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
Automated processing machine used for processing samples placed on slides and having an output device
Satellite fleet deployment
Representing polarized light in computer models
Method for designing sunlight-reflection and heat-radiation multilayer film
Defect inspection method and device therefor
Method for fabrication of a semiconductor device and structure
Spatula
  Randomly Featured Patents
Fuel injector armature permitting fluid and vapor flow
Articulating clam type grapple for a backhoe
Methods and systems for automated processing of fallout orders
Fiddle stick
Method for fabricating a semiconductor device
Method of driving matrix type display apparatus, display apparatus and electronic equipment
Method and apparatus for producing 360 degree radiation with static components
Single mask lithographic process for patterning multiple types of surface features
Straight line mechanism
Control and power device for a rotating electrical machine