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Self-propelled apparatus 원문보기

IPC분류정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판)
  • E21B-023/00
출원번호 US-0660896 (1991-02-26)
우선권정보 AU-0008810 (1990-02-26)
발명자 / 주소
  • Graham Gordon A. (28 Tuscan Street Rossmoyne W.A. 6155 AUX) Pasznicki William V. (5 Pavetta Crescent Forrestfield W.A. 6058 AUX) Connell William F. (Lot 186 Old Northam Road Chidlow W.A. 6556 AUX) Pr
인용정보 피인용 횟수 : 85  인용 특허 : 0

초록 ▼

A self-propelled powered apparatus for traveling along a tubular member includes power driven wheels for propelling the apparatus, a biasing means for biasing the driven wheels into contact with the inner surface of the tubular member, and a retracting means for retracting the driven wheels from the

대표청구항 ▼

A self-propelled apparatus, driven by a power, for travelling along a tubular member or shaft comprising: driven wheels for propelling said apparatus in a direction of travel, the driven wheels being powered by the power; means for biasing said wheels into a driving position in contact with an inner

이 특허를 인용한 특허 (85)

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