Urinary calculi removing device

Claim 1

W. a.Claimea L i. The Claims defining the invention are as follows:- 1. A "rinary calculi retrieal device comprising: a shaft culminating in a stone basket formed of wires; a sheath housing the said shaft and said stone basket; a compressing control string, which is attached to the tip of the stone basket at one end, and whose other end runs through the sheath parallel to the shaft; and said compressing control string in reaction to applied tension, causing the expansion of wires .of said stone basket, thereby entrapping a stone or stones and whereupon the release of tension, causing the folding of wires, o preventing the falling out of stones. oceo 00 2, The device of claim 1 wherein the wires are formed 0.0 of metal. o -o 3. The device of claim 1 wherein the wires are formed of plastic. The device of claim 1 wherein the wires are formed of a combination of metal and plastic. 0 5. The device of claim 1 wherein the compressing control string is formed of metal. -o~e4 6, The device of claim 1 wherein the shaft is formed i of npn metal. invention are as The device of claiin 1 wherein the sheath is ce comprising: selected from a group consisting of a metal and a non metal." formed of wires; aid stone basket; 8. A method of retrieving urinary calculi using a s attached to the device of any one of the preceding claims. ose other end runs and 9. A urinary calculiretrieval device substantially action to applied as herein described With reference to any one of the said stone accompanying drawings. es and whereupon g of wires, 10. Any novel device or device integer set forth herein, or any novel method or method Step set forth herein, o 9a 4 *9a ,cr the said device, integer, method or step being substantially 4 r 9 e wires are formed as herein described. 4 9* DATED this 29th day of April 1986 wires are formed 94-( -4 4- 4o 99 C.R. BARD, INC. 0 4* 0* 4 4- 94 By Its Patent Attorneys 0' 44 wires are formed 4 ARTHUR S. CAVE cO.. 9444 4-440 9 4. 4-444 compressing 44 44- 94 9 9a -l shaft is formed f t ~i ii ie sheath is il and a non metal. :alculi using a .ce substantially one of the Fer set forth set for-th herein., )eing substantially I 4 C. 1986 SBARD, INC. Es Patent Attorneys VtJR S. CAVE CO.- S 0 4 S 56 8f65 /86 stone 3FlG.1FIG. f Qg sot I P 33 v QS 0 F[G. 3