Method for air quenching an elongated glass hollow body comprising an axial bore
Inventors
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CrossjectCrossject is a specialty pharmaceutical company focused on drug-device combination products for emergency medicine. Leveraging a proprietary needle-free auto-injection platform, the company develops and manufactures fast-acting treatments for life-threatening situations such as epilepsy, adrenal crisis, and anaphylaxis. Crossject conducts advanced regulatory development, clinical validation, and large-scale industrialization to deliver innovative therapies for global markets, with an emphasis on simplicity, reliability, and patient usability.
Crossject is a specialty pharmaceutical company focused on drug-device combination products for emergency medicine. Leveraging a proprietary needle-free auto-injection platform, the company develops and manufactures fast-acting treatments for life-threatening situations such as epilepsy, adrenal crisis, and anaphylaxis. Crossject conducts advanced regulatory development, clinical validation, and large-scale industrialization to deliver innovative therapies for global markets, with an emphasis on simplicity, reliability, and patient usability.
Publication Number
US-11643353-B2
Publication Date
2023-05-09
Expiration Date
Abstract
A method for air quenching a glass hollow body elongated along a main axis, including a wall having an external surface, and an internal surface formed by a bore extending in height along the main axis, is provided. The method includes simultaneously blasting air jets towards the surfaces of the glass hollow body using air blast nozzles directed towards the surfaces. External nozzles distribute air jets over the external surface of the glass hollow body and a nozzle above the bore of the glass hollow body and aligned along the main axis distributes an internal air jet over the internal surface of the glass hollow body. In a transverse plane to the main axis the internal air jet is in the form of a crown having a recess at the center.
Core Innovation
The invention provides a method for air quenching a glass hollow body elongated along a main axis, the wall having an external surface and an internal surface formed by a bore extending along the main axis. The method simultaneously blasts and distributes air jets over the external surface and the internal surface of the glass hollow body, with an internal air jet distributed over the internal surface aligned along the main axis.
An axial nozzle blasting the internal air jet is positioned substantially external to and above the bore. The axial nozzle includes a solid axial core and an external wall cooperating with each other to define circular arc shaped passages therebetween, and the internal air jet flowing through the circular arc shaped passages forms a ring with an opening at a center thereof in a plane transverse to the main axis.
The described approach reports improved uniformity of residual compressive stress on the inner wall versus a prior art radial+axial-nozzle setup, and a faster and better-distributed cooling temperature drop. The description also includes installation/nozzle geometry in which an axial nozzle core is connected by radii forming circular-arc air passages.
The quenched glass tube is further described as being used as a reservoir in a needleless injection device containing a plunger, a pressurized gas generator, and active ingredients.
Claims Coverage
The provided independent claim contains the core inventive concept. The claim set is refined by dependent inventive features that further limit the internal nozzle placement and geometry, and the external jet nozzle arrangement and motion.
Simultaneous external and internal air-jet distribution aligned along the main axis
Simultaneously blasting and distributing air jets over the external surface and the internal surface of the glass hollow body, wherein an internal air jet distributed over the internal surface is aligned along the main axis.
Axial internal nozzle forming a ring with a central opening via circular arc shaped passages
An axial nozzle blasting the internal air jet positioned substantially external to and above the bore, wherein a portion of the axial nozzle includes a solid axial core and an external wall cooperating with each other to define circular arc shaped passages therebetween, the internal air jet flowing through the circular arc shaped passages forms a ring with an opening at a center thereof in a plane transverse to the main axis.
Internal axial nozzle positioned substantially external to and above the bore
An axial nozzle blasting the internal air jet positioned substantially external to and above the bore.
Axial nozzle with radii connecting a solid axial core to an external wall
An axial nozzle includes radii connecting a solid axial core to an external wall.
External nozzles blasting and distributing air jets over the external surface
Using external nozzles to blast and distribute air jets over the external surface of the glass hollow body.
External nozzles extending substantially over the entire height of the external surface
The external nozzles extend substantially over the entire height of the external surface of the glass hollow body.
Rotating external nozzles about the main axis during air-jet blasting
Rotating external nozzles about a main axis during blasting and distributing the air jets over the external surface.
Across the independent claim and its dependents, the inventive concept is simultaneously distributing air jets over both the external and internal surfaces with an internal air jet aligned along the main axis, while shaping the internal jet as a ring with a central opening using an axial nozzle having a solid axial core and an external wall defining circular arc shaped passages; dependents further specify the internal nozzle placement, the radii-based nozzle geometry, and external nozzle coverage and rotation about the main axis.
Stated Advantages
Improved uniformity of residual compressive stress on the inner wall versus a prior art radial+axial-nozzle setup.
Faster cooling temperature drop.
Better-distributed cooling temperature drop.
Documented Applications
Using the quenched glass tube as a reservoir in a needleless injection device including a plunger, a pressurized gas generator, and active ingredients.
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