WO2021061696A1 - Trottinette pliante - Google Patents

Trottinette pliante Download PDF

Info

Publication number
WO2021061696A1
WO2021061696A1 PCT/US2020/052098 US2020052098W WO2021061696A1 WO 2021061696 A1 WO2021061696 A1 WO 2021061696A1 US 2020052098 W US2020052098 W US 2020052098W WO 2021061696 A1 WO2021061696 A1 WO 2021061696A1
Authority
WO
WIPO (PCT)
Prior art keywords
scooter
collar
frame
tubular column
assembly
Prior art date
Application number
PCT/US2020/052098
Other languages
English (en)
Inventor
Robert E. NEVILLE
Garrett R. NEVILLE
Original Assignee
Pro-Motion Mobile Medical Marketing, LLC
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from US16/585,743 external-priority patent/US10717491B1/en
Application filed by Pro-Motion Mobile Medical Marketing, LLC filed Critical Pro-Motion Mobile Medical Marketing, LLC
Publication of WO2021061696A1 publication Critical patent/WO2021061696A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H1/00—Apparatus for passive exercising; Vibrating apparatus; Chiropractic devices, e.g. body impacting devices, external devices for briefly extending or aligning unbroken bones
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H3/00—Appliances for aiding patients or disabled persons to walk about
    • A61H3/04—Wheeled walking aids for patients or disabled persons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K15/00—Collapsible or foldable cycles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K21/00—Steering devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K3/00—Bicycles
    • B62K3/002—Bicycles without a seat, i.e. the rider operating the vehicle in a standing position, e.g. non-motorized scooters; non-motorized scooters with skis or runners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K5/00—Cycles with handlebars, equipped with three or more main road wheels
    • B62K5/003—Cycles with four or more wheels, specially adapted for disabled riders, e.g. personal mobility type vehicles with four wheels
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H3/00—Appliances for aiding patients or disabled persons to walk about
    • A61H3/04—Wheeled walking aids for patients or disabled persons
    • A61H2003/046—Wheeled walking aids for patients or disabled persons with braking means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H2201/00—Characteristics of apparatus not provided for in the preceding codes
    • A61H2201/01—Constructive details
    • A61H2201/0161—Size reducing arrangements when not in use, for stowing or transport
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H2201/00—Characteristics of apparatus not provided for in the preceding codes
    • A61H2201/01—Constructive details
    • A61H2201/0192—Specific means for adjusting dimensions
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
    • A61H2201/00—Characteristics of apparatus not provided for in the preceding codes
    • A61H2201/16—Physical interface with patient
    • A61H2201/1602—Physical interface with patient kind of interface, e.g. head rest, knee support or lumbar support
    • A61H2201/1628—Pelvis
    • A61H2201/1633—Seat

Definitions

  • the present invention relates to manually propelled scooters for use by an individual having an injured leg and, more particularly, to folding knee scooters.
  • Knee scooters are generally used when the user has one disabled leg that has been injured to the extent that walking is either quite painful or precluded.
  • these knee scooters have a wheeled frame on which is mounted a padded support or the like such that the user can rest the shin and/or knee of the disabled leg on the padded support while grasping suitable handle bars to affect steering, the ambulatory leg of the user being used to propel the scooter.
  • the present invention provides a knee scooter which is collapsible or foldable for storage and/or transport.
  • the present invention provides a foldable knee scooter which can be selectively moved from a first, folded position into a second, expanded or use position.
  • the present invention provides a foldable knee scooter which can be selectively latched or locked in a folded position for storage or transport or in an expanded position for use.
  • Fig. 1 is a side elevational view of one embodiment of the knee scooter of the present invention.
  • Fig. 2 is a side elevational view of the scooter of Fig. 1 in a folded position for storage or transport.
  • Fig. 3 is a perspective view of another embodiment of the knee scooter of the present invention.
  • Fig. 4 is a front elevational view of the scooter of Fig. 3.
  • Fig. 5 is a side elevational view of the scooter of Fig. 3.
  • Fig. 6 is a front elevational view of the scooter of Fig. 3 in a folded position for storage or transport.
  • Fig. 7 is a side elevational view of the scooter of Fig. 3 in a folded position for storage or transport.
  • Fig. 8 is a top partial view showing the front wheel assembly of the scooter of Fig. 3.
  • Fig. 9 is a front elevational view, partly in section, showing the front wheel assembly of the scooter of Fig. 3.
  • Fig. 10 is a view similar to Fig. 8, showing the angles achieved when turning the front wheel assembly of the scooter of Fig. 3.
  • Fig. 11 is a view similar to Fig. 9 showing the angles achieved when turning the front wheel assembly of the scooter of Fig 3.
  • one embodiment of the scooter of the present invention shown generally as 10, comprises a frame shown generally as 12, a head stock assembly shown generally as 14, a preferably padded knee or leg support 16 mounted on frame 12, a front wheel assembly shown generally as 18, and a rear wheel assembly shown generally as 20.
  • Frame 12 comprises a strut 22 and a strut 24 connected to strut 22 at an obtuse angle thereto.
  • a rear wheel assembly 20 Connected to the end of strut 24 distal strut 22 is a rear wheel assembly 20.
  • Flead stock assembly 14 comprises a tubular column 26 in which is rotatably journaled a handle bar stem 28 shown in phantom.
  • a front wheel assembly 18 is connected to handle bar stem 28 adjacent the lower end of column 26.
  • Handle bars or other such hand grips 30 are interconnected to handle bar stem 28 whereby rotation of handle bars 30 results in rotation of handle bar stem 28 and concomitant rotation of front wheel assembly 18.
  • the term “wheel assembly” as used herein can refer to a single wheel or two wheels.
  • the scooter 10 could have a single front wheel and a single rear wheel, albeit that may be undesirable for a person with a leg injury. More commonly, one of the front wheel assembly 18 or the rear wheel assembly 20 could be of the two-wheeled variety, and the other of the one-wheeled variety.
  • wheel assemblies 18 and 20 could both be comprised of two wheels laterally spaced and rotatably mounted on suitable axles.
  • scooter 10 is in the expanded or use position. In this position, a person with an injured leg, foot, or knee could place the knee/shin of the injured leg on the support 16, grasp the handle bars 30 and propel scooter 10 with the ambulatory leg. It should be noted that the scooter 10 of the present invention may be used irrespective of which of the user’s legs is injured.
  • scooter 10 is shown in the collapsed, or folded position for storage and/or transport, e.g., placing in the trunk of a car. Movement between the expanded position shown in Fig. 1 and the folded position shown in Fig. 2 is effected via a hinge assembly shown generally as 40.
  • hinge assembly 40 comprises a collar portion 42 slidably mounted on column 28 and a selectively releasable latch assembly 44. Flinge assembly 40 is described more fully in US 15/920,890.
  • Scooter 10 can also be provided with a rear brake assembly controlled by brake cable 120 and brake lever 122.
  • the height of handle bar 30 can be vertically adjusted with an adjustment knob assembly 130 such as for example a knob plunger pin, a pull plunger pin, or a pop pin.
  • the locking assembly 130 is of a type that, when engaged, eliminates any play between handle 30 and handle bar stem 28.
  • support or knee rest 16 can be adjusted in height by positioning seat stem 132 at a desired location in sleeve 134.
  • a locking assembly described above with respect to locking assembly 130 can be employed.
  • a simple ball detent arrangement can be employed to releasably, selectively lock stem 132 at various positions in sleeve 134.
  • the scooter shown generally as 200, comprises a collapsible frame shown generally as 212, a head stock assembly shown generally as 214, a preferably padded knee or leg support 216 mounted on frame 212, a front wheel assembly shown generally as 400, and a rear wheel assembly shown generally as 500.
  • Frame 212 comprises a pair of parallel main struts 222 connected to another pair of parallel struts 224, by pin joint 223. Connected to the end of struts 222, distal struts 224, is front wheel assembly 400. Struts 222 are connected to front wheel assembly 400 by stubs 230 and pin joint 221. Connected to the end of struts 224 distal struts 222, is rear wheel assembly 500. Thus the main struts of frame 212 extend from the front wheel assembly to the rear wheel assembly. Frame 212 further comprises parallel support struts 226 connected to parallel support struts 228, by pin joint 225.
  • Support struts 228, are connected, distal struts 226, to main struts 224, by a pair of pin joints 229.
  • Support struts 226 are connected, distal struts 228, to collar 302 by pin joint 227. The importance of collar 302 will be explained more fully later.
  • a pair of pin joints 231 can be used to keep struts 222, and 226 in proper position relative to one another, while allowing pivotal movement around pin joint 231.
  • pin joints 221, 223, 225, 227, and 229 and the exact form of their connection to the various frame components can vary.
  • the critical aspect is that the struts are able to at least partially pivot around the pin joints.
  • Various bearings, bushings, fasteners and the like will be used throughout scooter 200. Their use is standard and well understood by those of skill in the art and will thus not be specifically set forth here.
  • Leg support 216 is connected to frame 212 by plate 240.
  • a series of screws 242 extend through holes 243 in plate 240 into registering holes (not shown) in leg support 216.
  • Plate 240 is attached by bracket 241 to pin joint 223 and to a support arm 246 by bracket 248 and pin joint 247.
  • Support arm 246 is in turn pivotally connected to pin joint 225.
  • support arm 246 is telescoping or otherwise adjustable in length by means well known to those skilled in the art.
  • U-shaped member 244 is removably positioned between leg support 216 and plate 240. Like leg support 216, U- shaped member 244 has holes (not shown) for receiving screws 242. U-shaped member 244 has parallel downwardly extending surfaces 245. Adhesive reflectors, stickers, or the like can be placed on surfaces 245 to improve the visibility of the scooter in the dark. Alternatively, customized logos, advertising or the like can be displayed on surfaces 245, allowing a user to personalize the scooter.
  • Head stock assembly 214 comprises a tubular column 250 in which is rotatably journaled a steering shaft 252.
  • Front wheel assembly 400 is connected to steering shaft 252 adjacent the lower end of column 250.
  • a handle bar or other such hand grip 254 is interconnected to the upper end of steering shaft 253 whereby rotation of handle bar 254 results in rotation steering shaft 252 and concomitant rotation of front wheel assembly 400. Details of front wheel assembly 400 will be discussed later.
  • Brake lever 256 is positioned on handle bars 254. Brake lever 256 operates through a brake cable (not shown) to stop the movement of the wheels of front wheel assembly 400 and/or rear wheel assembly 500 in a manner well known to those skilled in the art.
  • steering shaft 252 telescopes into a narrower section 253 such that the height of handle bar 254 can be adjusted.
  • An adjustment knob assembly 258 such as for example a knob plunger pin, a pull plunger pin, or a pop pin engages the narrower upper portion 253 of steering shaft 252 and uses friction to hold the handle bar 254 at the desired height.
  • head stock assembly 214 includes upper and lower crutch holders 260 and 262, respectively.
  • Crutch holders 260 and 262 are positioned on column 250.
  • Upper holders 260 comprise a pair of laterally extending grippers 264.
  • Lower holders 262 comprise a pair of cups or recessed pads 266. It is common for a person with an injured or healing leg to use crutches. Even those who use a knee scooter such as shown in the present invention will likely need crutches in certain areas.
  • the crutch holders 260 and 262 are designed to allow a person to removably attach the crutches to the scooter. The upper part of a crutch is secured by gripper 264, while the end of the crutch rests in one of cups 266.
  • crutch holders 260 and 262 may also be used to hold walking canes, umbrellas, etc.
  • upper crutch holder 260 includes an attachment point 263 for attaching additional accessories such as a basket. As shown in Figs. 3-5, the scooter 200 is in the expanded or use position.
  • FIGS 6-7 depict scooter 200 in the folded or collapsed position.
  • Latch assembly 300 is comprised of collar 302 disposed on column 250, pin 304, knob 306, and handle 308.
  • Pin 304 extends through a hole 310 in collar 302 and engages column 250. In one embodiment pin 304 simply engages the surface of column 250 and uses friction to hold collar 302 in position.
  • column 250 has one or more holes 312 for receiving pin 304 and thereby preventing movement of collar 302.
  • collar 302 When the scooter is in the expanded position, collar 302 is in its lowest position on column 250.
  • Pin 304 extends through hole 310 in collar 302 and extends through a registering hole 312 in column 250.
  • the user can grip handle 308 and using two fingers pull knob 306 away from column 250. This will pull pin 304 out of engagement with column 250, e.g., out of hole 312, and allow for movement of collar 302.
  • pin 304 and knob 306 are of an indexing type in which pin 304 is spring loaded as is well known to those skilled in the art. Thus, pin 304 is normally biased outwardly away from knob 305.
  • column 250 will have a plurality of holes 312, at least one near the lowest position of collar 302, and one at the uppermost position of collar 302, for receipt of pin 304. This nesting of pin 304 within holes 312 will ensure unintentional vertical movement of collar 302 is prevented.
  • collar 250 has a series of holes 312 along its length. In addition to providing a means for locking scooter 200 in the fully expanded or fully collapsed positions, these additional holes 312 will allow for adjustment of the height of leg support 216.
  • scooter 200 is shown expanded. But, what if leg support 216 is too low for a taller user to comfortably rest their leg on? Collar 302 would be moved upward to the next position on column 250. This would cause seat 216 to tilt with the front end higher than the back. Telescoping support arm 246 would then be extended to bring seat 216 to a level position. Thus, the height of seat 216 can be adjusted to accommodate different users.
  • the “extended” position for a particular user may not in fact be the most extended position possible by scooter 200, but would simply be the extended position at which the user is still comfortable.
  • Latching system 300 and telescoping support arm 246 thus provide the flexibility for the scooter to be used by people of varying height.
  • Scooter 200 is designed such that, when it is fully collapsed, the footprint is as small as possible. This allows for easier transport and storage.
  • seat 216 is tilted and remains below the height of handlebars 254.
  • the rear wheels 502 are closer to one another than are the front wheels 402 to one another.
  • handle 308 can be used to pull scooter 200 around on rear wheels 502.
  • FIGs. 8-11 there is shown front wheel assembly 400 and, in particular, the unique steering system of scooter 200.
  • the steering system of scooter 200 employs the functions of Ackermann steering, caster, and camber.
  • Ackermann steering prevents tires from slipping on turns by using a system of linkages which allow the inside tire to turn at a greater angle than the outside tire.
  • Caster is the slope of the steering axis. The steering axis found by drawing a line drawn through the upper and lower joints of the steering knuckle. Positive caster is when the bottom of the steering axis line is in front of the tire's contact patch. Positive caster ensures good stability, helps maintain straight-ahead direction and promotes self-centering of the steering system.
  • Camber is the inward or outward tilt of the front tires as viewed from the front. Camber is used to distribute load across the entire tread.
  • Steering shaft 252 is connected by center link 404 to a plurality of tie rods 406.
  • Each tie rod 406 is in turn connected to a steering knuckle 408 of the type well known to those skilled in the art.
  • Each steering knuckle 408 comprises a center pin or spindle 412.
  • a first arm 414 extends from pin 412 and connects to tie rod 406.
  • a second arm 416 extends from pin 412 and connects to wheel 402.
  • Each end of each tie rod 406 comprises a ball joint connection 410, thus allowing the tie rods to turn and tilt relative to center link 404 and steering knuckles 408.
  • Rotation of steering shaft 252 causes rotation of center link 404.
  • center link 404 causes tie rods 406 to move, thus causing rotation of pin 412 in steering knuckle 408 and concomitant rotation of wheel 402.
  • the steering system may include additional bearings, bushings, or fastenings which will not be described herein but which are common to such systems and will be readily understood by those skilled in the art.
  • FIGs. 10 and 11 there is shown an example of front wheel assembly when the steering shaft 252 has been turned toward the left by a person using scooter 200.
  • both front wheels are simply be identified as 402.
  • front wheels 402 will be differentiated as inside wheel 402A and outside wheel 402B. It will be understood, that if the scooter were to be turned the opposite direction, the inside wheel and outside wheel would naturally be the opposite wheels as those described in Figs. 10 and 11.
  • inside wheel 402A has turned at a greater angle than that of outside wheel 402B.
  • Outside wheel 402B has turned at an angle of a relative to centerline C.
  • Inside wheel 402A has turned at an angle of a + Da.
  • Outside wheel 402B has a larger turning radius, R, compared to that of wheel 402A, R - AR.
  • R turning radius
  • the combination of Ackermann steering, caster, and camber, of the front wheel assembly 400 of scooter 200 improves the ability of scooter 200 to make sharp turns. A person with an injured leg, trying to turn the scooter would not want to find themselves unable to make a turn and thus have to quite literally hop the scooter around the corner.
  • Scooter 200 is able to make tight turns and the self-centering caster of the system allows for smooth transition from turns to straightaways.
  • Rear wheels 502 of scooter 200 remain straight.
  • rear wheel assembly 500 is comprised of rear wheels 502 connected to an axle in a manner well understood by those skilled in the art.
  • the lock front wheels 402 when collapsed, tilt and lock such that scooter 200 cannot be moved forward.
  • Pin joint 221 is connected to column 250 by welding or the like.
  • the movement of frame 212, particularly struts 222 pulls pin joint 221 upward a bit. This accordingly pulls column 250 and center link 404 upward as well.
  • center link 404 is up and thus tie rods 406 are tilted at an angle such that wheels 402 tilt into a toe-in position. In this position, wheels 402 cannot roll forward. This prevents the unintentional rolling away of scooter 200 when it is not in use.

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  • Health & Medical Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Animal Behavior & Ethology (AREA)
  • Rehabilitation Therapy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Pain & Pain Management (AREA)
  • Epidemiology (AREA)
  • Motorcycle And Bicycle Frame (AREA)

Abstract

L'invention concerne une trottinette comprenant un cadre pliable relié de manière pivotante à un ensemble de poupée. Un support de jambe est monté sur le cadre. L'ensemble poupée comprend une tige de guidon ayant un ensemble roue fixé à son extrémité inférieure. Un second ensemble roue est fixé à l'ensemble cadre. Le cadre est pliable pour permettre à la trottinette de passer d'une position d'utilisation étendue à une position pliée ou repliée pour le stockage.
PCT/US2020/052098 2019-09-27 2020-09-23 Trottinette pliante WO2021061696A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US16/585,743 US10717491B1 (en) 2017-03-14 2019-09-27 Folding scooter
US16/585,743 2019-09-27

Publications (1)

Publication Number Publication Date
WO2021061696A1 true WO2021061696A1 (fr) 2021-04-01

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ID=75166418

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2020/052098 WO2021061696A1 (fr) 2019-09-27 2020-09-23 Trottinette pliante

Country Status (1)

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WO (1) WO2021061696A1 (fr)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3419283A (en) * 1965-08-17 1968-12-31 Newland David Edward Folding bicycles
US6595536B1 (en) * 1999-12-29 2003-07-22 Timothy R. Tucker Collapsible vehicle
US6641159B1 (en) * 2002-10-29 2003-11-04 Jeeng-Neng Fan Compound drive foldable bicycle
US7055842B1 (en) * 2004-12-17 2006-06-06 Kentfa Advanced Technology Corp. Folding electric bicycle
US20070057482A1 (en) * 2005-09-13 2007-03-15 Yu-Tu Hsu Folding bicycle
US20090152829A1 (en) * 2007-12-14 2009-06-18 Michael Dale Anderson Knee scooter
US20120280467A1 (en) * 2010-08-20 2012-11-08 Medline Industries, Inc. Knee walker
US8608184B2 (en) * 2009-11-06 2013-12-17 Leonard R. Janis Mobility assistance device
US20170165146A1 (en) * 2015-12-15 2017-06-15 Justin Franson Medical knee walker
US20170332748A1 (en) * 2016-05-23 2017-11-23 Medical Depot, Inc. Walking cane clamp and base for use with walkers and rollators

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3419283A (en) * 1965-08-17 1968-12-31 Newland David Edward Folding bicycles
US6595536B1 (en) * 1999-12-29 2003-07-22 Timothy R. Tucker Collapsible vehicle
US6641159B1 (en) * 2002-10-29 2003-11-04 Jeeng-Neng Fan Compound drive foldable bicycle
US7055842B1 (en) * 2004-12-17 2006-06-06 Kentfa Advanced Technology Corp. Folding electric bicycle
US20070057482A1 (en) * 2005-09-13 2007-03-15 Yu-Tu Hsu Folding bicycle
US20090152829A1 (en) * 2007-12-14 2009-06-18 Michael Dale Anderson Knee scooter
US8608184B2 (en) * 2009-11-06 2013-12-17 Leonard R. Janis Mobility assistance device
US20120280467A1 (en) * 2010-08-20 2012-11-08 Medline Industries, Inc. Knee walker
US20170165146A1 (en) * 2015-12-15 2017-06-15 Justin Franson Medical knee walker
US20170332748A1 (en) * 2016-05-23 2017-11-23 Medical Depot, Inc. Walking cane clamp and base for use with walkers and rollators

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