Marine propulsion – Self-propelled vehicle having land and water propulsion means – Having separated propulsion means for land and water
Reexamination Certificate
2008-01-01
2008-01-01
Basinger, Sherman (Department: 3617)
Marine propulsion
Self-propelled vehicle having land and water propulsion means
Having separated propulsion means for land and water
C440S012660
Reexamination Certificate
active
10851016
ABSTRACT:
Amphibious vehicle (1, FIG.1) has retractable road wheels (2, 2′, FIG.1). This may allow planing. During marine travel, at least one wheel may droop below the water line. This increases drag, particularly when cornering. Suspension height sensor22may be arranged to detect a threshold beyond which the wheel should not be allowed to droop over water, unless mode change is in progress. When this threshold is passed, pump18co-operates with controller15to pump fluid into lower chamber7′of actuator5to retract the wheel. Switchable valves9, 19, 21, and23are provided to allow adjustment of fluid chamber volumes. Gas filled accumulators11may be provided where a hydraulic suspension is used. Numeral42represents an adjustable trim tab. FIG.4shows an alternative fluid system layout, with valves19, 19′, and110to allow fluid to be returned to tank18′.
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Combined Search and Examination Report for Application No. GB0411569.7; Jul. 21, 2004.
Combined Search and Examination Report for Application No. GB0411570.5; Jul. 21, 2004.
Basinger Sherman
Calfee, Halter & Griswold LPA
Gibbs Technologies Ltd.
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