Hydraulic system including oil replenishment for multi-stage hyd

Details Hydraulic system including oil replenishment for multi-stage hyd Hydraulic system including oil replenishment for multi-stage hyd

1980-12-22

1982-11-09

Rolla, Joseph J.

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

91169, 60405, B66B 1104

Patent

active

043579957

ABSTRACT:
A hydraulic system having a single acting, mult-stage, synchronous hydraulic jack having a trapped oil space which provides the required synchronism. The hydraulic system additionally includes a first external pump in fluid flow communication with an oil space disposed between the outer cylinder and an intermediate section, and a second external pump disposed in fluid flow communication with the trapped oil space between the intermediate section and an inner plunger section. Oil leakage from the trapped oil space is detected when the sections are retracted. The next time the sections are to be extended following such detection, both pumps are automatically started, with the second pump being deactivated when the trapped oil space has been replenished.

REFERENCES:
patent: 191516 (1877-06-01), Comings
patent: 3882678 (1975-05-01), Fassbender
patent: 4043428 (1977-08-01), White et al.
patent: 4116577 (1978-09-01), Lauck
patent: 4201053 (1980-05-01), Atkey

Affiliated with

Also associated with

Rating

Hydraulic system including oil replenishment for multi-stage hyd 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 system including oil replenishment for multi-stage hyd, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic system including oil replenishment for multi-stage hyd will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-742643