1
Theodore D Wakefield II: Method and apparatus for remote maintenance, troubleshooting, and repair of a motorized wheelchair. Invacare Corporation, Laura F Shunk, Hudak & Shunk Co A, October 5, 1999: US05961561 (209 worldwide citation)

A method and apparatus for the remote maintenance, troubleshooting, and/or repair of electric or motorized wheelchairs is disclosed. A wheelchair diagnostic system includes a data communications network, a motorized wheelchair having a controller associated therewith, a modem coupled between the con ...


2
Walter G Lockard, Herbert J Hoekstra, Allen J Boris, Douglas M Nickles: Length and width adjustable wheelchair. Invacare Corporation, Fay Sharpe Beall Fagan Minnich & McKee, February 5, 1991: US04989890 (88 worldwide citation)

Wheelchair side frames (A) include forward and rearward side frame portions (10, 12) which are telescopically interconnected such that the length of the side frames is selectively adjustable. A cross brace folding assembly (B) interconnects the side frames and selectively moves the side frames betwe ...


3
Roland A Mentessi, Allen J Boris, Neal J Curran: Attended to self propelled convertible pivoting wheelchair. Invacare Corporation, Fay Sharpe Beall Fagan Minnich & McKee, March 15, 1994: US05294141 (88 worldwide citation)

A convertible wheelchair permits change over from an attended wheelchair arrangement to a self propelled wheelchair arrangement. The wheelchair accommodates both lateral and longitudinal dimensional changes. Further, the seat can pivot relative to the frame, as well as permitting a seat back to tilt ...


4
Dale A Pulver: Adjustable front wheel stabilizer for power wheelchair. Invacare Corporation, Hudak & Shunk Co A, December 15, 1998: US05848658 (87 worldwide citation)

A mid-wheel drive or front wheel drive power wheelchair includes a front stabilizer extending from the frame. It includes a first arm pivotally mounted to the frame at a first or upper end and a stabilizer wheel is mounted adjacent a second end. A second arm of the stabilizer assembly is pivotally c ...


5
Joseph B Richey II, Gerold G Goertzen: Apparatus and method for forming oxygen-enriched gas and compression thereof for high-pressure mobile storage utilization. Invacare Corporation, Hudak & Shunk Co, November 23, 1999: US05988165 (85 worldwide citation)

An oxygen concentrator is utilized in combination with a compressor to provide a highly enriched and compressed oxygen gas in a mobile container such as a gas cylinder. The combination and method of production provides for the facile preparation of an enriched source of oxygen for use by an ambulato ...


6
Gregory A Michaels, Homayoun Birangi: Gas concentration sensor and control for oxygen concentrator utilizing gas concentration sensor. Invacare Corporation, Hudak & Shunk Co A, June 29, 1999: US05917135 (84 worldwide citation)

An acoustic oxygen sensor is provided which can be used in the output lines leading from the sieve beds. This sensor can be used in communication with a microprocessor to control the production and evacuation cycles of the sieve beds, i.e., for example to determine the period for which a bed is supp ...


7
Gilbert E Haury, Nathalal G Patel, Walter G Lockard, Thomas R Wiatrak: Sports wheelchair. Invacare Corporation, Fay & Sharpe, February 19, 1985: US04500102 (84 worldwide citation)

The sports wheelchair includes a one-piece, welded tubular frame assembly (A). A pair of rear wheels (30) are horizontally and adjustably positionable in a rear wheel mounting plate (34). The mounting plate has a plurality of slots (36, 38, 40) and a plurality of alternating ridges (44) and valleys ...


8
Stephen L Kral: Mid-wheel drive wheelchair with front wheel multiple bias suspension and anti-tip assembly. Invacare Corporation, Hudak & Shunk Co A, October 8, 2002: US06460641 (83 worldwide citation)

A wheelchair has a plurality of central wheels which can be either power or manually driven, at least one rear caster wheel, and at least one resiliently biased ground engaging front wheel having a multiple suspension assembly. The wheelchair has improved tracking since the front wheel is maintained ...


9
James H Molnar: Wheelchair suspension. Invacare Corporation, Calfee Halter & Griswold, May 9, 2006: US07040429 (79 worldwide citation)

A wheelchair suspension having plurality of pivoting linkages to lift and retract a front castor assembly to facilitate traversing an obstacle or rough terrain. In this regard, a wheelchair suspension having a frame member and at least one a pivoting assembly is provided. The pivoting assembly has, ...


10
Gerold Goertzen, William A Null Jr: Obstacle traversing wheelchair. Invacare Corporation, Nenad Pejic, Calfee Halter & Griswold, April 29, 2003: US06554086 (78 worldwide citation)

A curb-climbing wheelchair having pivotal arm assemblies. The pivotal arm assemblies include at least one front caster and have the ability to rotate or pivot. The pivot arms rotate or pivot in response to moments generated by accelerating or decelerating the wheelchair thereby raising or lowering t ...