EP0512983A1 - Logement et pompe pour systemes de commande de courants d'air. - Google Patents

Logement et pompe pour systemes de commande de courants d'air.

Info

Publication number
EP0512983A1
EP0512983A1 EP90907581A EP90907581A EP0512983A1 EP 0512983 A1 EP0512983 A1 EP 0512983A1 EP 90907581 A EP90907581 A EP 90907581A EP 90907581 A EP90907581 A EP 90907581A EP 0512983 A1 EP0512983 A1 EP 0512983A1
Authority
EP
European Patent Office
Prior art keywords
pressure
housing
air
regulators
pump
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.)
Granted
Application number
EP90907581A
Other languages
German (de)
English (en)
Other versions
EP0512983A4 (fr
EP0512983B1 (fr
Inventor
Terence A Scott
Nozomu Kawasaki
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.)
Leggett and Platt Inc
Original Assignee
Leggett and Platt Inc
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
Application filed by Leggett and Platt Inc filed Critical Leggett and Platt Inc
Publication of EP0512983A4 publication Critical patent/EP0512983A4/fr
Publication of EP0512983A1 publication Critical patent/EP0512983A1/fr
Application granted granted Critical
Publication of EP0512983B1 publication Critical patent/EP0512983B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/08—Fluid mattresses or cushions
    • A47C27/081—Fluid mattresses or cushions of pneumatic type
    • A47C27/082—Fluid mattresses or cushions of pneumatic type with non-manual inflation, e.g. with electric pumps
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/08—Fluid mattresses or cushions
    • A47C27/081—Fluid mattresses or cushions of pneumatic type
    • A47C27/083—Fluid mattresses or cushions of pneumatic type with pressure control, e.g. with pressure sensors
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C27/00—Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/08—Fluid mattresses or cushions
    • A47C27/10—Fluid mattresses or cushions with two or more independently-fillable chambers

Definitions

  • Figure 6 is a partially diagrammatic illustration of the airflow control system utilized in the air bed of Figure 1.
  • the mattress 25 is formed from three separate individual sections 25a, 25b, 25c which, when placed end to end as illustrated in Figure 3, form a complete mattress. As illustrated in Figure 3, each section comprises five rows 26 of cells 35, each row 26 of which in the illustrated embodiment is seven cells wide.
  • Air Pump and Airflow Control System The air pressure within each of the cells is controlled by the air pump and airflow control system 15 contained within the housing 90. As a consequence of the construction of the pump and flow control 15, there is only an electrical cord 91 and four air supply lines extending from the housing 90.
  • the air pressure regulators R ⁇ ⁇ R 4 for controlling the pressure in each of the five zones of the mattress, as well as the pump for supplying pressurized air to the pressure regulators, and the surge check valves CV -CV are all contained within this housing 90. Additionally, this housing 90 contains the electric motor for driving the pump, as well as the solenoids and timers for controlling airflow from the pump to the mattress as described hereinbelow.
  • This pump and control circuit is schematically illustrated in Figure 6 and is physically illustrated in Figure 9.
  • surge check valves CV ⁇ -CV Located in the airflow path between the outlet 124 of each pressure regulator and the air conduit 50 to each zone 41-45 of the mattress, there is one of the surge check valves CV ⁇ -CV..
  • These surge check valves function to close and prevent the egress of air from any zone of the mattress whenever the pressure in a zone exceeds by a predetermined multiple, as for example, 1.7, the normalized pressure preestablished by the regulator to be maintained in that zone.
  • a predetermined multiple as for example, 1.7
  • Such high pressure within the zone would occur, for example, if the person stood on the mattress or kneeled on the mattress or sat on the mattress. If a person remained standing or sitting on the mattress for a long enough time and in the absence of the surge check valve CV.-CV., the mattress would eventually flatten or bottom out in that zone.
  • the reciprocating diaphragm pump 100 will continue to operate with a resulting pressure buildup in the lines 188-191 to the pressure regulators.
  • This buildup in pressure to the pressure regulators causes the piston rods 118 to move downwardly and uncover the exhaust ports 120 such that there is leakage airflow through the regulators via the exhaust ports 120 so long as the zones of the mattress are all at the preset normalized pressures of the regulator valves.
  • the pressure buildup to the pressure regulators also causes the volume of air delivered by the pump to be reduced. The leakage airflow just balances the flow from the pump without causing any changes of pressure in the zones of the mattress to which the regulators supply air.
  • D 8 reduces to the lower pressure determined by the setting of regulator S.. Any overpressure of the hip and shoulder zones which occurred while solenoid valve SOL-3 was energized is then allowed to flow from that zone back to the pressure regulator as a consequence of that overpressure until such time as the overpressure is reduced to the selected zone pressure.

Landscapes

  • Invalid Beds And Related Equipment (AREA)
  • Mattresses And Other Support Structures For Chairs And Beds (AREA)

Abstract

Un logement (90) contient une pompe à air (100) et un système d'alimentation en air pressurisé d'un support du corps, tel qu'un matelas pneumatique (25). Le logement (90) contient, outre la pompe à air (100), des régulateurs de pression (R1-R4) de type à diaphragme et des soupapes d'équilibrage (CV1-CV4) de type à diaphragme, de même que des passages (180, 187, 188-191) et des chambres de compression (160, 162, 163) qui relient la pompe aux régulateurs de pression et aux soupapes d'équilibrage.
EP90907581A 1990-02-02 1990-02-02 Logement et pompe pour systemes de commande de courants d'air Expired - Lifetime EP0512983B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1989/005326 WO1991011617A1 (fr) 1990-02-02 1990-02-02 Logement et pompe pour systemes de commande de courants d'air

Publications (3)

Publication Number Publication Date
EP0512983A4 EP0512983A4 (fr) 1992-03-20
EP0512983A1 true EP0512983A1 (fr) 1992-11-19
EP0512983B1 EP0512983B1 (fr) 1994-06-08

Family

ID=22215384

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90907581A Expired - Lifetime EP0512983B1 (fr) 1990-02-02 1990-02-02 Logement et pompe pour systemes de commande de courants d'air

Country Status (4)

Country Link
EP (1) EP0512983B1 (fr)
JP (1) JPH04504372A (fr)
DE (1) DE69009781T2 (fr)
WO (1) WO1991011617A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5666681A (en) 1995-01-03 1997-09-16 Hill-Rom, Inc. Heel pressure management apparatus and method
US6283907B1 (en) 1998-05-15 2001-09-04 Berwick Delaware, Inc. Method and associated apparatus for imparting a helical curl to ribbon material for making a decorative element
DE102012216760A1 (de) * 2012-09-19 2014-05-15 Siemens Ag Auflage zur Positionierung eines Patienten
JP2016087117A (ja) * 2014-11-05 2016-05-23 住友理工株式会社 流体セル型マットレス

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1984003027A1 (fr) * 1983-02-10 1984-08-16 Rodney Lyall Systeme de soutien du corps
EP0122666A2 (fr) * 1983-04-06 1984-10-24 Stichting Regionaal Centrum voor Revalidatie Amsterdam Support de couche comportant une pluralité de coussins gonflables et un système de mesure et de contrôle de la pression
US4491157A (en) * 1981-03-06 1985-01-01 Aisin Seiki Kabushiki Kaisha Valve assembly for air bag control
US4542547A (en) * 1982-12-15 1985-09-24 Hiroshi Muroi Pnuematic mat with sensing means
GB2167293A (en) * 1984-11-26 1986-05-29 Matsushita Electric Works Ltd Bedsore preventing apparatus
EP0228233A2 (fr) * 1985-12-30 1987-07-08 Ssi Medical Services, Inc. Structure de support pour patient
US4722105A (en) * 1986-09-02 1988-02-02 Owen Douglas Fluid support systems

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3747637A (en) * 1971-09-27 1973-07-24 Western Geophysical Co Pressure-operated multiport fluid control valve
US3913613A (en) * 1974-10-25 1975-10-21 Boris Nikolaevich Kostjunin Safety valve
US4171004A (en) * 1977-07-13 1979-10-16 Vending Components, Inc. Safety regulator for fluid pressure
JPS61207884A (ja) * 1985-03-12 1986-09-16 Diesel Kiki Co Ltd 圧縮機の脈動低減機構
GB8529809D0 (en) * 1985-12-04 1986-01-15 Dermalex Co Ltd Air supply & control apparatus
US4715787A (en) * 1986-03-28 1987-12-29 Utility Electronics Industries Co. Ltd. Coaxial, two-cylindered air compressor
US4797962A (en) * 1986-11-05 1989-01-17 Air Plus, Inc. Closed loop feedback air supply for air support beds

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4491157A (en) * 1981-03-06 1985-01-01 Aisin Seiki Kabushiki Kaisha Valve assembly for air bag control
US4542547A (en) * 1982-12-15 1985-09-24 Hiroshi Muroi Pnuematic mat with sensing means
WO1984003027A1 (fr) * 1983-02-10 1984-08-16 Rodney Lyall Systeme de soutien du corps
EP0122666A2 (fr) * 1983-04-06 1984-10-24 Stichting Regionaal Centrum voor Revalidatie Amsterdam Support de couche comportant une pluralité de coussins gonflables et un système de mesure et de contrôle de la pression
GB2167293A (en) * 1984-11-26 1986-05-29 Matsushita Electric Works Ltd Bedsore preventing apparatus
EP0228233A2 (fr) * 1985-12-30 1987-07-08 Ssi Medical Services, Inc. Structure de support pour patient
US4722105A (en) * 1986-09-02 1988-02-02 Owen Douglas Fluid support systems

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO9111617A1 *

Also Published As

Publication number Publication date
WO1991011617A1 (fr) 1991-08-08
EP0512983A4 (fr) 1992-03-20
JPH04504372A (ja) 1992-08-06
DE69009781D1 (de) 1994-07-14
EP0512983B1 (fr) 1994-06-08
DE69009781T2 (de) 1994-12-22

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