초록 ▼

An adjustable matrix wheelchair seat can be mounted on a pair of rods such as are provided on the seat rails of a typical wheelchair or on any pair of rods adapted to be rigidly fixed to and aligned in a longitudinal direction relative to the frame of the wheelchair. A lateral array of spaced apart

An adjustable matrix wheelchair seat can be mounted on a pair of rods such as are provided on the seat rails of a typical wheelchair or on any pair of rods adapted to be rigidly fixed to and aligned in a longitudinal direction relative to the frame of the wheelchair. A lateral array of spaced apart substantially inelastic straps is extended between and engaged on the rods. A longitudinal array of spaced apart substantially inelastic straps is engaged on the forwardmost and rearwardmost straps of the lateral array. The longitudinal array traverses the lateral array to define a horizontal matrix of ventilating interstices. The length of any or all of the straps of the lateral and horizontal arrays is independently adjustable to permit alteration of the pressure pattern imposed on the arrays by the patient occupying the seat.

대표청구항 ▼

An adjustable matrix wheelchair seat can be mounted on a pair of rods such as are provided on the seat rails of a typical wheelchair or on any pair of rods adapted to be rigidly fixed to and aligned in a longitudinal direction relative to the frame of the wheelchair. A lateral array of spaced apart

An adjustable matrix wheelchair seat can be mounted on a pair of rods such as are provided on the seat rails of a typical wheelchair or on any pair of rods adapted to be rigidly fixed to and aligned in a longitudinal direction relative to the frame of the wheelchair. A lateral array of spaced apart substantially inelastic straps is extended between and engaged on the rods. A longitudinal array of spaced apart substantially inelastic straps is engaged on the forwardmost and rearwardmost straps of the lateral array. The longitudinal array traverses the lateral array to define a horizontal matrix of ventilating interstices. The length of any or all of the straps of the lateral and horizontal arrays is independently adjustable to permit alteration of the pressure pattern imposed on the arrays by the patient occupying the seat. second tank for providing a refill indication. 7. The spraying system of claim 4 including an auxiliary liquid supply tank containing a supply of liquid, said auxiliary tank having a supply line connected to said first tank and a selectively operable control valve for permitting communication of liquid from said auxiliary tank through said supply line to said first tank, said second tank having a second sensor for indicating a second liquid level above said low liquid level, and said control being operable in response to the sensor of said first tank sensing a low liquid level in said first tank and said sensor of the second tank sensing said second liquid level in said second tank for operating said control valve and permitting the supply of liquid from said auxiliary tank to said first tank. 8. The spraying system of claim 7 in which said control is operable for causing a predetermined amount of said liquid to be directed from said auxiliary tank to said first tank. 9. The spraying system of claim 7 in which said first tank includes a second sensor for sensing a predetermined high liquid level, and said control is operable responsive to said second sensor of said first tank sensing said high liquid level for interrupting the supply of liquid to said first tank from said auxiliary tank. 10. The spraying system of claim 4 in which said control is operable upon the sensor of said first tank sensing a low liquid level in said first tank and the sensor of said second tank sensing a liquid level above the low level in said second tank for pressurizing said second tank and depressurizing said first tank. 11. The liquid spraying system of claim 1 in which said spray head has a plurality of spray nozzles arranged in a row, and said first conduit is coupled to said spray head at one end of said row and said second conduit is coupled to said spray head at an opposite end of said row. 12. A liquid spraying system comprising a spray head having at least one spray nozzle for discharging a liquid spray, a liquid supply system for directing pressurized supply liquid to the spray head with a portion of the supply liquid being directed from said spray head as a discharging spray and a portion of the supply liquid exiting the spray head as a return liquid, said liquid supply system including a plurality of selectively pressurizable liquid containable tanks, said tanks each having a respective fluid conduit coupled to said spray head, and said liquid supply system being operable for successively directing pressurized liquid to said spray head from said plurality of tanks without disconnecting the fluid conduits of said tanks from said spray head. 13. The liquid spraying systems of claim 12 in which said liquid supply system is selectively operable for directing pressurized liquid from one of said tanks through the fluid conduit of said one tank to said spray nozzle while said one tank is pressurized and for directing return liquid through the fluid conduit of an other of said tanks while said other of said tanks is depressurized, and said liquid supply system being successively operable for directing pressurized liquid from said other of said tanks through the fluid conduit thereof to said spray head while said other of said tanks is pressurized and for directing return liquid to said one of said tanks through the fluid conduit thereof while said one of said tanks is depressurized. 14. The liquid spray system of claim 13 in which said tanks each have a respective liquid level sensor, and a control responsive to the liquid level sensor of the said one tank sensing a predetermined low level of liquid in the tank and for pressurizing the other tank and depressurizing the one tank. 15. The spraying system of claim 14 including an auxiliary liquid supply tank containing a supply of liquid, said auxiliary tank having a supply line connected to said one tank and a selectively operable control valve for permitting communication of liquid from said aux