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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) |
|
출원번호 | US-0686169 (1976-05-13) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 26 인용 특허 : 0 |
A jack stand with a safety locking device whereby the pin for locking the extensible member with respect to the base or housing is keyed so as to prevent withdrawal of the pin until rotated into an aligned position. The through hole in the base for receiving the locking pin is slotted so as to recei
A jack stand comprising: a generally upright tubular member, said first tubular member having means for defining a base for resting on a horizontal surface, and having a horizontally disposed through hole adjacent the upper end thereof; a second generally upright tubular member coaxial with and slid
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