Abstract: A key blank comprises a shaft and a head connected to the shaft, the shaft including first and second surface that are oppositely facing, wherein the surfaces are configured to include combination elements to operate a lock and a pair of coaxial operating elements, wherein one element of the pair is operative from the first surface of the shaft and the other element of the pair is operative from the second surface of the shaft, and wherein at least one of the operative elements is a resilient element mounted inside a bore provided in the shaft, wherein the resilient element is operative to exert a compressive force on a pin mechanism of the lock in response to the operative engagement and thereby release the pin mechanism from a lock position, without requiring any pressure on the coaxial element on the other side.

Abstract: A substantially burglary-proof lock, comprises a housing formed with a cylindrical bore defining an inner cylindrical surface, and a cylinder within said bore carrying locking elements movable to locking and unlocking positions with respect to said housing, said cylinder having an outer diameter equal to the diameter of said bore so as to be rotatable when the locking elements are in unlocking position with respect to said housing, said cylinder being formed with a keyway for receiving a proper key in order to move said locking elements to their locking and unlocking positions with respect to said housing, characterized in that said cylinder carries at least one insert of a hard material configured, dimensioned and located such as to prevent pull-out of the cylinder from the housing by a pull-out force applied to the cylinder, and/or by drilling through the locking elements.

Abstract: A substantially burglary-proof lock, comprises a housing formed with a cylindrical bore defining an inner cylindrical surface, and a cylinder within said bore carrying locking elements movable to locking and unlocking positions with respect to said housing, said cylinder having an outer diameter equal to the diameter of said bore so as to be rotatable when the locking elements are in unlocking position with respect to said housing, said cylinder being formed with a keyway for receiving a proper key in order to move said locking elements to their locking and unlocking positions with respect to said housing, characterized in that said cylinder carries at least one insert of a hard material configured, dimensioned and located such as to prevent pull-out of the cylinder from the housing by a pull-out force applied to the cylinder, and/or by drilling through the locking elements.

Abstract: System for refilling a fuel cell wherein the system includes a main container having at least one movable fuel container, at least one movable electrolyte container, and at least one spent fuel chamber. A valve which regulates or controls fluid flow between the main container and a fuel cell and vice versa. A method of refilling a fuel cell provides for moving the at one movable fuel container and the at least one movable electrolyte container to cause spent fuel from fuel cell to enter the at least one spent fuel chamber. This Abstract is not intended to define the invention disclosed in the specification, nor intended to limit the scope of the invention in any way.

Abstract: Disposable fuel cell and a system for filling a disposable fuel cell. The system includes a fuel cell having at least one chamber, a cartridge having at least one chamber, and a valve system which regulates or controls fluid flow between the cartridge and fuel cell. A method of refilling a fuel cell provides for connecting the cartridge to the fuel cell and transferring fuel and electrolyte from the cartridge to the fuel cell. This Abstract is not intended to define the invention disclosed in the specification, nor intended to limit the scope of the invention in any way.

Abstract: System for refilling a fuel cell wherein the system includes a fuel cell having at least one variable volume chamber, a cartridge having at least one variable volume chamber, and a valve system which regulates or controls fluid flow between the cartridge and fuel cell and vice versa. A method of refilling a fuel cell provides for connecting the cartridge to the fuel cell and transferring fuel and electrolyte from the cartridge to the fuel cell. This Abstract is not intended to define the invention disclosed in the specification, nor intended to limit the scope of the invention in any way.

Abstract: System for refilling a fuel cell wherein the system includes a main container having at least one movable fuel container, at least one movable electrolyte container, and at least one spent fuel chamber. A valve which regulates or controls fluid flow between the main container and a fuel cell and vice versa. A method of refilling a fuel cell provides for moving the at one movable fuel container and the at least one movable electrolyte container to cause spent fuel from fuel cell to enter the at least one spent fuel chamber. This Abstract is not intended to define the invention disclosed in the specification, nor intended to limit the scope of the invention in any way.