Load sensor
AssigneeRotec Industries, Inc.
InventorsRobert F. Oury, Charles J. Arndt
Life of this patent
Estimating the term…
Abstract
A load sensor for a concrete conveyor having a tremie which sounds a signal and releases the tremie in case the tremie becomes overloaded. The device has a U-shaped deflection yoke between the tremie and the conveyor which deflects under the weight of the tremie to close switches and actuate the appropriate safety device. All parts are protected from concrete to insure proper functioning.
Claims9
In an elevated concrete-placing conveyor feeding into a tremie detachably secured to the end of the conveyor, a device for automatically preventing concrete overload in the tremie comprising
- means interposed between the tremie and the end of the conveyor which distends as the weight of the tremie increases;
- said means comprising a U-shaped beam having one leg thereof connecting through link means to the end of the conveyor and the other leg thereof connecting through link means to the tremie,
- a first pair of opposed, spaced contacts mounted on said distending means connecting with a circuit to a first-alarm means and to a circuit supplying power to said conveyor,
- a second pair of opposed, spaced contacts mounted on said distending means and connecting to a circuit which supplies power to means for detaching said tremie from said conveyor,
- whereby as the weight of the tremie increases to a first predetermined quantity, the first pair of contacts engage to actuate the alarm and stop the conveyor, and as the weight to the tremie increases to a second predetermined quantity, the second pair of contacts engage to detach the tremie.
In an elevated concrete placing conveyor, a funnel suspended from the end of said conveyor, a tremie detachably secured to the lower end of said funnel by link means, weight-sensing means comprising a U-shaped beam having one leg connecting to said lower end, and the other end connecting to said tremie, trigger means for opening said link means to detach said tremie, and means responsive to the distension of said legs due to weight in said tremie to actuate said trigger.
Dependencies are inferred from the claim text.