# US 7,454,802 B2 · Drain system for tub > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,454,802 B2 - Document ID: US7454802B2 - Status: Granted - Kind: B2 - Application number: 10/978,656 - Filed: 2004-11-01 - Published: 2006-05-04 - Granted: 2008-11-25 - Earliest claimed: 2004-11-01 - Assignees: Acryline USA, Inc. - Inventors: Scott Tennant; Steve Deland - Web page: https://patentgrep.com/patent/US7454802B2 ## CPC - A61H 33/00: Bathing devices for special therapeutic or hygienic purposes (A61H35/00 takes precedence; {sprays acting on a body or body part not immersed in water A61H9/00; means for washing bed-ridden persons A61G7/0005;} for sub aquatic intestinal cleaning A61M9/00; {isolation chambers A61M21/0094; } electric or magnetic baths, applying ionised fluids A61N1/44 {; heater for bath tubs F24H1/54}) - A61H 33/60: {Components specifically designed for the therapeutic baths of groups A61H33/00 (plumbing E03C1/00)} - A61H 33/6068: {Outlet from the bath} - E03C 1/22: Outlet devices mounted in basins, baths, or sinks (stoppers A47K1/14) - A61H 2033/002: {by blowing air through the installation after the bath has been emptied} - A61H 2033/0025: {by connecting the air lines with the drain} - A61H: PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY (electrotherapy, magnetotherapy, radiation therapy or ultrasound therapy A61N) - E03C: DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER (not connected to either water-supply main or to waste pipe A47K; devices of the kind used in the ground E03B, E03F); SINKS ## Abstract An air massage bathtub is disclosed. The air massage bathtub includes a bath well defined by side walls and a bottom portion. The bottom portion includes a recessed area with a drain located within to the recessed area. The bathtub further includes a channel located at least partially below said bath well and in communication with the recessed area, and a plurality of apertures each of which extends through the bath well and into the channel. ## Claims ### Claim 1 A bathtub comprising: a bath well defined by side walls and a bottom portion, said bottom portion including a recessed area extending below and surrounded by said bottom portion; a drain located within the recessed area; a channel located above said bottom portion and extending substantially around said bath well, said channel disposed outside of said bath well; a channel extension arranged between said channel and the recessed area such that said channel is in communication with the recessed area; and a plurality of first apertures in said bath well, at least some of said first apertures extending into said channel. ### Claim 2 (depends on 1) The bathtub according to claim 1, wherein at least a portion of said channel is tilted towards the recessed area. ### Claim 3 (depends on 1) The bathtub according to claim 1, wherein a portion of said channel extends at least partially around the recessed area. ### Claim 4 (depends on 1) The bathtub according to claim 1, further comprising at least one second aperture in the recessed area in communication with said channel extension, said at least one second aperture allowing fluid located within said channel to drain into said drain. ### Claim 5 (depends on 1) The bathtub according to claim 1, further comprising a blower or compressed air source for forcing air through said first apertures. ### Claim 6 (depends on 5) The bathtub according to claim 5, further comprising a heater for heating said air. ### Claim 7 (depends on 6) The bathtub according to claim 6, wherein the blower or compressed air source is in fluid communication with said channel. ### Claim 8 (depends on 1) The bathtub according to claim 1, further comprising a waste water pipe connected to said drain. ### Claim 9 (depends on 1) The bathtub according to claim 1, wherein said first apertures are located on said side walls. ### Claim 10 (depends on 1) The bathtub according to claim 1, wherein said channel is continuous. ### Claim 11 (depends on 10) The bathtub according to claim 10 wherein said channel includes a connection to a blower. ### Claim 12 (depends on 1) The bathtub according to claim 1, wherein said channel allows fluid located in said channel to drain through said channel extension and into the recessed area. ### Claim 13 (depends on 12) The bathtub according to claim 12 wherein said channel provides a drainage percentage of greater than 97%. ### Claim 14 A bathtub comprising: a bath well defined by side walls and a bottom portion, said bottom portion including a recessed area extending below and surrounded by said bottom portion; a drain located within the recessed area; a channel located above said bottom portion and extending around said bath well, said channel disposed outside of said bath well; a channel extension arranged between said channel and the recessed area such that said channel is in communication with the recessed area; a plurality of first apertures in said bath well, at least some of said first apertures extending into said channel; and a blower for forcing air into said channel and through said first apertures. ### Claim 15 (depends on 14) The bathtub according to claim 14 wherein said channel is tilted towards said recessed area. ### Claim 16 (depends on 14) The bathtub according to claim 14 wherein a portion of said channel extends at least partially around the recessed area. ### Claim 17 (depends on 14) The bathtub according to claim 14 further comprising at least one second aperture in the recessed area in communication with said channel extension, said at least one second aperture allowing fluid located within said channel to drain into said drain. ### Claim 18 (depends on 14) The bathtub according to claim 14 further comprising a heater for heating said air. ### Claim 19 (depends on 14) The bathtub according to claim 14 further comprising a waste water pipe connected to said drain. ### Claim 20 (depends on 14) The bathtub according to claim 14 wherein said channel is continuous. ### Claim 21 (depends on 14) The bathtub according to claim 14 wherein said first apertures are located on said side walls. ### Claim 22 (depends on 14) The bathtub according to claim 14 wherein said channel provides a drainage percentage of greater than 97%. ### Claim 23 A bathtub comprising: a bath well defined by side walls and a bottom portion, said bottom portion including a recessed area extending below and surrounded by said bottom portion; a drain located within the recessed area; a channel located above said bottom portion and extending around said bath well; a channel extension arranged between said channel and the recessed area such that said channel is in communication with the recessed area; a plurality of first apertures located on said side walls of said bath well, at least some of said first apertures extending into said channel; and at least one second aperture in the recessed area in communication with said channel extension, said at least one second aperture allowing fluid located within said channel to drain into said drain. ### Claim 24 (depends on 23) The bathtub according to claim 23 wherein said channel is tilted towards the recessed area. ### Claim 25 (depends on 23) The bathtub according to claim 23 further comprising a waste water pipe connected to said drain. ### Claim 26 (depends on 23) The bathtub according to claim 23 wherein said channel is continuous. ### Claim 27 (depends on 23) The bathtub according to claim 23 wherein said channel provides a drainage percentage of greater than 97%. ### Claim 28 (depends on 23) The bathtub according to claim 23 further comprising a blower for forcing air into said channel and through said first apertures. ### Claim 29 (depends on 28) The bathtub according to claim 28 further comprising a heater for heating said air.