Patent ID: 6266959
Filing Date: 2001-07-31
Classification: F15B

Abstract:
A device for saving energy, comprising:a hydraulically operable working assembly;a hydraulic pump;a position accumulator including a housing in which first and second longitudinally displaceable pistons are arranged and are connected facing one another by a coupling part, said coupling part being guided for longitudinal displacement in a partition wall of said housing, said housing and said pistons defining first and second fluid chambers therebetween, said first piston at least partially limiting a preloaded chamber with a predeterminable internal gas pressure on one side of said first piston and with said first fluid chamber being on an opposite side of said first piston, said first fluid chamber being provided with a filler medium and being connected to said working assembly, said second piston at least partially limiting an ambient atmosphere chamber of said piston accumulator, said ambient atmosphere chamber being connected in fluid communication to said working assembly and to said first fluid chamber; anda reversible fluid control unit connecting said second fluid chamber to said hydraulic pump.