CA1202554A - Lever-operating type of wheelchair - Google Patents
Lever-operating type of wheelchairInfo
- Publication number
- CA1202554A CA1202554A CA000425821A CA425821A CA1202554A CA 1202554 A CA1202554 A CA 1202554A CA 000425821 A CA000425821 A CA 000425821A CA 425821 A CA425821 A CA 425821A CA 1202554 A CA1202554 A CA 1202554A
- Authority
- CA
- Canada
- Prior art keywords
- lever
- wheelchair
- clutch
- frame
- link mechanism
- 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.)
- Expired
Links
Landscapes
- Mechanical Operated Clutches (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A lever-operating type wheelchair includes a differen-tial link mechanism connected to an operational lever, a pair of forward/backward clutch mechanims driven to interlock with the link mechanism, and an expansion joint mechanism provided between the link mechanism and one of the clutch mechanisms.
The lever-operated type wheelchair of this invention has better operational capability in use for one-handed operation due to a fulcrum and a knob of the operational lever arranged so as to make the operation thereof easier.
12.
A lever-operating type wheelchair includes a differen-tial link mechanism connected to an operational lever, a pair of forward/backward clutch mechanims driven to interlock with the link mechanism, and an expansion joint mechanism provided between the link mechanism and one of the clutch mechanisms.
The lever-operated type wheelchair of this invention has better operational capability in use for one-handed operation due to a fulcrum and a knob of the operational lever arranged so as to make the operation thereof easier.
12.
Description
55~
LEVER-OPERATED TYPE OF WHEELCHAIR
___ _ _____ ____~____ ___ BACK~:ROUND OF THE INVENTION
1. Field of th~ Invention The present invention relates to a wheelchair, and more particularly to an automotlve wheelchai.r capable of running forward and backward and turning by means o an operating lever.
_ ior ~rt Conventionally, almost all manually operated wheelchairs are run by operating a ring fixed on the rim of a wheel. This type of wheelchair, however, cannot be run with one hand~ Although a one-handed type wheelchair, which partly includes double rings formed on one side thereof~ is available for use, it is extremely difficult to change direction within a narrow passageway, for example in a hospital, etc.
SUMMARY OF THE INVENTION
In light of the above-mentioned defect t the present invention makes it possible to run a wheelchair with one hand by means of an operational lever provided on the right or left side of the wheelchair.
In accordance with an aspect of the invention there is provided a lever-operating type wheelchair comprising a differential link mechanism in which one end of a driving yoke is connected to the base part of an operational lever and to the middle point of a crossed ~b`'' ~IZ5S~
shaft crossing said operational lever; the other end of said driving yoke is loosely coupled through a crossed bearing to a Erame pin located at the position correspond-ing to the part below the elbow of a frame's side face;
both ends of said crossed shaft are connected through joint yokes to a set of longitudinally arranged torque rods; a pair of forward/backward clutch mechanisms in which: clutch hubs having an outer spring and an inner spring fitted therein by stationary fits are fitted into a hub shaft fixed to frame brackets; projections formed on ends of said springs are inserted into holes made on moving arms pivotally moving around said hub shaft as a center;
projections formed on other ends of said springs make separate contact with releases coupled adjustably to release drums fixed to said frame brackets; said wheelrhair being characterized such that said differential link mech-anism and a pair of said forward/backward clutch mechanisms are coupled through the rod ends arranged in a longitudinal direction to said moving arms of said clu~ch mechanism.
~nother object of the present invention is to provide a lever-operated type wheelchair with better operational capability in one-handed operation. This is accomplished by a fulcrum and a knob on the operational lever which are positioned so as to make the operation of the wheelchair of the present invention easier.
LEVER-OPERATED TYPE OF WHEELCHAIR
___ _ _____ ____~____ ___ BACK~:ROUND OF THE INVENTION
1. Field of th~ Invention The present invention relates to a wheelchair, and more particularly to an automotlve wheelchai.r capable of running forward and backward and turning by means o an operating lever.
_ ior ~rt Conventionally, almost all manually operated wheelchairs are run by operating a ring fixed on the rim of a wheel. This type of wheelchair, however, cannot be run with one hand~ Although a one-handed type wheelchair, which partly includes double rings formed on one side thereof~ is available for use, it is extremely difficult to change direction within a narrow passageway, for example in a hospital, etc.
SUMMARY OF THE INVENTION
In light of the above-mentioned defect t the present invention makes it possible to run a wheelchair with one hand by means of an operational lever provided on the right or left side of the wheelchair.
In accordance with an aspect of the invention there is provided a lever-operating type wheelchair comprising a differential link mechanism in which one end of a driving yoke is connected to the base part of an operational lever and to the middle point of a crossed ~b`'' ~IZ5S~
shaft crossing said operational lever; the other end of said driving yoke is loosely coupled through a crossed bearing to a Erame pin located at the position correspond-ing to the part below the elbow of a frame's side face;
both ends of said crossed shaft are connected through joint yokes to a set of longitudinally arranged torque rods; a pair of forward/backward clutch mechanisms in which: clutch hubs having an outer spring and an inner spring fitted therein by stationary fits are fitted into a hub shaft fixed to frame brackets; projections formed on ends of said springs are inserted into holes made on moving arms pivotally moving around said hub shaft as a center;
projections formed on other ends of said springs make separate contact with releases coupled adjustably to release drums fixed to said frame brackets; said wheelrhair being characterized such that said differential link mech-anism and a pair of said forward/backward clutch mechanisms are coupled through the rod ends arranged in a longitudinal direction to said moving arms of said clu~ch mechanism.
~nother object of the present invention is to provide a lever-operated type wheelchair with better operational capability in one-handed operation. This is accomplished by a fulcrum and a knob on the operational lever which are positioned so as to make the operation of the wheelchair of the present invention easier.
- 2 ~
.... ~
~Z~Z~i5~
BRIEF DESCRIPTION OF TSE DRAWINGS
The description of a preferred embodiment o the present invention will be apparent in conjunction with the accompanying drawings, wherein like reference numerals denote like elements, and in which:
FIGURE 1 is a side view of a wheelchair according to the present invention;
FIGUR~ 2 is a perspective view of the mechanical part excluding the frame;
FI&URE 3 is an e~ploded perspective view of a differential link mechanism;
FIG~R~ 4 illustrates a forward/backward clutch mechanism and an expansion joint mechanism;
FIGURE 5a illustrates a state in the section A-A
o~ Figure 4 wherein the forward operation is made; and - 2a -.
12~Z~iS~
FIGURE 5b illustrates the state in the section A-A of Figure 4, wherein the back operation is made.
DETAILED DESCRIPTION OF THE INVENTION
Figure 1 is a side view of a lever-operating type of wheelchair introduced by the present invention, specifically illustrating a right-handed operating type wheelchair. Fi~ure 2 is a perspective view of the mechanical part of Figure 1 excluding a frame.
The position of a frame pin lb supporting an operational lever 2 is near the lower part of an elbow of the arm of the frame 1 ~n order to relieve fatigue in terms of human-factors engineering.
In Figure 2, a cornponent made by unifying a force by a longitudinal operation, F - B, of the operational lever 2 from its neutral position N and a force produced by a cross operation, R - L of the le~er 2 makes it possible -to run the wheelchair in any optional direction. Specifically, clutch hubs 11 and 11', coupied with right and left wheels by the actuation of the opera-tion lever 2 in the F direction, are adapted to rotate in a forward direction through torque rods 8b and 8a of the differential link mechanism so that the wheel-chair n~oves forward. On the other hand, when the operational lever is actuated in the B direction, the above-mentioned arrange-ment permits the clutch hubs 1] and 11' to rotate in a backward i54 so that the wheelchair moves backward.
When the operational lever 2 is actuated in the R
direction, the right wheel is adapted through the torque rod 8b to rotate to the Bb side, cauasing a backward movement by the clutch huh 11; while the left wheel is adapted through the torque rod 8a to rotate to the Fb side, causing a forward movement by the cluth hub 11', whereby the wheelchair turns to the right. When the operational lever 2 is actuated in the L direction, similarly to the foregoing, the right wheel is adapted to rotate to the Fb side, causing a forward movement;
while the left wheel is adapted to rotate to the Ba side, causing a backward movementr whereby the wheelchair turns to the left.
The actuation of the lever 2 in any intermediate di-rection, e.g. between the forward movement F and the leftwardmovement L or between the bac]cward movement B and the rightward movement R, is determined by a mechanical adjustment of the hubs 11 and 11' on the left an~ right sides of the torque rods 8a and 8b. Namely, differences in the rotational amount between the left and righ-t wheels and the adjustment of a component b~ unifying resultant rotational forces of the wheels permits the wheelchair to move in any optional direction.
Figure 3 is an exploded perspective view of the differential link mechanism shown in Figure 2. One end of a driving yoke 3 is connected at right angles with the base part ~2S54 of the operational lever 2 and with the middle point of a crossed shaft 4 crossing the operational lever 2. The bifur-cated end of the yoke 3 is loosely inserted through a crossed ~earing 5 into a frame pin lb projecting at the position cor-responding to the lower part of an elbow of a frame plate la.Both ends of the above-mentioned crossed shaft 4 are loosely equipped with joint yokes 6a and 6b and are connected through coupling pins 7a and 7b inserted into the joint yokes 6a and 6b to the torque rods 8a and 8b, respectively, which are positioned in a longitudinal direction.
As shown in Figure 2, the torque rod 8b is directly connected through a rod end lOb with a moving arm 9b of the right clutch hub 11. The torque rod 8a is connected with the moving arm 9'c of the left clutch hub 11' through an expansion joint mechanism comprising a torque arm 9a, a grooved pulley 17, a torque tube 18, an expansion shaft 20 and a crank arm 21.
I~amely, when the operational lever 2 is moved in the F - ~ direction as shown in Figure 2, the driving yo~e 3 pivotally rotates about the X - X axis as a center. The rnovement of the lever 2 in the R - L direction permits the driving yoke 3 to pivotally rotate about the Y- Y axis as a center. In other words, every movernent of the operational leverl 2 can be modified by the foregoing differential mechanism with the moving arm 9b and the torque arm 9a.
Figure 4 is a partially cu~away sirle view illustra-ting I
5.
the state in which a forward/backward clutch mechanism is connected with an expansion joint mechanism. Figure 5 is a sectional view, taken along the line A - A of Figure 4, illustrating the sta-te in which the clutch is actuated.
In Fiyures 4, 5a and Sb, annular grooves provided face-to-face in the cluth hub 11 rotating around a hub shaft 25, as a center, fixed to a frame bracket 24 by screws, have an outer spring 12 and an inner spring 13 fitted therein by stationary fits. One end of each spring 12 and 13 is radially equipped with prcjections 12x and 13x. The projections 12x and 13x, respectively, make contact wi-th releases 14f and 14b adjustably ~ixed to the frame bracket 24, when the moving arm 9b fitted in the hub shaft 25 is located near the neutral posi-tion N. The other end of the spring 12 and 13 is axially equipped with projections 12y and 13y, which are inserted in holes made in the moving arm 9b rotating round the hub shaft 25 as a center.
Referring now to Figure 5a, when -the moving arm 9b shifts in a directionfrom ~ to Fb, a resultant force is trans-Eerred to the annular groove provided along the inner face ofthe wall of the clutch hub 11 by the outer spring 12. The clutch hub 11 then rotates in the Fb direction and, subsequ2ntly, the projcction 12x of the outer spring 12 is moved to 12x, where the outer spring 12 stops, so that the outer spring 12 is rather 2S closed, permitting the cluth hub 11 to overrun. That is, the 559~
wheelchair can take coasting by inertia. At that tirrle the projection 13x of the inner spring 13 main-tains in contact with the above-mentioned release 14b, and the inside diameter of the inner spring 13 is 1ncreased so that the connection of the inner spring 13 with the inner groove in the clutch hub 11 is cut off, whereby a torque is not transferred from the inner spring 13 to the clutch hub 11.
Figure 5b illustrates a state in which the moviny arm 9b is shifted in a direction from l~ to Bb. The function of the outer spring 12 and that of the inner spring 13 shown in Figure 5a are reversed. The resultant force is transferred to the annular groove provided on the cylindrical ou-ter wall of the clutch hum 11 by the inner spring 13. The clutch hub 11 then rotates in Bb direction and, subsequently, -the inner spring 13 stops so that the inner spring 12 is rather opened, permitting the clutch hub 11 to overrun. ~t that time, the contact of the projection 12x of the outer spring 12 with the release 14f causes the outside diarneter of the outer spring 12 to be decreased, slmilar to the foregoing, whereby the torque is not transferred ~rom the outer spring 12 to the clutch hub 11.
Each of the releases 14f and 14b, which is provided in an op-liollal posi-tion of a long hole provided on a release drum 15 ~ixed to the frame bracket 24, allows a clutch point to be adjusted. ~eference numeral 15'c in Figure 4 is a long groove provided in the release drum 15' on the opposite side of the drum 15.
ZS5~
Referring to Figure 4, when the torque is transferred from the clutch hub 11 to the opposite clutch hum 11', the torque follows the course in sequence of: rod end lOa stay bolt 16 --~ torque arm 9a ~-~ grooved pulley 17 ~ torque pin 19 ~ torque tube 18~ torque pin 19'~ expansion shaft 20 ~ crank arm 21~ crank pin 22 ~--~ moving arm 9c.
The expansion joint mechanism indicated by the above-mentioned grooved pulley 17 through the expansion shaft 20 has a spring 23 in the torque tube 18 and, at the same time, couples separably to the torque pin 19 and the yroove pulley 17. As a result, it is possible in one operation to collapse the frame when transportatlon of the wheelchair is required. In addition, error in assembling the frame can be absorbed.
It is apparent from the foregoing that the present invention leads to the ease in operating a wheelchair with one hand by positioning the operational lever to facilitate the operation thereof, displays effectiveness as a one-handed operating type wheelchair and produces a marked a~vantage as a rehabi]itating apparatus. In addition to this, the wheel-chair of the present invention has the same superior operationalcapability as expected when it is put into practical use.
It should be apparent to those skilled in the art that the above-described embodiments are merely illustrates of but a few of the many specific embodiments which represent the applica-tions of the principles of the present invention. Numerous and 255~
varied other arrangements can be readily devised by those skilledin the art without departing from the spirit and the scope of the invention.
.... ~
~Z~Z~i5~
BRIEF DESCRIPTION OF TSE DRAWINGS
The description of a preferred embodiment o the present invention will be apparent in conjunction with the accompanying drawings, wherein like reference numerals denote like elements, and in which:
FIGURE 1 is a side view of a wheelchair according to the present invention;
FIGUR~ 2 is a perspective view of the mechanical part excluding the frame;
FI&URE 3 is an e~ploded perspective view of a differential link mechanism;
FIG~R~ 4 illustrates a forward/backward clutch mechanism and an expansion joint mechanism;
FIGURE 5a illustrates a state in the section A-A
o~ Figure 4 wherein the forward operation is made; and - 2a -.
12~Z~iS~
FIGURE 5b illustrates the state in the section A-A of Figure 4, wherein the back operation is made.
DETAILED DESCRIPTION OF THE INVENTION
Figure 1 is a side view of a lever-operating type of wheelchair introduced by the present invention, specifically illustrating a right-handed operating type wheelchair. Fi~ure 2 is a perspective view of the mechanical part of Figure 1 excluding a frame.
The position of a frame pin lb supporting an operational lever 2 is near the lower part of an elbow of the arm of the frame 1 ~n order to relieve fatigue in terms of human-factors engineering.
In Figure 2, a cornponent made by unifying a force by a longitudinal operation, F - B, of the operational lever 2 from its neutral position N and a force produced by a cross operation, R - L of the le~er 2 makes it possible -to run the wheelchair in any optional direction. Specifically, clutch hubs 11 and 11', coupied with right and left wheels by the actuation of the opera-tion lever 2 in the F direction, are adapted to rotate in a forward direction through torque rods 8b and 8a of the differential link mechanism so that the wheel-chair n~oves forward. On the other hand, when the operational lever is actuated in the B direction, the above-mentioned arrange-ment permits the clutch hubs 1] and 11' to rotate in a backward i54 so that the wheelchair moves backward.
When the operational lever 2 is actuated in the R
direction, the right wheel is adapted through the torque rod 8b to rotate to the Bb side, cauasing a backward movement by the clutch huh 11; while the left wheel is adapted through the torque rod 8a to rotate to the Fb side, causing a forward movement by the cluth hub 11', whereby the wheelchair turns to the right. When the operational lever 2 is actuated in the L direction, similarly to the foregoing, the right wheel is adapted to rotate to the Fb side, causing a forward movement;
while the left wheel is adapted to rotate to the Ba side, causing a backward movementr whereby the wheelchair turns to the left.
The actuation of the lever 2 in any intermediate di-rection, e.g. between the forward movement F and the leftwardmovement L or between the bac]cward movement B and the rightward movement R, is determined by a mechanical adjustment of the hubs 11 and 11' on the left an~ right sides of the torque rods 8a and 8b. Namely, differences in the rotational amount between the left and righ-t wheels and the adjustment of a component b~ unifying resultant rotational forces of the wheels permits the wheelchair to move in any optional direction.
Figure 3 is an exploded perspective view of the differential link mechanism shown in Figure 2. One end of a driving yoke 3 is connected at right angles with the base part ~2S54 of the operational lever 2 and with the middle point of a crossed shaft 4 crossing the operational lever 2. The bifur-cated end of the yoke 3 is loosely inserted through a crossed ~earing 5 into a frame pin lb projecting at the position cor-responding to the lower part of an elbow of a frame plate la.Both ends of the above-mentioned crossed shaft 4 are loosely equipped with joint yokes 6a and 6b and are connected through coupling pins 7a and 7b inserted into the joint yokes 6a and 6b to the torque rods 8a and 8b, respectively, which are positioned in a longitudinal direction.
As shown in Figure 2, the torque rod 8b is directly connected through a rod end lOb with a moving arm 9b of the right clutch hub 11. The torque rod 8a is connected with the moving arm 9'c of the left clutch hub 11' through an expansion joint mechanism comprising a torque arm 9a, a grooved pulley 17, a torque tube 18, an expansion shaft 20 and a crank arm 21.
I~amely, when the operational lever 2 is moved in the F - ~ direction as shown in Figure 2, the driving yo~e 3 pivotally rotates about the X - X axis as a center. The rnovement of the lever 2 in the R - L direction permits the driving yoke 3 to pivotally rotate about the Y- Y axis as a center. In other words, every movernent of the operational leverl 2 can be modified by the foregoing differential mechanism with the moving arm 9b and the torque arm 9a.
Figure 4 is a partially cu~away sirle view illustra-ting I
5.
the state in which a forward/backward clutch mechanism is connected with an expansion joint mechanism. Figure 5 is a sectional view, taken along the line A - A of Figure 4, illustrating the sta-te in which the clutch is actuated.
In Fiyures 4, 5a and Sb, annular grooves provided face-to-face in the cluth hub 11 rotating around a hub shaft 25, as a center, fixed to a frame bracket 24 by screws, have an outer spring 12 and an inner spring 13 fitted therein by stationary fits. One end of each spring 12 and 13 is radially equipped with prcjections 12x and 13x. The projections 12x and 13x, respectively, make contact wi-th releases 14f and 14b adjustably ~ixed to the frame bracket 24, when the moving arm 9b fitted in the hub shaft 25 is located near the neutral posi-tion N. The other end of the spring 12 and 13 is axially equipped with projections 12y and 13y, which are inserted in holes made in the moving arm 9b rotating round the hub shaft 25 as a center.
Referring now to Figure 5a, when -the moving arm 9b shifts in a directionfrom ~ to Fb, a resultant force is trans-Eerred to the annular groove provided along the inner face ofthe wall of the clutch hub 11 by the outer spring 12. The clutch hub 11 then rotates in the Fb direction and, subsequ2ntly, the projcction 12x of the outer spring 12 is moved to 12x, where the outer spring 12 stops, so that the outer spring 12 is rather 2S closed, permitting the cluth hub 11 to overrun. That is, the 559~
wheelchair can take coasting by inertia. At that tirrle the projection 13x of the inner spring 13 main-tains in contact with the above-mentioned release 14b, and the inside diameter of the inner spring 13 is 1ncreased so that the connection of the inner spring 13 with the inner groove in the clutch hub 11 is cut off, whereby a torque is not transferred from the inner spring 13 to the clutch hub 11.
Figure 5b illustrates a state in which the moviny arm 9b is shifted in a direction from l~ to Bb. The function of the outer spring 12 and that of the inner spring 13 shown in Figure 5a are reversed. The resultant force is transferred to the annular groove provided on the cylindrical ou-ter wall of the clutch hum 11 by the inner spring 13. The clutch hub 11 then rotates in Bb direction and, subsequently, -the inner spring 13 stops so that the inner spring 12 is rather opened, permitting the clutch hub 11 to overrun. ~t that time, the contact of the projection 12x of the outer spring 12 with the release 14f causes the outside diarneter of the outer spring 12 to be decreased, slmilar to the foregoing, whereby the torque is not transferred ~rom the outer spring 12 to the clutch hub 11.
Each of the releases 14f and 14b, which is provided in an op-liollal posi-tion of a long hole provided on a release drum 15 ~ixed to the frame bracket 24, allows a clutch point to be adjusted. ~eference numeral 15'c in Figure 4 is a long groove provided in the release drum 15' on the opposite side of the drum 15.
ZS5~
Referring to Figure 4, when the torque is transferred from the clutch hub 11 to the opposite clutch hum 11', the torque follows the course in sequence of: rod end lOa stay bolt 16 --~ torque arm 9a ~-~ grooved pulley 17 ~ torque pin 19 ~ torque tube 18~ torque pin 19'~ expansion shaft 20 ~ crank arm 21~ crank pin 22 ~--~ moving arm 9c.
The expansion joint mechanism indicated by the above-mentioned grooved pulley 17 through the expansion shaft 20 has a spring 23 in the torque tube 18 and, at the same time, couples separably to the torque pin 19 and the yroove pulley 17. As a result, it is possible in one operation to collapse the frame when transportatlon of the wheelchair is required. In addition, error in assembling the frame can be absorbed.
It is apparent from the foregoing that the present invention leads to the ease in operating a wheelchair with one hand by positioning the operational lever to facilitate the operation thereof, displays effectiveness as a one-handed operating type wheelchair and produces a marked a~vantage as a rehabi]itating apparatus. In addition to this, the wheel-chair of the present invention has the same superior operationalcapability as expected when it is put into practical use.
It should be apparent to those skilled in the art that the above-described embodiments are merely illustrates of but a few of the many specific embodiments which represent the applica-tions of the principles of the present invention. Numerous and 255~
varied other arrangements can be readily devised by those skilledin the art without departing from the spirit and the scope of the invention.
Claims (2)
1. A lever-operating type wheelchair comprising:
a differential link mechanism in which:
one end of a driving yoke is connected to the base part of an operational lever and to the middle point of a crossed shaft crossing said operational lever;
the other end of said driving yoke is loosely coupled through a crossed bearing to a frame pin located at the position corresponding to the part below the elbow of a frame's side face;
both ends of said crossed shaft are connected through joint yokes to a set of longitudinally arranged torque roeds;
a pair of forward/backward clutch mechanisms in which:
clutch hubs having an outer spring and an inner spring fitted therein by stationary fits are fitted into a hub shaft fixed to frame brackets;
projections formed on ends of said springs are inserted into holes made on moving arms pivotally moving around said hub shaft as a center;
projections formed on other ends of said springs make separate contact with releases coupled adjustably to release drums fixed to said frame brackets;
said wheelchair being characterized such that said 10.
differential link mechanism and a pair of said forward/backward clutch mechanisms are coupled through the rod ends arranged in a longitudinal direction to said moving arms of said clutch mechanism.
a differential link mechanism in which:
one end of a driving yoke is connected to the base part of an operational lever and to the middle point of a crossed shaft crossing said operational lever;
the other end of said driving yoke is loosely coupled through a crossed bearing to a frame pin located at the position corresponding to the part below the elbow of a frame's side face;
both ends of said crossed shaft are connected through joint yokes to a set of longitudinally arranged torque roeds;
a pair of forward/backward clutch mechanisms in which:
clutch hubs having an outer spring and an inner spring fitted therein by stationary fits are fitted into a hub shaft fixed to frame brackets;
projections formed on ends of said springs are inserted into holes made on moving arms pivotally moving around said hub shaft as a center;
projections formed on other ends of said springs make separate contact with releases coupled adjustably to release drums fixed to said frame brackets;
said wheelchair being characterized such that said 10.
differential link mechanism and a pair of said forward/backward clutch mechanisms are coupled through the rod ends arranged in a longitudinal direction to said moving arms of said clutch mechanism.
2. A lever-operating type wheelchair according to Claim 1, characterized in that one of a pair of connection of said rod ends with said moving arms is made through an expan-sion joint mechanism.
11.
11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000425821A CA1202554A (en) | 1983-04-06 | 1983-04-06 | Lever-operating type of wheelchair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000425821A CA1202554A (en) | 1983-04-06 | 1983-04-06 | Lever-operating type of wheelchair |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1202554A true CA1202554A (en) | 1986-04-01 |
Family
ID=4125006
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000425821A Expired CA1202554A (en) | 1983-04-06 | 1983-04-06 | Lever-operating type of wheelchair |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1202554A (en) |
-
1983
- 1983-04-06 CA CA000425821A patent/CA1202554A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |