Becton Dickinson and Co has been granted a patent for a check valve assembly that allows fluid to flow in one direction while resisting flow in the opposite direction. The valve includes a valve diaphragm and an isolating bridge to prevent deformation or stretching when fluid backflow occurs. The valve support surface is designed with two portions, with the valve positioned between them. The distance between the two surface portions is smaller than the distance between the valve diaphragm and the isolating bridge. GlobalData’s report on Becton Dickinson and Co gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on Becton Dickinson and Co, Wearable drug delivery devices was a key innovation area identified from patents. Becton Dickinson and Co's grant share as of September 2023 was 56%. Grant share is based on the ratio of number of grants to total number of patents.

A check valve assembly with a valve and support surface

Source: United States Patent and Trademark Office (USPTO). Credit: Becton Dickinson and Co

A recently granted patent (Publication Number: US11774988B2) describes a check valve assembly with improved functionality and design. The assembly includes an upstream valve support surface with a fluid passageway and a valve comprising a mounting rim, a valve diaphragm, and an annular isolating bridge. The valve diaphragm has an upstream facing surface, a downstream facing surface, and a slit that defines a valve segment.

One key feature of the check valve assembly is the spacing between the first and second surface portions of the upstream valve support surface, which is smaller than the distance between the upstream facing surfaces of the valve diaphragm and the annular isolating bridge. This configuration ensures proper sealing and prevents leakage.

Additionally, the valve diaphragm extends radially inward from the mounting rim, and the downstream facing surface of the valve diaphragm includes a protrusion that extends away from the upstream valve support surface. These design elements contribute to the efficient operation of the check valve assembly.

The annular isolating bridge, which extends between the mounting rim and the valve diaphragm, is designed to engage against the second surface portion of the upstream valve support surface before the valve diaphragm engages against the first surface portion. This sequential engagement ensures that the valve functions correctly and prevents any potential damage.

The upstream valve support surface includes both an inner wall and an outer wall, which resist movement of the annular isolating bridge radially inward and outward, respectively. This design feature enhances the stability and durability of the check valve assembly.

Furthermore, the check valve assembly includes an annular valve retention wall positioned radially outward from the second surface portion of the upstream valve support surface. This wall engages against the outer surface of the mounting rim, directing it radially inward. The inner surface of the annular valve retention wall has a smaller cross-sectional length than the outer surface of the mounting rim, ensuring a secure fit.

Overall, this patented check valve assembly offers improved functionality and reliability due to its unique design features. The precise spacing, sequential engagement, and additional support structures contribute to its efficient operation and prevent any potential issues such as leakage or damage.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.