Force measuring arrangement, force measuring apparatus having such a force measuring arrangement, and method using such a force measuring arrangement
Inventors
Assignees
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Publication Number
US-12038415-B2
Publication Date
2024-07-16
Expiration Date
Abstract
The invention relates to a force measuring arrangement (3) in particular for applying a test parameter to a specimen and/or for measuring a resistance force applied by the specimen, having at least one force absorption element (25), a first fastening device and a force transmission element (27), wherein the force absorption element (25) can be fastened to a force measuring device in a movable manner by means of the first fastening device, wherein the force absorption element (25) is designed to measure a relative force acting between two force absorption regions, namely a first force absorption region and a second force absorption region (51), wherein the first fastening device is able to be connected to the force absorption element (25) in a force-transmitting manner via the first force absorption region, wherein the second force absorption region (51) is able to be connected to the force transmission element (27) in a force-transmitting manner by means of a second fastening device, wherein the force transmission element (27) is designed to apply a test parameter to a specimen. The force measuring arrangement is notable in that the second fastening device has a magnet (37) that is designed to retain the force transmission element (27) at least in a state connected to the second force absorption region (51) in a force-transmitting manner.
Core Innovation
The document describes a force measuring arrangement for applying a test parameter to a specimen and/or for measuring a resistance force applied by the specimen. The arrangement includes at least one force reception element with a first force reception region and a second force reception region, where the first and second regions are configured to measure a relative force acting between them. The force reception element is displaceably fastened to a force measuring device by means of a first fastening device, and the first fastening device connects to the force reception element force transmissively via the first force reception region.
The second force reception region is connected force transmissively to a force transmission element by means of a second fastening device. The force transmission element is designed to apply the test parameter to the specimen, and the second fastening device has a magnet designed to retain the force transmission element, at least in a state connected to the second force reception region, force transmissively.
The document further describes force measuring arrangements and devices for medical hollow bodies, where the force transmission element includes a rod configured to penetrate into an internal volume and to act on a plug element. Accuracy is addressed by defining circular ring-shaped flat contact surfaces arranged perpendicular to a loading axis and by providing minimal-clearance radial retention features for positioning. Additional features include magnet retention to avoid tilting, optional shim-length matching, optional magnetizable regions and plasma nitrided stainless steel, and gravity compensation by taring when determining the resistance force as a function of the test parameter.
Claims Coverage
The partial content provides one independent claim (clm-00001). It includes inventive features centered on a two-region force reception element with a magnet-retained force transmission connection for force-transmissive application of a test parameter and resistance-force measurement, with dependent claims further refining medical-hollow-body adaptations and force-determination accuracy.
Magnet-retained force-transmissive connection between second force reception region and force transmission element
The second force reception region is connected to the force transmission element force transmissively by a second fastening device, and the second fastening device has a magnet designed to retain the force transmission element, at least in a state connected to the second force reception region, force transmissively.
Relative-force measurement between first and second force reception regions with displaceable force reception element
The force reception element is designed to measure a relative force acting between two force reception regions, namely a first force reception region and a second force reception region, and the force reception element can be displaceably fastened to a force measuring device by means of a first fastening device.
Force-transmissive application of a test parameter to a specimen using a force transmission element connected via fastening devices
The first fastening device connects to the force reception element force transmissively via the first force reception region, the second force reception region is connected force transmissively to the force transmission element by the second fastening device, and the force transmission element is designed to apply a test parameter to a specimen.
Across the partial claims, the core inventive coverage is a force measuring arrangement that measures relative force between first and second force reception regions while applying a test parameter to a specimen via a force transmission element. The key differentiator is the magnet in the second fastening device that retains the force transmission element force transmissively in the connected state to the second force reception region.
Stated Advantages
Improved accuracy by avoiding tilting through magnet retention and by using defined circular ring contact surfaces perpendicular to a loading axis.
Compensation of gravity effects by taring when determining the resistance force.
Adjustment of length to match an engagement height and/or the length of a medical hollow body by using a shim.
Documented Applications
Medical hollow bodies, including medicament containers and syringes/carpules/ampoules/vials, where a rod force transmission element penetrates into an internal volume and acts on a plug element.
Force measuring devices including a specimen holder and a control device configured to determine a resistance force as a function of a test parameter and measured relative force.
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