Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Precision material filling systems










Image Number 2 for United States Patent #4450981.

The filling systems according to the invention utilize pneumatic pressure maintained within closely held tolerance limits to impose a constant dispensing force upon the material being dispensed. The invention in one embodiment utilizes a buffer tank system in which the product to be dispensed is transferred from a supply tank (11) to the buffer tank (12) where the desired pressure is induced through a pneumatic head which is introduced above the product level. The product level in the buffer tank (12) is allowed to fluctuate within a relatively narrow band of depth so as to negate the effect of changes in gravity head pressure. The closed and pressurized system is refilled by forcing the incoming product into the tank (12) under a higher pressure than that in the buffer tank (12). The air within the tank (12) that is displaced as a result of introducing the new product is automatically vented to atmosphere through a precision regulation system (45).The pressure balancing system incorporates either a piston or diaphragm balancing member controller device (81) which controls a three-way pneumatic valve (72) for charging or venting the dispensing tank (58). The desired product set point pressure is applied to one side of the balancing member (80) and the actual product pressure is applied to the other side. As the level in the tank (58) drops, the gravity head pressure drops, and this is sensed at the bottom of the tank. The balancing member (80) favors the side with the lower pressure causing the three-way valve (72) to open and pneumatically charge the tank (58) until the set point pressure and the actual prodcut pressure are equal. If the actual product pressure becomes greater than the set point pressure (72) to exhaust the excess pressure to atmosphere. The response time and sensitivity of the system are adjusted by a flow control valve (68) in the charging circuit, and by increasing or decreasing the pressure differential between the charging pressure and the set point pressure.








 
 
  Recently Added Patents
Gaze tracking password input method and device utilizing the same
Dithering method and apparatus
Providing a feedback loop in a low latency serial interconnect architecture
Sense-amplifier monotizer
Rain barrel
Belt with light
Probe for ultrasound diagnostic apparatus
  Randomly Featured Patents
Pressure mapping system with capacitive measuring pad
Vehicular upholstery polypropyleneterephthalate fiber fabric
Organic emissions elimination apparatus and process for same
System and method for asynchronous mirroring of snapshots at a destination using a purgatory directory and inode mapping
Weight for vibration motor
Image coding method and apparatus using spatial predictive coding of chrominance and image decoding method and apparatus
Confined plasma resonance antenna and plasma resonance antenna array
Self-scanned photodiode array with selectively-skipped pixels
Wide viewing angle liquid crystal display panel
Record material and marking liquid