Back to results
US 4,790,573 AGranted
Sealing system between a metal insert and plastic coupling, and resulting product
AssigneeTubos e Conexoes Tigre S/A
InventorDaniel A. Cardozo
Life of this patent
Estimating the term…
Abstract
Provision is made for installation, in the interior of a plastic coupling, of a cylindrical tubular-shaped metal insert with internal threads and having an externally knurled external flange at one end, followed by an intermediate section whereon external teethlike serrations or the like are provided, finally followed by a circumferential recess to house an elastic sealing ring, which insert is installed in the plastic coupling after the latter has been molded, and by embedding through transmission of pressure and heat.
Claims2
An improvement in a sealing system comprising:
- a plastic coupling;
- a metal insert being installed in the interior of said plastic coupling;
- said metal insert having a cylindrical tubular-shaped part with internal threads and having an externally knurled external flange at one end, followed by an intermediate section whereon external teethlike serrations are provided, and further followed by a circumferential recess;
- and an elastic sealing ring disposed in said recess.
1 more element
Dependencies are inferred from the claim text.