Implements or apparatus for applying pushing or pulling force – Single throw lever – Mechanically actuated
Patent
1985-06-28
1986-04-22
Watson, Robert C.
Implements or apparatus for applying pushing or pulling force
Single throw lever
Mechanically actuated
B66F 308
Patent
active
045837139
ABSTRACT:
A pantograph jack apparatus for elevating a motor vehicle includes first and second upper arms pivotally connected to a supporting plate engageable with the motor vehicle and first and second lower arms pivotally connected to a base plate supporting the jack apparatus at ground level. The first upper arm and first lower arm are pivotally connected to a threaded connecting nut that is threaded on the threaded portion of a shaft member. The second upper arm and second lower arm are pivotally connected to a connecting bearing rotatably mounted on the non-threaded portion of the shaft member. The connecting bearing is axially movable on the shaft member between two stop portions so that, when the connecting bearing abuts against the first stop portion, the jack is in its lowered position for storage and, when the connecting bearing abuts against the second stop portion, the jack is raised to a position where it is engageable with a jacking portion of the motor vehicle body. Thus, the jack can be raised to engage the motor vehicle body without rotating the shaft member. The pantograph jack apparatus also is provided with a mechanism for preventing the jack from being lowered by gravity after it has been raised to engage the motor vehicle body.
REFERENCES:
patent: 3857548 (1974-12-01), Takeuchi
patent: 4092012 (1978-05-01), Ishigami
Fukura Kenichi
Nagata Kazuhisa
Yamauchi Nobuhiro
Aisin Seiki Kabushiki Kaisha
Watson Robert C.
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