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US 4,009,647 AGranted
Clean air zone for surgical purposes
AssigneeHoworth Air Engineering Limited
InventorFrederick Hugh Howorth
Life of this patent
Estimating the term…
Abstract
Apparatus for providing a clean air zone around a patient undergoing surgery in the form of a plurality of air delivery means and air supply means for supplying sterile air to the air delivery means, a first central one of the air delivery means being adapted to supply air at a first velocity and a second outer one of the air supply means being adapted to supply air at a second lower velocity.
Claims2
Apparatus for providing a clean air zone around
- a patient undergoing surgery comprising:
- a plurality of air delivery means,
- a plurality of air supply means for supplying sterile air to the air delivery means,
- a first central one of the air delivery means being adapted to supply air at a first velocity,
- and a second outer one of the air supply means being adapted to supply air at a second velocity lower than the first velocity,
- the different air delivery means having different permeabilities for attaining the desired flow velocity differential.
3 more elements
Apparatus for providing a zone of sterile air around a patient undergoing surgery comprising:
- first and second and third adjacent air delivery means,
- each air delivery means being in the form of a rigid perforated panel having different permeabilities,
- a plurality of air supply means for supplying sterile air to the respective air delivery means,
- the first air delivery means being provided air at a first velocity,
- the second air delivery means being provided air at a second velocity lower than the first velocity,
- the third air delivery means being provided air at a third velocity lower than the second velocity.
3 more elements
Dependencies are inferred from the claim text.