Patent ID: 6378269
Filing Date: 2002-04-30
Classification: E03F,E04G,F16L,Y02A

Abstract:
An adjustable form intended for use during the pouring of concrete about an upright hub type drain with a drain collar seated in the top end possessing a top surface, a periphery, and an internally threaded bore, said form comprising:a substantially rigid plate possessing a lower surface, an upper surface and a periphery, a cylinder possessing external threading extending upward from a lower end mating an internally threaded bore of a drain collar, a compressible gasket, and attachment means for securing said plate to a top end of said cylinder; said lower end of said cylinder being threadable into an internally threaded bore of said drain collar seated in the top end of an upright hub drain and given an upright disposition by which the top end of said cylinder is elevationally adjustable with rotation of said cylinder in engagement with said internally threaded bore of said drain collar; said rigid plate being attachable to the top end of said cylinder in a substantially perpendicular disposition with relation to said cylinder by said attachment means which secure said plate to said top end of said cylinder; said gasket being disposed in contact with said lower surface of said plate and being compressible against a top surface of a drain collar seated in the top end of an upright hub drain with attachment of said plate to said top end of said cylinder utilizing said attachment means; whereby pouring of a slab of concrete about a drain hub having a drain collar seated in the top end with said gasket compressed between the top surface of the drain collar and the bottom surface of said plate secured to the top end of said cylinder threaded into the internally threaded bore of the drain collar preserves a void about and above the hub drain which is provides for sloping of the finished cement floor and which does not extend below the top end of the upright hub drain, thereby preserving the integrity of the concrete slab.