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US 2013/0198964 A1Published application
Pneumatic lift with unidirectional valve
AssigneeWoodlark Circle, Inc.
InventorsDavid T. Davis, Edward A. Gilchrest, JR., Matthew L. Prancuk
Life of this patent
Estimating the term…
Abstract
A pneumatic lift including inflatable mattresses stacked one atop another and arranged in air flow communication with one another, but with each being independently deflatable.
Claims17
A unidirectional valve arranged in air flow communication between each of a first inflatable mattress and a second inflatable, said unidirectional valve comprising:
- a first housing configured to be sealingly located in a panel of a first inflatable mattress, said first housing having at least one opening in air flow communication with an interior of said first inflatable mattress and a conduit communicating between an interior portion of said first housing and an external ambient environment;
- a second housing configured to be sealingly located in a panel of a second inflatable mattress so as to be in mating relationship with said first housing, said second housing having at least one opening communicating with an interior of said second inflatable mattress;
- and
- a resilient diaphragm captured by said first housing so as to isolate said conduit from said interiors of said inflatable mattresses thereby maintaining said interior portion of said first housing at an ambient external pressure during inflation and deflation of said first and second inflatable mattresses.
1 more element
10-15. (canceled)
A unidirectional valve comprising:
- a first housing configured to be sealingly located in a wall of a first inflatable object, said first housing having at least one opening in air flow communication with an interior of said first inflatable object and a conduit communicating between an interior portion of said first housing and an external ambient environment;
- a second housing configured to be sealingly located in a wall of a second inflatable object so as to be in mating relationship with said first housing, said second housing having at least one opening communicating with an interior of said second inflatable object;
- and
- a resilient diaphragm captured by said first housing so as to isolate said conduit from said interiors of said inflatable objects thereby maintaining said interior portion of said first housing at an ambient external pressure during inflation and deflation of said first and second inflatable objects.
1 more element
Dependencies are inferred from the claim text.