|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||251/254 ; 251/246|
|발명자 / 주소|
|출원인 / 주소|
|인용정보||피인용 횟수 : 4 인용 특허 : 1|
A cryosurgical instrument employing a standard, double-walled, metal vacuum bottle or dewer has a collar metallurgically bonded to the top of the dewer near the mouth thereof to provide machined threads for releasably engaging the delivery and control portion of the instrument to the reservoir portion of the instrument. The collar provides additional strength and support to the portion where the two walls of the dewer are joined to each other. A vent is provided in a bottom cap of the vacuum dewer. A valve directly in the cryogen delivery line is connect...
An improved cyrosurgical instrument including: application means for cryosurgical extraction of heat from living tissue in the treatment thereof; reservoir means for holding liquefied gas cryogen; and operator-controlled means for conveying a cryogen from said reservoir means to said application means; in which the improvement is in said operator-controlled means and comprises: a valve member having a central bore and an annular valve seat disposed along said bore, an upstream end of said bore on one side of said valve seat being in fluid communication w...