US 4,230,196 A · Load weighing and accumulating system and method for hydraulic loader

Abstract

A loader includes a lift arm assembly, raised by hydraulic lift cylinders and carrying a load bucket. Alignment members mounted respectively on the loader frame and lift arm assembly, and visible to the loader operator, identify the weigh position of the lift arm assembly. A pressure to voltage transducer is mounted on one lift cylinder, and is connected in a bridge circuit producing a DC voltage output. The bridge circuit output signal, proportional to the bucket load, is fed to an amplifier, whose output is passed to an analog-to-frequency converter producing pulses at a frequency proportional to the bucket load. An electronic clock allows the converter output pulses to pass through an AND gate to a bucket counter which displays the bucket load, and is automatically reset to zero. The converter pulses are passed to an accumulator counter through a second AND gate. The accumulator counter accumulates the weight of several bucket loads which are loaded onto a transport vehicle; and is reset manually after the vehicle is loaded.

Claims30

Dependent claims

A weight measuring and indicating system, for a loader having at least one hydraulic lift cylinder for elevating a load carrier, comprising

a transducer, for operative connection to said lift cylinder, for detecting instantaneous hydraulic pressure therein and for producing an instantaneous electric analog signal responsive to the instantaneous hydraulic pressure;
converter means coupled to the output of said transducer means for converting said analog signal to a frequency signal consisting of pulses generated at a frequency proportional to said analog signal;
a counter for counting and displaying the ouput pulses of said converter;
control gate means coupling said counter to said converter;
and clock means coupled to said gate means, for controlling the passing of converter output pulses to said counter whereby said counter display will be representative of the load in said carrier.

2 more elements

A loading vehicle and associated weighing system for measured delivery of bulk material, comprising in combination

a loading vehicle comprising a frame;
a load carrier;
means for supporting said load carrier relative to said frame;
and at least one hydraulic lift cylinder for lifting and lowering said supporting means and said load carrier relative to said frame;
weighing means comprising a transducer operatively connected to said lift cylinder, for detecting instantaneous hydraulic pressure therein and for producing an electric analog signal responsive to the instantaneous hydraulic pressure;
said weighing means further comprising means for converting said analog signal to a frequency signal consisting of pulses generated at a frequency proportional to said analog signal;
and means for counting said pulses for a selected time interval to determine the load carried in said carrying means.

4 more elements

Dependencies are inferred from the claim text.

Load weighing and accumulating system and method for hydraulic loader

Life of this patent

Load weighing and accumulating system and method for hydraulic loader

Life of this patent

Abstract

Claims30