U.S. patent number 3,928,872 [Application Number 05/507,001] was granted by the patent office on 1975-12-30 for leg support device for skiing.
Invention is credited to Albert F. Johnson.
United States Patent |
3,928,872 |
Johnson |
December 30, 1975 |
Leg support device for skiing
Abstract
A skiing device securable to each leg of a skier for providing
flexural knee and leg support. An upper support means positionable
about the skier's leg above the knee is interconnected by spring
means with a lower support means positionable about the skier's leg
below the knee. The spring means are securably maintained within
coupling means mounted to the upper and lower support means. In
this manner, with the skier in a crouched position, part of the
upper body weight is supported other than by the knees of the
skier, and the skier can more easily absorb bumbs while maintaining
better balance and control over the skies.
Inventors: |
Johnson; Albert F. (Spenard,
AK) |
Family
ID: |
24016876 |
Appl.
No.: |
05/507,001 |
Filed: |
September 18, 1974 |
Current U.S.
Class: |
2/22; 280/809;
36/117.1; 280/11.36; 602/16 |
Current CPC
Class: |
A61F
5/0106 (20130101); A63B 69/18 (20130101) |
Current International
Class: |
A61F
5/01 (20060101); A63B 69/18 (20060101); A41D
013/00 () |
Field of
Search: |
;2/22 ;36/2.5AL
;128/8C,8F |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Guest; Alfred R.
Attorney, Agent or Firm: Graybeal, Barnard, Uhlir &
Hughes
Claims
What is claimed is:
1. A leg support device securable to the leg of a skier,
comprising:
upper support means positionable to engage the rearward portion and
sides of the skier's leg above the knee, and including means for
securing said upper support means to the skier's leg;
lower support means positionable about the skier's leg below the
knee, and including means for securing said lower support means to
the skier's leg; and
spring means interconnecting the sides of said upper and lower
support means, said spring means being in an essentially unstressed
condition when the device is thus secured to the skier's leg and
the leg is only slightly bent, and being in a stressed condition
when the leg and the spring means are relatively sharply bent,
which stressed condition tends to relatively straighten said spring
means.
2. The device according to claim 1, wherein said spring means
comprises a pair of beam spring members, one arranged at each side
of said support means.
3. The device according to claim 2, wherein said beam spring
members comprise spring bars maintained generally parallel with the
skier's leg when said device is secured thereto.
4. The device according to claim 1, wherein said upper support
means comprises a substantially rigid concave plate positionable
about the rearward portion of the skier's leg immediately above the
knee.
5. The device according to claim 4, wherein said means for securing
said concave upper leg plate to said skier's leg comprises lacing
means securable to each edge of said upper leg plate for passing
over the forward portion of said skier's leg above the knee.
6. The device according to claim 4, wherein said means for securing
said concave upper plate to said skier's leg comprises a plurality
of straps each secured to each edge of said plate for passing over
the forward portion of said skier's leg above the knee, and
adjustable buckle means interposed intermediate the length of each
said strap.
7. The device according to claim 1, wherein said lower support
means comprises a substantially rigid concave plate securable to
the skier's leg below the knee and includes lacing means securable
to each edge of said concave lower leg plate for passing over the
forward portion of said skier's leg subjacent the knee.
8. For use by securement to the legs of a skier, a pair of leg
support devices as claimed in claim 1.
9. A leg support device securable to the leg of a skier,
comprising:
upper support means positionable to engage the rearward portion and
sides of the skier's leg above the knee, and including means for
securing said upper support means to the skier's leg;
lower support means positionable about the skier's leg below the
knee, and including means for securing said lower support means to
the skier's leg; and
spring means interconnecting the sides of said upper and lower
support means, said spring means having an essentially unstressed
condition when the device is thus secured to the skier's leg and
the leg is only slightly bent, and having a stressed condition
tending to support a portion of the weight of the skier when the
skier is in a crouched position.
10. A leg support device securable to each leg of a skier,
comprising:
upper support means including a substantially rigid concave plate
positionable about the rearward portion of the skier's leg above
the knee, and means for securing said upper support means to the
skier's leg, and further including spring member coupling means
mounted on said upper support means;
lower support means including a substantially rigid concave plate
positionable about the rearward portion of the skier's leg below
the knee and means for securing said lower support means to the
skier's leg, and further including spring member coupling means
mounted on said lower support means; and
beam spring members interconnecting the coupling means on said
upper and lower plates and arranged on both sides of the skier's
leg when said device is secured thereto.
11. The device according to claim 10, wherein the intermediate
portions of said beam spring members located between said upper and
said lower plates are permanently slightly bent so that the skier
tends to maintain his knees in flexed position when said device is
positioned on the skier's leg.
12. The device according to claim 10, wherein said coupling means
comprises U-shaped brackets mounted on each side of each of said
upper and lower plates, each of said brackets having projecting ear
portions for removably securing said beam spring members to said
plates.
13. The device according to claim 10, wherein said coupling means
mounted to said upper plate comprises two concave members securely
mounted about the upper and lower portions of said plate, each of
said members terminating at each end in a channel through which a
beam spring member passes.
14. The device according to claim 10, wherein said coupling means
mounted to said lower plate comprises tubular members disposed
along each edge of said lower plate through which said beam spring
members pass, each of said beam spring members having swaged
fittings disposed immediately above and below said tubular member
to prevent slippage of said beam spring member therethrough.
15. For use by securement to the legs of a skier, a pair of leg
support devices as claimed in claim 10.
16. A leg support device securable to each leg of a skier,
comprising:
upper support means comprising a substantially rigid concave plate
positionable about the rearward portion of the skier's leg
immediately above the knee and including means for securing such to
the skier's leg, and further including a projecting tongue portion
extending toward the skier's waist when said device is so
secured;
lower support means positionable about the skier's leg below the
knee including means for securing said lower support means to the
skier's leg; and
spring means interconnecting said upper and lower support means,
the said spring means being in a stressed condition when relatively
sharply bent, which stressed condition tends to relatively
straighten said spring means, the said projecting tongue portion of
the upper support means engaging the rearmost portion of the
skier's leg to provide maximum leverage under such stressed
condition.
17. A leg support device securable to each leg of a skier,
comprising:
upper support means positionable about the skier's leg above the
knee including means for securing such to the skier's leg;
lower support means comprising a substantially rigid concave cuff
positionable about the rearward ankle portion of the skier's leg
exterior to the skier's boot, and including means for securing said
lower support means thereto; and
spring means interconnecting said upper and lower support means,
said spring means being in a stressed condition when relatively
sharply bent, which stressed condition tends to relatively
straighten said spring means.
18. The device according to claim 17, wherein said means for
securing the lower concave cuff to the rearward ankle portion of
said skier's leg exterior to the skier's boot comprises a strap
secured to each edge of said cuff for passing over the forward
portion of said skier's boot, and adjustable buckle means
interposed intermediate the length of said strap.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to skiing devices and more
particularly to a device which provides flexibility and support for
the skier's legs.
2. Description of the Prior Art
In the sport of skiing and in particular downhill snow skiing, a
skier's knees are quite important inasmuch as they are constantly
bent and must support the entire upper body weight. Furthermore,
the knees are continually flexed to absorb the shock of bumps as
well as to weight and unweight the skis while making parallel
turns. Due to this, it is highly desirable to have a device which
supports the knees by transferring some of the upper body weight to
the lower legs as well as aid the knees in flexing during
skiing.
A number of leg and/or knee support devices are known, such as
those disclosed in U.S. Pat. No. 3,055,359, No. 3,589,359, No.
3,669,105 and No. 3,677,265. None of these devices, however, are
designed particularly for use in skiing. Furthermore, none of the
prior devices aid in knee flexing or provide for weight
transference to the lower leg. Rather, these devices are designed
to restrict in one fashion or another movement of the knee and/or
leg, mainly for medical reasons.
SUMMARY OF THE INVENTION
It is, therefore, a primary object of the present invention to
provide a device for use by a skier which reduces the weight load
carried by the knees.
It is another object of the present invention to provide a device
for use by skiers which enables the skier to more readily absorb
the shocks incurred by bumps and dips in the supporting
surface.
It is a final object of the present invention to provide a device
for use by a skier which aids in flexing of the knees while
simultaneously reducing the strain incurred thereby.
To achieve the above and other objects, in accordance with the
present invention, an upper support means which is positionable
about the skier's leg above the knee is provided, including means
for securing it thereto. A lower support means positionable about
the skier's leg below the knee is also provided and includes means
for securing it thereto. In a preferred form, the upper support
means comprises a substantially rigid concave plate positionable
about the rearward portion of the skier's leg above the knee. The
upper plate may additionally include a projecting tongue portion
extending toward the skier's waist and engaging the rearmost
portion of the skier's upper leg when the device is in position,
thus providing for maximum leverage. The lower support means
comprises a substantially rigid concave plate positionable about
the rearward portion of the skier's leg below the knee and in one
form is a concave cuff positionable about the ankle portion of the
skier's leg exterior to the skier's boot. Spring means interconnect
the upper and lower support means, and coupling means, preferably
located on both sides of both the upper and lower support means,
securely maintain the spring means therein so as to interconnect
the upper and lower support means in an intersprung fashion.
In the preferred form, the spring means comprise a pair of beam
spring members which pass through orifices located in the coupling
means on either side of both upper and lower support plates. In
this manner, part of the upper torso weight is transferred directly
to the lower leg so as to remove it from the knees. In addition,
the elasticity and deflection characteristics of the beam spring
members enable the skier to gently bob up and down while skiing so
as to provide for easy weighting and unweighting of the skis for
turning and balance. Furthermore, the beam spring members also help
absorb the shocks of bumps and dips in the snow or like surface so
as to enable the skier to more readily maintain and control his
balance and weight distribution.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a front perspective view illustrating one embodiment of a
pair of devices constructed according to the present invention.
FIG. 2 is a side elevational view of the embodiment of FIG. 1
secured to the legs of a skier and in an essentially unstressed
condition.
FIG. 3 is a similar side elevational view of the embodiment of FIG.
2, the device being in a stressed condition with the skier
crouched.
FIG. 4 is a front perspective view illustrating a second embodiment
of a pair of devices constructed according to the present
invention.
FIG. 5 is a side elevational view of the embodiment of FIG. 4
secured to the legs of a skier and in an essentially unstressed
condition.
FIG. 6 is a cross-sectional view taken substantially along line
6--6 of FIG. 4 and illustrating one embodiment of the coupling
means for the upper support means.
DETAILED DESCRIPTION OF THE INVENTION
With reference to the embodiment represented in FIGS. 1 through 3,
a pair of flexible leg supports 10 is shown. Each leg support 10
includes an upper support means 12 positionable about the skier's
leg above the knee, and a lower support means 13 positionable about
the skier's leg below the knee. In the illustrated form, upper
support means 12 is a substantially rigid, concave plate 14 sized
and shaped to fit snugly against the rear portion of the skier's
leg above the knee, the center section of plate 14 being removed so
as to reduce the pressure against the skier's leg when plate 14 is
in position. In like manner, lower support means 13 is a
substantially rigid, concave plate 15 sized and shaped to snugly
fit against the rear portion of a skier's leg below the knee, with
the center section thereof being removed to reduce the pressure
against the skier's calf when in position. Plates 14 and 15 may be
constructed from any substantially rigid material, although
stainless steel or injection molded plastic are preferred.
Upper and lower support means 12, 13 may be secured to the legs of
a skier in any manner. In one form, orifices 16 are provided on
each longitudinal edge of plate 14 through which lace 18 may pass.
Likewise, orifices 20 are provided along each longitudinal edge of
plate 15 through which lace 22 may pass. In this manner, plates 14,
15 are positioned against the rearward portion of the skier's leg
above and below the knee, and laces 18, 22 are then passed,
respectively, through orifices 16, 20 and over the forward portions
of the skier's leg so as to secure plates 14, 15 in place.
Coupling means 24 are disposed on both sides of upper support means
12, and coupling means 25 are likewise provided on both sides of
lower support means 13. In the illustrated form, coupling means 24,
25 are U-shaped brackets having projecting ear portions 26 and 27,
respectively. Brackets 24, 25 are mounted longitudinally on each
side of plates 14 and 15, each bracket preferably having an orifice
in each projecting ear portion 26, 27. Conveniently, brackets 24,
25 may be constructed from 4130 steel, although any material of
sufficient strength may be utilized depending upon the material
selected for plates 14, 15.
A second embodiment of a pair of leg supports 10 embodying the
invention is shown at FIGS. 4-6. Similar to the previous
embodiment, each leg support 10' includes an upper support means
12' positionable about the skier's leg above the knee, a lower
support means 13' positionable about the skier's leg below the
knee, coupling means 24' disposed on both sides of upper support
means 12', and coupling means 25' disposed on both sides of lower
support means 13'. In this particular embodiment, upper support
means 12' is also a substantially rigid, concave plate 14' sized
and shaped to fit snugly against the rear portion of the skier's
leg above the knee, the center section of plate 14' being removed.
However, plate 14' may additionally include a projecting tongue
portion 28 which extends toward the skier's waist and engages the
rearmost portion of the skier's upper leg to provide even greater
support and maximum leverage for the skier, the extension
preferably being about five to 6 inches in length. The lower
support means 13' is a substantially rigid, concave plate in the
form of a cuff 33 adapted to fit about the rearward ankle portion
of the skier's leg exterior to the skier's boot. This particular
embodiment is especially preferred when the boots have rigid or
plastic shells and are of the "high top" type (i.e. extend above
the ankle), since the plastic boot shell will absorb the downward
spring means load.
The upper support plate 14' of this second embodiment may be
secured to the leg of a skier in the same manner as illustrated in
FIGS. 1 - 3. However, it may also be secured to the leg of a skier,
as illustrated in FIGS. 4 and 5, by two straps 29 and 30 attached
to each edge of plate 14' with buckle means 31 and 32 of
conventional design interposed intermediate the lengths of straps
29 and 30. The lower support cuff 33 is preferably secured to the
skier's ankle by providing a similar strap 34 attached to each edge
of cuff 33 and a buckle means 35 of conventional design interposed
intermediate the length of strap 34. This arrangement is preferred
due to the short length of the edges of cuff 33.
The coupling means 24' on either side of upper support plate 14'
may be as previously described or as illustrated in FIGS. 4 - 6. In
this second embodiment, coupling means 24' include two concave
members 36 securely mounted about the upper and lower portions of
plate 14' approximately six inches apart. Members 36 may be
intermolded into plate 14' or secured about the exterior of plate
14' as illustrated herein. Each member 36 preferably includes a
U-shaped wire 38 surrounded by a tubular molding portion 40. Each
wire 38 terminates at both ends in a rounded portion 42 to form an
orifice or channel at each end through which the spring means
passes, as described below. Conveniently, wire 38 can be 10
gage-0.101 wire or sixteen gage x 1 inch strap stock, although any
known conventional material may be used.
Due to the short height of cuff 33 as compared to plate 15, the
coupling means 25' of the second embodiment preferably includes
tubular members 44 securely mounted to each side of cuff 33 and
through which the spring means pass. In preferred form, swage-type
fittings 46 are secured about the spring means at both ends of each
tubular member 44 to prevent the spring means from slipping through
members 44 when a load is imposed thereon.
Referring to FIGS. 1 - 6, the spring means which interconnect the
upper and lower leg support means 12, 13 and 12', 13' of each
device 10 and 10', respectively, are preferably a pair of beam
spring members 48, 50 which are mounted within coupling means 24,
25 and 24', 25'. When devices 10 and 10' are initially positioned
on the legs of a skier, members 48, 50 are in an initial position
of no stress. Members 48, 50 are constructed from a spring quality
metal having deflection characteristics and an elasticity such that
deflection of members 48, 50 caused by bending of the knees
produces stress therein which tends to relatively straighten
members 48, 50 and return them to their initial position of no
stress. In preferred form, beam spring members 48, 50 are a pair of
rods or bars which pass through the orifices present in coupling
means 24, 25 and 24', 25' so as to securely link plates 12, 13 and
12', 13', respectively, together in such a manner that bars 48, 50
are arranged on both sides of a skier's leg and maintained
generally parallel with the axis of the skier's leg when device 10
and device 10' are in position. Conveniently, torsion bars may be
used for bars 48, 50, although bars 48, 50 are generally not
subjected to torsional stress. Ring portions 52, 54 are provided at
the upper ends of bars 48, 50 to enable ready removal of the bars
from plates 12, 13 and 12', 13' in order to put on and take off the
device as well as replace bars 48, 50 with different strength bars.
In addition, it is preferred that bars 48, 50 be permanently
slightly bent intermediate their lengths between plates 12, 13 and
between plates 12', 13' at points 56, 58. In this manner, as
indicated in FIGS. 2 and 5, the knees tend to be kept in a flexed
or bent position when the devices 10 and 10' are secured to the
skier's legs in an unstressed condition. This feature helps the
skier avoid inadvertent complete straightening of his legs and
consequent loss of control over his skis.
The loading strength of the spring bars 48, 50 utilized in the
present invention may vary considerably. The particular strength
selected will depend upon the weight and height of the skier as
well as the skier's experience, ability and individual preference.
It is believed, however, that a loading strength of between about
ten and thirty pounds is adequate for most weight and height
ranges. For example, the inventor of the subject invention is 5
feet 10 inches, weighs 155 pounds and finds that torsion bars
having a 24 pound loading strength provide good flexibility and
support when skiing.
When the present invention is secured to the legs of a skier, it is
preferred that a one-half inch foam rubber liner be placed between
the inside surface of plates 12, 13, 12' and 13' and the skier's
legs in order to avoid any rubbing or chafing which possibly might
occur if the plates were to be placed directly against the legs
themselves.
In skiing, the downhill skier normally keeps his legs bent at the
knees with his weight pressing his legs against the forward top
portion of the ski boots. When passing over bumps or moguls, the
skier normally flexes his legs considerably. Furthermore, the skier
must weight and unweight his skis by bending and straightening at
the knees in order to make efficient parallel turns. All of this
action causes the skier's knees to tire and perhaps even weaken.
The device of the present invention, however, tends to keep the
skier's legs bent at the knees in a proper skiing fashion, and
during flexing of the knees and crouching of the skier, weight is
transferred directly from the upper support plate to the lower
support plate by way of a load imposed on the beam spring members
so that the upper body weight carried and supported at the knees is
reduced. This weight distribution enables the skier to rest his
legs and knees since a portion of the skier's weight is supported
by the beam spring members. In addition, the flexing of the beam
spring members as the skier moves up and down while skiing aids the
skier considerably in this movement, thereby reducing the amount of
strain and fatigue to the legs. Finally, when skiing over a series
of small bumps and dips, the beam spring members of the present
device act as shock absorbers, thereby enabling the skier to more
readily maintain his balance, weight distribution and control over
the skis by allowing the skier to bob up and down gently.
It will be understood that the invention may be embodied in other
specific forms without departing from the spirit or central
characteristics thereof. The present examples and embodiments,
therefore, are to be considered in all respects as illustrative and
not restrictive, and the invention is not to be limited to the
details given herein but may be modified within the scope of the
appended claims.
* * * * *