The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 14, 2025
Filed:
May. 25, 2018
West Pharmaceutical Services, Inc., Exton, PA (US);
Stacy Faught, Scottsdale, AZ (US);
Jorge Santos, Scottsdale, AZ (US);
West Pharmaceutical Services, Inc., Exton, PA (US);
Abstract
A syringe includes a plunger having multiple sections of differing diameters or materials, and a barrel with a cavity into which the plunger is inserted. The barrel includes a first probe and a second probe opposite to one another such that an interior volume of the barrel is radially between the first and second probes. A microcontroller is configured to measure a capacitance between the first and second probes, with the measured capacitance having a first capacitance value when the first section of the plunger shaft is between the first and second probes and a second capacitance value different from the first capacitance value when a second section of the plunger shaft is between the first and second probes. The microcontroller is configured to determine that an injection has been completed when the second capacitance value is measured.