# US 2013/0152298 A1 · Pool or spa drain cover > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0152298 A1 - Document ID: US20130152298A1 - Status: Published application - Kind: A1 - Application number: 13/716,121 - Filed: 2012-12-15 - Published: 2013-06-20 - Earliest claimed: 2011-12-16 - Inventors: Mick George LYRISTAKIS - Web page: https://patentgrep.com/patent/US20130152298A1 ## CPC - E04H 4/06: Safety devices; Coverings for baths - E04H 4/1236: {Bottom drains} - E04H: BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL (foundations E02D) ## Abstract A pool drain cover includes a center hub which can be rotated with respect to an outer portion. A twisting of the center hub causes multiple (e.g., three or more) engagement arm assemblies to extend such that their distal ends engage the inner surface of a pool drain pipe, thereby holding the pool drain cover in place. The distal ends of the engagement arms may be provided with an anti-slip coating such as, for example, vinyl, rubber, etc., and/or an anti-slip finish. Alternatively, a metal (e.g., stainless steel) tab extending from the distal end of each of the engagement arm assemblies can be provided. The engagement arm assemblies can be released by twisting the center hub in the opposite direction, thereby permitting the pool drain cover to be removed. ## Claims ### Claim 1 Apparatus for covering a drain having a circular inner diameter, the apparatus comprising: a) an outer drain cover having a central opening, a top side surface facing away from the drain, and a bottom side surface facing the drain; b) a center hub rotateably accommodated in the central opening of the outer drain cover, having a top side surface facing away from the drain, and having a bottom side surface facing the drain; and c) a plurality of engagement arm assemblies, each being rotateably coupled with the bottom side surface of the center hub, and slideably coupled with the bottom side surface of the outer drain cover. ### Claim 2 (depends on 1) The apparatus of claim 1 having a first state and a second state, wherein a distal end of each of the engagement arm assemblies extends further from the center hub in the second state than in the first state. ### Claim 3 (depends on 2) The apparatus of claim 2 wherein each of the engagement arm assemblies includes a biasing component which exerts a radially outward directed force on the slideable coupling with the bottom side surface of the outer drain cover when the apparatus is in the second state. ### Claim 4 (depends on 3) The apparatus of claim 3 wherein each of the biasing components is a helical spring. ### Claim 5 (depends on 1) The apparatus of claim 1 wherein each of the plurality of engagement arm assemblies includes a slot and wherein each of the plurality of engagement arm assemblies is slideably coupled with the bottom side surface of the outer drain cover with a component, the component being fixed to the bottom side surface of the outer drain cover and slideable within the slot. ### Claim 6 (depends on 1) The apparatus of claim 1 wherein a distal end surface of each of the plurality of engagement arm assemblies is provided with non-slip material. ### Claim 7 (depends on 1) The apparatus of claim 1 wherein a distal end surface of each of the plurality of engagement arm assemblies is roughened. ### Claim 8 (depends on 1) The apparatus of claim 1 wherein each of the plurality of engagement arm assemblies includes an arm body and a metal tab extending beyond a distal end of the arm body. ### Claim 9 (depends on 1) The apparatus of claim 1 wherein each of the plurality of engagement arm assemblies includes an arm body and a two-sided metal tab removably connected, off-center, with the arm body such that one of the sides of the metal tab extends beyond a distal end of the arm body. ### Claim 10 (depends on 1) The apparatus of claim 1 wherein the outer drain cover is made from a material selected from a group consisting of (A) PVC with ultraviolet ray (U.V.) inhibitors, (B) glass reinforced plastic (“GRFP”), (C) high-density polyethylene (“HDPE”), and (D) resin based composites. ### Claim 11 (depends on 1) The apparatus of claim 1 wherein the center hub is made from a material selected from a group consisting of (A) PVC with U.V. inhibitors, (B) glass reinforced plastic (“GRFP”), (C) high-density polyethylene (“HDPE”), and (D) resin based composites. ### Claim 12 (depends on 1) The apparatus of claim 1 wherein each of the plurality of engagement arm assemblies includes an arm body made from a material selected from a group consisting of (A) PVC with U.V. inhibitors, (B) glass reinforced plastic (“GRFP”), (C) high-density polyethylene (“HDPE”), and (D) resin based composites. ### Claim 13 (depends on 1) The apparatus of claim 1 wherein both the outer drain cover and the center hub are provided with components to limit the degree of rotation of the center hub with respect to the outer drain cover. ### Claim 14 (depends on 1) The apparatus of claim 1 wherein the center hub includes an engagement hole for receiving a torque providing tool. ### Claim 15 (depends on 14) The apparatus of claim 14 wherein the engagement hole has a profile including vertices. ### Claim 16 (depends on 15) The apparatus of claim 15 wherein the engagement hole has a pointed star profile. ### Claim 17 (depends on 14) The apparatus of claim 14 wherein the engagement hole has a profile with rounded edges. ### Claim 18 (depends on 17) The apparatus of claim 17 wherein the profile of the engagement hole has no vertices. ### Claim 19 (depends on 1) The apparatus of claim 1 wherein the top side surface of the outer drain cover has a concave cross-sectional profile. ### Claim 20 (depends on 1) The apparatus of claim 1 wherein the top side surface of the outer drain cover has a convex cross-sectional profile.