Source: https://patents.google.com/patent/US8925943B2/en
Timestamp: 2019-09-21 08:19:25
Document Index: 638456712

Matched Legal Cases: ['Application No. 03779341', 'Application No. 02775917', 'Application No. 03779341', 'Application No. 08729225', 'Application No. 02775917', 'Application No. 10167583', 'Application No. 10167584', 'Application No. 11184946', 'Application No. 599', 'Application No. 2010235847', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 11184946', 'Application No. 08010025', 'Application No. 08729225', 'Application No. 01983183', 'Application No. 02775917', 'Application No. 11161221', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2']

US8925943B2 - Wheelchair suspension - Google Patents
US8925943B2
US8925943B2 US13/465,268 US201213465268A US8925943B2 US 8925943 B2 US8925943 B2 US 8925943B2 US 201213465268 A US201213465268 A US 201213465268A US 8925943 B2 US8925943 B2 US 8925943B2
US13/465,268
US20120217713A1 (en
2008-12-09 Priority to US12/330,554 priority patent/US8172015B2/en
2012-05-07 Priority to US13/465,268 priority patent/US8925943B2/en
2012-05-07 Application filed by Invacare Corp filed Critical Invacare Corp
2012-06-26 Assigned to INVACARE CORP. reassignment INVACARE CORP. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MOLNAR, JAMES H.
2012-08-30 Publication of US20120217713A1 publication Critical patent/US20120217713A1/en
2015-01-06 Publication of US8925943B2 publication Critical patent/US8925943B2/en
A wheelchair includes a frame, a rear caster coupled to the frame, a drive wheel coupled to the frame, a front caster, and a pivoting assembly. The pivoting assembly couples the front caster to the frame such that upward movement of the front caster relative to the frame causes the front caster to move toward the drive wheel.
This application is a continuation of U.S. patent application Ser. No. 12/330,554, filed Dec. 9, 2008, now U.S. Pat. No. 8,172,015, issued May 8, 2012, titled “Wheelchair Suspension”, which is a continuation of U.S. patent application Ser. No. 11/429,687, filed May 8, 2006, now U.S. Pat. No. 7,472,767, issued Jan. 6, 2009, which is a continuation of U.S. patent application Ser. No. 10/762,977, filed Jan. 22, 2004, now U.S. Pat. No. 7,055,634, issued Jun. 6, 2006, which is a continuation of U.S. patent application Ser. No. 09/974,348, filed Oct. 10, 2001, now U.S. Pat. No. 7,040,429, issued May 9, 2006, the disclosures of which are fully incorporated by reference herein in their entirety.
The present invention relates to a wheelchair. The wheelchair includes a frame, a rear caster coupled to the frame, a drive wheel coupled to the frame, a front caster, and a pivoting assembly. The pivoting assembly couples the front caster to the frame such that upward movement of the front caster relative to the frame causes the front caster to move toward the drive wheel.
a drive assembly coupled to the frame;
a pivoting assembly mounting a front caster to the frame, the pivoting assembly comprising:
a front caster assembly having a head tube rotatably receiving a caster fork that rotatably supports a caster wheel;
an upper link pivotally mounted to the front caster assembly at a first upper pivot axis and to the frame at a second upper pivot axis;
a lower link pivotally mounted to the front caster assembly at a first lower pivot axis and to the frame at a second lower pivot axis;
wherein the distance between the first upper pivot axis and the second upper pivot axis is different than the distance between the first lower pivot axis and the second lower pivot axis;
wherein the second lower pivot axis and the second upper pivot axis are substantially offset on the frame such that when the wheelchair suspension is on a level support surface a horizontal distance between the second lower pivot axis and the second upper pivot axis is greater than one-half a vertical distance between the second lower pivot axis and the second upper pivot axis.
2. The wheelchair suspension of claim 1 wherein the distance between the first upper pivot axis and the second upper pivot axis is greater than the distance between the first lower pivot axis and the second lower pivot axis.
3. The wheelchair suspension of claim 1 wherein the drive assembly is coupled to the pivoting assembly.
4. The wheelchair suspension of claim 1 wherein upward pivotal movement of the first and second pivot linkages causes the caster wheel to move toward the frame.
5. The wheelchair suspension of claim 1 further comprising a spring attached to each suspension assembly, such that the spring biases the front caster wheel into engagement with the ground.
6. A wheelchair suspension comprising:
a pivoting assembly that couples the front caster assembly to the frame at pivot axes such that upward movement of the front caster head tube relative to the frame causes the front caster wheel to move laterally toward the frame; and
wherein a drive axle of the drive wheel is below said pivot axes when the wheelchair is disposed on a level support surface.
7. The wheelchair suspension of claim 6 further comprising a spring coupled to the pivoting assembly such that the front caster wheel is biased into engagement with the ground.
8. The wheelchair suspension of claim 6 wherein the pivoting assembly comprises first and second pivot linkages pivotally coupled to the frame and the front caster assembly.
9. The wheelchair suspension of claim 6 wherein the drive wheel is coupled to the pivoting assembly.
10. A wheelchair suspension comprising:
a front caster assembly having a head tube rotatably receiving a caster fork that rotatably supports a caster wheel; and
a pivoting means that couples the front caster assembly to the frame at a first pivot axis and a second pivot axis such that upward movement of the front caster assembly relative to the frame causes the front caster wheel to move toward the frame;
wherein the first pivot axis and the second pivot axis are substantially offset on the frame such that when the wheelchair suspension is on a level support surface a horizontal distance between the first pivot axis and the second pivot axis is greater than one-half a vertical distance between the first pivot axis and the second pivot axis.
11. The wheelchair suspension of claim 10 wherein the drive wheel is coupled to the pivoting assembly.
12. The wheelchair suspension of claim 10 further comprising a spring coupled to the pivoting assembly such that the front caster wheel is biased into engagement with the ground.
an upper linkage pivotally mounted to the front caster assembly and to the frame at respective upper pivot axes;
a lower linkage pivotally mounted to the front caster assembly and to the frame at respective lower pivot axes;
wherein the distance between the upper pivot axes is different than the distance between the lower pivot axes, such that upward movement of the front caster head tube relative to the frame causes the front caster wheel to move laterally toward the frame; and
wherein a drive axle of the drive wheel is below the lower pivot axes when the wheelchair is disposed on a level support surface.
14. The wheelchair suspension of claim 13 wherein the drive wheel is coupled to the pivoting assembly.
15. The wheelchair suspension of claim 13, wherein the distance between the upper pivot axes is greater than the distance between the lower pivot axes.
16. The wheelchair suspension of claim 13 further comprising a spring attached to the pivoting assembly such that the spring biases the front caster wheel into engagement with the ground.
at least one rear caster coupled to the frame member;
a first linkage pivotally coupled to the frame member at an upper pivot axis, wherein the upper pivot axis is disposed between a forward portion and a rearward portion of the first linkage; and
a second linkage pivotally coupled to the frame member; and
a third linkage pivotally coupled to the forward portion of the first linkage and to the second linkage, wherein a front caster is connected to the third linkage;
wherein the drive assembly is fixedly attached to the rearward portion of the first linkage; and
wherein upward pivotal movement of the first and second linkages causes the third linkage to undergo upward movement and lateral movement toward the drive assembly.
18. The wheelchair of claim 17 wherein the first linkage comprises a first length and the second linkage comprises a second length and wherein the first and second lengths are different.
19. A wheelchair suspension comprising:
a frame member having first and second sides;
a first drive assembly coupled to said first side;
a second drive assembly coupled to said second side;
a first pivoting assembly coupled to said first side at a first pair of pivot axes;
a second pivoting assembly coupled to said second side at a second pair of pivot axes;
a front caster assembly coupled to each of the first and second pivoting assemblies,
wherein each front caster assembly has a head tube rotatably receiving a caster fork that rotatably supports a caster wheel;
wherein each of the first and second pivoting assemblies are configured such that upward movement of the front caster assembly relative to the frame causes the front caster wheel to move laterally toward the drive assembly;
wherein a drive axle of a drive wheel of the first drive assembly is below said first pair of pivot axes when the wheelchair is disposed on a level support surface; and
wherein a drive axle of a drive wheel of the second drive assembly is below said second pair of pivot axes when the wheelchair is disposed on a level support surface.
20. The wheelchair suspension of claim 19 wherein the first and second drive assemblies are respectively coupled to the first and second pivoting assemblies.
US13/465,268 2001-10-10 2012-05-07 Wheelchair suspension Active US8925943B2 (en)
US14/585,393 Continuation US9370455B2 (en) 2001-10-10 2014-12-30 Wheelchair suspension
US20120217713A1 US20120217713A1 (en) 2012-08-30
US8925943B2 true US8925943B2 (en) 2015-01-06
CA (3) CA2821496C (en)
AT504461T (en) 2002-08-16 2011-04-15 Invacare Corp Vehicle antitipper / locking-mechanism
JP2007532157A (en) * 2004-04-08 2007-11-15 レボ・アーゲー，ヴォーレン Intermediate wheel drive wheelchair, especially the lifting wheelchair
TWI255177B (en) * 2005-03-10 2006-05-21 Kwang Yang Motor Co Chassis mechanism of electric wheelchair
US7766106B2 (en) * 2005-07-14 2010-08-03 Pride Mobility Products Corporation Powered wheelchair configurations and related methods of use
CN102499827B (en) 2007-02-08 2015-11-25 英瓦卡尔公司 Wheelchair suspension
BRPI0919904A2 (en) * 2008-10-23 2016-02-16 Webb Int Co Jerwis B workpiece transport assembly work, and method for transforming a workpiece
WO2016006248A1 (en) * 2014-07-11 2016-01-14 国立大学法人東京大学 Travel device
TWI580415B (en) * 2014-08-20 2017-05-01 Energy Control Ltd Front suspension system for an electric wheelchair
US4245847A (en) * 1979-05-24 1981-01-20 Christopher Knott Wheelchair
US5351744A (en) 1990-06-19 1994-10-04 Tour & Andersson Ab Device in a press casting machine and method of using such device
USD397465S (en) 1996-07-01 1998-08-25 Toilet light
WO2002034190A2 (en) 2000-10-27 2002-05-02 Invacare Corporation Obstacle traversing wheelchair
US6494474B1 (en) * 1999-11-01 2002-12-17 Burke Mobility Products, Inc. Adjustable wheelchair anti-tip assembly
DE10136369C2 (en) 2001-07-26 2003-05-28 Alber Ulrich Gmbh & Co Kg Minicar, especially wheelchair
FR2858764B1 (en) 2003-08-13 2006-04-28 Pi Hsiang Machinery Mfg Co Suspension structure for wheelchair
US8118321B2 (en) 2007-08-24 2012-02-21 Levo Wohlen Vehicle with central wheel drive, in particular a wheelchair or stand-up wheelchair
US8177257B2 (en) 2007-05-08 2012-05-15 Eric Dugas Wheelchair base
US6712369B2 (en) * 2002-02-28 2004-03-30 Pihsiang Machinery Mfg. Co., Ltd. Anti-turnover mechanism of electrical wheelchair
US7360792B2 (en) * 2004-10-20 2008-04-22 Pride Mobility Products Corporation Power wheelchair
USD397645S (en) * 1996-07-03 1998-09-01 Pride Health Care, Inc. Motorized wheelchair
DE10136368C2 (en) 2001-07-26 2003-05-28 Alber Ulrich Gmbh & Co Kg Minicar, especially wheelchair
"Bike" magazine article, "Ten Underrated Products You Probably Don't Own but Maybe Should" (in part), Jan. 1994, pp. 82 and 83.
"Bounder Plus Power Wheelchair: Convention "Tubular" Style Frame"; http://www.wheelchairs.com/plus.htm, Accessed on the World Wide Web on Dec. 17, 2003, p. 1-4.
"Bruno Independent Living Aids ISP 9001 Certified"; http://www.bruno.com/power—chairs.htm, Accessed on the World Wide Web on Dec. 17, 2003, p. 1-5.
"Frog Legs Tires", http://mdtap.org/tt/1999.09/prod.html, Accessed on the World Wide Web on Dec. 17, 2003, p. 1-3.
"Frog Legs: Smooth Ride Ahead"; http://www.froglegsinc.com/index.php, Accessed on the World Wide Web on Dec. 17, 2003, p. 105.
"Invacare pronto M71 jr. Power Wheelchair Manual"; Accessed on the World Wide Web on Dec. 17, 2003.
"Mountain Bike Action", picture and caption describing "Body Shock", Jan. 1995, pp. cover and 48.
"Top End Terminator SS Sports Wheelchair", http://phc-online.com/terminator—ss.htm, Accessed on the World Wide Web on Dec. 17, 2003, p. 1-5.
"Transactions of the Institute of Measurement and Control", The British Library of Science Technology and Business, vol. 24, Nov. 5, 2002, 15 pgs.
10 photographs (8.5×11) of Quickie G-424 Wheelchair obtained Nov. 24, 2004.
Advisory Action from U.S. Appl. No. 09/974,348 dated Feb. 27, 2004.
Amendment in U.S. Appl. No. 12/524,476 dated Nov. 20, 2013.
Communication forwarding Supplemental EP Search report from Application No. 03779341.1 dated May 4, 2009.
Communication from EP Application No. 02775917.4 dated Oct. 25, 2012.
Communication from EP Application No. 03779341.1 dated Oct. 5, 2009.
Communication from EP Application No. 08729225.6 dated Mar. 1, 2010.
Communication from European Application No. 02775917.4 dated May 2, 2011.
Complaint for Patent Infringement Demand for Jury Trial, Case No. 1:06CV0517.
European Search Report from EP Application No. 10167583.3 dated May 31, 2012.
European Search Report from EP Application No. 10167584.1 dated Aug. 8, 2012.
European Search Report from EP Application No. 11184946.9 dated Jul. 5, 2012.
Examination Report for NZ Application No. 599,108 dated Nov. 30, 2012.
Examiner's First Report for AU Appl. No. 2008214045 dated Jun. 22, 2010.
Final Office Action in U.S. Appl. No. 12/524,476 dated Feb. 27, 2014.
First Examination Report from AU Appli. No. 2010303354 dated Sep. 21, 2012.
First Examination Report from AU Application No. 2010235847 dated Nov. 22, 2012.
First Office Action in Canadian Application No. 2,793,015 dated Nov. 23, 2012.
First Office Action in U.S. Appl. No. 13/566,473 dated Dec. 6, 2012.
Further Office Action from Canadian Application No. 2,676,724 dated Sep. 18, 2012.
Golden Technologies advertisement video http://youtu.be/TyEvrmoaHME.
International Preliminary Examination Report from PCT/US02/29998 dated Jan. 13, 2004.
International Preliminary Examination Written Opinion from PCT/US02/29998 dated May 20, 2003.
International Preliminary Examining Authority Written Opinion from PCT/US03/34124 dated Mar. 8, 2006.
International Search Report and Written Opinion for PCT/US13/026441 dated Apr. 23, 2013.
International Search Report and Written Opinion from PCT/US10/51888 dated Dec. 6, 2010.
Kauzlarich, J. et al., "Wheelchair Caster Shimmy II: Damping", Journal for Rehabilitative Research and Development, May/Jun. 2000, vol. 37, No. 3, pp. 305-314.
M.J. Lawn, et al., "Modeling of a Stair-Climbing Wheelchair Mechanism with High Single-Step Capability", IEEE Transactions on Neutral Systems and Rehabilitation Engineering, V.
McLauren, C., "Future Developments—Current Directions in Wheelchair Research", Journal for Rehabilitative Research and Development, Jul./Aug. 1985, vol. 42, No. 4 Suppl. No. 2, pp. 88-99.
Notice of Allowability from U.S. Appl. No. 10/044,826 dated Jun. 14, 2005.
Notice of Allowance for U.S. Appl. No. 13/465,404 dated Sep. 27, 2013.
Notice of Allowance from U.S. Appl. No. 11/472,509 dated Jul. 19, 2013.
Notice of Allowance from U.S. Appl. No. 11/472,509 dated Oct. 19, 2012.
Notice of Allowance from U.S. Appl. No. 12/118,099 dated Jul. 3, 2013.
Notice of Allowance from U.S. Appl. No. 12/330,554 dated Feb. 14, 2012.
Notice of Allowance from U.S. Appl. No. 12/330,554 dated Nov. 15, 2011.
Notice of Allowance from U.S. Appl. No. 12/330,554 dated Sep. 23, 2011.
Notice of Allowance from U.S. Appl. No. 12/522,837 dated Jun. 28, 2012.
Notice of Allowance from U.S. Appl. No. 12/523,630 dated Jun. 11, 2012.
Notice of Allowance from U.S. Appl. No. 13/413,839 dated May 1, 2014.
Notice of Allowance in U.S. Appl. No. 13/465,404 dated Sep. 27, 2013.
Notice of Allowance in U.S. Appl. No. 13/568,623 dated Oct. 9, 2013.
Notice of Allowance U.S. Appl. No. 13/568,623 dated Apr. 2, 2014.
Notice of Appeal and Pre-Appeal Brief Request and Statement from U.S. Appl. No. 11/472,509 filed Mar. 2, 2011.
Nterview Summary from U.S. Appl. No. 11/472,509, filed Mar. 2, 2011.
Office Action for U.S. Appl. No. 13/413,839 dated Sep. 26, 2013.
Office Action from Canadian Application No. 2,676,423 dated Aug. 6, 2012.
Office action from Canadian Application No. 2,676,724 dated Feb. 2, 2012.
Office Action from Canadian Application No. 2,690,500 dated Jun. 15, 2012.
Office action from EP Application No. 11184946.9 dated Aug. 13, 2012.
Office action from U.S. Appl. No. 08/228,584 dated Apr. 14, 1995.
Office action from U.S. Appl. No. 08/694,484 dated Dec. 2, 1996.
Office action from U.S. Appl. No. 09/974,348 dated Feb. 27, 2003.
Office action from U.S. Appl. No. 09/974,348 dated Oct. 22, 2003.
Office action from U.S. Appl. No. 10/762,977 dated Aug. 11, 2005.
Office action from U.S. Appl. No. 10/762,977 dated Jan. 18, 2005.
Office Action from U.S. Appl. No. 12/330,554 dated Apr. 11, 2011.
Office action from U.S. Appl. No. 12/524,476 dated May 22, 2013.
Office Action from U.S. Appl. No. 13/413,839 dated Sep. 26, 2013.
Office Action in U.S. Appl. No. 12/900,548 dated Jun. 2, 2014.
Office Action in U.S. Appl. No. 12/900,548 dated Sep. 9, 2013.
Office Action in U.S. Appl. No. 13/465,404 dated Apr. 11, 2013.
Office Action in U.S. Appl. No. 13/568,623 dated Feb. 1, 2013.
Office action mailed Mar. 28, 2006 from U.S. Appl. No. 11/145,477.
Pre-Brief Appeal Conference Decision from U.S. Appl. No. 11/472,509 dated Mar. 23, 2011.
Reply Brief from Control No. 90/007,491 dated Nov. 21, 2007.
Response from U.S. Appl. No. 09/974,348 dated Apr. 16, 2004.
Response from U.S. Appl. No. 09/974,348 dated Jan. 26, 2004.
Response from U.S. Appl. No. 09/974,348 dated Jul. 28, 2003.
Response from U.S. Appl. No. 10/762,977 dated May 18, 2005.
Response from U.S. Appl. No. 10/762,977 dated Oct. 3, 2005.
Response from U.S. Appl. No. 11/429,687 dated Jun. 17, 2008.
Response from U.S. Appl. No. 12/523,630 dated Mar. 15, 2012.
Response in U.S. Appl. No. 13/566,473 dated Apr. 8, 2013.
Response to Communication from EP Application No. 08010025.8 dated Feb. 6, 2012.
Response to Communication from EP Application No. 08729225.6 dated Jun. 21, 2010.
Response to Communication from European Application No. 01983183.3 dated Sep. 19, 2009.
Response to Communication from European Application No. 02775917.4 dated Sep. 6, 2011.
Response to EP Communication from European Application No. 11161221.4 dated Mar. 13, 2012.
Response to Office Action from Canadian Application No. 2,495,751 dated Feb. 23, 2012.
Response to Office Action from Canadian Application No. 2,676,423 dated Jun. 7, 2012.
Response to Office Action from Canadian Application No. 2,676,423 dated Nov. 7, 2011.
Response to Office Action from Canadian Application No. 2,676,424 dated Jun. 28, 2012.
Response to Office Action from Canadian Application No. 2,690,500 dated Apr. 3, 2012.
Response to Office Action from Canadian Application No. 2,700,672 dated Nov. 18, 2011.
Response to Office Action from U.S. Appl. No. 12/330,554 dated Jul. 11, 2011.
Response to Office Action from U.S. Appl. No. 13/413,839 dated Feb. 26, 2014.
Response to Office Action in EP 118946.9 dated Sep. 11, 2013.
Response to Office Action in U.S. Appl. No. 12/900,548 dated Jan. 28, 2014.
Response to Office Action in U.S. Appl. No. 13/465,404 dated Jul. 11, 2013.
Response to Office Action in U.S. Appl. No. 13/568,623 dated Jun. 19, 2013.
Response to Restriction Requirement in U.S. Appl. No. 12/900,548 dated Jul. 29, 2013.
Response to Restriction Requirement in U.S. Appl. No. 13/465,404 dated Feb. 4, 2013.
Restriction Requirement in U.S. Appl. No. 12/900,548 dated Jun. 28, 2013.
Restriction Requirement in U.S. Appl. No. 13/465,404 dated Jan. 3, 2013.
Sunrise Medical, Inc., Power Products Parts Manual, 930307 Rev. K (264 double sided sheets), Jul. 2004. (Note: various dates are alleged therein based on wheelchair products listed including the Quickie G-424).
Supplemental Notice of Allowance dated Mar. 30, 2005 from U.S. Appl. No. 10/390,133.
U.S. Patent Office action dated Jul. 25, 2006 from U.S. Appl. No. 11/209,001.
US20060213705A1 (en) 2006-09-28
AU736690B2 (en) 2001-08-02 A constant center of gravity tiltable chair of a wheelchair
NL193529C (en) 2000-01-04 Conversion Baar vehicle for personal use.
US7896394B2 (en) 2011-03-01 Midwheel drive wheelchair with independent front and rear suspension
AU738288B2 (en) 2001-09-13 Wheelchair suspension system
US9364377B2 (en) 2016-06-14 Suspension for wheeled vehicles
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:MOLNAR, JAMES H.;REEL/FRAME:028446/0368