EP1531124A2 - Erste Druckreglerstufe für ein zweistufiges Unterwasseratemgerät - Google Patents

Erste Druckreglerstufe für ein zweistufiges Unterwasseratemgerät Download PDF

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Publication number
EP1531124A2
EP1531124A2 EP04016074A EP04016074A EP1531124A2 EP 1531124 A2 EP1531124 A2 EP 1531124A2 EP 04016074 A EP04016074 A EP 04016074A EP 04016074 A EP04016074 A EP 04016074A EP 1531124 A2 EP1531124 A2 EP 1531124A2
Authority
EP
European Patent Office
Prior art keywords
regulator
chamber
stage
channel
flexing
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Withdrawn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
EP04016074A
Other languages
English (en)
French (fr)
Other versions
EP1531124A3 (de
Inventor
Nino Pietrelli
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.)
Mares SpA
Original Assignee
Mares SpA
HTM Sport SpA
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 Mares SpA, HTM Sport SpA filed Critical Mares SpA
Publication of EP1531124A2 publication Critical patent/EP1531124A2/de
Publication of EP1531124A3 publication Critical patent/EP1531124A3/de
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63C—LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS; LIFE-SAVING IN WATER; EQUIPMENT FOR DWELLING OR WORKING UNDER WATER; MEANS FOR SALVAGING OR SEARCHING FOR UNDERWATER OBJECTS
    • B63C11/00—Equipment for dwelling or working underwater; Means for searching for underwater objects
    • B63C11/02—Divers' equipment
    • B63C11/18—Air supply
    • B63C11/22—Air supply carried by diver
    • B63C11/2209—First-stage regulators

Definitions

  • the present invention relates to aqualungs, particularly pressure regulators for the regulator first stage in two-stage aqualungs.
  • the diaphragm-type regulator first stage of a two-stage aqualung normally includes a reduction chamber which communicates via a delivery valve with the source of air or other gas mixture contained at high pressure in the tank. The gases are then transferred, via a connecting channel, to the regulator second stage.
  • the delivery valve is controlled by a control member comprising an impermeable and elastically deformable diaphragm, one wall of which faces a chamber which is in communication with the external environment.
  • the pressure of the external environment combined with the pressure drop generated in the second stage by the action of the diver inhaling, opens the valve, which will later be reclosed by the pressure of the gas delivered into the reduction chamber.
  • one known solution is to place the chamber housing the diaphragm, that is the flexing chamber, in communication with the flow of gases intended for delivery, in such a way as to increase the length of the opening stroke of the delivery valve due to the depression generated in the flexing chamber.
  • Document IT-A-1 251 831 discloses a regulator first stage in which the reduction chamber communicates with the connector to the second stage by a spout that extends partly into the depression chamber, avoiding influences on the diaphragm.
  • the manufacture and calibration of a regulator first stage of this type is very complicated.
  • IT-A-1 257 365 proposes a device which obtains similar results to the device of the document cited above, with an obvious simplification of construction: in the communication channel between the reduction chamber and the flexing chamber is an annular choke such as to allow sliding of the control member of the delivery valve, yet preventing the direct flow of gases between the two chambers.
  • This device is extremely efficient; nonetheless it has disadvantages. In the first place there is no way of adjusting the ejection action in the depression chamber relative to the flexing chamber; and the production of a regulator first stage with multiple connectors for the second stage would appear, in the light of the technology employed, to be extremely complicated.
  • the subject of the present is therefore a pressure regulator for the regulator first stage of a two-stage aqualung, comprising a reduction chamber which communicates, via a delivery valve, with an admission channel for admitting the high-pressure mixture of breathable gases, and with at least one outlet connected, via suitable connection means, to a regulator second stage, there being a flexing chamber for an elastically deformable diaphragm connected to a rod-shaped control member of the delivery valve, and there being an annular choke allowing axial sliding of the said member and obstructing the direct flow of gas between the said reduction chamber and the said flexing chamber; the regulator is provided with a channel which connects the said reduction chamber with the said flexing chamber, flow adjustment means being provided in the said channel.
  • the said channel that connects the reduction chamber to the flexing chamber enters the said reduction chamber via a port formed radially with respect to the said chamber, and positioned upstream of the outlet connected to the said second stage.
  • the said regulator first stage is advantageously provided with a plurality of outlets connectable to regulator second stages; in this case the reduction chamber is provided with a manifold from which the said outlets lead off.
  • Figure 1 shows the device according to the invention, with 1 denoting the body of the diaphragm-type regulator first stage for two-stage underwater breathing apparatus.
  • the said body 1 is provided axially at one end with a spigot 101 in which is formed the admission channel 111 for the mixture of breathable gases contained in a tank (not shown in the figure).
  • This channel 111 contains the filter 121.
  • Attached to the spigot 101 by a ring nut 201 is the yoke 10, which in turn is provided, at the diametrically opposite end, with a knob 11 controlling the clamping screw 12.
  • the shut-off element 411 of the valve 401 which acts on the seat 301, which sits on the bottom of the said channel and contains an axial hole 311 in which the stem 431 of the valve 401 slides.
  • the axial hole 311 of the seat 301 communicates with the reduction chamber 501, which in turn communicates with the distribution chamber 601, from which there lead off the channels 611 communicating with the outlets 701, to which the hoses will be connected for connection to the regulator second stages (which are not shown in the figure).
  • the latter is held leaktightly in the chamber 801 by the sealing means 202 and by the ring nut 302 screwed into the threaded opening 851 of the flexing chamber 801.
  • a threaded hole 332 is formed axially in the ring nut and into it a threaded cap 312 is engaged, having through holes 322,while a spring 102 is inserted between the cover 312 and the diaphragm 2.
  • the flexing chamber 801 communicates with the reduction chamber 501 via the channel 811.
  • a hole 831 which is formed in the body 1 of the regulator and communicates with the channel 811 and with the exterior, is the grub screw 821 able to engage with the thread 841 of the hole 831, and partly or totally to obstruct the channel 811.
  • Figure 2 illustrates a regulator first stage similar to that of Figure 1, except for the fact that the reduction chamber 901 has radial channels 911 placing it directly in communication with the outlets 701.
  • the choke 921 containing the through hole 931 allows the stem 431 of the valve 401 to pass through the reduction chamber 901, as far as the face plate 421 which rests against the diaphragm 2.
  • Figures 3 and 4 further clarify the difference between the embodiments illustrated in Figures 1 and 2, respectively.
  • Clearly visible too is the position of the grub screw 821 relative to the port of the channel 811 which places the flexing chamber in communication with the reduction chamber.
  • the fact that the channel 811 ends upstream of the outlets 701 in the reduction chamber means that the regulator of the invention can be produced with a plurality of outlets without compromising its functionality, the point here being that if the communication channel between the flexing chamber and the depression chamber, that is the reduction chamber and the outlet together, were formed at the outlet itself, in the case of a regulator with several outlets there would be two problems related to the complexity of the design of this structure as well as to the fact that, more particularly, at the outlets the velocity of the gas flow would drop sharply, greatly limiting the ejection effect.
  • the two alternative embodiments illustrated in Figures 1 and 3, and 2 and 4, respectively, relate to the organization of the connection between the various outlets and the reduction chamber.
  • a distribution chamber 601 from which the channels 611 lead off to the outlets 701; while in the second case the channels 911 lead off directly from the reduction chamber.
  • the two versions are substantially similar, the first can take a larger number of outlets because of the larger size of the distribution chamber 601 compared with the reduction chamber 501.
  • the adopted version which is much simpler in construction terms, is more suitable for a smaller number of outlets.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Safety Valves (AREA)
  • Control Of Fluid Pressure (AREA)
EP04016074A 2003-11-14 2004-07-08 Erste Druckreglerstufe für ein zweistufiges Unterwasseratemgerät Withdrawn EP1531124A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITGE20030092 ITGE20030092A1 (it) 2003-11-14 2003-11-14 Riduttori di pressione, per il primo stadio di riduzione
ITGE20030092 2003-11-14

Publications (2)

Publication Number Publication Date
EP1531124A2 true EP1531124A2 (de) 2005-05-18
EP1531124A3 EP1531124A3 (de) 2007-04-04

Family

ID=34430731

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04016074A Withdrawn EP1531124A3 (de) 2003-11-14 2004-07-08 Erste Druckreglerstufe für ein zweistufiges Unterwasseratemgerät

Country Status (3)

Country Link
EP (1) EP1531124A3 (de)
JP (1) JP2005147389A (de)
IT (1) ITGE20030092A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3398848A1 (de) 2017-05-04 2018-11-07 Mares S.p.A. Erste stufe eines reglers für zweistufige unterwasseratemschutzvorrichtungen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1251831B (it) 1991-05-10 1995-05-26 Mares Spa Riduttore di pressione per il primo stadio di riduzione degli autorespiratori subacquei bistadio
IT1257365B (it) 1992-07-31 1996-01-15 Mares Spa Riduttore di pressione, per il primo stadio di riduzione degli autorespiratori subacquei bistadio.

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1287785B1 (it) * 1996-05-16 1998-08-18 Htm Sport Spa Riduttore di pressione, per il primo stadio di riduzione degli autorespiratori subacquei bistadio.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1251831B (it) 1991-05-10 1995-05-26 Mares Spa Riduttore di pressione per il primo stadio di riduzione degli autorespiratori subacquei bistadio
IT1257365B (it) 1992-07-31 1996-01-15 Mares Spa Riduttore di pressione, per il primo stadio di riduzione degli autorespiratori subacquei bistadio.

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3398848A1 (de) 2017-05-04 2018-11-07 Mares S.p.A. Erste stufe eines reglers für zweistufige unterwasseratemschutzvorrichtungen
US20180319472A1 (en) * 2017-05-04 2018-11-08 Mares S.P.A. Regulator first stage for two-stage underwater breathing apparatuses
US10569848B2 (en) * 2017-05-04 2020-02-25 Mares S.P.A. Regulator first stage for two-stage underwater breathing apparatuses

Also Published As

Publication number Publication date
EP1531124A3 (de) 2007-04-04
JP2005147389A (ja) 2005-06-09
ITGE20030092A1 (it) 2005-05-15

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