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
Discreet packaging for personal care products
Bump structure including nano-wires and a body connecting ends of the nano-wires, semiconductor package having the bump structure and method of manufacturing the semiconductor package
Superconducting rotating electrical machine and stator for use with superconducting rotating electrical machine
Cross product/service management
Microwave interactive flexible packaging
Two-pass decoding for speech recognition of search and action requests
Light-emitting element and display device
  Randomly Featured Patents
Interchangeable hypodermic needle assemblage
Inflatable cushion
Imaging device, imaging method, and imaging system
Welding outlet
Process and apparatus for the quantitative determination of cations or anions by ion chromatography
Permanent magnet rotating electric machine and electrically driven vehicle employing same
System for adjusting the pressure of a head on an information storage medium of a disk device
Multiple-CPU portable terminal with communication function and control method
Advanced materials for regenerative pyrolysis reactors, methods, and reactors using the same
Connector and receptacle containing a physical security feature