Buoys – rafts – and aquatic devices – Rafts – Inflatable
Patent
1996-09-05
1999-07-13
Basinger, Sherman
Buoys, rafts, and aquatic devices
Rafts
Inflatable
441 96, B63C 918
Patent
active
059218320
ABSTRACT:
A valve controls the flow of an inflation substance such as carbon dioxide from a pressurized container when the valve is actuated. The valve comprises a valve body having an inflow bore, inlet conduit, chamber, interior chamber and interior passage connected to each other and with the pressurized container. The valve is connected to an inflatable apparatus such as an emergency slide or raft by an outlet conduit connected to the valve body and with the interior passage. The valve is closed by a piston assembly which is balanced. The piston assembly includes a guidance collar and a first piston rod connected to the guidance collar. The first piston rod has an O-ring seal, and the piston rod is attached to the valve body by a fitting. The second end of the piston rod extends through the piston fitting and has a valve actuation receiving means. A "second piston" module attached to the guidance collar has a second piston rod whose diameter is greater than the first piston rod's diameter, a bar, another O-ring seal, and a back-up ring. To close the valve the "second piston" module is slidably retained in the interior passage such that the O-ring seal closes interior passage. The force required to actuate the valve is determined by the diameters of the two piston rods. Axial movement of the first piston actuates the valve, the pressure from the pressurized container removing the "second piston" module from the interior passage, keeping the valve in the open position and allowing rapid inflation of the inflatable apparatus with the guidance collar forced against the piston fitting. The valve can be biased towards the open direction by reversing the diameters of the two piston rods.
REFERENCES:
patent: 2564686 (1951-08-01), Gray
patent: 3072289 (1963-01-01), Stopp
patent: 3150388 (1964-09-01), Oliphant
patent: 3563508 (1971-02-01), DeLorenzo
patent: 4549870 (1985-10-01), Wass
patent: 4624441 (1986-11-01), Kreitchman et al.
Basinger Sherman
General Pneumatics Corporation
Novick Mitchell P.
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