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. 10, 1981
Filed:
Feb. 14, 1979
John W Boretos, Rockville, MD (US);
Abstract
A single-lumen, one piece catheter approximately 0.04 inch in diameter with an integral balloon at its end having a wall thickness of 0.005 inch or less, sufficiently small to be retractible by suction into the catheter and to be extensible at a desired site by fluid pressure. The balloon may have a calibrated restricted leak aperture. The balloon portion of the catheter is made by heating a portion of the catheter tubing, stretching the tubing lengthwise, and applying fluid pressure to the tubing. The apparatus for forming the balloon includes a spring-loaded clamp to hold the tubing at one end, a capstan to hold the tubing at the other end, a heating coil wrapped around the tubing near the clamped end thereof and mounted with the clamp, and a mechanism for controlling the pressure and volume of the pressurizing gas entering the lumen of the tube in accordance with the retractile movement of the spring-loaded clamp.