Inflatable cushions
First Claim
Patent Images
1. An inflatable lifting cushion comprising:
- (a) plurality of inflatable segments including a first segment superimposed on a second segment, wherein each segment comprises a ring chamber (11) around a central web (12),(b) segments are bonded together at a junction between the ring chambers so that a central chamber (14) is formed between the central webs (12);
(c) all said chambers are pneumatically interconnected and(d) an inlet (30) is attached to the cushion for inflating said chambers in unison.
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Accused Products
Abstract
The inflatable lifting cushion comprises two segments (10) each comprising a ring chamber (11) around a central web (12). The two segments (10) are welded together at a junction (13) to define therebetween a central chamber (14). An air inlet fitting (30) (FIG. 1) is attached to one of the segments (10) for simultaneous inflation of the chambers (11) and (14).
38 Citations
6 Claims
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1. An inflatable lifting cushion comprising:
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(a) plurality of inflatable segments including a first segment superimposed on a second segment, wherein each segment comprises a ring chamber (11) around a central web (12), (b) segments are bonded together at a junction between the ring chambers so that a central chamber (14) is formed between the central webs (12); (c) all said chambers are pneumatically interconnected and (d) an inlet (30) is attached to the cushion for inflating said chambers in unison. - View Dependent Claims (2)
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3. A method of making a lifting cushion comprising:
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superimposing four sheets (15,16,17,18) of an impermeable inelastic, flexible radio-frequency weldable material upon one another with a weld preventing disc composed of weld preventing material, (b) said disc being disposed centrally between the second and third sheets (c) a ring of a weld preventing material disposed between the first and second sheets and another ring of weld preventing material disposed between the third and fourth sheets, and (d) a larger ring of a weld preventing material disposed between the peripheral margins of the second and third sheets, and then (e)bonding said sheets together by radio-frequency welding. - View Dependent Claims (4, 5, 6)
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Specification