Fluent material handling – with receiver or receiver coacting mea – With signal – indicator – recorder – inspection means or exhibitor – Level or pressure in receiver
Patent
1986-12-01
1987-12-08
Bell, Jr., Houston S.
Fluent material handling, with receiver or receiver coacting mea
With signal, indicator, recorder, inspection means or exhibitor
Level or pressure in receiver
141114, 141192, 5453, 5455, 417 5, 417 7, B67C 312
Patent
active
047112751
ABSTRACT:
An air supply and control apparatus for an inflatable mattress 2 has several air compressors 1 which are operated in turn, during normal operation, to inflate the mattress 2. In the case of the pressure in the mattress 2 falling below an upper preset value the air supply is provided by having more than one air compressor 1 operate simultaneously. The apparatus has electronic circuitry for effecting this alteration of the mode of operation when pressure sensing means 4 detects a fall in mattress pressure. In the case of a more severe drop in mattress pressure a valve 16 in an air outlet of the mattress 2 is closed under control of the electronic circuitry. The apparatus is particularly suitable for use with a mattress 2 having a plurality of separately inflatable regions, air being supplied to the regions from the air compressors 1 via a distributor 3.
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patent: 3060858 (1962-10-01), Shoosmith
patent: 4178132 (1979-12-01), Shiraishi et al.
patent: 4259038 (1981-03-01), Jorgensen et al.
patent: 4542547 (1985-09-01), Sato
patent: 4609854 (1986-09-01), Yamamoto et al.
patent: 4617690 (1986-10-01), Grebe
patent: 4631767 (1986-12-01), Carr et al.
patent: 4637083 (1987-01-01), Goodwin
Ford Victoria L.
Morgan Bryan J.
Bell, Jr. Houston S.
Pegasus Airwave Limited
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