Hydraulic elevator with an accumulator

Details Hydraulic elevator with an accumulator Hydraulic elevator with an accumulator

2005-10-25

2005-10-25

Salata, Jonathan (Department: 2837)

Elevator, industrial lift truck, or stationary lift for vehicle

Having specific load support drive-means or its control

Includes control for power source of drive-means

C187S275000

Reexamination Certificate

active

06957721

ABSTRACT:
A pump is situated between the hydraulic drive and the accumulator, this pump being driven by a motor and conveying hydraulic oil from the hydraulic drive to the accumulator and vice versa without the presence of control valves which influence the flow of hydraulic oil, such as proportionally pilot-operated valves. Since the pump is subjected to the pressure Pzin the cylinder line and the pressure Psin the accumulator line, the motor of the pump only has to work against the differential pressure and in certain operating states, can even function as a generator and release electrical energy through a power output device controlling it. The speed of the car is controlled through the control of the motor alone by a control and regulation device, through the power output device.

REFERENCES:
patent: 2269786 (1942-01-01), Rose
patent: 3762165 (1973-10-01), Takenoshita et al.
patent: 3842943 (1974-10-01), Nakamura et al.
patent: 3892292 (1975-07-01), Takenoshita et al.
patent: 4638888 (1987-01-01), Coy
patent: 4761953 (1988-08-01), Rosman
patent: 5281774 (1994-01-01), Masaki
patent: 5349142 (1994-09-01), Hasegawa
patent: 5579868 (1996-12-01), Pelto-Huikko
patent: 5648644 (1997-07-01), Nagel
patent: 6142259 (2000-11-01), Veletovac et al.
patent: 6505711 (2003-01-01), Zurcher et al.
patent: 6584769 (2003-07-01), Bruun
patent: 6739127 (2004-05-01), Nippert et al.

Affiliated with

Also associated with

Rating

Hydraulic elevator with an accumulator 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 elevator with an accumulator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic elevator with an accumulator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3455888