Title:
前部引込みによる再使用不能医療装置
Document Type and Number:
Japanese Patent JP3665336
Kind Code:
B2
Abstract:
A nonreusable medical device has a needle for injecting or collecting fluid which is retractable by depression of a plunger slidingly mounted in the medical device. A front-mounted retraction mechanism has a needle holder connected to the needle. The needle holder is supported along the axis of the device by means of a frictionally engaged retainer ring member coupled to the needle holder along an axially aligned sliding interface. The needle holder and retainer ring are positioned in the front portion of a hollow body. The front of a movable member or plunger presses against the retainer member passing around the needle holder which cannot move forward, thereby separating the retainer member from the needle holder. The separation occurs by gradually reducing the extent of the sliding interface area until the retainer member pops loose from the needle holder whereupon the needle holder and needle are retracted into a cavity in the plunger in response to a retraction force applied to the needle holder by a previously compressed spring.
Inventors:
Shaw, Thomas, Jay.
Application Number:
JP50981395A
Publication Date:
June 29, 2005
Filing Date:
September 07, 1994
Export Citation:
Assignee:
Shaw, Thomas, Jay.
International Classes:
A61M5/00; A61M5/32; A61M5/31; A61M5/50; (IPC1-7): A61M5/31; A61M5/32
Domestic Patent References:
| JP4020351U | ||||
| JP7506011A | ||||
| JP4124163U |
Foreign References:
| US5019044 | ||||
| US5114410 | ||||
| US4966593 |
Attorney, Agent or Firm:
Hideto Asamura
Hajime Asamura
Takakazu Yamamoto
Yukio Iwamoto
Hajime Asamura
Takakazu Yamamoto
Yukio Iwamoto