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Personal watercraft liftRelated Patent Categories: Hydraulic And Earth Engineering, Marine Vessel Portage, Launching, Or Removing, LiftingPersonal watercraft lift description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20070104539, Personal watercraft lift. Brief Patent Description - Full Patent Description - Patent Application Claims
BACKGROUND OF THE INVENTION [0001] This invention relates to lifting devices for watercraft, more particularly, to a lift for personal watercraft that is pivotally attached to a mooring piling above the surface of the water which allows the watercraft to be lowered into the water for use and then raised from the water and pivoted onto a dock for mounting, demounting storage and servicing. [0002] All watercraft owners know it is desirable that watercraft be stored out of the water to prevent defiling by barnacles, algae, and other waterborn plants and animals, as such requires expensive and time-consuming periodic cleaning of the bottom surfaces of the watercraft. Although there are watercraft lifts available to raise and store watercraft out of the water, many such lifts are at least partially submerged in water, which leads to defiling of the lift by aquatic plants and animals and shortens the life of the lift. Also, many prior lifts only lift the watercraft out of the water, but do not store it in an easily accessible position for cleaning, maintenance, and mounting or demounting during use. Furthermore, many such lifts require that the watercraft be elevated out of the water by manual means. However, as personal watercrafts often weigh an excess of 750 pounds, it is difficult to lift them without motorized means. [0003] Thus, there is a need for a watercraft lift that will address the above problems. [0004] The relevant prior art includes the following references: TABLE-US-00001 Patent No. (U.S. unless stated otherwise) Inventor Issue/Publication Date 5,749,313 Shackelford, Jr. May 12, 1998 1,695,674 Wilson Dec. 18, 1928 2,808,016 Jarnot Oct. 01, 1957 2,990,803 Henderson Jul. 04, 1961 2,979,014 Yordi Apr. 11, 1961 3,060,885 Nolf Oct. 30, 1962 3,177,839 Nolf Apr. 13, 1965 3,830,452 Seay Aug. 20, 1974 5,014,638 Ilves et al. May 14, 1991 5,301,628 Daskalides Apr. 12, 1994 GB 588,394 Lamb et al. May 21, 1947 [0005] Of the above patents only the Shackelford Jr., patent provides some of the advantages of the present invention. However, the present invention, contrary to the Shackelford, Jr., patent differs as it utilizes two separate brackets rather than a tubular housing, has fewer moving parts and is motorized. SUMMARY OF THE INVENTION [0006] The primary object of the present invention is to provide a personal watercraft lift that enables a personal watercraft to be raised and lowered into the water easily and quickly. [0007] further object of the present invention is to provide a personal watercraft lift that allows personal watercraft to be stored out of the water. [0008] An even further object of the present invention is to provide a personal watercraft lift that provides easy accessibility to the personal watercraft for mounting and demounting during use and for maintenance purposes. [0009] Another object of the present invention is to provide a personal watercraft lift that has fewer moving parts than watercraft lifts in the prior art. [0010] An additional object of the present invention is to provide as a personal watercraft lift that is easy to install and maintain. [0011] Yet another object of the present invention is to provide such as a personal watercraft lift that is motorized. [0012] A further object of the present invention is to provide a more secure piling attachment means. [0013] The present invention fulfills the above and other objects by providing a personal watercraft lift for use with a mooring piling having a mounting bracket for attaching the lift to the mooring piling above the surface of the water to which mounting brackets are attached. Both brackets are connected by a front plate and together serve as a guide means for an elongate lift mast. The lower of the two brackets has a roller on the inner side abutting the mast and the upper bracket has a slide block on the outer side so as to also abut the mast to result in a rolling and sliding movement of the mast between them. To the lower end of the mast is attached a cradle. The cradle is also attached by a cable to a motorized means mounted to the front plate of the bracket which allows the lift to be raised and lowered. The lift may be rotated in a lifting position over the body of water or inward to a storage position out of the water, preferably over a dock. A locking pin on the top bracket may be used to secure the lift underneath the lifting or the storage position. The cradle may contain optional vertical upright guards to keep personal watercraft from hitting the cable or the mast as well as crossbars for preventing the personal watercraft lift from moving laterally when it is positioned on the cradle. Further, a more secure piling attachment of the lift is achieved by attachment bolts being angled through the piling. [0014] The above and other objects, features and advantages of the present invention should become even more readily apparent to those skilled in the art upon a reading of the following detailed description in conduction with the drawing wherein there is shown and described illustrative embodiments of the invention. BRIEF DESCRIPTION OF THE DRAWINGS [0015] In the following detailed description, reference will be made to the attached drawings in which: [0016] FIG. 1 is a perspective view of the personal watercraft lift of the present invention when attached to a mooring piling as it would appear during use; [0017] FIG. 2 is a top view of the personal watercraft lift of the present invention during use showing a personal watercraft in broken lines in a lowered lifting position over water and a raised pivoted position over a dock and in a storage position; [0018] FIG. 3 is a side partial plan view of the personal watercraft lift of the present invention in a raid position; [0019] FIG. 4 is a front view of the watercraft lift with a cradle in a lowered position; [0020] FIG. 5 is a top view of a top partial plan view of the top mast guide bracket of the present invention; and [0021] FIG. 6 is a top partial plan view of the lower mast guide bracket with piling attachment method of the personal watercraft lift of the present invention. 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