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Патент USA US3089168

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May 14, 1963
|_. G. POWERS
3,089,158
WATER SKI
Filed Feb. 10, 1961
LAURENCE/N VE
a.N POWERS
NE VS
United States Patent 0 “ice
3,li89,158
Patented May 14, 1963
2
1
strips 22 attached to the ski by screws 24 which extend
through the top metal sheet 10 and into the laminated
3,089,158
WATER SKI
Lawrence G. Powers, Hayward, Calif., assignor to
Whittlesey Powers, Inc, Hayward, Calif., 21 corpora
wood body 16.
The heel-binding member 20 is mounted on a ratchet
plate '26 which is adjustably lreceived in .a metal track 28.
A leaf spring 30 is attached to the track by a screw 32 and
tion of California
Filed Feb. 10, 1961, Ser. No. 88,358
extends through the edge of the track to engage in the
7 Claims. (Cl. 9-310)
ratchet notches 34 on the plate 26 and lock the plate 26
against rearward movement in the track 28. A suitable
This invention relates to skis and more particularly to
10 ?nger :36 is provided on the spring 30‘ to permit manual
water skis.
withdrawal of the spring from the notches 34. The heel
It is a principal object of this invention to provide water
bindin'g track is attached to the ski by a plurality of screws
skis having the same general shape and dimensions as
38 extending through the top sheet 10 of the ski and into
conventional water skis so that they ‘look and function in
the wood body 16. A support strap 40‘, adjustable in
popular with today’s sportsmen but which will present a 15 length if desired, may be provided interconnecting the
heel and toe binding members.
new and pleasing appearance to sportsmen and which will
a manner similar to water skis which are accepted by and
be easier to use than conventional water skis.
‘It is another principal object of the invention to provide
such water skis which will be stronger and will withstand
more wear than conventional water skis.
it is another principal object of the invention to pro
As best illustrated in FIGS. \1 and 3, a cavity is pro
vided inside the ski between the top and bottom sheets 10
and '12 and peripherally enclosed by the laminated wood
20 body 16.
The cavity has a narrow portion 42 which ex
tends under the ski binding and between the two rows of
screws :24 and an enlarged portion 44 disposed between
the narrow portion 42‘ and the forward tip of the ski. The
cavity formed of portions 42 and ‘44 is ?lled by a body of
vide an improved water ski with which the water skier
can start water skiing more easily than with conventional
water skis.
It is a more speci?c object of the invention to provide 25 buoyant material preferably impermeable plastic foam of
sut?ciently high volume and low density that the ski will
water skis which are similar in appearance and durability
?oat in water. The body of buoyant material is of suf?
to high quality snow skis made of metal but which are par
ticularly suited for use as water skis instead of snow skis.
it is another speci?c object of the invention to provide
‘ciently low volume and high density that the ski will be
submerged in water when a skier is standing thereon and
Depending upon fac
tors such as density and volume of the remainder of the
such water skis which are made of metal but which are 30 is not moving through the water.
sul?ciently buoyant that they can be recovered easily when
the water skier falls while skiing.
It is another speci?c object of the invention to provide
materials in the ski, the volume and density of the body
of buoyant material are preferably chosen so that the body
will support about one-half to about ten pounds in water.
such water skis which are su?iciently buoyant to float but
which will sink when worn by a stationary water skier 35 The density of the buoyant material in the cavity is less
and which when thus submerged will automatically orient
themselves to facilitate the skier’s rise to the surface when
a boat starts to pull him.
~
It is another object of the invention to provide such
water skis which are structurally strong and may be manu
factured easily and efficiently.
Other objects and advantages of the invention will be
come apparent from the following description read ‘in con
junction with the attached drawings in which:
than the density of the laminated wood body '16.
As illustrated in FIG. 1 the majority, and preferably
about two-thirds of the body of buoyant material in the
cavity is disposed between the center of the ski binding
and the forward tip- 16 of the ski. Accordingly, when a
water skier is wearing the ski and is stationary in the
water, the buoyancy of the buoyant body in the cavity will
cause the skis to incline themselves with the forward ends
vof the skis extending upwardly toward the surface of the
FIG. 1 is a top plan view of a water ski constructed in 45 water. When thereafter a boat starts to pull the skier, the
skis will be automatically in position to plane to the sur
accordance with this invention, the ski being one of a pair
face of the water, lifting the skier into position above the
of identical skis;
'water.
FIG. 2 is an edge view of the ski of FIG. 1, and
it should be noted that in order to obtain su?icien-t vol
FIG. 3 is an exploded perspective view of the central
50 ume of the buoyant material in the ski and have the ma
portion of the ski of FIGS. 1 and 2.
jority of that material between the center of the ski and
Referring now in detail to the drawing, the ski of the
the forward tip thereof without increasing the dimensions
invention is constructed of upper and lower elongated
‘of the ski excessively, it is desirable for a portion of the
sheets 10 and 12 of aluminum which are preferably treated
cavity to extend under the ski binding. It is for this
to resist corrosive attack by salt water. One end of each
of the sheets 10 and 12 is curved upwardly to de?ne the 55 reason that the narrow portion 42 of the cavity is provided.
The portion 42 is made narrower than the portion 44 in
forward tip 14 of the ski. A body of laminated wood 16
order to strengthen the portion of the ski which supports
is disposed between the sheets 10 and .12 and is attached
to the sheets 10' and 12. ‘by suitable means such as cement
the sk-ier’s foot and in 1order that the screws 24 and 38
can be anchored in the wooden body 16 thereby producing
and screws. The sheets ‘10 and F12, and the wood body
16 are made of proper dimensions so that the ski is sub 60 a ski which is more easily manufactured.
While a speci?c embodiment of the invention has been
stantially identical to ‘conventional water skis in shape,
illustrated and described herein, it is obvious that many
length, width and thickness, the thickness of the ski meas
ured perpendicular to the bottom sheet 12 being substan
modi?cations may be made in the embodiment illustrated
without departing from the spirit and scope of the inven
tially less than the width of the ski.
The width of the ski is preferably within the range of 65 tion.
?ve to eight inches in order that each of the skier’s feet
What is claimed is:
can be supported centnally of a ski without the two skis
l. A ‘water ski comprising a pair of elongated and gen
interfering ‘with each other.
er-ally parallel sheets of metal de?ning the top and bottom
A ski binding is mounted on the top sheet 10 of the
of the ski, one end of each of said sheets being curved to
ski about midway in its length and comp-rises a toe-bind
ward the top of the ski to de?ne the forward tip of the
ing member 18 and a heel-binding member ‘20. The toe
ski, the sheet de?ning the top of the ski having a generally
binding member ‘18 is secured to the ski by a pair of metal
3,089,158
4
central area adapted to support the foot of a water skier,
generally parallel sheets of a material having a speci?c
generally rigid spacing means between said sheets and
mounting said sheets togther with the thickness of said
ski being less than the width of the ski, said spacing means
de?ning a cavity between said sheets with substantially
more than half of .the volume of said cavity positioned be
tween'said forward tip and said central area, and a body
of buoyant material ?lling said cavity, said buoyant ma
gravity greater than unity with the sheets de?ning the top
and bottom of the ski, one end of each of said sheets being
curved toward the top of the ski to de?ne the ‘forward tip
of the ski, the sheet de?ning the top of the ski having a
generally central ‘area adapted to support the foot of a
water skier, generally rigid spacing means between said
sheets ‘and mounting said sheets together with the thick
terial being of su?‘icient bulk and lightness that said ski
ness :of said ski being less than the width of the ski, said
will ?oat in water.
10 spacing means de?ning a cavity between said sheets with
2. The water ski of claim 1 characterized further in
that the bulk of said buoyant material is less than the
substantially more than half of the volume of said cavity
positioned between said forward tip and said central area,
and a body of buoyant material ?lling said cavity, said
buoyant material being of su?‘icient bulk and lightness that
bulk necessary to float the ski and a water skier in water.
3. The waterski of claim 1 characterized ‘further by the
inclusion or" a ski binding mounted on the top of said ski 15 said ski will ?oat in water.
overlying said central area.
7. A water ski comprising a pair of elongated “and gen
4. The water ski of claim 3 in which said body of buoy
erally parallel sheets of a material having a speci?c grav
ity greater than unity with the sheets de?ning the top and
bottom of the ski, one end of each of said sheets being
ant material includes a narrow portion thereof extending
through the central area of said ski and ‘an enlarged por
tion positioned between said narrow portion and said for
curved toward the top of the ski to de?ne the forward tip
of the ski, the sheet de?ning the top of the ski having a
generally central area adapted to support the foot of a
water skier, generally rigid spacing means between said
sheets and mounting said sheets together with the thick
erally parallel sheets of aluminum de?ning the top and bot 25 ness of said ski being less than the width of the ski, and
tom of the ski, one end of each sheet being curved toward
a buoyancy cavity bounded by said sheets and said spac
the top of the ski to de?ne the forward tip of the ski, the
ing means with substantially more than half of the volume
sheet de?ning the top of the ski having a generally central
of said cavity positioned between said forward tip and said
area adapted to support the foot of a water skier, a body
central area, and with said ‘cavity having sufficient volume
of laminated wood positioned between said sheets and at 30 and lightness that said ski will ?oat in water.
tached to said sheets with the thickness of the ski thus
formed being substantially less than its width, said body
References Cited in the ?le of this patent
of laminated wood being provided with a cavity therein
UNITED STATES PATENTS
ward tip, and said ski binding is attached to said spacing
means between the edge ‘of the ski and said narrow por
tion.
5. A water ski comprising a pair of elongated and gen
having a narrow portion adjacent to said central area and
an enlarged portion between said central area ‘and said 35
forward tip of said ski with the volume of said enlarged
portion exceeding the volume of said narrow portion, a
body of impermeable buoyant material ?lling said cavity,
and a ski binding positioned on said central area of the
aluminum sheet de?ning the top of the ski with a plurality
of screws attaching said binding to said laminated wood
along the sides of said narrow portion of said cavity.
6. A water ski comprising a pair of elongated and
1,104,441
1,628,368
Nelsen ______________ __ July 21, 1914
Lease _______________ _._ May 10, 1927
2,716,246
2,933,740
Billingharn __________ __ Aug. 30, 1955
Maples ______________ __ Apr. 26, 1960
2,940,090
Fournier ______________ __ June 4, 1960
65,793
France _______________ __ Nov. 9, 1955
40
FOREIGN PATENTS
(1st addition to No. 1,013,462)
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