US3698425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable breathing gas pressure regulator
Assignee: Aqua Lung America Inc
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Filing: 1970-02-03
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Granted: 1972-10-17
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Expires: 1990-02-03
Abstract
Abstract An adjustable breathing gas pressure regulator comprising means for connecting a pressurized gas source to a chamber having a spring biased piston therein with a hollow stem for gas passage, terminating in a valve surface for closure with an adjacent seat. The spring bias on the piston is externally adjustable by radially positioned threaded members which have tapered ends spaced radially about the end of the spring so that when they are turned, and moved along a radius, the taper effectively compresses or releases the spring by a general wedging action at the end of the spring, thereby changing the operative pressure characteristics of the piston.
Inventors
- 👤 John A Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:48
CPC Classifications
F; F16; F16K; F16K31/00; F16K31/12; F16K31/36; F16K31/363; B; B63; B63C; B63C11/00; B63C11/02; B63C11/18; B63C11/22; B63C11/2209; G; G05; G05D; G05D16/00; G05D16/04; G05D16/10; G05D16/103; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7781; Y10T137/7793; Y10T137/7808; Y10T137/7837; Y10T137/7876
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
118 words
In a regulator for controlling a source of pressurized breathing gas, the improvement which comprises: a cavity within the regulator; a piston positIoned for sliding movement within said cavity; a coil spring to bias said piston with respect to pressure forces encountered thereon; a stem connected to said piston having an elongated passage therethrough; a valve surface on said piston stem; a seat against which said valve surface of said stem can be seated; and, a tapered member which tapers in the direction of said coil spring radius which serves as a surface against which said spring rests so that when said member is moved radially with respect to said spring, it effectuates a change in compression thereof.
Claim 2
Dependent Claim
118 words
In a regulator for controlling a source of pressurized breathing gas, the improvement which comprises: a cavity within the regulator; a piston positIoned for sliding movement within said cavity; a coil spring to bias said piston with respect to pressure forces encountered thereon; a stem connected to said piston having an elongated passage therethrough; a valve surface on said piston stem; a seat against which said valve surface of said stem can be seated; and, a tapered member which tapers in the direction of said coil spring radius which serves as a surface against which said spring rests so that when said member is moved radially with respect to said spring, it effectuates a change in compression thereof.
Claim 3
Dependent Claim
46 words
A regulator as claimed in claim 1 wherein said tapered member comprises: a cylinder threaded into said regulator and terminating in a tapered portion which provides a surface against which said spring rests; and, means for turning said cylinder exposed to the exterior of said regulator.
Claim 4
Dependent Claim
125 words
An adjustable regulator for controlling a source of breathing gas under pressure comprising: a conduit within said regulator for connection at one end to a source of breathing gas; valve means downstream from said breathing gas source to control the flow of breathing gas through said conduit; a piston connected to said valve means which responds to gas pressure forces for movement within said conduit; a coil spring for mechanically biasing said piston with respect to breathing gas pressures; an adjustable member mounted for radial movement with respect to said spring to adjust the bias thereof, said adjustable member comprising a threaded cylinder having a tapered end portion interiorly of said regulator wall against which said spring can rest; and, means for turning said cylinder.
Claim 5
Dependent Claim
125 words
An adjustable regulator for controlling a source of breathing gas under pressure comprising: a conduit within said regulator for connection at one end to a source of breathing gas; valve means downstream from said breathing gas source to control the flow of breathing gas through said conduit; a piston connected to said valve means which responds to gas pressure forces for movement within said conduit; a coil spring for mechanically biasing said piston with respect to breathing gas pressures; an adjustable member mounted for radial movement with respect to said spring to adjust the bias thereof, said adjustable member comprising a threaded cylinder having a tapered end portion interiorly of said regulator wall against which said spring can rest; and, means for turning said cylinder.
Claim 6
Dependent Claim
33 words
An adjustable regulator as claimed in claim 3 further comprising: a sealing means oriented circumferentially with respect to said piston for sealing said piston against the passage of gas around the circumference thereof.
Claim 7
Dependent Claim
54 words
An adjustable regulator as claimed in claim 4 wherein said valve means comprise: a piston stem extending from the upstream side of said piston having a passage therethrough terminating in a valve surface; and, resilient seating means against which said valve surface can rest to curtail the flow of breathing gas through said passage.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |