Abstract: Example energy storage systems (20, 20?, 20?) comprises a fluid circuit (22, 22?, 22?) and an electrical unit (24, 24?, 24?) configured to operate as a motor in a first phase of operation and to operate as a generator in a second phase of operation. The fluid circuit (22, 22?, 22?) comprises a first fluid container (30, 30?, 30?) situated so content of the first fluid container experiences a first pressure level; a tank (32, 32?, 32?) having its content at a second pressure level (the second pressure level being less than the first pressure level): and, a first hydraulic motor/pump unit (34, 134, 34?) connected to communicate a first working fluid between the tank and the first fluid container. In the first phase of operation electricity is supplied to the first hydraulic/motor unit (34, 134, 34?) whereby the first hydraulic/motor unit transmits the first working fluid from the tank into the first fluid container (30, 30?, 30?).

Abstract: Example energy storage systems (20, 20?, 20?) comprises a fluid circuit (22, 22?, 22?) and an electrical unit (24, 24?, 24?) configured to operate as a motor in a first phase of operation and to operate as a generator in a second phase of operation. The fluid circuit (22, 22?, 22?) comprises a first fluid container (30, 30?, 30?) situated so content of the first fluid container experiences a first pressure level; a tank (32, 32?, 32?) having its content at a second pressure level (the second pressure level being less than the first pressure level): and, a first hydraulic motor/pump unit (34, 134, 34?connected to communicate a first working fluid between the tank and the first fluid container. In the first phase of operation electricity is supplied to the first hydraulic/motor unit (34, 134, 34?) whereby the first hydraulic/motor unit transmits the first working fluid from the tank into the first fluid container (30, 30?, 30?).

Abstract: The present invention provides techniques for imparting both flexibility and lamination to leaves or sheets comprising laminate films, including but not limited to leaves or sheets which at least partially enclose or encase printed matter to or between laminate film(s). The first laminate film and the second laminate film may or may not have part of all of a segment of printed matter, e.g., a display content sheet, positioned or sandwiched therebetween. All embodiments have a flex or flexible zone which provides flexibility to the leaf or sheet, the thickness of the flex zone being thinner than the thickness of portions of the leaf or sheet having two laminate films. The flex zone of each sheet or leaf provides flexibility for the leaf at strategic locations, the remainder of the sheet or leaf having durability and stiffness as afforded by the two films of lamination and the adhesive utilized in conjunction with one or both of the two lamination films.

Abstract: The present invention provides techniques for imparting both flexibility and lamination to leaves or sheets comprising laminate films, including but not limited to leaves or sheets which at least partially enclose or encase printed matter to or between laminate film(s). The first laminate film and the second laminate film may or may not have part of all of a segment of printed matter, e.g., a display content sheet, positioned or sandwiched therebetween. All embodiments have a flex or flexible zone which provides flexibility to the leaf or sheet, the thickness of the flex zone being thinner than the thickness of portions of the leaf or sheet having two laminate films. The flex zone of each sheet or leaf provides flexibility for the leaf at strategic locations, the remainder of the sheet or leaf having durability and stiffness as afforded by the two films of lamination and the adhesive utilized in conjunction with one or both of the two lamination films.