Aspiration device
First Claim
1. An aspirating device comprising:
- a barrel member having an internal wall and defining a nozzle portion and an open end portion;
a piston member having a first and second head portion receivable in said barrel member;
a first sealing element carried by said first piston head portion at one end engageable with said internal wall;
a second sealing element carried by said second piston head portion and disposed at another end;
a hollow telescoping member having a closed end portion constructed and arranged to fit within the confines of said barrel member and in sealing engagement with said second sealing element;
holding means operatively associated with said telescoping member and said barrel member to retain said telescoping member in a fixed position when said telescoping member is moved in a direction away from said nozzle portion; and
means operatively associated with said nozzle portion to temporarily close said nozzle portion to the atmosphere.
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Accused Products
Abstract
An aspiration unit which will afford a uniform suction level for aspirating fluids from body cavities. The unit is composed of a double piston member, a first head of which is in sealing engagement with a syringe barrel and the second head which is oppositely disposed is contained in a telescoping member which is also receivable in the syringe barrel. Upon movement of the telescoping member outwardly from the syringe barrel, a vacuum will be created in the telescoping member as well as in that portion of the barrel member between the first piston member and the nozzle which is closed from atmosphere by means of a valve member. Upon insertion of a flexible tube into a body cavity and opening of the valve member, fluid will be aspirated into the syringe barrel by means of the partial vacuum created in the syringe barrel and in the telescoping member. A clamp means is provided to hold the telescoping member in the vacuum creating condition while the tubular member is inserted into a body cavity. The aspirating device is operable with one hand and is disposable.
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Citations
11 Claims
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1. An aspirating device comprising:
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a barrel member having an internal wall and defining a nozzle portion and an open end portion; a piston member having a first and second head portion receivable in said barrel member; a first sealing element carried by said first piston head portion at one end engageable with said internal wall; a second sealing element carried by said second piston head portion and disposed at another end; a hollow telescoping member having a closed end portion constructed and arranged to fit within the confines of said barrel member and in sealing engagement with said second sealing element; holding means operatively associated with said telescoping member and said barrel member to retain said telescoping member in a fixed position when said telescoping member is moved in a direction away from said nozzle portion; and means operatively associated with said nozzle portion to temporarily close said nozzle portion to the atmosphere. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification