Patent ID: 7741569

Claim:
An electronic weight scale comprising: a main scale module including a main housing having a supporting surface, a main weight sensor disposed in said main housing for sensing weight that acts on said supporting surface of said main housing and for outputting an output corresponding to the weight sensed thereby, an input unit mounted on said main housing and operable so as to output a control signal, a controller disposed in said main housing, coupled to said main weight sensor and said input unit, and receiving the output from said main weight sensor and the control signal from said input unit, and a display unit mounted on said main housing and coupled to said controller; and an auxiliary scale unit connected pivotally to said main scale module and including at least one auxiliary scale module that includes an auxiliary housing having a supporting surface, and an auxiliary weight sensor disposed in said auxiliary housing, coupled to said controller of said main scale module, sensing weight that acts on said supporting surface of said auxiliary housing, and outputting an output corresponding to the weight sensed thereby to said controller of said main scale module; wherein said controller is operable, in response to the control signal from said input unit, in one of a folded mode, where said main scale module is stacked on said auxiliary scale unit and where said controller outputs weight information that indicates the output from said main weight sensor to said display unit, and an unfolded mode, where said main scale module and said auxiliary scale unit are unfolded and where said controller outputs weight information that indicates a sum of the output from said main weight sensor and the output from said auxiliary weight sensor of said at least one auxiliary scale module of said auxiliary scale unit to said display unit, such that the weight information is displayed on said display unit.