Pressure measurement devices, methods, and systems
First Claim
1. A method of manufacturing a molded pressure measuring pod that is configured to measure positive and negative pressure of a fluid that flows through the molded pressure measuring pod, the method comprising:
- providing first and second major mold parts having recesses defining major parts of a housing of the pressure measuring pod;
inserting a first pin and a second pin, both having a positive draft, into the first and second major mold parts, the first pin and the second pin being shaped to define a first port and a second port and a flow channel that is configured to permit flow between the first port and the second port through the molded pressure measuring pod;
the first pin having a flat major face that defines an internal surface of a diaphragm, the diaphragm being configured to flex in response to pressure in the molded pressure measuring pod and to prevent flow of fluid through the diaphragm;
closing the first and second major mold parts with the first pin and the second pin therebetween;
injection molding the housing of the pressure measuring pod; and
separating the first and second major mold parts;
withdrawing the first pin and the second pin; and
removing the housing of the pressure measuring pod from the first and second major mold parts.
1 Assignment
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Accused Products
Abstract
A pressure measurement pod for blood circuits can include a flexible, moveable, fluid-impermeable diaphragm and can be formed via either a one-shot or a two-shot molding process. A method of manufacturing a pressure measuring device can include providing first and second major mold parts having recesses defining major parts of a housing, and inserting pins in the first and second major mold parts, the pins being shaped to define a flow channel of a molded pressure measuring pod. One of the pins may have a major face that defines an internal surface of a diaphragm. The method may further include closing the first and second major mold parts with the pins therebetween and injection molding a pressure pod housing. Finally, the pressure pod is removed from the mold parts and the pins are withdrawn from the flow channel.
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Citations
20 Claims
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1. A method of manufacturing a molded pressure measuring pod that is configured to measure positive and negative pressure of a fluid that flows through the molded pressure measuring pod, the method comprising:
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providing first and second major mold parts having recesses defining major parts of a housing of the pressure measuring pod; inserting a first pin and a second pin, both having a positive draft, into the first and second major mold parts, the first pin and the second pin being shaped to define a first port and a second port and a flow channel that is configured to permit flow between the first port and the second port through the molded pressure measuring pod; the first pin having a flat major face that defines an internal surface of a diaphragm, the diaphragm being configured to flex in response to pressure in the molded pressure measuring pod and to prevent flow of fluid through the diaphragm; closing the first and second major mold parts with the first pin and the second pin therebetween; injection molding the housing of the pressure measuring pod; and separating the first and second major mold parts; withdrawing the first pin and the second pin; and removing the housing of the pressure measuring pod from the first and second major mold parts. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification