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US 2017/0246433 A1Published application
Actuating mechanism, method of operation and assembly for fluid displacement and pressurizing device
AssigneeAtrion Medical Products, Inc.
InventorsRowland W. Kanner, Brian A. Roberts
Life of this patent
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Abstract
A fluid pressurizing and displacement device which is configured for both macro movement and micro movement of a plunger. In order to execute micro movement of the plunger, a user need only rotate the plunger; to execute macro movement of the plunger, a user need only push or pull the plunger. This simplicity in use is possible because a half-nut (or other suitable structure within the device) remains engaged with the plunger, except when the plunger is being pushed or pulled by its operator. All user motions are simple and intuitive.
Claims14
A fluid pressurizing and displacement device comprising:
- a grip assembly having a first end and a second end;
- a syringe body which extends from the first end of the grip assembly;
- a plunger which extends from the second end of the syringe body, said plunger having a thread thereon;
- an actuating mechanism in the device having a thread thereon which is engaged with the thread on the plunger, and which is configured to automatically disengage the thread on the plunger upon the plunger being pushed or pulled relative to the grip assembly, wherein the fluid pressurizing and displacement device is configured such that pulling the plunger relative to the grip assembly fills the device with fluid, pushing the plunger relative to the grip assembly purges the device of fluid, and rotating the plunger relative to the grip assembly causes the thread on the plunger to interact with the thread on the actuating mechanism.
1 more element
Dependencies are inferred from the claim text.