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US 4,302,022 AGranted
High-low trailer
OwnerWilliam N. Schoeffler, Romona B. Schoefflerinventors
Life of this patent
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Abstract
A trailer bed having ground wheels at the rear and tractor engaging means at the front is formed of front and rear portions joined together by pivoted links, the rear portion being vertically movable relative to the front portion and the wheels to convert the trailer from a low-bed stepped configuration to a continuous flat bed configuration, and vice versa. A single cable is trained over pulleys on the bed portions and wheel mounts to effect simultaneous lifting or lowering of both ends of the rear bed portion.
Claims6
A trailer convertible from a stepped low bed trailer to a high flat bed trailer comprising:
- a trailer body having a front bed portion provided with means for attaching the same to a tractor and a rear bed portion having ground wheels journalled thereon;
- connecting means connecting said front and rear bed portions for relative vertical movement from a first position wherein said rear portion is lower than said front portion to a second position where said front and rear portions are substantially coplanar and define a continuous flat bed;
- means for elevating and lowering said rear portion relative to said wheels;
- and
- operating means for simultaneously moving the forward and aft ends of said rear bed portion vertically relative to said front bed portion, said means for elevating and lowering said rear bed portion comprising a carriage on which said wheels are journalled, front and rear struts pivoted to said carriage, at their lower ends, and having their upper ends slidably guided on said rear portion for movement toward and from each other.
2 more elements
Dependencies are inferred from the claim text.