Abstract: A wheelchair suspension is provided. The wheelchair suspension includes a frame, a front caster pivot arm, a drive assembly, and a rear caster. The front caster pivot arm is pivotally connected to the frame. The front caster is coupled to a front end of the front caster pivot arm. The drive assembly is pivotally connected to the front caster pivot arm. The drive assembly comprises a drive wheel and a motor that drives the drive wheel. Torquing of the drive wheel by the motor in a forward direction causes the drive assembly to pivot with respect to the front caster pivot arm such that the drive wheel moves forward toward the front caster and a distance between a support surface and the connection between of the drive assembly and the front caster pivot arm increases.

Abstract: A wheelchair suspension is provided. The wheelchair suspension includes a frame, a pivot arm, a front caster, a drive assembly, and a rear caster. The pivot arm is pivotally coupled to the frame. The front caster is coupled to the pivot arm. Movement of the drive assembly in a first direction causes the pivot arm to substantially remain in a first position. Movement of the drive assembly in a second direction urges the pivot arm away from the first position.

Abstract: A home care oxygen system includes an inline compressor that has all the check valves and gas flow passages between cylinders located in the cylinder head. Only a single check valve is used for each cylinder. The crankshaft is built up from a shaft with eccentrics and spacers.

Abstract: A compressor includes a cylinder assembly in a V4 configuration. A crankshaft of the compressor has a main shaft and first and second eccentric bodies. The two eccentric bodies drive four pistons.

Abstract: A manually-powered wheelchair that includes one or more features that enhance the overall maneuverability and stability of the wheelchair, such as centrally mounted drive-wheels and an anti-tip system. Other embodiments may include at least one of an adjustable anti-tip system that may be selectively located to several locations on the frame; a positive stop device attached to either the mounting bracket, frame, or the anti-tip system for limiting movement of the anti-tip system and the frame relative to each other; a resistance device attached to the frame and the anti-tip system for increasing resistance between the frame and the anti-tip system when the user leans backwards in the wheelchair; a wheel lock system engaging at least one of the drive wheels below the wheel's axis of rotation; and a tilt prevention device for selectively preventing any rotation of the wheelchair frame and anti-tip system relative to each other.

Abstract: A wheelchair suspension is provided. The wheelchair suspension includes a frame, a pivot arm, a front caster, a drive assembly, and a rear caster. The pivot arm is pivotally coupled to the frame. The front caster is coupled to the pivot arm. Movement of the drive assembly in a first direction causes the pivot arm to substantially remain in a first position. Movement of the drive assembly in a second direction urges the pivot arm away from the first position.

Abstract: A wheelchair suspension is provided. The wheelchair suspension includes a frame, a pivot arm, a front caster, a drive assembly, and a rear caster. The pivot arm is pivotally coupled to the frame. The front caster is coupled to the pivot arm. Movement of the drive assembly in a first direction causes the pivot arm to substantially remain in a first position. Movement of the drive assembly in a second direction urges the pivot arm away from the first position.

Abstract: A wheelchair includes at least one side frame connected to a front caster assembly, and a cross-brace assembly. The cross-brace assembly includes a cross-brace member; at least one rear caster assembly connected to the cross-brace member; at least one main drive wheel axle tube fitting connected to the cross-brace member; and at least one arm connected to the cross-brace member. The at least one arm is pivotally connected to the at least one side frame through a pivot joint.

Abstract: An adjustable bed includes a universal, or interchangeable, bed end that can be used at either end of the bed and can be connected with an existing motor drive assembly. The bed end may include a gear box having first and second input shafts that are selectively covered by a movable cover. The bed end may include a frame having drain openings for draining water from the bed end when the bed end is washed. The bed end may also include an end cap that is fastened to the frame in a unique manner, and that helps to maintain a panel of the bed end cover in a curved or bowed configuration.

Abstract: The present invention provides 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 the front caster(s) through the rotational movement of the pivot arms. By raising or lowering the front caster(s) in such a manner, curb-like obstacles can be traversed in a low-impact manner.

Abstract: A home care oxygen system includes an inline compressor that has all the check valves and gas flow passages between cylinders located in the cylinder head. Only a single check valve is used for each cylinder. The crankshaft is built up from a shaft with eccentrics and spacers.

Abstract: A method of filling a portable tank with compressed oxygen-enriched gas includes the steps of providing a coupling such that when a portable tank is connected with the coupling oxygen-enriched gas can flow through the coupling into the portable tank; directing oxygen-enriched gas from an oxygen concentrator to a compressor; compressing the oxygen-enriched gas in the compressor; directing compressed oxygen-enriched gas from the compressor to a reservoir; storing the compressed oxygen-enriched gas in the reservoir; and thereafter directing stored oxygen-enriched gas from the reservoir to the coupling to enable filling of a portable tank with compressed oxygen-enriched gas from the reservoir.

Abstract: A wheelchair suspension is provided. The wheelchair suspension includes a frame, a pivot arm, a front caster, a drive assembly, and a rear caster. The pivot arm is pivotally coupled to the frame. The front caster is coupled to the pivot arm. Movement of the drive assembly in a first direction causes the pivot arm to substantially remain in a first position. Movement of the drive assembly in a second direction urges the pivot arm away from the first position.

Abstract: A wheelchair suspension comprises a frame, at least one pivot arm, at least one front caster, at least one rear caster, a stabilizing system, and a sensor. The pivot arm is coupled to the frame. The front caster is coupled to the pivot arm. The rear caster is coupled to the frame. The stabilizing system is coupled to the frame and the pivot arm. The sensor is arranged such that movement of the frame relative to the rear castor causes actuation of the stabilizing system to at least partially resist further movement of the frame.

Abstract: A wheelchair includes at least one side frame connected to a front caster assembly, and a cross-brace assembly. The cross-brace assembly includes a cross-brace member; at least one rear caster assembly connected to the cross-brace member; at least one main drive wheel axle tube fitting connected to the cross-brace member; and at least one arm connected to the cross-brace member. The at least one arm is pivotally connected to the at least one side frame through a pivot joint.

Abstract: A manually-powered wheelchair that includes one or more features that enhance the overall maneuverability and stability of the wheelchair, such as centrally mounted drive-wheels and an anti-tip system. Other embodiments may include at least one of an adjustable anti-tip system that may be selectively located to several locations on the frame; a positive stop device attached to either the mounting bracket, frame, or the anti-tip system for limiting movement of the anti-tip system and the frame relative to each other; a resistance device attached to the frame and the anti-tip system for increasing resistance between the frame and the anti-tip system when the user leans backwards in the wheelchair; a wheel lock system engaging at least one of the drive wheels below the wheel's axis of rotation; and a tilt prevention device for selectively preventing any rotation of the wheelchair frame and anti-tip system relative to each other.

Abstract: An adjustable bed includes a universal, or interchangeable, bed end that can be used at either end of the bed and can be connected with an existing motor drive assembly. The bed end may include a gear box having first and second input shafts that are selectively covered by a movable cover. The bed end may include a frame having drain openings for draining water from the bed end when the bed end is washed. The bed end may also include an end cap that is fastened to the frame in a unique manner, and that helps to maintain a panel of the bed end cover in a curved or bowed configuration.

Abstract: An adjustable bed includes a universal, or interchangeable, bed end that can be used at either end of the bed and can be connected with an existing motor drive assembly. The bed end may include a gear box having first and second input shafts that are selectively covered by a movable cover. The bed end may include a frame having drain openings for draining water from the bed end when the bed end is washed. The bed end may also include an end cap that is fastened to the frame in a unique manner, and that helps to maintain a panel of the bed end cover in a curved or bowed configuration.

Abstract: The present invention provides 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 the front caster(s) through the rotational movement of the pivot arms. By raising or lowering the front caster(s) in such a manner, curb-like obstacles can be traversed in a low-impact manner.

Abstract: An adjustable bed includes a universal, or interchangeable, bed end that can be used at either end of the bed and that can be connected with a motor drive assembly. The bed end may include a manual crank that is removably attached to the bed end. The bed end may include an elevating mechanism that includes a cross-beam or similar structure for transmitting motive force between fixed and movable portions of the bed end. The bed end may also include a new slip nut for transmitting motive force from a lead screw. The bed may further include a reversible corner plate for allowing the bed end to be used facing in either direction. The bed end may also include a plastic cover that is washable and scratch resistant.