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US 4,538,854 AGranted
Elevator chair
AssigneeMorette's Limited
InventorRoss E. Wilson
Life of this patent
Estimating the term…
Abstract
There is provided a chair having a seat portion and an inflatable member under the seat portion. Enveloped by the inflatable member is means for bringing outside air into the inflatable member to inflate it and thus raise the seat portion. In a preferred form, an electrically powered vacuum device would be located within a bag constituting the inflatable member, and thus the bag itself would contribute to muffling the sound of the electrically powered vacuum device.
Claims9
A chair comprising:
- a seat portion mounted to be movable between a lower position and a higher position,
- upright guide means for guiding the movement of the seat portion,
- an inflatable bag under the seat portion adapted, during inflation, to raise the seat portion toward said higher position,
- and a vacuum-producing motorized device within and enclosed by the bag for drawing air into the bag along a conduit which passes to the exterior of the bag, thereby to inflate the bag and raise the seat portion, whereby noise from the motorized device is muted by the presence of the surrounding bag, and whereby to efficiently use the space under the seat portion for both the bag and the motorized device.
1 more element
Dependencies are inferred from the claim text.