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US 4,984,564 AGranted
Surgical retractor device
OwnerFrank Yueninventor
Life of this patent
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Abstract
The present invention relates to a surgical retractor which comprises an inflatable sleeve that may be deflated, when not in use, so as to assume a precoiled position; and which may be inflated by air pressure, when in use, so as to define an uncoiled generally circular aperture.
Claims12
A surgical retractor device comprising an inflatable sleeve that is deflated, when not in use, so as to assume a precoiled position;
- and is inflated by air pressure, when in use, so as to assume an uncoiled state in which it defines a generally circular aperture.
A surgical retractor device comprising:
- a precoiled inflatable sleeve having a stationary end and a movable end;
- a fluid inflow nozzle at said stationary end;
- a fluid outflow nozzle at said movable end;
- such that whenever a pressurized fluid is injected into said precoiled sleeve through said inflow nozzle, the movable end uncoils until the retractor device defines a generally circular aperture;
- and
- such that whenever said pressurized fluid is withdrawn from said uncoiled retractor device through said outflow nozzle, the movable end recoils until the retractor device becomes a precoiled sleeve.
3 more elements
A surgical retractor device comprising an inflatable sleeve that is deflated, when not in use, so as to assume a precoiled position;
- and is inflated by air pressure, when in use, so as to assume an uncoiled state in which it defines a generally circular aperture;
- one fluid inflow and outflow means for inflating and deflating said sleeve, respectively;
- and
- said device having two ends, both of which are movable to uncoil as the sleeve is inflated, and to recoil as the sleeve is deflated.
1 more element
Dependencies are inferred from the claim text.