An apparatus including a storage tank, a frame positioned at least partially beneath the storage tank, a lever having a first end and a second end pivotally mounted to the frame, a scale system positioned beneath the storage tank, wherein in a first position, the storage tank exerts a force against the scale system, and in a second position, the second end of the lever exerts a force on a bottom of the storage tank such that the storage tank is positioned above, and out of contact with, the scale system.

Provided is an overload prevention mechanism having a structure that protects a weight sensor with a floating action and ensuring the reproducibility of the return position of the weight sensor. The overload prevention mechanism has a resilient member that is interposed between the weight sensor and the case, supports the weight sensor in a pressing manner against the case, and when a certain plate load or greater is imposed causes the weight sensor to separate from the case and thereby be released from the load, a guide member that is arranged in a standing manner between the weight sensor and the case, and a guide receiving seat that is provided in the weight sensor or the case and engages with the guide member.

Provided is an overload prevention mechanism having a structure that protects a weight sensor with a floating action and ensuring the reproducibility of the return position of the weight sensor. The overload prevention mechanism has a resilient member that is interposed between the weight sensor and the case, supports the weight sensor in a pressing manner against the case, and when a certain plate load or greater is imposed causes the weight sensor to separate from the case and thereby be released from the load, a guide member that is arranged in a standing manner between the weight sensor and the case, and a guide receiving seat that is provided in the weight sensor or the case and engages with the guide member.

A system to monitor weight of a reservoir or a structure comprises a load cell which comprises an electrical or optical transducer to provide a proportional signal of the deformation, a load cell base support for holding the load cell on the ground substantially about the axis of the support element of the reservoir, a load cell support adapter to attach the loadcell to the support member of the reservoir. The cell support adapter may comprise an opening or a shouldering anchor aiming at facilitating attachment to a temporary lifting device.

A system to monitor weight of a reservoir or a structure comprises a load cell which comprises an electrical or optical transducer to provide a proportional signal of the deformation, a load cell base support for holding the load cell on the ground substantially about the axis of the support element of the reservoir, a load cell support adapter to attach the loadcell to the support member of the reservoir. The cell support adapter may comprise an opening or a shouldering anchor aiming at facilitating attachment to a temporary lifting device.

A weighing device is disclosed which includes a chassis, a load cell, and a weighing pan functionally coupled to the load cell. The weighing device includes a locking device adapted and configured to selectively fix the weighing pan relative to the chassis of the weighing device. The locking device may be used to fix the weighing pan relative to the chassis of the weighing device prior to placing objects onto the weighing pan and prior to removing objects from the weighing pan, so as to inhibit inducing swings of the weighing pan, impulses and shocks on the load cell, and other detrimental effects by loading and unloading the weighing pan. A system comprising the weighing device and a method for weight determination are further disclosed.

Provided is a mass sensor including a four-corner-adjusting-mechanism capable of reducing the sensitivity of four-corner adjustment without reducing the rigidity of a Roberval mechanism. A mass sensor (1) includes a Roberval mechanism (2) in which a floating frame (21) and a fixing frame (22) are connected by upper and lower sub-frames (23, 24) having thin portions (23b) formed thereon, and a four-corner-adjusting-mechanism (4) to perform parallelism adjustment. The four-corner-adjusting-mechanism (4) includes an adjusting screw (41), and an upper elastic member (42u) and a lower elastic member (42d) disposed in series in the vertical direction so as to sandwich the sub-frame (23) to be subjected to parallelism adjustment.

A load detecting apparatus includes a load input portion, a strain body including an annular portion provided with a contact portion being in contact with at least a part of the output surface, the strain body including a support portion supporting the annular portion so as to be swingable, a swing portion swinging in accordance with an input of a load, an extending portion being continuously provided with the swing portion and extending from the support portion, a sensor being disposed at a back surface of a surface in which the contact portion is provided; and a restriction portion being formed at a base end portion of the extending portion relative to the contact portion, the restriction portion restricting a deformation of the annular portion beyond a predetermined value in a case where the load inputted to the load input portion is greater than a preset load.

A load detecting apparatus includes a load input portion, a strain body including an annular portion provided with a contact portion being in contact with at least a part of the output surface, the strain body including a support portion supporting the annular portion so as to be swingable, a swing portion swinging in accordance with an input of a load, an extending portion being continuously provided with the swing portion and extending from the support portion, a sensor being disposed at a back surface of a surface in which the contact portion is provided; and a restriction portion being formed at a base end portion of the extending portion relative to the contact portion, the restriction portion restricting a deformation of the annular portion beyond a predetermined value in a case where the load inputted to the load input portion is greater than a preset load.

Provided is an overload prevention mechanism having a structure that protects a weight sensor with a floating action and ensuring the reproducibility of the return position of the weight sensor. The overload prevention mechanism has a resilient member that is interposed between the weight sensor and the case, supports the weight sensor in a pressing manner against the case, and when a certain plate load or greater is imposed causes the weight sensor to separate from the case and thereby be released from the load, a guide member that is arranged in a standing manner between the weight sensor and the case, and a guide receiving seat that is provided in the weight sensor or the case and engages with the guide member.