Variable displacement inflation devices and methods of use
AssigneeMerit Medical Systems, Inc.
InventorsBrian Stevens, William Padilla, Steven Weir
Life of this patent
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Abstract
An inflation device that may comprise multiple plungers is disclosed. The inflation device may have multiple configurations wherein certain plungers are locked with respect to a body of the inflation device while others are configured to be displaceable within the body. Each plunger may be configured with a different effective surface area, allowing a practitioner to vary the amount of force required to attain certain pressures.
Claims20
An inflation device configured to displace fluid within a medical device, the inflation device comprising:
- a body member defining a reservoir;
- a first plunger displaceable within the body member, the first plunger configured to automatically transition to a locked configuration wherein the first plunger is coupled to the body member when a fluid disposed within the reservoir is at or above a first pressure;
- a second plunger displaceable within the body member;
- and
- a handle operably coupled to the first and second plungers.
The inflation device of claim of 1, wherein the reservoir comprises a first portion and a second portion, and wherein the first plunger is selectively displaceable within the first portion and the second plunger is selectively displaceable within the second portion.
An inflation device comprising:
- a syringe body defining a reservoir;
- a first plunger disposed within the syringe body, the first plunger comprising an outer plunger and an intermediate plunger, and the outer plunger and the intermediate plunger are releasably coupled to each other;
- a locking sleeve disposed around and releasably coupled to the intermediate plunger;
- a second plunger disposed within the first plunger;
- and
- a handle operably coupled to the first and second plungers, the handle configured to displace the first and second plungers with respect to the syringe body.
A method of displacing fluid within an inflation device, comprising:
- displacing a handle such that a first plunger, coupled to the handle, displaces fluid within a reservoir until the reservoir reaches a first pressure and the first plunger automatically couples to a body member defining the reservoir;
- and
- displacing the handle such that a second plunger, coupled to the handle, displaces fluid within the reservoir.
Dependencies are inferred from the claim text.