Abstract: Reusable parachute ground disconnecting devices provide constant release load percentages within a range of 25 to 70 percent of the load weight for more reliable delatching characteristics on ground contact even in the presence of high ground winds, and with virtually no risk of premature delatching occurring while airborne. Non-linear main springs consisting of stacked disk springs provide ever diminishing deflection to the load suspending assembly as the load size increases, in combination with fixed latch geometry produce constant load release characteristics for the entire capacity rating for a given device. Various time delay means, including an hydraulic dampened load release timer provide added safety and reliability by isolating the delatching system when fluctuations in load weight occur during initial deployment. Disclosed concepts are readily adaptable to high capacity devices for loads of up to 30 tons, and even more.

Abstract: This invention relates to a portable air support device having a plurality of air inflatable cells, arranged within a conveniently dissembled air support bag. The portable device comprises a novel air distribution manifold, control console and air distribution valve assembly to inflate a novel air flow quilt which provides an upward flow of air to a patient reclining thereon, to provide comfort and promote patient healing.

Abstract: This invention relates to a fluid distribution valve comprising a port select valve structure wherein the flow of fluid from a fluid flow source is directed through a chamber of a rotatable member comprising a plurality of varying sized spaced ports which align with ports of a housing at various positions of rotation of the member to provide variations of fluid flow through the ports of the housing. The valve has particular utility as an air distribution valve in an air flow support mattress system.

Abstract: A process for etching a glass surface employing a mask film comprising a porous support layer having a resist area impervious to a glass etchant composition and non-resist areas pervious to the glass etching composition. The glass surface to be etched is cleaned and wetted with a basic aqueous solution. The backside of the mask is applied to the wetted glass surface and squeeged thereon to form a film of the basic aqueous solution to detachably secure the mask to the glass surface. The glass etchant composition is applied to the face of the mask to cover all the non-resist areas to etch the underlying glass. After the glass has been etched to the desired degree, the mask together with substantially all of the glass etchant composition is removed from the glass surface. The surface of the glass is then washed with the aqueous basic solution to remove any residual glass etchant composition.