Hydraulic jack

Details Hydraulic jack Hydraulic jack

2006-09-05

2006-09-05

Watson, Robert C. (Department: 3723)

Implements or apparatus for applying pushing or pulling force

Fluid pressure

Vehicle attached

C254S0930HP, C254S00800R

Reexamination Certificate

active

07100897

ABSTRACT:
Disclosed is a jack lever, in which oil is pumped by piston (10) to move a cylinder (20) faster, vacuum being created at a lower portion of the cylinder (20) moving up, oil in an oil tank (101) being then flowed in the lower portion through an oil suction channel to make the cylinder move up faster. If the cylinder (20) moves upward to push up a work piece, load is exerted into the cylinder (20), so making the piston (10) pumping oil stronger, the oil opening a check ball (15a) mounted on a bypass channel (15) by the pumping and being supplied to the lower portion of the cylinder (20) to move the cylinder up. At this time, the cylinder (20) moves slower but increases ascending force, thus requiring small power to manipulate a jack lever (not shown) pumping the piston (10).

REFERENCES:
patent: 3782689 (1974-01-01), Barosko
patent: 4050674 (1977-09-01), Robbins et al.
patent: 4174095 (1979-11-01), Chipman
patent: 4330104 (1982-05-01), Klok
patent: 4703916 (1987-11-01), Hung
patent: 5542252 (1996-08-01), Hung
patent: 5755099 (1998-05-01), Hung
patent: 06-286984 (1994-10-01), None
patent: 12-198686 (2000-07-01), None

Affiliated with

Also associated with

Rating

Hydraulic jack does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Hydraulic jack, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic jack will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3574206