Plastic article or earthenware shaping or treating: apparatus – Female mold and charger to supply fluent stock under... – With means between charger and mold to cut off flow of...
Reexamination Certificate
2007-11-20
2007-11-20
Heitbrink, Tim (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
Female mold and charger to supply fluent stock under...
With means between charger and mold to cut off flow of...
C425S563000
Reexamination Certificate
active
10970636
ABSTRACT:
A check valve assembly for use in a plastic injection molding machine injection unit is disclosed. The check valve utilizes a free-floating poppet member which has tapered angularly spaced-apart tapered flutes on the outer surface thereof and a self-aligning spherical valve seating surface at one end thereof. When a predetermined shot volume in front of the check valve has been filled, forward advancement of the feed screw within the injection unit causes the molten thermoplastic material to grippingly engage the tapered surfaces of the flutes causing the poppet member to move along with the backflow of thermoplastic material closing the check valve.
REFERENCES:
patent: 2345917 (1944-04-01), Coffman
Heitbrink Tim
Hudak James A.
LandOfFree
Poppet valve assembly does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Poppet valve assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Poppet valve assembly will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3808308