Hydraulic and earth engineering – Marine vessel portage – launching – or removing – Lifting
Patent
1980-05-22
1982-03-09
Purser, Ernest R.
Hydraulic and earth engineering
Marine vessel portage, launching, or removing
Lifting
2804141, B60P 100
Patent
active
043186327
ABSTRACT:
An attachment for a boat lift to facilitate its placement and/or removal from a dockside location. A boat lift for small pleasure boats generally comprises a stationary framework which supports a movable boat supporting member and a winch or equivalent mechanism for elevating and lowering the boat supporting member relative to the stationary framework. The present invention comprises a set of wheels which are mounted on the stationary frame and normally retracted when it is desired that the boat lift rest upon the lake bottom or on shore. When it is desired to reposition the boat lift itself, a coupling is established between the wheel assembly and the boat supporting member so that when the boat lift's own winch mechanism is operated, the wheels are extended causing the weight of the boat lift to be supported on the wheels rather than upon the ground.
REFERENCES:
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patent: 3077742 (1963-02-01), Brown
patent: 3169644 (1965-02-01), Godbersen
patent: 3462781 (1969-08-01), Olvera
patent: 3753355 (1973-08-01), Knoch
patent: 3759409 (1973-09-01), Wenzel
patent: 3768677 (1973-10-01), Moss
patent: 3807591 (1974-04-01), Zinno
Haugen Orrin M.
Nikolai Thomas J.
Purser Ernest R.
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