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:
Oct. 20, 1992
Filed:
Jun. 22, 1990
LaVon L Bennett, Alpine, UT (US);
Other;
Abstract
A tissue sampling device comprises an inner rod and an outer cannula. A primary piston is attached to a hub on the proximal end of the rod, and a secondary piston is attached to a hub on the proximal end of the cannula. The primary and secondary pistons are coupled to an actuator including a double locking mechanism and a pair of springs. The springs engage the primary and secondary pistons, and the locking mechanism holds the pistons in a cocked position. Upon triggering, the primary piston moves in response to the spring associated therewith. This moves the rod a corresponding distance causing a predetermined length of a sampling notch at the distal end of the rod to extend from the distal end of the cannula and penetrate tissue in the sample target area. Following the movement of the primary piston, the secondary piston is released from the locking mechanism, and the secondary piston moves in response to the spring acting thereon. This moves the cannula along the inner rod, and the sharpened end of the cannula severs tissue in the exposed portion of the notch of the rod and captures the severed tissue as the cannula moves over the exposed portion of the notch. The movement of the primary piston is adjustable, so that the length of the notch exposed to tissue can be controlled thereby allowing adjustable control of the amount of tissue sample that is severed and removed from the target area.