EP0437048A2 - Appareil pour l'hydromassage et dispositif à clapet anti-retour pour ledit appareil - Google Patents

Appareil pour l'hydromassage et dispositif à clapet anti-retour pour ledit appareil Download PDF

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Publication number
EP0437048A2
EP0437048A2 EP90313440A EP90313440A EP0437048A2 EP 0437048 A2 EP0437048 A2 EP 0437048A2 EP 90313440 A EP90313440 A EP 90313440A EP 90313440 A EP90313440 A EP 90313440A EP 0437048 A2 EP0437048 A2 EP 0437048A2
Authority
EP
European Patent Office
Prior art keywords
casing
check valve
outlet
section
orifice
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP90313440A
Other languages
German (de)
English (en)
Other versions
EP0437048A3 (fr
Inventor
Benoît Renaud
Paul Isabelle
Aldo Balatti
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CA 2005276 external-priority patent/CA2005276A1/fr
Priority claimed from CA 2018117 external-priority patent/CA2018117A1/fr
Application filed by Individual filed Critical Individual
Publication of EP0437048A2 publication Critical patent/EP0437048A2/fr
Publication of EP0437048A3 publication Critical patent/EP0437048A3/fr
Withdrawn legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • 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
    • A61H33/00—Bathing devices for special therapeutic or hygienic purposes
    • A61H33/02—Bathing devices for use with gas-containing liquid, or liquid in which gas is led or generated, e.g. carbon dioxide baths
    • A61H33/026—Gas nozzles specially adapted therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • 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
    • A61H33/00—Bathing devices for special therapeutic or hygienic purposes
    • A61H33/60—Components specifically designed for the therapeutic baths of groups A61H33/00

Definitions

  • the present invention relates to an improvement in jet bath massaging or hydromassaging apparatus (especially therapeutic bath) which is provided with a plurality of openings positionned below a level of water.
  • the invention also relates to check valves adapted to embody such an improved apparatus.
  • a hydromassaging apparatus comprising in combination a tub, compressed air supply means located adjacent the tub, longitudinally extending air distribution duct means secured to the outside surface of the tub, the duct means also comprising air distribution branches and a plurality of small apertures extending through the tub from the air distribution ducts means, the apertures being evenly spaced apart.
  • 4,525,881 consists of a cup-shaped cylindrical element concentrically suspended within a cylindrical chamber provided with an air inlet, a water inlet and an outlet for air and water, the element being provided at one end with a rubber disc and being allowed to slide, according to a differential of pressure between the water in the chamber and the atmospheric pressure from a position where the disc abuts with the air inlet (valve is closed) to a position where the disc is move away from said air inlet (valve is open) so as to allow a blend of air and water flowing toward the outlet.
  • ducts are designed to be emptied by gravity and then dried by a flow of air circulating therein. There is no means to keep the ducts dry except a special and tedious process for drying the ducts.
  • tubs, spas or pools of U.S. Pat. no. 4 525 881 there is an air check valve preventing water of tubs, spas or pools from entering the piping that is normally used for introducing a pressurized flow of air and water in tubs, spas or pools.
  • this valve always needs the simultaneous use of water and air and would not efficiency work with water or air alone.
  • a first object of the present invention relates to an apparatus which overcomes the aforesaids drawbacks. More particularly, the first object relates to a jet bath massaging or hydromassaging apparatus in which introduction of water toward duct means of the apparatus is prevented in order to keep dry the duct means and thus minimize the risk of having a growth of bacteria and/or fungi therein.
  • Another object of the invention relates to a hydromassaging apparatus (such as a therapeutic bath) of the type comprising:
  • Another object of the invention is to provide an improved hydromassing apparatus which results from the mere positionning of a simple and inexpensive check valve across each openings of a hydromassaging apparatus. (example: a hydromassaging apparatus already in use.)
  • a further object of the invention relates to a check valve assembly which is intended to be positionned across one corresponding opening (especially a side opening) of a hydromassaging apparatus in order (when all openings are each associated with such a check valve) to bring an improvement in a hydromassaging apparatus by preventing any introduction of water contained in the tub toward its ducts means.
  • a particularly preferred object of the invention relates to a check valve which:
  • a still further object of the invention is to provide a check valve assembly that is simple, inexpensive and very easy to mount across a corresponding opening (especially a side opening) of a hydromassaging apparatus, preferably without having to make any modifications to said apparatus.
  • the hydromassaging apparatus (such as a therapeutic bath) comprises:
  • the invention relates to a check valve which is intended to be mounted across a corresponding opening of a hydromassaging apparatus of the type comprising:
  • Such a check valve comprises a casing having opposite ends and being provided with a longitudinal axis, at least one longitudinal outer surface, an inlet at one end of said casing, said inlet being intended to be put in fluid communication with said duct means, an outlet at the opposite end of said casing, said outlet being intended to be put in fluid communication with an interior of the tub, a conduit extending from said inlet to said outlet and means including at least one membrane and being adapted to react to a differential of pressure existing between opposite faces of said membrane and move it either to an open position which allow a fluid communication from the inlet to the outlet, or to a closed position which prevent any fluid communication from the outlet to the inlet, said casing being further provided with means adapted for axially setting and fastening said check valve to seal a corresponding opening of the tub.
  • the casing of the aforesaid check valve is intended to be axially set and fastened in such a way, according to its longitudinal axis, through a corresponding opening of the tub, that when a check valve is mounted through each openings of said wall, for each check valve, the closure of said means including at least one membrane is achieved when the pressure applied by the water of the tub against one face of the membrane is higher than the pressure applied by the air on the opposite face of this membrane (i.e. check valve closed), and its opening is achieved when the pressure applied by the pressurized flow of air against one face of the membrane is higher than the pressure applied by the water of the tub against the opposite face of this membrane (i.e. check valve open).
  • a check valve comprises:
  • the casing of the aforesaid preferred check valve is intended to be axially set and fastened in such a way, according to its longitudinal axis, through a corresponding opening of the tub that said flap and seat are substantially inclined with respect to the horizontal and have their lower portion closer of the outlet of the casing.
  • said flap can completly cover the flap seat and the orifice when the pressure applied by the water of the tub against one face of the flap is higher than the pressure applied by the air on the opposite face of this flap (i.e.
  • the invention relates to an improved hydromassaging apparatus in which an above mentionned preferred check valve is mounted across each openings of side walls of the tub.
  • a check valve may comprise:
  • the invention relates to an improved hydromassaging apparatus of the type comprising: a tub having a bottom wall and side walls and being intended to be filled with water to a determined level, at least one of said side walls being provided with openings below said determined level of water; generation means adapted to generate a flow of pressurized air; duct means positioned in fluid communication between said openings and generation means so that said flow can circulate from said generation means through said duct means and openings, and then bubble in water; and a check valve mounted across each of said openings, each check valve being the preferred variant of a check valve which is described hereinbefore.
  • a therapeutic bath “ B” in which an improvement according to the invention can be made comprises, as illustrated in FIGS 1 and 2, a tub having a bottom 1, opposite side walls 5 provided with a plurality of evenly spaced openings 9, opposite side walls 7, ducts 11 and means adapted to generate a flow of pressurized air, circulate it through saids ducts 11 and openings 9 and then bubble it (under jet form) in water "W".
  • the tub is filled with water “W” to a level “L”. In use, this level "L" is always above openings 9.
  • openings 9 may be advantageoulsy positionned in walls 5 close to bottom 1, so as to maximize the distance between said openings and the level “L” and thus increase the path of bubbles across water “W” to thereby increase movement of water "W” generated by said bubbles.
  • means adapted to generate a flow of pressurized air may consist of a fan 13 operated by an electric motor and provided with an outlet 15 which is put in fluid communication with ducts 11 by any appropriate means well known to one skilled in the art. (e.g. pipe fitting, etc).
  • walls 5 and 7 consist of a sheet 6 (made of metal (such as steel), plastic or fiber glass) and one layer 8 of an appropriate coating (such as enamel, acrylic, gel coal, etc).
  • ducts 11 may be made with a sheet of metal (such as steel),plastic or fiber glass.
  • a portion of ducts 11 is integral with sheet 6.
  • the improvement to this bath “B” may consist of a check valve “CV” (or “CV′”) as shown in FIGS 3 to 14, mounted across each opening 9 in order to allow a pressurized flow of air generated by the fan 13 to circulate successively through said ducts 11 and through said check valve “CV” (or “CV′”) mounted through said openings 9, and then to bubble in water “W", and, when the fan 13 is stopped, to prevent any introduction of water “W” toward said ducts 11.
  • the use of check valve “CV” (or “CV′”) allow to keep dry ducts 11 and thus prevent any growth of bacteria and/or fungi therein.
  • check valve "CV" shown in FIGS 3 to 12 comprises a casing 31 provided with:
  • casing 31 has a circular cross section according to a plane perpendicular to its longitudinal axis, and, as shown in FIGS 3 to 5, comprises partition having a lower section 63 which is inclined with respect to the longitudinal axis of the casing, and having an upper section 61 which is perpendicular with the longitudinal axis of said casing.
  • the upper section 61 is preferably provided with a bore having two coaxial segments of differential cross section.
  • An orifice 53 is provided in section 63.
  • the orifice 53 has its longitudinal axis parallel with the longitudinal axis of the casing 31.
  • the upper section 61 makes an integral part with a protuberance 65 which is intended to locally increase the thickness of section 61.
  • a bore is provided through saids section 61 and protuberance 65.
  • This bore has its longitudinal axis parallel with the longitudinal axis of casing 31 and presents two distincts segments 79 and 81.
  • Segment 79 has a square cross section and segment 81 has a circular cross section.
  • Segment 81 is also provided, as shown in FIGS 3 to 5 and 8 to 12 with a protuberance 83.
  • means for axially setting and fastening casing 31 of check valve "CV" to seal a corresponding opening 9 may consist of:
  • Casing 31, collar 71, partition 51 and protuberance 65 are advantageoulsy integral to each other and are preferably made with an appropriate plastic material. (They may be manufactured by usual moulding technics)
  • An example of a preferred plastic material is SANTOPRENE (trade mark), especially SANTOPRENE having a shore "A" durometer value ranging from 82 to 92 (i.e. 87 ⁇ 5).
  • means including a membrane may consist, advantageously, of a membrane 55 made of elastomeric material. (They may be manufactured by usual moulding technics)
  • elastomeric material is a silicone rubber, especially a silicone rubber having a Shore "A" durometer value ranging from 3 7 to 4 3 (i. e. 40 ⁇ 3)
  • This membrane has opposite faces and is provided with a lower segment defining a flap 91 and an upper segment 92 whose one face makes an integral part with one end of plug 93 also made of elastomeric material.
  • plug 93 which defines a barbed plug, comprises three distintives sections 95, 97 and 99 which integrally extend each other along the longitudinal axis of said plug 93.
  • Section 95 defines a head for said plug, has opposite ends and has one of its ends integral with a corresponding portion of one face of the upper segment 92.
  • this section 95 may be provided with means adapted to prevent any axial rotation of plug 93 along to its longitudinal axis.
  • such means is achieved when section 95 is of such size and geometry that it can fit tight inside bore segment 79 having a square cross section.
  • Section 97 defines a central body for said plug and has a cross section smaller than the one of section 95. This section 97 has opposite ends and such size and geometry that it can fit tight in the bore section 81.
  • Section 99 defines a tail for said plug and comprises three distinctives segments 100, 101 and 102 which integrally extend each other along the longitudinal axis of said section 99.
  • Section 100 has opposite ends, has a cross section that is larger than the one of section 97 and has one of its end integral with a corresponding end of section 97.
  • Section 101 has a conical outer surface whose larger cross section is equal to the cross section of segment 100.
  • Segment 102 has a slight conical surface whose larger cross section is equal to the smaller cross section of segment 101.
  • the smaller cross section of segment 102 may be slightly smaller than the cross section of section 97.
  • Section 97 defines a groove between radial walls 96 and 98 of sections 95 and 100.
  • sections 95 and 99 each defines a stopper (or barb) for axially setting and fixing the plug 93 in section 61 and positionning flap 91 in such a way, inside conduit 41 that, as shown in FIG 12, when the check valve "CV" is closed, flap 91 covers orifice 53 and rests against a corresponding portion of section 63 of the partition, said corresponding portion of section 63 defining a flap seat.
  • flap 91 can be bent toward the outlet 35 and raised above orifice 53 and flap seat.
  • check valve “CV′” shown in FIGS 13 and 14 is similar to check valve “CV” except the following alternatives particulars:
  • a preferred improved therapeutic bath which is defined by the combination of a bath "B" as shown in FIGS 1 and 2 with a check valve “CV” as shown in FIGS 12 mounted through each of its openings 9, works as follows:
  • the tub of bath “B” is filled with water by any appropriate means well known to one skilled in the art (e.g. faucets 112 shown in FIG 1) to a level “L” which is set above saids check valves "CV”. Then, for each check valve "CV", water “W” applies a pressure against one face of flap 91 and press it against the flap seat defined by a portion of wall 63 surrounding orifice 53 and cover said orifice 53 in order to close the check valve "CV” and prevent any flow of water "W” from the outlet 35 toward the inlet 33. Thus, ducts 11 are kept dry.
  • each flap 91 When the fan is stopped, pressure applied by water against one face of each flap 91 become greater than pressure of air contained in ducts 11 and applied against opposite face of each flap 91. When this occurs, each flap 91 is push by water against section 63 to cover orifice 53 and prevent any fluid communication between outlet 35 and inlet 33 through said orifice 53.
  • Water contained in the bath “B” may be removed by any appropriate means well known to one skilled in the art (e.g. a drain 113 provided in the bottom 1).
  • An improved therapeutic bath according to the invention can also result from the combination of the bath "B" (shown in FIGS 1 and 2) with a check valve “CV′"(shown in FIGS 13 and 14) mounted across each openings 9.
  • a check valve “CV” shown in FIGS 13 and 14
  • Protuberance 54 contributes to further improve the tightness of valve "CV” when this latter is closed.
  • the invention relates to an improvement to a bath "B", as illustrated in Figures 1 and 2.
  • This improvement consists of a check valve variant "CV2" as shown in Figures 15 to 24, mounted across each opening 9 in order to allow a pressurized flow of air generated by the fan 13 to circulate successively through said ducts 11 and through said check valve "CV2" mounted through said openings 9, and then to bubble in water "W", and, when the fan 13 is stopped to prevent any introduction of water "W” toward said ducts 11.
  • the use of check valve "CV2" allow to keep dry ducts 11 and thus prevent any growth of bacteria and/or fungi therein.
  • the invention relates to a check valve variant of the type comprising:
  • said means including at least one membrane is a nozzle comprising:
  • the first section 405 has opposite ends, a wall connecting said ends together and defining a conduit 409 (see Figure 22) therebetween, a longitudinal axis concentric with the longitudinal axis of said sleeve 401, and at least one longitudinal outer surface 411.
  • One end of the section 405 is intended to be in fluid communication with said duct means 11, and defines an inlet 413 to the nozzle.
  • This section 405 is further provided with means adapted for axially setting and fastening said first section 405 to seal a corresponding orifice 353 in the casing 331.
  • the second section 407 has opposite ends, a wall having an inner surface 415, an outer surface 417 and connecting said ends together to define a conduit 419 (which preferably has a frustum geometry, see Figures 22 to 24) therebetween, a longitudinal axis concentric with the longitudinal axis of said sleeve 401.
  • One end of section 407 is integral with the end of section 405 opposite to the inlet 413 of the section 401.
  • Conduits 409 and 419 communicate together.
  • the other end of section 407 is shaped to define opposite lips, preferably two opposite lips 421. More particularly, for each lip 421, a segment of the wall of the second section 407 defines a membrane 427 made of resilient and flexible material.
  • this material is further provided with elastic properties and two or more lips 421 are positionned in such a way (one with respect to the other) that when there is no differential of pressure between opposite faces of each membrane 427, they are brought and kept one against the other by the mere elastic force of membranes 427.
  • the end of the section 407 that is opposite the end integral with section 405 is intended, when lips 421 are separated from each other, to define the outlet 429 (see Figures 21 and 24) of the nozzle and to be in fluid communication with an interior of the tub.
  • each lip 421 of each membrane 427 is bevelled in order to increase the surface of contact between said lips 421 when the outlet is closed.
  • each membrane 427 When the pressure applied by the air on face 415 of each membrane 427 is higher than the pressure applied by water "W" on the opposite face 417 of said membrane 427 (plus eventually the elastic force of membranes that may bring and keep lips 421 one against the other), then membranes 427 and lips 421 are disformed and lips 421 are separated from each other to allow a fluid communication from the duct means to the tub (check valve open) and thus allow the pressurized air to bubble in water.
  • means adapted to position and fasten the sleeve 401 inside the orifice 353 of the casing 331 consist of a pair of protuberances 395 and 397 integral with said longitudinal outer surface 411 of section 405 and provided with radial faces 396 and 398, said radial faces being intended to contact opposite faces of the partition wall 363.
  • means for axially setting and fastening casing 331 of check valve "CV2" to seal a corresponding opening 9 may consist of:
  • Casing 331, collar 371, partition 363 and protuberance 383 are advantageously integral to each other and are preferably made with an appropriate plastic material. They are preferably obtained by conventional moulding technics.
  • An example of a preferred plastic material is SANTOPRENE (trade mark), especially SANTOPRENE having a shore "A" durometer value ranging from 82 to 92 (i.e. 87 ⁇ 5).
  • both sections 405 and 407 are made with an elastomeric material.
  • section 407 comprises two protuberances 395 and 397 which radially extend from the outer surface 411.
  • Section 407 and protuberances 395 and 397 may be of any appropriate elastomeric material.
  • section 405, membranes 427, lips 421, section 407 and protuberances 395 and 397 are integral to each other and made with an elastomeric material and they are preferably obtained by conventional moulding technics.
  • the elastomeric material is advantageously selected amongst those having resilience, flexibility and elastic properties. (An example of preferred elastomeric material is a silicone rubber, especially a silicone rubber having a Shore "A" durometer value ranging from 27 to 43 advantageously 27 to 33 (i.e. 30 ⁇ 3)).
  • lips 421 are preferably brought one against the other by the mere elasticity of the elastomeric material.
  • a preferred improved therapeutic bath which is defined by the combination of a bath "B" as shown in Figures 1 and 2 with with a improved check valve "CV2" as shown in Figure 24 mounted through each of its openings 9, works as follows:
  • the tub of bath “B” is filled with water by any appropriate means well known to one skilled in the art (e.g. faucets 112 shown in Figure 1) to a level “L” which is set above said check valves "CV2". Then, for each check valve "CV2", water “W” applies a pressure against one face of membranes 427 and press (or eventually further press) the lips 421 one against the other, in order to close the check valve "CV2" and prevent any flow of water "W” from the outlet 335 toward the inlet 333. Thus, ducts 11 are kept dry.
  • Water contained in the bath “B” may be removed by any appropriate means well known to one skilled in the art (e.g. a drain 113 provided in the bottom 1).
  • check valves according to the invention may have the following size characteristics:
  • the above-mentioned preferred embodiments of the invention are not limitative, and therefore, the invention also extends to any variants or equivalents that would be obvious for person skilled in the art.

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  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Epidemiology (AREA)
  • Pain & Pain Management (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Rehabilitation Therapy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Check Valves (AREA)
  • Percussion Or Vibration Massage (AREA)
EP19900313440 1989-12-12 1990-12-11 Appareil pour l'hydromassage et dispositif à clapet anti-retour pour ledit appareil Withdrawn EP0437048A3 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CA2005276 1989-12-12
CA 2005276 CA2005276A1 (fr) 1989-12-12 1989-12-12 Appareil d'hydromassage avec clapet de retenue
CA 2018117 CA2018117A1 (fr) 1990-06-01 1990-06-01 Clapet anti-retour pour appareil hydromasseur, et appareil hydromasseur, integrant ameliore integrant ledit clapet
CA2018117 1990-06-01

Publications (2)

Publication Number Publication Date
EP0437048A2 true EP0437048A2 (fr) 1991-07-17
EP0437048A3 EP0437048A3 (fr) 1991-07-24

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EP19900313440 Withdrawn EP0437048A3 (fr) 1989-12-12 1990-12-11 Appareil pour l'hydromassage et dispositif à clapet anti-retour pour ledit appareil

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002043543A2 (fr) * 2000-11-30 2002-06-06 C.G. Air Systemes Inc. Injecteur d'air cache avec mecanisme a ecoulement unidirectionnel et systeme de massage par air comprenant au moins un injecteur

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1112923A (fr) * 1954-10-19 1956-03-20 Clapet
FR76865E (fr) * 1959-08-11 1961-12-15 Gaz De Petrole Robinet à sécurité pour récipients de gaz sous pression, notamment pour bouteilles de gaz liquéfié
US4218784A (en) * 1979-04-25 1980-08-26 Gary Richards Dual-purpose diverter valve
EP0129738A1 (fr) * 1983-06-23 1985-01-02 Mitsubishi Denki Kabushiki Kaisha Dispositif de soupape de refoulement pour un compresseur
JPS60231077A (ja) * 1984-04-27 1985-11-16 Matsushita Electric Ind Co Ltd 電気掃除機の逆止弁装置
EP0209646A2 (fr) * 1985-04-26 1987-01-28 Günter Schüssler Bassin avec un dispositif d'aération de l'eau
WO1989010112A1 (fr) * 1988-04-25 1989-11-02 Hydrabaths, Inc. Systeme d'hydromassage a stimulation d'air

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1112923A (fr) * 1954-10-19 1956-03-20 Clapet
FR76865E (fr) * 1959-08-11 1961-12-15 Gaz De Petrole Robinet à sécurité pour récipients de gaz sous pression, notamment pour bouteilles de gaz liquéfié
US4218784A (en) * 1979-04-25 1980-08-26 Gary Richards Dual-purpose diverter valve
EP0129738A1 (fr) * 1983-06-23 1985-01-02 Mitsubishi Denki Kabushiki Kaisha Dispositif de soupape de refoulement pour un compresseur
JPS60231077A (ja) * 1984-04-27 1985-11-16 Matsushita Electric Ind Co Ltd 電気掃除機の逆止弁装置
EP0209646A2 (fr) * 1985-04-26 1987-01-28 Günter Schüssler Bassin avec un dispositif d'aération de l'eau
WO1989010112A1 (fr) * 1988-04-25 1989-11-02 Hydrabaths, Inc. Systeme d'hydromassage a stimulation d'air

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN, vol. 10, no. 96 (M-469)[2153], 12th April 1986; & JP-A-60 231 077 (MATSUSHITA DENKI SANGYO K.K.) 16-11-1985 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002043543A2 (fr) * 2000-11-30 2002-06-06 C.G. Air Systemes Inc. Injecteur d'air cache avec mecanisme a ecoulement unidirectionnel et systeme de massage par air comprenant au moins un injecteur
WO2002043543A3 (fr) * 2000-11-30 2002-12-27 Cg Air Systemes Inc Injecteur d'air cache avec mecanisme a ecoulement unidirectionnel et systeme de massage par air comprenant au moins un injecteur
US7665158B2 (en) 2000-11-30 2010-02-23 C.G. Air Systemes Inc. Hidden air jet with unidirectional flow mechanism and air massage system including at least one of these jets

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