Amphibious vehicle with improved cleat design
Patent 4846092 Issued on July 11, 1989. Estimated Expiration Date: 
August 13, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
August 13, 2007. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorApplicationNo. 07/085469 filed on 08/13/1987US Classes:440/12.64, Driven by sprocket-type wheel305/187, With detachable grouser for endless chain track305/34INFLATABLE MEANSExaminersPrimary: Peters, Joseph F. Jr.Assistant: Bartz, Clifford T. Attorney, Agent or FirmInternational ClassesB60F 3/00 (20060101)B62D 55/28 (20060101) B62D 55/18 (20060101) AbstractAn amphibious vehicle is comprised of pontoons, a drive system and endless tracks. The endless tracks are comprised of drive chains and hollow drive cleats in the shape of truncated pyramids.Other References
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