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특허 상세정보

Source of vacuum and device for maintaining a negative pressure in an enclosure

특허상세정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) A61M-001/00    B65B-031/04    B65D-081/20    F04B-021/00   
미국특허분류(USC) 99/472 ; 73/731 ; 116/DIG ; 9 ; 128/278
출원번호 US-0957286 (1978-11-02)
우선권정보 FR-0033716 (1977-11-09); FR-0022802 (1978-08-02)
발명자 / 주소
인용정보 피인용 횟수 : 63  인용 특허 : 1
초록

The source of vacuum comprises a tubular body in which a piston which is combined with a piston rod is axially slidable. A seal is interposed between the rod and the body where the rod extends out of the body. A suction orifice is provided which is on the axis of or in the vicinity of the axis of the body and parallel to the axis. An arrangement is provided for holding the body and urging the piston to one end of the body in one hand. A communication passage is provided for putting the suction orifice in communication with a chamber defined between the p...

대표
청구항

A source of vacuum comprising: a wall laterally defining a tubular body which has a first end portion and a second end portion and an axis and defines an inner chamber, a piston slidable in the body, a rod connected to the piston, an aperture in the body, the rod extending through the aperture, sealing means interposed between the aperture and the rod, means defining a suction orifice located at least in the vicinity of and parallel to said axis, means for depressing the piston toward the second end portion of the body, and communication means for puttin...

이 특허를 인용한 특허 피인용횟수: 63

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