Eric (Department: 3616)

Land vehicles

Wheeled

Running gear

C280S008000, C280S680000, C280S681000, C280S686000, C280S687000, C280S124116, C280S124128

Reexamination Certificate

active

08033565

ABSTRACT:
A trailer tandem wheel suspension system comprising a pair of suspension units (3) for mounting on either side of a chassis (4) of a trailer (1) to support a pair of wheels2′, 2″and arranged to respond both to small and large deflections of the wheels2′, 2″. Each suspension unit (3) has a primary spring element (12) and a secondary spring element (13) linked to the primary spring element (12) so that the primary and secondary spring elements (12, 13) are effective over different ranges of movement of the wheels2′, 2″. The primary spring element (12) is a leaf spring responsive to small movements of the wheels2′, 2″and the secondary spring element (13) includes a compression spring (18) linked to the leaf spring and responsive to larger movements of the wheels2′, 2″.

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