Patent ID: 7854029
Filing Date: 2010-12-21
Classification: E03C

Abstract:
1. A water drain assembly, comprising: an embedding ring, made of a low-priced plastic, an external diameter thereof matching a hole diameter of a drain through hole, and a top thereof being slightly larger than a blocking ring edge, such that the drain through hole limits its position when the embedding ring is installed into the drain through hole, the embedding ring having a predetermined quantity of hooks extending inwardly from a bottom thereof and having a gap between two adjacent ones of the hooks, and an external circumference of the embedding ring being tapered from a top of the gap, such that a structure at the hooks is thinner and weaker to provide a better deformation rate; a water drain body, with an external diameter thereof matching an internal diameter of the embedding ring, and a top thereof being large enough to cover a ring plate at the blocking ring edge of the embedding ring, having a circular slanting push portion disposed slantingly inward at a bottom of the water drain body, such that a through hole formed by the circular slanting push portion is slightly larger than an external diameter of a corresponding drainage pipe; a seal washer, made of a rubber material, and having a ring embedding edge disposed around an internal circumference of the seal washer, such that the embedding ring is sheathed into the seal washer, and the blocking ring edge at the top of the embedding ring is stopped and limited at a top of the ring embedding edge, so that the seal washer serves as a water stop interface among the embedding ring, the water drain body and the drain through hole to achieve an seal anti-leakage effect; a seal ring, made of a rubber material, and having an external diameter matching an internal diameter of the water drain body, and a blocking ring disposed around an internal circumference of the seal ring, such that a cross-section of the blocking ring is equal to that of the corresponding drainage pipe, and a top of the corresponding drainage pipe is assembled easily during its installation; a pressing member, with an external circumference thereof tightly coupled with an internal circumference of the water drain body, and having a guiding net extended from a lower edge of the pressing member, the guiding net being formed by intersecting a plurality of strip plates extending from the pressing member, having a straight and flat section, and a lower section in a curved shape, the depth of the straight and flat section of the guiding net being greater than a thickness of the seal ring, and an external diameter of the straight and flat section of the guiding net being slightly smaller than an internal diameter of the corresponding drainage pipe, so that the guiding net concurrently has the functions of guiding the corresponding drainage pipe into a proper position and filtering hairs; a jam-on member, with a top having a dimension slightly larger than a stop ring at an internal hole of the water drain body, for preventing the jam-on member from being sheathed completely into the internal hole of the water drain body, having a pipe pressing portion with an external diameter thereof being slightly smaller than the internal diameter of the water drain body, and a length D of the pipe pressing portion is at least greater than a depth A of the internal hole of the water drain body minus a thickness B of the seal ring and plus a thickness C of the pressing member (D>A−B+C); and a strainer, embedded onto the top of the water drain body and having a plurality of drain holes disposed thereon.