Jack
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jun 4, 2002
Grant Date -
N/A
app pub date -
Jan 16, 2001
filing date -
Jan 16, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A jack comprises a frame, a base including an end pivotally mounted to the frame and an engaging portion, an elevating member securely attached to the other end of the base, and a cylinder device including an end pivotally connected to the frame. The cylinder device includes a cylinder and a piston rod having a first end slidably received in the cylinder and a second end beyond the cylinder. The second end of the piston rod is connected to the base to move therewith. When an end of an operative rod is engaged with the engaging portion of the base, the elevating member is quickly elevated when another end of the operative rod is applied with a force. When the operative rod is engaged with the cylinder device, the elevating member is elevated under manual operation on the operative rod.
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