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:
Mar. 19, 2002
Filed:
Jan. 31, 2000
Hugh Bourassa, Temecula, CA (US);
Other;
Abstract
The biopsy needle device has an axially elongated stylet and a cannula coaxially disposed thereabout, the stylet and cannula being mounted on stylet and cannula bases that are slidably mounted within a cavity of an elongate housing. The cavity also contains a spring-loaded firing mechanism for firing the stylet and cannula for taking a tissue sample from a patient. The stylet base contains a safety stylet latch lever and a firing stylet latch lever for retaining the stylet in the first, retracted position until released. The cannula base includes a safety cannula latch lever and a locking cylinder for retaining the cannula base in the first retracted position until released. Once the safety and firing stylet latch levers have been released, the stylet base advances to contact a finger of the stop pad, thereby releasing the safety cannula latch lever. The tissue of the patient prolapses into a side-facing notch of the advancing stylet. Once the locking cylinder has been released with a cannula firing button, the cannula base advances to contact the stop pad, thereby causing the cannula to advance to cover the side-facing notch, thereby severing and containing the tissue. In the preferred embodiment, the stop pad is threaded engaged upon an adjustment screw; and the stop pad transmits the force of the impact of both the stylet and cannula bases through the adjustment screw to a resilient diaphragm of the housing, thereby dampening the force of the impacts.