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:
Sep. 23, 2025
Filed:
Jul. 16, 2021
C.r. Bard, Inc., Franklin Lakes, NJ (US);
Chad Van Liere, Phoenix, AZ (US);
C. R. Bard, Inc., Franklin Lake, NJ (US);
Abstract
A biopsy device includes a hydraulic drive assembly, a drive mechanism, and a biopsy member. The hydraulic drive assembly includes a chamber housing, a drive piston, a driven piston, a cavity in the chamber housing between the drive piston and the driven piston, and a hydraulic fluid that fills the cavity and hydraulically connects the drive piston to the driven piston. The chamber housing defines a proximal chamber, a distal chamber, and a transition chamber, collectively forming a continuous passage. The drive mechanism includes a motor, a drive gear attached to the motor, a driven gear engaged with the drive gear, and a drive link member coupling the driven gear to the drive piston. The drive mechanism is drivably connected to the drive piston to move the drive piston in the proximal chamber. The driven piston moves in the distal chamber. The biopsy member is connected to the driven piston.