Note: Descriptions are shown in the official language in which they were submitted.
CLOSE~ TRAILER-BOAT ~IT~ RETRACTING W~EELS
F~e~d o~ ~he In~en~on
Closed trailer-boat with retracting wheels belongs to the
field of means of transportation, vehicles for special loads of
ob~ects transporting (B 60 P 3/10), more exactly for boats
transporting i.e. to the field of trailers not comprised
elsewhere (B 62 D 63/06).
Techn~ca~ P~ob~er
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Because of the vessels'size and dificulties to minimize
their dimensions, the problem of their out-of-water storage, appears.
The next problem arises with vessel transporting from the
storage location to the launching location and generally
concerning its transfer.
The closed trailer-boat with retracting wheels design,
~according to the invention, resolves simply and easily above
mentioned pxoblems.
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There axe certain solutions which were solving the problem
of the vessel transportation i.e. its transfer from one place to
another, by using special trailers, to which the vessels were
placed on, fixed, and then the trailer was connected to a vehicle.
The disadvantage of such solutions consists of the need to
design a special trailer for the certain vessel (for larger ships
stronger construc~ions are required etc.). This sort of
solution increases the above mentioned storage problem. That is
to say that besides the vessel storeroom, a space for vessel
transportation trailer storage has to be provided.
The disadvantage of such a solution is also the need for
cranes to mount the vessels ~QntO the trailers, as well as a
great time wasting for mounting or dismounting the vessel onto/off
the trailer, which requires an extensive preparation and a lot of
work force.
There are solutions which were solving the problem of
out-of-water vessel storage by means that the vessel was composed
of parts, instalied together before use, in order to form a unity.
The disadvantages of such solutions are for instance in
sealing of parts which form a unity when the vessel is in the water.
A solution is known,described in Yugoslav patent registration
P-196/79 A1, 28.12.1981., where a smaller boat is known, used as a
cover for closing a caravanning trailer which is also a boat set
onto a body with wheels, dimensions of which can be altered. In
folded-in position (i.e. transporting or standing position) it has
small dimensions, and due to the boat used as a cover also a
suitable aerodynamic shape.
The disadvantages of this solution are in boat small
d~mensions in need for special construction with Wheels and shock
absorbing devices, as well as with trestles for trailer hold-up
on camping site.
Closed trailer-boat with xetr~cting wheels accoxding to this
invention has so~ved the above mentioned tehnical problems and
disadvantages of the above described known solutions by means of
design explained in further text.
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DQ~ch~p;~on o6 ~:hQ So~u~on ~o ~hQ TQchn~c~ P~ob~m
The closed trailer-boat with retracting wheels according to
the invention consists of two parts which are folded-in in the
way that the boat in fact represents a closed trailer. The
retractable wheels installed in the lower part of the boat-trailer
make possible the transporting of such a folded trailer by
continental roads.
The design is shown on the drawing where:
Fig. 1 - shows the lateral view of the invention with a
half-cross-section on which situation of a wheel
in extended position can be seen;
Fig. 2 - shows the lateral view of the boat half-cross-section
on which situation of a wheel in retracted position
can be seen, while;
Fig. 3 - shows the view from above to the trailer-boat in
folded-out condition.
On Fig. 1 the rear half of the boat can be seen (lower part
of the trailer) 1, rotationalIy connected with the front part of
the boat (trailer cover) 2 by means of a hinge 3. Both parts are
placed on a shaft 4 with a clamp 5 attaching to a hook of the
tracting vehicle.
Several connecting screws 11 are situat'ed on the shaft 4,
as well as a connecting element 12 which joints the shaft 4 with
tube-like bracket of a torsional axle 6, crank arms 7 which are
carrying hubs with wheels on their ends. Wheels position adjusting
levers 3 are fixed to the torsional axle 6, having circlips 20 on
~heir tops, which serve to hold the wheels in positions
extended/retraced. Torsional axle tube-like bracket 6 is fixed
to the rear half of the boat (lower part of the trailer) 1 with
connecting elements 9. The rear half of the boat has got shaped
openin~s 1~ for wheels, closed with cover 13 :Erom the upper side.
There are strengthened holes on the lateral sides of the wheel
openings 1~ for the retxacted position 14, and respectively for
the extended position 15. Into these hoies ~14 and 15) the circlips
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on the wheel position adjusting levers are inserted.
To enable the use of the trailer-boat as a trailer, at the
back of the boat rear half 1 the metal framework brackets 17 for
light signalization 16 are mounted. They can be connected to the
electric installation of the tracting vehicle by means of a cable
with a plug 18. On Fig. 2 the lateral view of the trailer-boat
with retracted wheels is shown (circlip 20 has fixed the wheel
position adjusting lever 8 into the hole 14).
The front part of the boat (trailer cover) 2 is rotated
around the hinge 3, so that it leans by its whole leng~h onto the
shaft 4. By means of conr~ecting screws 11, pulled through the
boat bottom and nuts 19, it is fixed on the shaft 4.
Closed trailer-boat can be used as a boat, so that after
fixing the front part of the boat (trailer cover) 2 on the shaft 4,
the trailer-boat is pushed into the water. After that the covers 13
on the wheel position on the wheel openings 10 are removed, and
the wheel position a~usting lever 8 is unfastened from the hole 15
(extended wheel position) and put into the hole 14, where it is
fixed with circlips 20. Thus the crank arms with hubs and wheels 7
are retracted in the openings 10. After cover 13 closing, the
trailer-boat is readyfor use.
The Fig. 3 sh ws the upper view of the trailer-boat in
folded-out condition, so that the exact disposition elements can
be seen.
To make the trailer ready for traction, i.e. transportation,
the trailer-~oat has to be driven to shallow water. Then the covers
13 are removed from the wheel openings 1~, circlips 20 are
pulled-out, and the position adjusting levers are moved into the
strengthened holes 15 and fixed with circlips 20. Now the crank
arms with hubs and wheels are in lower position. The nuts 19 are
screwed off and the front part of the boat (trailer cover) 2
rotated the hinge 3, so that it covers the rear half of the boat 1.
Light signalization framework 16 is mounted on the metal
framework bracket 17, together with the cable and plug 18, whi~h
are connected to the electrical installation of the tracting vehicle.
The clamp S is mounted on the shaft 4, so the trailer can be
connected to the hook of the tracting vehicle.
