CA2056148A1 - Walking frame for an infirm patient with adjustable leg length - Google Patents
Walking frame for an infirm patient with adjustable leg lengthInfo
- Publication number
- CA2056148A1 CA2056148A1 CA 2056148 CA2056148A CA2056148A1 CA 2056148 A1 CA2056148 A1 CA 2056148A1 CA 2056148 CA2056148 CA 2056148 CA 2056148 A CA2056148 A CA 2056148A CA 2056148 A1 CA2056148 A1 CA 2056148A1
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- Canada
- Prior art keywords
- leg
- legs
- rear frame
- frame element
- cross bar
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
ABSTRACT OF THE DISCLOSURE
WALKING FRAME FOR AN INFIRM PATIENT WITH ADJUSTABLE LEG LENGTH
A walker frame of the A-frame type includes a front frame element including two depending legs and a rear frame element also including two depending legs which are pivoted about a transverse axis at the top of the frames and are held at a required spacing by straps at the bottom. The rear frame includes an integral cross bar at the top of the legs which forms as backrest for a seat placed on a pair of cross bars at an intermediate height of the front and rear frames respectively. The leg length of each leg is adjustable by a sliding extension portion which passes along the inside of the main leg portion to a position beyond the fastening point of the cross bar and the fastening of the cross bar is arranged without penetration of the outer tube to allow the sliding action to occur. The fastening of extension portions to the main portion occurs by threaded fasteners mounted inside the tube and extending from the inside surface of the inner tube through to the outside surface of the outer tube which is attached a fastening plate.
WALKING FRAME FOR AN INFIRM PATIENT WITH ADJUSTABLE LEG LENGTH
A walker frame of the A-frame type includes a front frame element including two depending legs and a rear frame element also including two depending legs which are pivoted about a transverse axis at the top of the frames and are held at a required spacing by straps at the bottom. The rear frame includes an integral cross bar at the top of the legs which forms as backrest for a seat placed on a pair of cross bars at an intermediate height of the front and rear frames respectively. The leg length of each leg is adjustable by a sliding extension portion which passes along the inside of the main leg portion to a position beyond the fastening point of the cross bar and the fastening of the cross bar is arranged without penetration of the outer tube to allow the sliding action to occur. The fastening of extension portions to the main portion occurs by threaded fasteners mounted inside the tube and extending from the inside surface of the inner tube through to the outside surface of the outer tube which is attached a fastening plate.
Description
20~6~ 48 WALKING FRAME FOR AN INFIRM PATIENT WITH ADJUSTABLE LEG LENGTH
BACKGROUND OF THE INVENTION
This invention relates to a walking frame of the type for use by an infirm patient.
One type of walking frame is shown in U.S. patent 4,643,211 of Morris et al which comprises a front frame structure and a rear frame structure each formed from two depending legs with the rear frame structure being pivotally mounted to the front frame structure about a horizontal axis adjacent the top of the frame so as to be movable from a collapsed condition to an A-frame condition. The front legs have ground wheels. The front frame carries rearwardly projecting handles. A seat is provided on two cross bars each extending between the legs of a respective one of the front and rear frames~
This device has achieved some success and devices of this general type have been sold in North America.
However the device has a number of disadvantages.
Firstly the length of the legs cannot be adjusted so that it necessary to have available for sale different sizes of the walking frame to suit different size patients.
Secondly the stuctural rigidity of the device i9 limited and it is necessary to include a bottom cro~ bar at the front legs to improve the structural rigidity.
- , -SUMMARY OF THE INVENTION
It i9 one object of the present invention, therefore to provide an improved walking frame of thig general type.
According to the first aspect of the invention there is provided a walking frame for assisting the walking of an infirm patient comprising a front frame element having two parallel generally upstanding legs extending from a bottom end of each leg closely adjacent to the ground to an upper end of each leg, a cross bar, means fastening the cross bar to each of the legs at a position intermediate the bottom and upper end of the respective leg, a ground wheel mounted at the bottom end of -each :leg or supporting the bottom end relative to the ground to allow movement of the front frame element across the ground;
a rear frame element having two parallel generally upstanding legs extending from a bottom end of each leg at the ground to an upper endi a cross bar, fastening means fastening the cross bar to each of the legs at a position lntermediate the bottom and upper ends of the leg and means at the bottom end of each leg for engaging the ground, means coupling the front and rear frame elements for pivotal movement about a substantially horizontal axis passing through each of the legs of the front and rear f:rame element to allow movement o the front and rear frame element from a closed, folded position in which the -:
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BACKGROUND OF THE INVENTION
This invention relates to a walking frame of the type for use by an infirm patient.
One type of walking frame is shown in U.S. patent 4,643,211 of Morris et al which comprises a front frame structure and a rear frame structure each formed from two depending legs with the rear frame structure being pivotally mounted to the front frame structure about a horizontal axis adjacent the top of the frame so as to be movable from a collapsed condition to an A-frame condition. The front legs have ground wheels. The front frame carries rearwardly projecting handles. A seat is provided on two cross bars each extending between the legs of a respective one of the front and rear frames~
This device has achieved some success and devices of this general type have been sold in North America.
However the device has a number of disadvantages.
Firstly the length of the legs cannot be adjusted so that it necessary to have available for sale different sizes of the walking frame to suit different size patients.
Secondly the stuctural rigidity of the device i9 limited and it is necessary to include a bottom cro~ bar at the front legs to improve the structural rigidity.
- , -SUMMARY OF THE INVENTION
It i9 one object of the present invention, therefore to provide an improved walking frame of thig general type.
According to the first aspect of the invention there is provided a walking frame for assisting the walking of an infirm patient comprising a front frame element having two parallel generally upstanding legs extending from a bottom end of each leg closely adjacent to the ground to an upper end of each leg, a cross bar, means fastening the cross bar to each of the legs at a position intermediate the bottom and upper end of the respective leg, a ground wheel mounted at the bottom end of -each :leg or supporting the bottom end relative to the ground to allow movement of the front frame element across the ground;
a rear frame element having two parallel generally upstanding legs extending from a bottom end of each leg at the ground to an upper endi a cross bar, fastening means fastening the cross bar to each of the legs at a position lntermediate the bottom and upper ends of the leg and means at the bottom end of each leg for engaging the ground, means coupling the front and rear frame elements for pivotal movement about a substantially horizontal axis passing through each of the legs of the front and rear f:rame element to allow movement o the front and rear frame element from a closed, folded position in which the -:
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2 ~ 3 ~14 8 bottom end3 of the legs of the front and rear elements lie adjacent to an open, operative po~ition of the front and rear frame elements in which the bottom ends of the legs lie at the corners of a rectangle, handle means at the upper end of the legs of the front fr.ame element for grasping by the patient while standing between the legs of the rear frame element, each of the legs of the front and rear frame elements comprising a main leg portion extending from the upper end of the respective leg to a lower end of the main leg portion a~ an intermediate height of the respective leg and an adjustment portisn slidably mounted within a hollow interior of the main leg portion and extending from the lower end of the main leg portion to the bottom end of the respective leg and movable therein in a generally vertical direction to adjust the length of ~the respective leg, locating means for locating the adjustment portion at a required adjustment position relative to the main leg portion, said fastening means of each leg being arranged to allow sliding movement of an upper end of the adjustment portion of the respective leg inside the main leg portion to a height upwardly of the fastening means. :
According to a second aspect of the invention .
th~ere is provided a walking frame for as3isting the walking o~
an infirm patient comprising a front frame element having two parallel generally up~tanding legs extending from a bottom end .
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of each leg closely adjacen~ to the ground to an upper end of each leg, a cros~ bar, mean~ fastening the cros~ bar ko each of the leg~ at a position intermediate the bottom and upper end of the respective leg, a ground whe01 mounted at the bot~om end of each leg for supporting the bottom end relative to the ground to allow movement of the front frame element across the ground;
a rear frame element having two parallel generally upstanding legs extending from a bottom end of each leg at the ground to an upper end, a cross bar, fastening means fastening the cross bar to each of the legs at a position intermediate the bottom and upper ends of the leg and meanY at the bottom end of each leg for engaging the ground, means coupling the front and rear frame elements for pivotal movement about a substantially horizontal axis pa~ing through each of the legs of~the front and rear frame element to allow movement of the front and rear frame element from a closed, folded position; in which the bottom ends of the legs of the front and rear elements lie adjacent to an open, operative position of the front and rear frame elements in which the bottom ends of the legs lie at the corners of a rectangle, handle means at the upper end of the legs of the front frame element for gra ping by the patient while standing between the leg~ of the rear frame element, wherein the rear frame element includes a second cross bar integral ~lth the legs of the rear frame element and formed by '.: - ' -,'' . . , :
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bending such that the second cross bar on the legs form a substantially U-shaped member with the legs projecting downwardly.
According ~o a third aspect of the invention there is provided a walking frame for assisting the walking of an infirm patient comprising a front frame element having two parallel generally upstanding legs extending from a bottom end of each leg closely adjacent to the ground to an upper end of each leg, a cross bar, means fastening the cross bar to each of the leg5 at a position intermediate the bottom and upper end of the respective leg, a ground wheel mounted at the bottom end of each leg for supporting the bottom end relative to the ground to allow movement of the front frame element acros~ the ground;
a rear frame element having two parallel generally upstanding legs extending from a bottom end of each leg at the ground to an upper end, a croYs bar, fastening means fastening the cross bar to each of the legs at a position intermediate the bottom and upper ends of the leg and means at the bottom end of each leg for engaging the ground, means coupling the front and rear frame elements for pivotal movement about a substantially horizontal axis passing through each of the legs of the front and rear frame element to allow movement of the front and rear frame element from a closed, folded po~ition in which the bottom ends of the legs of the front and rear elements lie ' ` . ' ~ . ~
, 2 ~ 8 adjacent to an open, operative position of the front and rear frame elements in which the bottom ends of the legs lie at the corners of a rectangle, handle means at the upper end of the leg~ of the front frame element for grasping by the patient while standing between the legs of the rear frame element, each of the legs of the front and rear frame elements comprising a main leg portion extending from the upper end of the respective leg to a lower end of the main leg portion at an intermediate height of the respective leg and an adjustment portion slidably mounted: within a hollow interior of the main leg portion and extending from the lower end of the main leg portion to the bottom end of the respective leg and movable therein in a generally vertical direction to adjust the length of the respective leg, locating means for locating the adjustment portion at a required adjustment position relative to the main leg portion, said fastening means of each leg being arranged to allow sliding movement of an upper end of the adjustment portion of the respective leg inside the main leg portion to a height upwardly of the fastening means, wherein the main leg portion and the adjustment leg portion each comprise a tubular member with the adjustment leg portion slidable inside the tubular portion of the main leg portion, the locating means compr1sing a screw fastener having a head inside the adjustment portion and engaging the inside surface of the adjustment .
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portion and threaded portion extending through the wall of the adjustment portion, through the wall of the main portion and into engagement with a threaded fastener pressed against the outside surface of the main leg poxtion, and wherein there is provided an opening in the wall o~ the adjustment portion and the main leg portion aligned with the head to allow access through the openings for engagement with the head.
One or more embodiments of the invention will now be described in conjunction with the accompanying drawings~
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is an isometric view of a walking frame according to the present invention.
Figure 2 is a cross sectional view along the lines 2-2 of Figure 1.
Figure 3 is a cross sectional view along the lines 3-3 of Figure 2.
Figure 4 is across sectional view along the lines 4-4 of Figure 2.
In the drawings like characters of reference indicate corresponding part~ in the different figures.
The walking frame as shown in Figure 1 comprises a rear frame element 10 and a front frame element 11. The rear frame element 10 includes a pair of depending legs 12 and 13 2~6~48 together with an integral cross bar 14 which is formed by bending the tubular material from which the legs are formed to define the integral U-shape of the rear frame element. The rear frame element further includes a further cross bar 15 arranged at a mid height of the legs 13. The cro~s bar 15 is not integral with the legs but i~ instead attached to the legs and thus includes a horizontal section 16 derin~d in the cross bar itself together with a pair of turned down portions 17 at respective ends of the cross bar portion 16. The turned down ends 17 are attached to the legs by fastener elements 18 described in more detail hereinafter.
At the base of each of the legs 12 and 13 i9 provided a ground wheel element 20 including dual wheels 21 and 22 mounted upon an axle 23. In order to show the operation of the wheel, the wheels 21 and 22 themselveY have been removed from the leg 13 showing only the axle 23 which is mounted within a pair of opposed slots 24 in the bottom part of the leg and extending vertically up the leg over a predetermined dlstance. Within~the leg is provided a spring 25 which biases the axle 23 downwardly to the base of the slots 24 so that the : wheels 21 and: 22 are pressed in~o contact with the ground.
However downward force on the respective leg will cause the wheel to be raised by sliding action of the axle 23 along the slots agalnst the bias o~ the spring. At the lowermost end o~
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each of the legs i5 provided a rubber stopper 26 which can engage the ground as a frictional stop when the vertical force is applied to lift the ground wheel vertically upwardly.
The front frame element 11 comprises a pair of depending legs 28 and 29 together with a single cross bar 30 identical in form to the cross bar 15 so as to include a cross bar portion 31 and a pair of turned down end portions 32 again fastened to the legs 28 and 29 by fastening elements 18. At the top of the legs 28 and 29 i3 provided a rearwardly turned portion 33, 34 respectively each including a hand grip section 35 to act as a handle by which the frame can be grasped by the patient.
At the base of ~each of the legs 28 and 29 is provided a ground wheel 36 which comprises a pair of uheel elements 37 and 38 mounted upon a horizontal axis 39. Again for convenience of illustration, the wheel elements 37 and 38 are omitted from the leg 29 to show the axle 39 which is mounteù upon a swiuel sec~ion 40 allowing a castoring action of the axle 39 about a vertical axis longitudinal of the lower part of the leg.
The front and rear frame elements are connected by pivot plns lOA and lOB allowing movement from an extended operating position as shown to a folded, collapsed condition in which the front and rear legs lic closely adjacent.
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-;' `, 2 ~ 8 A seat panel 42 is formed of a grid material and is mounted on the cross bar 31 of the front frame element for pivotal movement about the longitudinal axis of the cros bar so that it can be raised and lowered. In the lowered position shown in Figure 1, the seat portion res~s upon the cross bar 16 so as to form a horizontal panel onto which the patient can sit with the back of ~he patient engaging against the cross bar 14 as a back rest. The feet of the patient thu~ face outwardly from the rear frame with the heels of the patient between the legs of the rear frame. The seat can also be pivoted upwardly to a stored position in which the upper part of the seat rests against the cross bar 14.
Each of the legs 12, 13, 28 and 29 includes a main leg portion and a lower extension portion. This construction is shown in more detail in Figures 2, 3 and 4 and for convenience only one of the legs is shown and will be described hereinafter. Thus as shown in those figures, the main leg portion comprise~ an outer tubular member 50 and the extension portion includes an inner tubular member 51 slidably received inside the outer tubular member. The lower part of the extension portion is slightly cranked at 53 (Figure 1) so that the lower part extends vertically downwardly while the upper part forms a direct linear extension of the main part 50.
Each of the tubular members is formed from an `
: , 2~gl~8 aluminum tube. The fastening of the extension portion at a required height within the main portion is shown best in Figures 2 and 4 and comprises a pair of threaded fasteners 54 and 55 each of which has a head on the inside surface of the inner tube and a threaded bolt extending through a hole in the inner tube through a hole in the outer tube and into a holding plate 56 mounted on the outside surface of the outer tube 50.
The plate 56 as is shown in Figure 4 is slightly curved so that it extends around the outer surface. The hole in the plate 56 is threaded so that the threaded fastener can engage into the female screw thread of the holding plate to clamp the t~o tubular members between the head and the plate of the screw fastener system.
Thus the tubular members 50 and 51 haue a plurality of aligned holes 57 two of which can be selected to receive the threaded fasteners 55 to set the position of the extension portion at a required height relative to the outer portion.
In order to access the head of the screw ~asteners, aligned holes 58 are provided diametrica~ly opposed to the holes 57 to allow a tool to extend through the hole 58 to rotate the threaded fasteners. The holes 58 are also provided at spaced po~itions along the length of the leg and arranged relative to the holes 57 ~o that they can be aligned .
'. ~ ' -' ' 2~5~ ~8 in both the inner and outer tubular portions.
A pair of retaining straps 60 and 61 are provided each extending from a respective one of the rear legs to a respective one of the front leg8. The retaining ~trap~ are pivotally coupled at a centre point 61 allowing the strap to be folded upwardly in the folding action of the frame. The ends of the straps 60 and 61 are attached to one of the screw fasteners which extends outwardly beyond the plate 56 with a nut 63 holding the strap in place as best shown in Figure 4.
The fastening of the downwturned portions of the cross bars to the respective leg i~ also shown in Figures 2 and 3. Thus one of the downturned portions is indicated at 3i and is fastened to the leg by the fastener 18. The fastener comprises a pair of plates 70 and 71 each of which has a length to extend partly along ths leg and partly along the downturned portion and each of which is curved in the transverse direction so as to follow around the curvature of the leg and the downturned portion in their side by side aligned position best shown in Figure 3. Thus the plates 70 and 71 closely clamp around the tubular members forming the main portion of the leg and the downwturn portion and are fastened thereto by suitable msans which may be a strong adhesive or may be by soldering if ; necessary. Howevsr the fastening system does not penetrate the main tubular member 50 and i~ wholly on the outer surface so , t 2 0 ~ 614 that the inner tubular member 51 forming the extansion portion can pass along the inside surface of the main tubular portion 50 to a position at or above the fastening 18.
The construction as shown above therefore has the advantages that it provides adjustable leg length allowing a single device to be adjusted to accomodate different height of patients. The adjustment takes place at the leg end rather than at the handle end so that the seat is also raised with the adjustment effect. In addition the adjustment of the legs provides increased stability as the height increases since the spacing of the wheels increases as the wheels are moved downwardly.
The use of the integral cross bar 14 provides a very stable structure without the necessity for cross bars lower ~on the frame structure which could interfere with the adjuqtment of the leg length~ In addition the avoidance of cross bars at the lower position prevents danger of contacting the ankles of the user or other persons around the user.
The coupling of the cross bars to the legs avoids the use of any pe~netration of the legs so that the adjustment of the leg length can occur quickly without effecting the fastening of the cross ~bars and while using a long enough portion of the extenqion portion which can penetrate into the main leg portion a sufficient extent for 9tability.
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The fastening of the extenqion portion to the main body portion is provided without any possibility of pinching the tubular members which could prevent further sliding action.
Since various modifications can be made in my invention as hereinabove described, and many apparently widely different embodiments of same made within the spirit and scope of the claims without departing from such spirit and scope, it i9 intended that all matter contained in the accompanying specification shall be interpreted as illustrative only and not in a limiting sense.
According to a second aspect of the invention .
th~ere is provided a walking frame for as3isting the walking o~
an infirm patient comprising a front frame element having two parallel generally up~tanding legs extending from a bottom end .
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of each leg closely adjacen~ to the ground to an upper end of each leg, a cros~ bar, mean~ fastening the cros~ bar ko each of the leg~ at a position intermediate the bottom and upper end of the respective leg, a ground whe01 mounted at the bot~om end of each leg for supporting the bottom end relative to the ground to allow movement of the front frame element across the ground;
a rear frame element having two parallel generally upstanding legs extending from a bottom end of each leg at the ground to an upper end, a cross bar, fastening means fastening the cross bar to each of the legs at a position intermediate the bottom and upper ends of the leg and meanY at the bottom end of each leg for engaging the ground, means coupling the front and rear frame elements for pivotal movement about a substantially horizontal axis pa~ing through each of the legs of~the front and rear frame element to allow movement of the front and rear frame element from a closed, folded position; in which the bottom ends of the legs of the front and rear elements lie adjacent to an open, operative position of the front and rear frame elements in which the bottom ends of the legs lie at the corners of a rectangle, handle means at the upper end of the legs of the front frame element for gra ping by the patient while standing between the leg~ of the rear frame element, wherein the rear frame element includes a second cross bar integral ~lth the legs of the rear frame element and formed by '.: - ' -,'' . . , :
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bending such that the second cross bar on the legs form a substantially U-shaped member with the legs projecting downwardly.
According ~o a third aspect of the invention there is provided a walking frame for assisting the walking of an infirm patient comprising a front frame element having two parallel generally upstanding legs extending from a bottom end of each leg closely adjacent to the ground to an upper end of each leg, a cross bar, means fastening the cross bar to each of the leg5 at a position intermediate the bottom and upper end of the respective leg, a ground wheel mounted at the bottom end of each leg for supporting the bottom end relative to the ground to allow movement of the front frame element acros~ the ground;
a rear frame element having two parallel generally upstanding legs extending from a bottom end of each leg at the ground to an upper end, a croYs bar, fastening means fastening the cross bar to each of the legs at a position intermediate the bottom and upper ends of the leg and means at the bottom end of each leg for engaging the ground, means coupling the front and rear frame elements for pivotal movement about a substantially horizontal axis passing through each of the legs of the front and rear frame element to allow movement of the front and rear frame element from a closed, folded po~ition in which the bottom ends of the legs of the front and rear elements lie ' ` . ' ~ . ~
, 2 ~ 8 adjacent to an open, operative position of the front and rear frame elements in which the bottom ends of the legs lie at the corners of a rectangle, handle means at the upper end of the leg~ of the front frame element for grasping by the patient while standing between the legs of the rear frame element, each of the legs of the front and rear frame elements comprising a main leg portion extending from the upper end of the respective leg to a lower end of the main leg portion at an intermediate height of the respective leg and an adjustment portion slidably mounted: within a hollow interior of the main leg portion and extending from the lower end of the main leg portion to the bottom end of the respective leg and movable therein in a generally vertical direction to adjust the length of the respective leg, locating means for locating the adjustment portion at a required adjustment position relative to the main leg portion, said fastening means of each leg being arranged to allow sliding movement of an upper end of the adjustment portion of the respective leg inside the main leg portion to a height upwardly of the fastening means, wherein the main leg portion and the adjustment leg portion each comprise a tubular member with the adjustment leg portion slidable inside the tubular portion of the main leg portion, the locating means compr1sing a screw fastener having a head inside the adjustment portion and engaging the inside surface of the adjustment .
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portion and threaded portion extending through the wall of the adjustment portion, through the wall of the main portion and into engagement with a threaded fastener pressed against the outside surface of the main leg poxtion, and wherein there is provided an opening in the wall o~ the adjustment portion and the main leg portion aligned with the head to allow access through the openings for engagement with the head.
One or more embodiments of the invention will now be described in conjunction with the accompanying drawings~
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is an isometric view of a walking frame according to the present invention.
Figure 2 is a cross sectional view along the lines 2-2 of Figure 1.
Figure 3 is a cross sectional view along the lines 3-3 of Figure 2.
Figure 4 is across sectional view along the lines 4-4 of Figure 2.
In the drawings like characters of reference indicate corresponding part~ in the different figures.
The walking frame as shown in Figure 1 comprises a rear frame element 10 and a front frame element 11. The rear frame element 10 includes a pair of depending legs 12 and 13 2~6~48 together with an integral cross bar 14 which is formed by bending the tubular material from which the legs are formed to define the integral U-shape of the rear frame element. The rear frame element further includes a further cross bar 15 arranged at a mid height of the legs 13. The cro~s bar 15 is not integral with the legs but i~ instead attached to the legs and thus includes a horizontal section 16 derin~d in the cross bar itself together with a pair of turned down portions 17 at respective ends of the cross bar portion 16. The turned down ends 17 are attached to the legs by fastener elements 18 described in more detail hereinafter.
At the base of each of the legs 12 and 13 i9 provided a ground wheel element 20 including dual wheels 21 and 22 mounted upon an axle 23. In order to show the operation of the wheel, the wheels 21 and 22 themselveY have been removed from the leg 13 showing only the axle 23 which is mounted within a pair of opposed slots 24 in the bottom part of the leg and extending vertically up the leg over a predetermined dlstance. Within~the leg is provided a spring 25 which biases the axle 23 downwardly to the base of the slots 24 so that the : wheels 21 and: 22 are pressed in~o contact with the ground.
However downward force on the respective leg will cause the wheel to be raised by sliding action of the axle 23 along the slots agalnst the bias o~ the spring. At the lowermost end o~
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each of the legs i5 provided a rubber stopper 26 which can engage the ground as a frictional stop when the vertical force is applied to lift the ground wheel vertically upwardly.
The front frame element 11 comprises a pair of depending legs 28 and 29 together with a single cross bar 30 identical in form to the cross bar 15 so as to include a cross bar portion 31 and a pair of turned down end portions 32 again fastened to the legs 28 and 29 by fastening elements 18. At the top of the legs 28 and 29 i3 provided a rearwardly turned portion 33, 34 respectively each including a hand grip section 35 to act as a handle by which the frame can be grasped by the patient.
At the base of ~each of the legs 28 and 29 is provided a ground wheel 36 which comprises a pair of uheel elements 37 and 38 mounted upon a horizontal axis 39. Again for convenience of illustration, the wheel elements 37 and 38 are omitted from the leg 29 to show the axle 39 which is mounteù upon a swiuel sec~ion 40 allowing a castoring action of the axle 39 about a vertical axis longitudinal of the lower part of the leg.
The front and rear frame elements are connected by pivot plns lOA and lOB allowing movement from an extended operating position as shown to a folded, collapsed condition in which the front and rear legs lic closely adjacent.
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-;' `, 2 ~ 8 A seat panel 42 is formed of a grid material and is mounted on the cross bar 31 of the front frame element for pivotal movement about the longitudinal axis of the cros bar so that it can be raised and lowered. In the lowered position shown in Figure 1, the seat portion res~s upon the cross bar 16 so as to form a horizontal panel onto which the patient can sit with the back of ~he patient engaging against the cross bar 14 as a back rest. The feet of the patient thu~ face outwardly from the rear frame with the heels of the patient between the legs of the rear frame. The seat can also be pivoted upwardly to a stored position in which the upper part of the seat rests against the cross bar 14.
Each of the legs 12, 13, 28 and 29 includes a main leg portion and a lower extension portion. This construction is shown in more detail in Figures 2, 3 and 4 and for convenience only one of the legs is shown and will be described hereinafter. Thus as shown in those figures, the main leg portion comprise~ an outer tubular member 50 and the extension portion includes an inner tubular member 51 slidably received inside the outer tubular member. The lower part of the extension portion is slightly cranked at 53 (Figure 1) so that the lower part extends vertically downwardly while the upper part forms a direct linear extension of the main part 50.
Each of the tubular members is formed from an `
: , 2~gl~8 aluminum tube. The fastening of the extension portion at a required height within the main portion is shown best in Figures 2 and 4 and comprises a pair of threaded fasteners 54 and 55 each of which has a head on the inside surface of the inner tube and a threaded bolt extending through a hole in the inner tube through a hole in the outer tube and into a holding plate 56 mounted on the outside surface of the outer tube 50.
The plate 56 as is shown in Figure 4 is slightly curved so that it extends around the outer surface. The hole in the plate 56 is threaded so that the threaded fastener can engage into the female screw thread of the holding plate to clamp the t~o tubular members between the head and the plate of the screw fastener system.
Thus the tubular members 50 and 51 haue a plurality of aligned holes 57 two of which can be selected to receive the threaded fasteners 55 to set the position of the extension portion at a required height relative to the outer portion.
In order to access the head of the screw ~asteners, aligned holes 58 are provided diametrica~ly opposed to the holes 57 to allow a tool to extend through the hole 58 to rotate the threaded fasteners. The holes 58 are also provided at spaced po~itions along the length of the leg and arranged relative to the holes 57 ~o that they can be aligned .
'. ~ ' -' ' 2~5~ ~8 in both the inner and outer tubular portions.
A pair of retaining straps 60 and 61 are provided each extending from a respective one of the rear legs to a respective one of the front leg8. The retaining ~trap~ are pivotally coupled at a centre point 61 allowing the strap to be folded upwardly in the folding action of the frame. The ends of the straps 60 and 61 are attached to one of the screw fasteners which extends outwardly beyond the plate 56 with a nut 63 holding the strap in place as best shown in Figure 4.
The fastening of the downwturned portions of the cross bars to the respective leg i~ also shown in Figures 2 and 3. Thus one of the downturned portions is indicated at 3i and is fastened to the leg by the fastener 18. The fastener comprises a pair of plates 70 and 71 each of which has a length to extend partly along ths leg and partly along the downturned portion and each of which is curved in the transverse direction so as to follow around the curvature of the leg and the downturned portion in their side by side aligned position best shown in Figure 3. Thus the plates 70 and 71 closely clamp around the tubular members forming the main portion of the leg and the downwturn portion and are fastened thereto by suitable msans which may be a strong adhesive or may be by soldering if ; necessary. Howevsr the fastening system does not penetrate the main tubular member 50 and i~ wholly on the outer surface so , t 2 0 ~ 614 that the inner tubular member 51 forming the extansion portion can pass along the inside surface of the main tubular portion 50 to a position at or above the fastening 18.
The construction as shown above therefore has the advantages that it provides adjustable leg length allowing a single device to be adjusted to accomodate different height of patients. The adjustment takes place at the leg end rather than at the handle end so that the seat is also raised with the adjustment effect. In addition the adjustment of the legs provides increased stability as the height increases since the spacing of the wheels increases as the wheels are moved downwardly.
The use of the integral cross bar 14 provides a very stable structure without the necessity for cross bars lower ~on the frame structure which could interfere with the adjuqtment of the leg length~ In addition the avoidance of cross bars at the lower position prevents danger of contacting the ankles of the user or other persons around the user.
The coupling of the cross bars to the legs avoids the use of any pe~netration of the legs so that the adjustment of the leg length can occur quickly without effecting the fastening of the cross ~bars and while using a long enough portion of the extenqion portion which can penetrate into the main leg portion a sufficient extent for 9tability.
' ~ ` ''', ' ' ' ' ' .
.
2 ~
The fastening of the extenqion portion to the main body portion is provided without any possibility of pinching the tubular members which could prevent further sliding action.
Since various modifications can be made in my invention as hereinabove described, and many apparently widely different embodiments of same made within the spirit and scope of the claims without departing from such spirit and scope, it i9 intended that all matter contained in the accompanying specification shall be interpreted as illustrative only and not in a limiting sense.
Claims
(1) A walking frame for assisting the walking of an infirm patient comprising a front frame element having two parallel generally upstanding legs extending from a bottom end of each leg closely adjacent to the ground to an upper end of each leg, a cross bar, means fastening the cross bar to each of the legs at a position intermediate the bottom and upper end of the respective leg, a ground wheel mounted at the bottom end of each leg for supporting the bottom end relative to the ground to allow movement of the front frame element across the ground;
a rear frame element having two parallel generally upstanding legs extending from a bottom end of each leg at the ground to an upper end, a cross bar, fastening means fastening the cross bar to each of the legs at a position intermediate the bottom and upper ends of the leg and means at the bottom end of each leg for engaging the ground, means coupling the front and rear frame elements for pivotal movement about a substantially horizontal axis passing through each of the legs of the front and rear frame element to allow movement of the front and rear frame element from a closed, folded position in which the bottom ends of the legs of the front and rear elements lie adjacent to an open, operative position of the front and rear frame elements in which the bottom ends of the legs lie at the corners of a rectangle, handle means at the upper end of the legs of the front frame element for grasping by the patient while standing between the legs of the rear frame element, each of the legs of the front and rear frame elements comprising a main leg portion extending from the upper end of the respective leg to a lower end of the main leg portion at an intermediate height of the respective leg and an adjustment portion slidably mounted within a hollow interior of the main leg portion and extending from the lower end of the main leg portion to the bottom end of the respective leg and movable therein in a generally vertical direction to adjust the length of the respective leg, locating means for locating the adjustment portion at a required adjustment position relative to the main leg portion, said fastening means of each leg being arranged to allow sliding movement of an upper end of the adjustment portion of the respective leg inside the main leg portion to a height upwardly of the fastening means.
(2) The walking frame according to Claim 1 wherein each of the cross bars includes a horizontal bar portion and a pair of downwardly turned portions each at a respective end of the horizontal bar portion such that each downwardly depending bar portion lies alongside and parallel to a respective leg and wherein the fastening means is arranged externally of the leg and is arranged to clamp the downturned portion to the leg.
(3) The walking frame according to Claim 2 wherein the fastening means comprises clamping plate means for engaging around the downwardly turned portion and the leg.
(4) The walking frame according to Claim 3 wherein the fastening means comprises a pair of plates each shaped to wrap around one half of the leg and one half of the downwardly turned portion.
(5) The walking frame according to Claim 4 wherein the clamping plates are attached to the downwardly turned portion and the leg by adhesive.
(6) The walking frame according to Claim 1 wherein the rear frame element includes a second cross bar integral with the legs of the rear frame element and formed by bending such that the second cross bar and the legs form a substantially U-shaped member with the legs projecting downwardly.
(7) The walking frame according to Claim 6 including a folding seat member resting upon the cross bars of the front and rear frame elements with the second cross bar of the rear frame element acting as a backrest at a height above the seat.
(8) The walking frame according to Claim 1 including a pair of strap members each extending from a respective one of the legs of the rear frame element to a respective one of the legs of the front frame element so as to hold the front and rear frame elements in the open operative position wherein the locating means also acts to attach the strap means to the respective leg.
(9) The walking frame according to Claim 8 wherein the main leg portion and the adjustment leg portion each comprise a tubular member with the adjustment leg portion slidable inside the tubular portion of the main leg portion, the locating means comprising a screw fastener having a head inside the adjustment portion and engaging the inside surface of the adjustment portion and threaded portion extending through the wall of the adjustment portion, through the wall of the main portion and into engagement with a threaded fastener pressed against the outside surface of the main leg portion, and wherein there is provided an opening in the wall of the adjustment portion and the main leg portion aligned with the head to allow access through the opening for engagement with the head.
(10) The walking frame according to Claim 9 wherein the outer screw threaded portion has an inside face which is curved to follow around the outside curve periphery of the main leg portion.
(11) A walking frame for assisting the walking of an infirm patient comprising a front frame element having two parallel generally upstanding legs extending from a bottom end of each leg closely adjacent to the ground to an upper end of each leg, a cross bar, means fastening the cross bar to each of the legs at a position intermediate the bottom and upper end of the respective leg, a ground wheel mounted at the bottom end of each leg for supporting the bottom end relative to the ground to allow movement of the front frame element across the ground; a rear frame element having two parallel generally upstanding legs extending from a bottom end of each leg at the ground to an upper end, a cross bar, fastening means fastening the cross bar to each of the legs at a position intermediate the bottom and upper ends of the leg and means at the bottom end of each leg for engaging the ground, means coupling the front and rear frame elements for pivotal movement about a substantially horizontal axis passing through each of the legs of the front and rear frame element to allow movement of the front and rear frame element from a closed, folded position in which the bottom ends of the legs of the front and rear elements lie adjacent to an open, operative position of the front and rear frame elements in which the bottom ends of the legs lie at the corners of a rectangle, handle means at the upper end of the legs of the front frame element for grasping by the patient while standing between the legs of the rear frame element, wherein the rear frame element includes a second cross bar integral with the legs of the rear frame element and formed by bending such that the second cross bar on the legs form a substantially U-shaped member with the legs projecting downwardly.
(12) The walking frame according to Claim 11 including a folding seat member resting upon the cross bars of the front and rear frame elements with the second cross bar of the rear frame element acting as a backrest at a height above the seat member.
(13) A walking frame for assisting the walking of an infirm patient comprising a front frame element having two parallel generally upstanding legs extending from a bottom end of each leg closely adjacent to the ground to an upper end of each leg, a cross bar, means fastening the cross bar to each of the legs at a position intermediate the bottom and upper end of the respective leg, a ground wheel mounted at the bottom end of each leg for supporting the bottom end relative to the ground to allow movement of the front frame element across the ground; a rear frame element having two parallel generally upstanding legs extending from a bottom end of each leg at the ground to an upper end, a cross bar, fastening means fastening the cross bar to each of the legs at a position intermediate the bottom and upper ends of the leg and means at the bottom end of each leg for engaging the ground, means coupling the front and rear frame elements for pivotal movement about a substantially horizontal axis passing through each of the legs of the front and rear frame element to allow movement of the front and rear frame element from a closed, folded position in which the bottom ends of the legs of the front and rear elements lie adjacent to an open, operative position of the front and rear frame elements in which the bottom ends of the legs lie at the corners of a rectangle, handle means at the upper end of the legs of the front frame element for grasping by the patient while standing between the legs of the rear frame element, each of the legs of the front and rear frame elements comprising a main leg portion extending from the upper end of the respective leg to a lower end of the main leg portion at an intermediate height of the respective leg and an adjustment portion slidably mounted within a hollow interior of the main leg portion and extending from the lower end of the main leg portion to the bottom end of the respective leg an movable therein in a generally vertical direction to adjust the length of the respective leg, locating means for locating the adjustment portion at a required adjustment position relative to the main leg portion, said fastening means of each leg being arranged to allow sliding movement of an upper end of the adjustment portion of the respective leg inside the main leg portion to a height upwardly of the fastening means, wherein the main leg portion and the adjustment leg portion each comprises a tubular member with the adjustment leg portion slidable inside the tubular portion of the main leg portion, the locating means comprising a screw fastener having a head inside the adjustment portion and engaging the inside surface of the adjustment portion and threaded portion extending through the wall of the adjustment portion, through the wall of the main portion and into engagement with a threaded fastener pressed against the outside surface of the main leg portion, and wherein there is provided an opening in the wall of the adjustment portion and the main leg portion aligned with the head to allow access through the openings for engagement with the head.
(14) The walking frame according to Claim 13 wherein the outer screw threaded portion has an inside face which is curved to follow around the outside curve periphery of the main leg portion.
a rear frame element having two parallel generally upstanding legs extending from a bottom end of each leg at the ground to an upper end, a cross bar, fastening means fastening the cross bar to each of the legs at a position intermediate the bottom and upper ends of the leg and means at the bottom end of each leg for engaging the ground, means coupling the front and rear frame elements for pivotal movement about a substantially horizontal axis passing through each of the legs of the front and rear frame element to allow movement of the front and rear frame element from a closed, folded position in which the bottom ends of the legs of the front and rear elements lie adjacent to an open, operative position of the front and rear frame elements in which the bottom ends of the legs lie at the corners of a rectangle, handle means at the upper end of the legs of the front frame element for grasping by the patient while standing between the legs of the rear frame element, each of the legs of the front and rear frame elements comprising a main leg portion extending from the upper end of the respective leg to a lower end of the main leg portion at an intermediate height of the respective leg and an adjustment portion slidably mounted within a hollow interior of the main leg portion and extending from the lower end of the main leg portion to the bottom end of the respective leg and movable therein in a generally vertical direction to adjust the length of the respective leg, locating means for locating the adjustment portion at a required adjustment position relative to the main leg portion, said fastening means of each leg being arranged to allow sliding movement of an upper end of the adjustment portion of the respective leg inside the main leg portion to a height upwardly of the fastening means.
(2) The walking frame according to Claim 1 wherein each of the cross bars includes a horizontal bar portion and a pair of downwardly turned portions each at a respective end of the horizontal bar portion such that each downwardly depending bar portion lies alongside and parallel to a respective leg and wherein the fastening means is arranged externally of the leg and is arranged to clamp the downturned portion to the leg.
(3) The walking frame according to Claim 2 wherein the fastening means comprises clamping plate means for engaging around the downwardly turned portion and the leg.
(4) The walking frame according to Claim 3 wherein the fastening means comprises a pair of plates each shaped to wrap around one half of the leg and one half of the downwardly turned portion.
(5) The walking frame according to Claim 4 wherein the clamping plates are attached to the downwardly turned portion and the leg by adhesive.
(6) The walking frame according to Claim 1 wherein the rear frame element includes a second cross bar integral with the legs of the rear frame element and formed by bending such that the second cross bar and the legs form a substantially U-shaped member with the legs projecting downwardly.
(7) The walking frame according to Claim 6 including a folding seat member resting upon the cross bars of the front and rear frame elements with the second cross bar of the rear frame element acting as a backrest at a height above the seat.
(8) The walking frame according to Claim 1 including a pair of strap members each extending from a respective one of the legs of the rear frame element to a respective one of the legs of the front frame element so as to hold the front and rear frame elements in the open operative position wherein the locating means also acts to attach the strap means to the respective leg.
(9) The walking frame according to Claim 8 wherein the main leg portion and the adjustment leg portion each comprise a tubular member with the adjustment leg portion slidable inside the tubular portion of the main leg portion, the locating means comprising a screw fastener having a head inside the adjustment portion and engaging the inside surface of the adjustment portion and threaded portion extending through the wall of the adjustment portion, through the wall of the main portion and into engagement with a threaded fastener pressed against the outside surface of the main leg portion, and wherein there is provided an opening in the wall of the adjustment portion and the main leg portion aligned with the head to allow access through the opening for engagement with the head.
(10) The walking frame according to Claim 9 wherein the outer screw threaded portion has an inside face which is curved to follow around the outside curve periphery of the main leg portion.
(11) A walking frame for assisting the walking of an infirm patient comprising a front frame element having two parallel generally upstanding legs extending from a bottom end of each leg closely adjacent to the ground to an upper end of each leg, a cross bar, means fastening the cross bar to each of the legs at a position intermediate the bottom and upper end of the respective leg, a ground wheel mounted at the bottom end of each leg for supporting the bottom end relative to the ground to allow movement of the front frame element across the ground; a rear frame element having two parallel generally upstanding legs extending from a bottom end of each leg at the ground to an upper end, a cross bar, fastening means fastening the cross bar to each of the legs at a position intermediate the bottom and upper ends of the leg and means at the bottom end of each leg for engaging the ground, means coupling the front and rear frame elements for pivotal movement about a substantially horizontal axis passing through each of the legs of the front and rear frame element to allow movement of the front and rear frame element from a closed, folded position in which the bottom ends of the legs of the front and rear elements lie adjacent to an open, operative position of the front and rear frame elements in which the bottom ends of the legs lie at the corners of a rectangle, handle means at the upper end of the legs of the front frame element for grasping by the patient while standing between the legs of the rear frame element, wherein the rear frame element includes a second cross bar integral with the legs of the rear frame element and formed by bending such that the second cross bar on the legs form a substantially U-shaped member with the legs projecting downwardly.
(12) The walking frame according to Claim 11 including a folding seat member resting upon the cross bars of the front and rear frame elements with the second cross bar of the rear frame element acting as a backrest at a height above the seat member.
(13) A walking frame for assisting the walking of an infirm patient comprising a front frame element having two parallel generally upstanding legs extending from a bottom end of each leg closely adjacent to the ground to an upper end of each leg, a cross bar, means fastening the cross bar to each of the legs at a position intermediate the bottom and upper end of the respective leg, a ground wheel mounted at the bottom end of each leg for supporting the bottom end relative to the ground to allow movement of the front frame element across the ground; a rear frame element having two parallel generally upstanding legs extending from a bottom end of each leg at the ground to an upper end, a cross bar, fastening means fastening the cross bar to each of the legs at a position intermediate the bottom and upper ends of the leg and means at the bottom end of each leg for engaging the ground, means coupling the front and rear frame elements for pivotal movement about a substantially horizontal axis passing through each of the legs of the front and rear frame element to allow movement of the front and rear frame element from a closed, folded position in which the bottom ends of the legs of the front and rear elements lie adjacent to an open, operative position of the front and rear frame elements in which the bottom ends of the legs lie at the corners of a rectangle, handle means at the upper end of the legs of the front frame element for grasping by the patient while standing between the legs of the rear frame element, each of the legs of the front and rear frame elements comprising a main leg portion extending from the upper end of the respective leg to a lower end of the main leg portion at an intermediate height of the respective leg and an adjustment portion slidably mounted within a hollow interior of the main leg portion and extending from the lower end of the main leg portion to the bottom end of the respective leg an movable therein in a generally vertical direction to adjust the length of the respective leg, locating means for locating the adjustment portion at a required adjustment position relative to the main leg portion, said fastening means of each leg being arranged to allow sliding movement of an upper end of the adjustment portion of the respective leg inside the main leg portion to a height upwardly of the fastening means, wherein the main leg portion and the adjustment leg portion each comprises a tubular member with the adjustment leg portion slidable inside the tubular portion of the main leg portion, the locating means comprising a screw fastener having a head inside the adjustment portion and engaging the inside surface of the adjustment portion and threaded portion extending through the wall of the adjustment portion, through the wall of the main portion and into engagement with a threaded fastener pressed against the outside surface of the main leg portion, and wherein there is provided an opening in the wall of the adjustment portion and the main leg portion aligned with the head to allow access through the openings for engagement with the head.
(14) The walking frame according to Claim 13 wherein the outer screw threaded portion has an inside face which is curved to follow around the outside curve periphery of the main leg portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2056148 CA2056148A1 (en) | 1991-11-25 | 1991-11-25 | Walking frame for an infirm patient with adjustable leg length |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2056148 CA2056148A1 (en) | 1991-11-25 | 1991-11-25 | Walking frame for an infirm patient with adjustable leg length |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2056148A1 true CA2056148A1 (en) | 1993-05-26 |
Family
ID=4148815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2056148 Abandoned CA2056148A1 (en) | 1991-11-25 | 1991-11-25 | Walking frame for an infirm patient with adjustable leg length |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2056148A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995031954A1 (en) * | 1994-05-20 | 1995-11-30 | Friedman, Mark, M. | Rollable walker |
| US5687984A (en) * | 1995-08-02 | 1997-11-18 | Samuel; Violet S. | Collapsing cart |
| US5716063A (en) * | 1995-03-20 | 1998-02-10 | Csia Research Foundation | Walking aid |
| WO2015175859A1 (en) * | 2014-05-15 | 2015-11-19 | Liles Howard J | Sit-to-stand and walking assistive mobility aid |
-
1991
- 1991-11-25 CA CA 2056148 patent/CA2056148A1/en not_active Abandoned
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995031954A1 (en) * | 1994-05-20 | 1995-11-30 | Friedman, Mark, M. | Rollable walker |
| US5603517A (en) * | 1994-05-20 | 1997-02-18 | Siudon Ltd. | Walkers |
| US5716063A (en) * | 1995-03-20 | 1998-02-10 | Csia Research Foundation | Walking aid |
| US5687984A (en) * | 1995-08-02 | 1997-11-18 | Samuel; Violet S. | Collapsing cart |
| WO2015175859A1 (en) * | 2014-05-15 | 2015-11-19 | Liles Howard J | Sit-to-stand and walking assistive mobility aid |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |