Land vehicles – Wheeled – Tiltable vehicles – stabilized by attendant or article
Patent
1984-11-20
1986-10-07
Mitchell, David M.
Land vehicles
Wheeled
Tiltable vehicles, stabilized by attendant or article
280 4317, 280767, 403107, 403109, B62B 104
Patent
active
046155341
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a removable foldable wheel support which, used in pairs and fixed to the rear of the boat, forms a device for putting the boat into water and hoisting it in. The device is especially useful for inflatable boats, but may be used for other purposes such as: transport of different sea craft and uses not related to sea craft.
Some known prior art removable wheel supports are removable rigid wheel supports in a single piece, which must be dismantled at sea and placed in the boat. Others are, hingedly fixed to the back board may be raised and fixed in an inoperative position, the supports being either substantially horizontal, the rearward wheel away from the back board, or vertical, the wheels being above the back board of the boat.
Others are telescopic, the wheel being raised and placed behind the back board by a movement both of horizontal rotation and of vertical translation.
These devices have certain disadvantages either because they comprise mechanical parts, rollers, and/or springs which are not readily compatible with sea water, or they must be dismantled at sea and placed in the boat where they take up space. The devices must be reassembled or handled for landing especially in the case of a heavy sea, wind or currents, or because mechanical elements project above the back board or take up space required for the big motors normally-mounted behind this board and form a hindrance for handling the boat.
Another disadvantage of some of these devices concerns positioning of the wheels in the operative position more particularly at sea before landing and for hauling in especially when the sea is high. Placing these wheels in the operative position is made difficult when inflatable tires are used, but such tires are, necessary because of their flexibility and, for transporting the boat onto the bank. However, immersion of the wheels comes up against the thrust of Archimedes and requires direct manual intervention forcing the buoyant tires down outside the boat.
This problem can only be solved by using wheels of a density greater than that of water, being heavy, hard and unsuitable for transport on land.
SUMMARY OF THE INVENTION
The wheel support of the invention avoids these disadvantages with prior wheels for boats.
Although it is removable, the support may remain fixed to the rear of the boat after it has been put in the water and may be folded rearwardly after unlocking by the simple fact of starting up the boat on the water. The devices then may be pulled upwards by means of a handle or a rope arranged in a closed loop for placing the wheel parallel to the inflatable pneumatic float and folded back completely against the back board, the upper part of the wheel being substantially at the upper part of the float, where upon the support is locked in this position.
The operation for opening out the support or bringing it into the operative position especially in a heavy sea for landing is simply achieved after unlocking by means of the same rope pulled in the opposite direction, the device being again locked in the folded out position for use for hauling in, transport on land and placing in the water again.
With the device of the invention, these three operations can be carried out without dismantling or reassembling from outside the boat and comprises no fragile part.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will be better understood with reference to the accompanying drawings in which:
FIG. 1 is a perspective view of one of the supports, fixed on the left hand side of the back board and folded out in operative position;
FIG. 2 shows the square tube serving as bolt and sliding inside the support of FIG. 1 for making the device fold or for maintaining it rigid;
FIG. 3 shows the support in a side view during folding;
FIG. 4 shows the inside of the fixed part of the support, the mobile part of the support being folded but not locked;
FIG. 5 shows the inside of the fixed part of the support, the mobile part of the support being folded and
REFERENCES:
patent: 3210783 (1965-10-01), Petty
patent: 4303254 (1981-12-01), Swanson et al.
Culbreth Eric
Mitchell David M.
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