公开(公告)号：US4162677A

公开(公告)日：1979-07-31

申请号：US798364

申请日：1977-05-19

Applicant: Harold D. Gregory

Inventor： Harold D. Gregory

IPC: A61B18/02 ,  A61B17/36

CPC classification number: A61B18/02

Abstract: A hand-held cryogenic device for and method of necrotizing and shaving live tissue having a chamber chargeable with liquid cryogen. One heat conductive wall of the chamber is adapted to be flooded with cryogen while being manipulated over the tissue and includes an opening allowing gaseous cryogen to escape in contact with the tissue. This wall is selectively effective to shave or slice away necrotized tissue.

公开(公告)号：US4367743A

公开(公告)日：1983-01-11

申请号：US218531

申请日：1980-12-22

Applicant: Harold D. Gregory

Inventor： Harold D. Gregory

IPC: A61B17/32 ,  A61B18/02 ,  F17C9/00 ,  F25D3/10 ,  A61B17/36

CPC classification number: A61B17/3203 ,  A61B18/0218 ,  F17C9/00 ,  F25D3/10 ,  F17C2201/032 ,  F17C2201/058 ,  F17C2205/0329 ,  F17C2205/0332 ,  F17C2205/0382 ,  F17C2221/014 ,  F17C2223/0161 ,  F17C2223/047 ,  F17C2250/0636 ,  F17C2270/02 ,  F17C2270/0509

Abstract: Apparatus and method for dispensing a jet of cryogenic coolant selectively in single gaseous phase and in dual gaseous and finely divided liquid phase from a self-pressurizing source of heat saturated liquid coolant. The coolant is stored under constant pressure and in a heat-saturated condition and, when needed, is partially expanded into an expansion chamber equipped with a coolant jetting orifice and a venting orifice regulatable to control coolant flow from the jetting orifice in single or dual phase. The liquid coolant is conveniently stored in a hand-held dewar flask equipped with a pressure relief valve and utilizing a relatively long, small bore passage as the coolant jetting orifice.

Abstract translation: 选择性地在单一气相中分配低温冷却剂射流的装置和方法以及来自热饱和液体冷却剂的自加压源的双重气态和细分液相。 冷却剂在恒定压力和热饱和状态下储存，并且在需要时被部分膨胀成具有冷却剂喷射孔的膨胀室和可调节的排气孔，以控制单相或双相中喷射孔的冷却剂流动 。 液体冷却剂方便地储存在装有减压阀的手持式杜瓦瓶中，并且利用较长的小孔通道作为冷却剂喷射孔。

公开(公告)号：US4376376A

公开(公告)日：1983-03-15

申请号：US148828

申请日：1980-05-12

Applicant: Harold D. Gregory

Inventor： Harold D. Gregory

IPC: A61B17/32 ,  A61B18/02 ,  F17C9/00 ,  A61B17/36

CPC classification number: A61B17/3203 ,  A61B18/02 ,  F17C9/00 ,  F17C2201/032 ,  F17C2201/058 ,  F17C2205/0134 ,  F17C2205/0329 ,  F17C2205/0332 ,  F17C2205/0338 ,  F17C2205/0382 ,  F17C2221/014 ,  F17C2221/031 ,  F17C2223/0123 ,  F17C2223/0161 ,  F17C2223/047 ,  F17C2225/0123 ,  F17C2225/0161 ,  F17C2250/0636 ,  F17C2265/025 ,  F17C2270/02 ,  F17C2270/0509

Abstract: A cryogenic device and a method for selectively dispensing a jet of gas or a mixture of gas and liquid cryogen particles, that is, single phase or two phase fluid, at the user's option, from a nozzle selected from a range of nozzle sizes. Pressurized liquid cryogen is supplied through an orifice to a nozzle-equipped expansion chamber also connected to a pressure regulated source of gas. A valve-controlled passage venting to the atmosphere from the expansion chamber is normally closed but, when open, is effective to reduce the chamber pressure by a major fraction of 1 psig provided the gas flow from the pressurized gas source is interrupted. The single phase gas jet dispensed in the non-venting mode substantially instantly converts to a stable two phase jet of gas and liquid particles irrespective of which one of the nozzle sizes is then in use. If the liquid cryogen pressure falls during the use of a larger nozzle, the pressure is quickly re-established by briefly admitting gas from the pressure regulated source via the expansion chamber and back flow into the liquid supply.

Abstract translation: 一种低温装置和用于从用户选择的喷嘴尺寸范围内的喷嘴中选择性地分配气体射流或气体和液体致冷剂颗粒的混合物，即单相或双相流体的方法。 加压液体冷冻剂通过孔口供应到也连接到压力调节气体源的喷嘴设置的膨胀室。 从膨胀室排出到大气中的阀控通道通常是关闭的，但是当打开时，如果来自加压气体源的气体流被中断，则有效地将室压力降低1psig的大部分。 以非排气模式分配的单相气体射流基本上立即转化为气体和液体颗粒的稳定的两相射流，而不管使用哪一个喷嘴尺寸。 如果在使用较大的喷嘴期间液体冷冻剂压力降低，则通过从压力调节源经由膨胀室简单地允许气体和回流进入液体供应源来快速重新建立压力。