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US 4,611,677 AGranted
Shock proof scale
AssigneeNational Controls, Inc.
InventorGeorge T. Yu
Life of this patent
Estimating the term…
Abstract
Electronic weighing scale having a load bridge with torsion bars for transmitting a load from a platform to a load cell. The torsion bars flex torsionally to protect the load cell from overloading and shock loading. The platform rests loosely on the load bridge and is freely displaceable to protect the load cell from side loading or other impacts on the platform.
Claims21
In an electronic weighing scale:
- a load cell which provides an output signal corresponding to the load applied thereto, a load bridge mounted on the load cell having a plurality of torsion bars through which a load is applied to the load cell, said torsion bars flexing torsionally to protect the load cell from shock loading and overloading, and a load receiving platform mounted on the load bridge and being freely displaceable therefrom to protect the load cell from side loading.
In an electronic weighing scale:
- a horizontally extending platform for receiving a load to be weighed, a load cell which produces an output signal corresponding to the load applied thereto, and a load bridge mounting the platform on the load cell, said load bridge comprising a support head mounted on the load receiving member of the load cell and a pair of generally U-shaped torsion bars each having a central arm affixed to the support head and a pair of load receiving arms which extend outwardly from the central arm and receive the platform in supporting relationship such that loads applied to the platform are transferred to the load cell through the torsion bars with the central arms flexing torsionally about their axes to protect the load cell from overloading and shock loading.
In an electronic weighing scale:
- a load cell which produces an output signal corresponding to the load applied thereto, a load bridge having a pair of outwardly extending arms for applying loads to the load cell, and a platform resting loosely on the arms of the load bridge and being freely displaceable in the event of an impact on the platform.
In an electronic weighing scale:
- a load receiving member, a load cell which provides an output signal corresponding to the load applied thereto, and a torsion bar having a first arm portion affixed to the load cell and a second arm portion extending at an angle from the first arm portion for transferring a load from the load receiving member to the load cell, the first arm portion being free to flex torsionally about its axis when the load is applied to the second arm portion.
In an electronic weighing scale:
- a load receiving member, a load cell which provides an output signal corresponding to the load applied thereto, and a torsion member for transferring a load from the load receiving member to the load call and flexing torsionally to protect the load cell from shock loading and overloading of the platform.
Dependencies are inferred from the claim text.