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US 5,071,409 AGranted
Vacuum device particularly useful for draining wounds
OwnerLior Rosenberginventor
Life of this patent
Estimating the term…
Abstract
A vaccum device includes a cylinder, a plunger receivable through the open end of the cylinder and having a piston movable within the cylinder to define a suction chamber; and indicia carried by the cylinder cooperable with a reference on the plunger for providing a visual indication of the suction in the suction chamber. The indicia is in the form of a curve representing the variation of pressure in the suction chamber with the volume of the chamber as indicated by a reference on the piston.
Claims17
A vacuum device connectible to a suction line for applying suction to an object, comprising:
- a cylinder open at one end and closed at its opposite end by an end wall formed with a passageway therethrough;
- a plunger receivable through the open end of the cylinder and having a piston movable within the cylinder towards and away from said end wall to define therewith a suction chamber communicating with said passageway;
- a spring urging said plunger and its piston away from said end wall to expand said chamber and thereby to produce a negative pressure therein;
- a valve operable to selectively apply suction from said suction chamber to said suction line when connected to said vacuum device;
- and indicia carried by said cylinder cooperable with a reference on said plunger for providing a visual indication of the suction applied by said suction chamber to the suction line.
2 more elements
Dependencies are inferred from the claim text.