Patent US2456871A successfully refreshed from Google Patents.
EP0333968A2
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EP
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Improved pressure adjusting device for controlling the liquid gas flow rate
Assignee: LIQUIPIBIGAS SpA
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Filing: 1988-05-03
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Granted: —
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Expires: 2008-05-03
Abstract
Abstract The present invention relates to an improved pressure adjusting device for controlling the flow rate of liquid gases, which comprises a body (1) consisting of a top half shell (3) and a bottom half shell (2), coupled to one another through the interposition of a resilient membrane (4) which defines a gas pressure control chamber (6) and a gas pressure reducing and delivery chamber (5), communicating with a gas delivery outlet. The bottom half shell (2) defines a cylindrical end piece (7) which can be coupled to the valve (8) of the gas pressure vessel (9). The main feature of the invention is that there are provided quick coupling means (10), operating between the end piece (7) and the valve (8), which are adapted to operatively engage with the operating knob (13) of the valve means of the adjusting device for preventing the adjusting device from improperly engaging with or disengaging from the gas pressure vessel (9) as the mentioned valve means are in their opening position.
Inventors
- 👤 Mario C/O Liquipibigas S.P.A. Limiroli
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-27 20:31
CPC Classifications
F; F16; F16L; F16L37/00; F16L37/28; F16L37/38; F16L37/44; F17; F17C; F17C13/00; F17C13/04; G; G05; G05D; G05D16/00; G05D16/04; G05D16/06; G05D16/063; G05D16/0675; G05D16/0683; G05D16/0691; F17C2205/00; F17C2205/03; F17C2205/0302; F17C2205/0323; F17C2205/0382; F17C2205/0385; F17C2205/0388; F17C2205/0394; F17C2221/00; F17C2221/03; F17C2221/032; F17C2221/035; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/03; F17C2223/033; F17C2250/00; F17C2250/06; F17C2250/0605; F17C2250/0636; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7723; Y10T137/7725; Y10T137/8593; Y10T137/87096; Y10T137/87105; Y10T137/87917; Y10T137/87925
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
160 words
An improved pressure adjusting device for controlling the flow rate of liquid gases, comprising a body (1) consisting of a bottom half shell (2) and a top half shell (3), which are coupled to one another through the interposition of a resilient membrane (4), said resilient membrane defining a gas pressure control chamber (6) and a gas pressure reducing and delivery chamber (5), communicating with a delivery outlet, said bottom half shell (2) defining with the gas valve (8) of the gas pressure vessel (8) a coupling end piece (7), characterized in that said pressure adjusting device further comprises quick coupling means (10) operating between said coupling end piece (7) and gas valve (8), adapted to operatively engage with a knob (13) for operating valve means of the pressure adjusting device so as to prevent said pressure adjusting device from improperly engaging with and/or disengaging from said gas pressure vessel (8) as said valve means are in their open position.
Claim 2
Dependent Claim
160 words
An improved pressure adjusting device for controlling the flow rate of liquid gases, comprising a body (1) consisting of a bottom half shell (2) and a top half shell (3), which are coupled to one another through the interposition of a resilient membrane (4), said resilient membrane defining a gas pressure control chamber (6) and a gas pressure reducing and delivery chamber (5), communicating with a delivery outlet, said bottom half shell (2) defining with the gas valve (8) of the gas pressure vessel (8) a coupling end piece (7), characterized in that said pressure adjusting device further comprises quick coupling means (10) operating between said coupling end piece (7) and gas valve (8), adapted to operatively engage with a knob (13) for operating valve means of the pressure adjusting device so as to prevent said pressure adjusting device from improperly engaging with and/or disengaging from said gas pressure vessel (8) as said valve means are in their open position.
Claim 3
Dependent Claim
105 words
A pressure adjusting device according to the preceding claim, characterized in that said quick coupling means consist of a resilient biassed slide member (10) transversely movable of said coupling end piece (7), said slide member (10) being provided with shaped openings the edges of which are adapted to be removably engaged in an annular groove (12) formed on said coupling end piece (7) so as to be arranged at an engagement position and at a disengagement position, one end of said slide member being adapted to abut against a lug (14) of said operating knob (13) as said operating knob is in its open position.
Claim 4
Dependent Claim
108 words
A pressure adjusting device according to one or more of the preceding claims, characterized in that it comprises, in said delivery chamber, a first and second lever (30, 31) pivoted to a support member (25) for guiding a piston member (24) controlling a gas delivery nozzle (21), said levers including each a long arm engaging with a bracket (35) rigid with the middle portion of said resilient membrane (4) and a plate (38) provided with a side driving arm (39) projecting from said chamber, said first and second levers (30, 31) causing said piston member (24) to slide in opposite directions with respect to said resilient membrane (4).
Claim 5
Dependent Claim
85 words
A pressure adjusting device according to one or more of the preceding claims, characterized in that is comprises an adjusting spring (37) acting on the middle portion of said plate (38), said adjusting spring (37) being calibrated by a slider (41) able of axially sliding so as to engage with a handwheel (42) rotatably supported by said top half shell (3), a top limit switch being provided for setting the minimum output pressure, and a bottom limit switch being provided for setting the maximum pressure.
Claim 6
Dependent Claim
72 words
A pressure adjusting device according to one or more of the preceding claims, characterized in that one (30) of said levers (30, 31) is adapted to operate as a flow rate adjusting member, by driving said piston (24) as said resilient membrane (4) is raised, the other lever (31) being adapted to operate as a member for adjusting the excess flow by driving said piston as said resilient membrane (4) is lowered.
Claim 7
Dependent Claim
48 words
A pressure adjusting device according to one or more of the preceding claims, characterized in that the pivot support (25) of said levers (30, 31) is adapted to operate as a guide member for said sliding piston (24) which is adapted to shut off said delivery nozzle (21).
Claim 8
Dependent Claim
80 words
A pressure adjusting device according to one or more of the preceding claims, characterized in that it comprises a ball (32) arranged in the gas outflow chamber (15) and adapted to operate as a restraining member which, by generating an increase of the gas flow charge loss, causes the excess flow lever to efficiently operate so as to shut off the gas delivery as the gas flow rate is greater than the rated flow rate of said pressure adjusting device.
Claim 9
Dependent Claim
49 words
A pressure adjusting device according to one or more of the preceding claims, characterized in that it comprises a lever for adjusting the gas excess flow said lever being also adapted to operate as a member for signalling the gas path thightness conditions downstream of said pressure adjusting device.
Claim 10
Dependent Claim
61 words
A pressure adjusting device according to one or more of the preceding claims, characterized in that it comprises an O-ring gasket (46) mounted on a vertical stem (16) for opening and closing said valve means and adapted to operate as a gas flow shut off member even in the case of a malfunction of the valve mounted on said pressure vessel.
References Cited (Backward Citations)
No citation records indexed.
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