EP0119231A1 - Artificial limb valve - Google Patents

Artificial limb valve

Info

Publication number
EP0119231A1
EP0119231A1 EP19830902914 EP83902914A EP0119231A1 EP 0119231 A1 EP0119231 A1 EP 0119231A1 EP 19830902914 EP19830902914 EP 19830902914 EP 83902914 A EP83902914 A EP 83902914A EP 0119231 A1 EP0119231 A1 EP 0119231A1
Authority
EP
European Patent Office
Prior art keywords
valve
cone
space
artificial limb
ball
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Withdrawn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
EP19830902914
Other languages
German (de)
French (fr)
Inventor
Kjell ENGSTRÖM
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
Application filed by Individual filed Critical Individual
Publication of EP0119231A1 publication Critical patent/EP0119231A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/50—Prostheses not implantable in the body
    • A61F2/78—Means for protecting prostheses or for attaching them to the body, e.g. bandages, harnesses, straps, or stockings for the limb stump
    • A61F2/80—Sockets, e.g. of suction type
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/50—Prostheses not implantable in the body
    • A61F2/78—Means for protecting prostheses or for attaching them to the body, e.g. bandages, harnesses, straps, or stockings for the limb stump
    • A61F2/80—Sockets, e.g. of suction type
    • A61F2002/802—Suction sockets, i.e. utilizing differential air pressure to retain the prosthesis on the stump
    • A61F2002/805—Suction sockets, i.e. utilizing differential air pressure to retain the prosthesis on the stump having an air valve

Definitions

  • This invention relates to a valve for artificial limbs, which are retained in place by partial vacuum.
  • Such valves are known previously and located in the artificial limb in order at the application of the artificial limb on an amputated limb to permit the air in the artificial limb beneath the limb to pene ⁇ trate out and thereafter to maintain the partial vac ⁇ uum within the artificial limb required for retaining the same.
  • the present invention therefore, has the object to eliminate this problem and, more precisely, to provide an artificial limb valve of such a nature as to render possible continuous ventilation of the artificial limb without causing loss of the partial vacuum required for retaining the artificial limb.
  • valve according to the present invention has the characterizing features defined in the attached claims.
  • Fig. 1 is a schematic and partially sect ⁇ ional view of an artificial leg provided with a valve according to the invention
  • Fig. 2 is an axial section through the valve proper
  • Fig. 3 is a section along the line III-III in Fig. 2.
  • A designates an artificial limb, which is shown to be an artificial leg for a left leg amput ⁇ ated above the knee.
  • the artificial limb is designed
  • OMPI - with a hollow shank portion B the internal shape of which corresponds to the shape of the limb, i.e. in the present example the leg, for which the artificial limb is intended, and into which the leg is pressed down for applying the artificial limb.
  • the air within the hollow shank portion B is pressed out through an opening C in the lower portion of the shank B of the artificial limb, whereby a partial vacuum is obtained which is suffici ⁇ ent for retaining the artificial limb A on the leg.
  • the artific ⁇ ial limb A is provided in the opening C with a valve 1 according to the invention, which valve is attached detachably, for example screwn, in the opening G.
  • the valve 1 comprises a sleeve-shaped valve body 6 with external thread 7 for securing the valve in the opening C of the artificial limb and an external supporting flange 8 for abutting the outer surface of the artific ⁇ ial limb when the valve is applied, further a valve cone 10 assembled of a sealing portion 9 and a controls portion 3, which cone by a shaft 11 connecting the sealing portion 9 and control portion 3 relative to each other extends through an annular seat portion 12 in the valve body 6, which seat portion has an inner diameter smaller than the valve body in general ' and includes in its inward facing surface 14 a number of diametrically formed depressions 13-
  • the seat portion 12 owing to its confifuration also serves as a slide guide for the shaft 11 of the valve cone.
  • O ⁇ '.PI ar seat portion, so that air is prevented from passing through the valve 1 in either direction.
  • the present valve further comprises a valve ball 4, which with accurately adjusted clearance is freely mov ⁇ able in a substantially cylindric space 16 in the valve cone 10.
  • This space which has a diameter exceeding on ⁇ ly slightly the diameter of the- ' valve, ball 4, communic ⁇ ates with the outer surface of the valve, i.e. the atm ⁇ osphere, through a passageway 17 formed in the valve cone 10, more precisely in the control portion 3 there ⁇ of, and with the inside of the valve, i.e. with the space D of the artificial limb beneath the leg, through a passageway 18 formed in the valve cone 10, more prec ⁇ isely in the sealing portion 9 and shaft 11 thereof, which passageway aligns with the passageway 17.
  • a seat 19 and, respectively, 20 for the valve ball 4 are formed, which seats are located at a distance from each other which is only slightly greater than the diameter of the valve " ball and between which seats the valve ball 4 can move -freely in its space 16 to be caused to seal against either the seat 19 or against the seat 20.
  • the valve 1 operates as follows. At the application of the artificial limb A the control portion 3 of the valve is held depressed manually at the same time as the artificial limb A is pressed onto the leg, whereafter the valve 1 is closed by releasing the control portion 3, whereby the sealing portion 9 is moved by the spring 2 to sealing abutment - — - - *»
  • valve 1 during the pressing of the artificial limb on the leg is open, the air in front of the leg in the artificial limb is pressed out through the valve, and the partial vacuum thereby arising within the artificial limb A is fully sufficient to retain the artificial limb A in place.
  • valve ball 4 automatically is caused to seal against its seat 20 and the partial vacuum is maintained in the space D in the artificial limb A.
  • a pulsating pressure .within the space D of the artificial limb arises, i.e. a pressure which in ⁇ creases when the artificial leg is loaded and which decreases when the artificial leg is relieved.
  • valve ball 4 When the pressure in the space D increases, the valve ball 4 is moved to abut its seat 19, and during this move ⁇ ment of the valve ball a small amount of air is permitt ⁇ ed to flow out from the space, and when the artificial leg then is relieved, the pressure in the space D of the artifical limb again drops, whereby the valve ball 4 is returned to its seat 20 and seals against the same. During this movement of the valve ball 4 a small amount of fresh air is sucked into the space of the artificial limb.
  • the valve ball 4 in response to pressure variations arising in the space D of the artificial limb will seal alternatingly against its seats 19 and 20, whereby a certai ' ventil ⁇ ation of the space D in the artificial limb is obtained, or with other words, the leg enclosed in the artificial limb is given the opportunity of breathing.
  • the amount of air permitted to flow out from and, respectively, into the space D is determined by the clearance for the valve ball in its space, and this clearance is ad- justed so that the amount of air permitted to flow past the valve ball 4 is not greater than required for maint ⁇ aining the partial vacuum necessary for retaining the artificial limb.
  • This breathing rendered possible by the valve according to the present invention is suffic ⁇ ient for preventing suction sores,, from which carriers of artificial limbs so often suffer.

Landscapes

  • Health & Medical Sciences (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)

Abstract

Une vanne pour prothèse, qui est maintenue en place par un vide imparfait, comporte un corps de vanne (6) fixé dans la prothèse et un cône de vanne(10) situé dans le corps de vanne et destiné à évacuer l'air de la prothèse (A) lors de l'application de cette dernière. Afin de prévenir les blessures dues à la succion dont souffrent les porteurs de prothèses fixées par un vide imparfait, on prévoit dans le cône de vanne (10) de la vanne un organe de vanne (4) qui communique avec l'intérieur et avec l'extérieur de la vanne et qui, en réponse aux variations de pression sur l'intérieur (D) de la vanne, se déplace entre deux sièges (19, 20) situés relativement près l'un de l'autre dans un espace (16) réglé en fonction de la taille de l'organe de vanne pour l'échange d'air de l'espace de la prothèse à l'intérieur de la vanne.A prosthesis valve, which is held in place by an imperfect vacuum, has a valve body (6) fixed in the prosthesis and a valve cone (10) located in the valve body and intended to exhaust air from the prosthesis (A) when applying the latter. In order to prevent injuries due to suction from which wearers of prostheses fixed by an imperfect vacuum suffer, a valve member (4) is provided in the valve cone (10) of the valve which communicates with the interior and with the exterior of the valve and which, in response to pressure variations on the interior (D) of the valve, moves between two seats (19, 20) located relatively close to each other in a space (16 ) set according to the size of the valve member for air exchange of the prosthesis space inside the valve.

Description

Artificial limb valve
This invention relates to a valve for artificial limbs, which are retained in place by partial vacuum. Such valves are known previously and located in the artificial limb in order at the application of the artificial limb on an amputated limb to permit the air in the artificial limb beneath the limb to pene¬ trate out and thereafter to maintain the partial vac¬ uum within the artificial limb required for retaining the same.
It was found, however, that retaining of artificial limbs by means of partial vacuum involves poroblems for the artificial limb carriers, in that they often suffer from suction sores, which can be so tiring that it is a torment to carry the artificial limb.
The present invention, therefore, has the object to eliminate this problem and, more precisely, to provide an artificial limb valve of such a nature as to render possible continuous ventilation of the artificial limb without causing loss of the partial vacuum required for retaining the artificial limb.
This object is achieved in that the valve according to the present invention has the characterizing features defined in the attached claims.
The present invention is described in greater detail in the following with reference to the accompanying draw¬ ing, in which Fig. 1 is a schematic and partially sect¬ ional view of an artificial leg provided with a valve according to the invention, Fig. 2 is an axial section through the valve proper, and Fig. 3 is a section along the line III-III in Fig. 2.
In the drawing, A designates an artificial limb, which is shown to be an artificial leg for a left leg amput¬ ated above the knee. The artificial limb is designed
OMPI - with a hollow shank portion B, the internal shape of which corresponds to the shape of the limb, i.e. in the present example the leg, for which the artificial limb is intended, and into which the leg is pressed down for applying the artificial limb. When the artificial limb is pressed onto the leg, the air within the hollow shank portion B is pressed out through an opening C in the lower portion of the shank B of the artificial limb, whereby a partial vacuum is obtained which is suffici¬ ent for retaining the artificial limb A on the leg.
In order to maintain this partial vacuum, the artific¬ ial limb A is provided in the opening C with a valve 1 according to the invention, which valve is attached detachably, for example screwn, in the opening G. The valve 1 comprises a sleeve-shaped valve body 6 with external thread 7 for securing the valve in the opening C of the artificial limb and an external supporting flange 8 for abutting the outer surface of the artific¬ ial limb when the valve is applied, further a valve cone 10 assembled of a sealing portion 9 and a controls portion 3, which cone by a shaft 11 connecting the sealing portion 9 and control portion 3 relative to each other extends through an annular seat portion 12 in the valve body 6, which seat portion has an inner diameter smaller than the valve body in general' and includes in its inward facing surface 14 a number of diametrically formed depressions 13- The seat portion 12 owing to its confifuration also serves as a slide guide for the shaft 11 of the valve cone.
Between the seat portion 12 and control portion 3, which at the embodiment shown in the drawing is screwn onto the shaft 11 formed integral with the sealing portion 9, a compression spring 2 is clamped, which holds the sealing portion 9 provided with an annular sealing member 15 in sealing abutment to one side of the annul-
OΛ'.PI ar seat portion, so that air is prevented from passing through the valve 1 in either direction. By actuating the control portion 3 of the valve, for example manually, with a force exceeding the force exercized by the spring 2, the sealing portion is moved from its seat, and air is allowed to pass through the valve in both directi¬ ons.
The present valve further comprises a valve ball 4, which with accurately adjusted clearance is freely mov¬ able in a substantially cylindric space 16 in the valve cone 10. This space, which has a diameter exceeding on¬ ly slightly the diameter of the-'valve, ball 4, communic¬ ates with the outer surface of the valve, i.e. the atm¬ osphere, through a passageway 17 formed in the valve cone 10, more precisely in the control portion 3 there¬ of, and with the inside of the valve, i.e. with the space D of the artificial limb beneath the leg, through a passageway 18 formed in the valve cone 10, more prec¬ isely in the sealing portion 9 and shaft 11 thereof, which passageway aligns with the passageway 17. About this passageway and about the passageway 18, in the opposed sides of the space a seat 19 and, respectively, 20 for the valve ball 4 are formed, which seats are located at a distance from each other which is only slightly greater than the diameter of the valve"ball and between which seats the valve ball 4 can move -freely in its space 16 to be caused to seal against either the seat 19 or against the seat 20.
The valve 1 according to the present invention operates as follows. At the application of the artificial limb A the control portion 3 of the valve is held depressed manually at the same time as the artificial limb A is pressed onto the leg, whereafter the valve 1 is closed by releasing the control portion 3, whereby the sealing portion 9 is moved by the spring 2 to sealing abutment - — - - *»
to its seat surface on seat portion 12 of the valve body. Due to the fact that the valve 1 during the pressing of the artificial limb on the leg is open, the air in front of the leg in the artificial limb is pressed out through the valve, and the partial vacuum thereby arising within the artificial limb A is fully sufficient to retain the artificial limb A in place.
As soon as this partial vacuum arises, the valve ball 4 automatically is caused to seal against its seat 20 and the partial vacuum is maintained in the space D in the artificial limb A. When the artificial limb carr¬ ier moves, a pulsating pressure .within the space D of the artificial limb arises, i.e. a pressure which in¬ creases when the artificial leg is loaded and which decreases when the artificial leg is relieved. When the pressure in the space D increases, the valve ball 4 is moved to abut its seat 19, and during this move¬ ment of the valve ball a small amount of air is permitt¬ ed to flow out from the space, and when the artificial leg then is relieved, the pressure in the space D of the artifical limb again drops, whereby the valve ball 4 is returned to its seat 20 and seals against the same. During this movement of the valve ball 4 a small amount of fresh air is sucked into the space of the artificial limb. With other words, the valve ball 4 in response to pressure variations arising in the space D of the artificial limb will seal alternatingly against its seats 19 and 20, whereby a certai 'ventil¬ ation of the space D in the artificial limb is obtained, or with other words, the leg enclosed in the artificial limb is given the opportunity of breathing. The amount of air permitted to flow out from and, respectively, into the space D is determined by the clearance for the valve ball in its space, and this clearance is ad- justed so that the amount of air permitted to flow past the valve ball 4 is not greater than required for maint¬ aining the partial vacuum necessary for retaining the artificial limb. This breathing rendered possible by the valve according to the present invention is suffic¬ ient for preventing suction sores,, from which carriers of artificial limbs so often suffer.
OMPI
VifO

Claims

Claims
1. A valve for an artificial limb retained in place by partial vacuum, comprising a valve body (6) fasten¬ ed in the artificial limb and a valve cone (10) located in said valve body for discharging air from the artific¬ ial limb (A) at the application thereof, c h a r a c t¬ e r i z e d i n that in the valve cone (10) of the valve a valve member (4) is located, which communicates both with the inside and outside of the valve and in response to pressure variations on the inside (D) of the valve moves between two seats(19,20) located rel¬ atively close to each other in* a -space (16) adjusted in respect of the size of the valve member for air ex¬ change of the space of the artificial limb inside of the valve.
2. A valve as defined in claim 1, c h a r a c t e r ¬ i z e d i n that the valve member has the shape of a ball (4), and that its two seats (19.20) are located at a distance from each other which is only slightly greater than the diameter of the ball.
3- A valve as defined in claim 2, c h a r a c t e r ¬ i z e d i n that the space (lβ), in which the ball- -shaped valve member (4) is located, is cylindric with a diameter only slightly greater than that of the ball.
4. A valve as defined in any one of the preceding claims, c h a r a c t e r i z e d i n that the connection between the valve member (4) and the inside and outside of the valve consists of passageways (17, 18), which are located in the valve cone (10) aligning with each other, which passageways open concentrically in relation each to 'its seat (19,20) in the space (Iβ) of the valve member.
5. A valve as defined in any one of the preceding claims, c h a r a c t e r i z e d i n that the valve cone (10) movable in the valve body, in which cone the valve member (4) is located, consists of a*.-, sealing portion (9).sealing against an annular valve seat (12) in the valve body and of a control portion (3) connected to the sealing portion (9) and actuat¬ ed by a spring (2) for maintaining the sealing portion (9) in abutment to its seat (12).
6. A valve as defined in claim 5. c h a r a c t e r ¬ i z e d i n that the control portion (3) of the valve cone is detachably connected to the sealing portion (9) of the valve cone, and that the space (lβ) of the valve member is formed in the portions of said portions facing to each other.
EP19830902914 1982-09-10 1983-09-09 Artificial limb valve Withdrawn EP0119231A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8205167 1982-09-10
SE8205167A SE445968B (en) 1982-09-10 1982-09-10 VALVE FOR SUGAR PROTES

Publications (1)

Publication Number Publication Date
EP0119231A1 true EP0119231A1 (en) 1984-09-26

Family

ID=20347795

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19830902914 Withdrawn EP0119231A1 (en) 1982-09-10 1983-09-09 Artificial limb valve

Country Status (3)

Country Link
EP (1) EP0119231A1 (en)
SE (1) SE445968B (en)
WO (1) WO1984000881A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10842653B2 (en) 2007-09-19 2020-11-24 Ability Dynamics, Llc Vacuum system for a prosthetic foot

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI79021C (en) * 1988-09-28 1989-11-10 Martti J O Filppula Prosthesis.
US5490537A (en) * 1993-04-01 1996-02-13 Hill; David A. Prosthesis air valve assembly and tool therefor
US5662715A (en) * 1995-07-19 1997-09-02 Materials Engineering And Development, Inc. Modular interface connector for a prosthetic limb
US6287345B1 (en) 1995-08-18 2001-09-11 The Ohio Willow Wood Company Valve assembly for a prosthetic limb
US5702489A (en) * 1995-08-18 1997-12-30 Materials Engineering And Development, Inc. Valve assembly for a prosthetic limb
AU689725B2 (en) * 1995-08-23 1998-04-02 Milianku, Kristine Improvement to a protective item for supporting an appendage
US5980577A (en) * 1997-05-01 1999-11-09 Radis; Vasilis Protective item supporting an appendage
US6726726B2 (en) 1999-06-03 2004-04-27 Otto Bock Healthcare Lp Vacuum apparatus and method for managing residual limb volume in an artificial limb
US7744653B2 (en) 2004-04-22 2010-06-29 Otto Bock Healthcare Lp Vacuum pump with shock absorption and controlled rotation for prosthetic devices
US8568489B2 (en) 2007-08-01 2013-10-29 Otto Bock Healthcare Lp Vacuum pump for a prosthetic device
US8113235B2 (en) 2008-10-03 2012-02-14 David Robert Bogue Apparatus and methods for facilitating prosthesis donning, doffing, retention, and fit
US9615945B2 (en) 2011-11-29 2017-04-11 Otto Bock Healthcare Gmbh Prosthetic valve and vacuum adapter system
US9198780B2 (en) 2012-02-14 2015-12-01 Ossur Hf Vacuum assisted suspension system
AU2013256565B2 (en) 2012-04-30 2015-12-03 Ossur Hf Prosthetic device, system and method for increasing vacuum attachment
US9364348B2 (en) 2013-03-01 2016-06-14 Ossur Hf Vacuum suspension system
WO2015002955A1 (en) 2013-07-03 2015-01-08 Ossur Hf Prosthetic pin locking mechanism with vacuum tunnels
EP3164100B1 (en) 2014-07-01 2018-04-18 Ossur Iceland EHF Pump mechanism for vacuum suspension system
WO2016112030A1 (en) 2015-01-08 2016-07-14 Ossur Iceland Ehf Pump mechanism
WO2016187608A1 (en) 2015-05-21 2016-11-24 Ossur Iceland Ehf Pump system
WO2016196081A1 (en) 2015-05-29 2016-12-08 Ossur Iceland Ehf Pump system for use with a prosthetic device
EP3340941B1 (en) 2015-08-27 2021-11-10 Ossur Iceland EHF Pump system
US10512554B2 (en) 2016-08-26 2019-12-24 Ossur Iceland Ehf Pump system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE650858C (en) * 1935-02-13 1937-10-02 Weber & Greissinger Valve for artificial limbs with a sleeve to be attached to the stump by suction
DE746781C (en) * 1942-01-29 1944-08-23 Heinrich Brandenbergs Automatic ventilation valve for artificial limbs
US2696011A (en) * 1951-06-01 1954-12-07 John J Galdik Artificial leg with suction socket
DE2729800A1 (en) * 1977-07-01 1979-01-04 Walter Dr Med Surerus Knee joint prosthesis pressure chamber for stump - incorporates pneumatic ring and double valve system including pump connection

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8400881A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10842653B2 (en) 2007-09-19 2020-11-24 Ability Dynamics, Llc Vacuum system for a prosthetic foot

Also Published As

Publication number Publication date
SE8205167L (en) 1984-03-11
SE8205167D0 (en) 1982-09-10
SE445968B (en) 1986-08-04
WO1984000881A1 (en) 1984-03-15

Similar Documents

Publication Publication Date Title
EP0119231A1 (en) Artificial limb valve
US6287345B1 (en) Valve assembly for a prosthetic limb
EP0187461B1 (en) Tracheostoma valves
US6422235B1 (en) Vocal valve with filter
US5392775A (en) Duckbill valve for a tracheostomy tube that permits speech
US5007937A (en) Structure for enhanced retention of artificial limbs and method of fabrication
EP2192877B1 (en) Vacuum assisted prosthetic sleeve and socket utilizing a double membrane liner
US5103854A (en) Low pressure check valve for artificial respiration devices
US20070112440A1 (en) Valve system for prosthesis
US5584288A (en) Multi-stage mouth-to-mouth resuscitator valve
DE102012017214A1 (en) Prosthesis liner and prosthetic socket system with prosthetic liner and prosthetic socket
WO2014194998A1 (en) Prosthetic liner and prosthetic shaft system comprising prosthetic liner and prosthetic shaft
US20110022182A1 (en) Valve system for prosthetics
EP2260796A3 (en) Valve prosthesis for implantation in body channels
US9408724B2 (en) Air valve for external prosthesis
CA2054728A1 (en) Biological valvular prosthesis
US5645047A (en) Inhalation mask
EP0101589A1 (en) A valve for use in a suction line
WO2000021599A1 (en) Bi-functional in-line phonation valve
EP3125830B1 (en) Valve for prosthetic device
EP0300512A3 (en) Heart valve prothesis
US4595172A (en) Vent valves for prosthetic devices
EP0505885A1 (en) Valve for controlling the flow of a fluid flowing by negative pressure
DK151288B (en) ELASTIC COMPRESSED BELGES FOR USE IN A MANUALLY OPERATED RESPIRATORY DEVICE
GB1297305A (en)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB LI LU NL

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19840814