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:
May. 05, 1998
Filed:
Jan. 17, 1995
Louis E Humphrey, Jr, San Jose, CA (US);
Laserscope, San Jose, CA (US);
Abstract
The BTR device of the present invention preferably comprises a housing chamber with an attached hand grip and actuating ringlet positioned to be grasped and pulled toward the hand grip. Inside the housing chamber is a hollow, open-ended, helically-slotted cylindrical element having a diagonal groove formed within the outer surface. A travelling pin, attached to the actuating ringlet, is fitted within the diagonal groove such that movement of the actuating ringlet simultaneously moves the travelling pin and rotates the helically-slotted cylindrical element. Gear teeth on the helically-slotted cylindrical element engage gear teeth on an inner shaft element rotatably positioned within the helically-slotted cylindrical element such that rotation of the helically-slotted cylindrical element is transferred to the inner shaft element. Rotation of the inner shaft element simultaneously rotates an attached excision sleeve to permit smooth and simple cutting of a uniform tissue fragment which is then removed through the BTR device without the need to withdraw the BTR device from the surgical access site. A tension spring urges the released actuating ringlet to its original position when the pulling force is withdrawn thereby causing the helically-slotted cylindrical element to rotate reversely. The inner shaft element, and attached excision sleeve, however, do not reversely rotate due to a separating coil which prevents engagement of the gear teeth when the pulling force is withdrawn.