US3929281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid mixing valves
Assignee: BARKING BRASSWARE CO Ltd
•
Filing: 1973-11-05
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Granted: 1975-12-30
•
Expires: 1993-11-05
Abstract
Abstract To reduce the possibility of discharging water at scalding temperature in the event of thermostat failure or sudden loss and re-establishment of hot water supply, a duplex valve regulating the mixing of hot and cold water for a shower is provided with an auxiliary valve member which has little effect in normal operation but which is arranged to shut-off the hot water flow if the duplex valve moves to shut-off the cold water flow.
Inventors
- 👤 Alan Francis Woodward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:53
CPC Classifications
F; F16; F16K; F16K11/00; F16K11/02; F16K11/04; F16K11/044; G; G05; G05D; G05D23/00; G05D23/01; G05D23/13; G05D23/1306; G05D23/132; G05D23/134; G05D23/1346; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2564; Y10T137/2572; Y10T137/8593; Y10T137/87917
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
185 words
A mixing valve for mixing first and second fluids, the valve comprising in combination 1. an inlet for the first fluid, 2. an inlet for the second fluid, 3. an outlet for the mixed fluids, 4. a main valve member located between said inlets and movable to vary fluid flow through each said inlet in inverse relation to fluid flow through the other inlet, 5. control means including a thermostatic device connected to said main valve for controlling the position thereof to vary said fluid flow, 6. an auxiliary valve member carried by said main valve member for movement therewith, 7. said second inlet being located between said main valve member and said auxiliary valve member whereby fluid flow through said second inlet is controlled by said auxiliary valve member only when fluid flow through the first inlet falls below a predetermined rate after which fluid flow through the second inlet is controlled by said auxiliary valve in accordance with fluid flow through said first inlet, and 8. further valve means operable by said control means for controlling the flow of fluid through said outlet.
Claim 2
Dependent Claim
185 words
A mixing valve for mixing first and second fluids, the valve comprising in combination 1. an inlet for the first fluid, 2. an inlet for the second fluid, 3. an outlet for the mixed fluids, 4. a main valve member located between said inlets and movable to vary fluid flow through each said inlet in inverse relation to fluid flow through the other inlet, 5. control means including a thermostatic device connected to said main valve for controlling the position thereof to vary said fluid flow, 6. an auxiliary valve member carried by said main valve member for movement therewith, 7. said second inlet being located between said main valve member and said auxiliary valve member whereby fluid flow through said second inlet is controlled by said auxiliary valve member only when fluid flow through the first inlet falls below a predetermined rate after which fluid flow through the second inlet is controlled by said auxiliary valve in accordance with fluid flow through said first inlet, and 8. further valve means operable by said control means for controlling the flow of fluid through said outlet.
Claim 3
Dependent Claim
6 words
an inlet for the second fluid,
Claim 4
Dependent Claim
6 words
an inlet for the second fluid,
Claim 5
Dependent Claim
96 words
A valve as claimed in claim 1 in which the said inlets face one another, in which the said main valve member is a duplex valve member movable normally to said inlets, and in which said first inlet includes a Neck portion providing a seating for the said duplex valve member, said neck portion being located between said duplex valve member and said auxiliary valve member, said neck portion having first and second ends and being closable at said first end by said main valve member and at said second end by said auxiliary valve member.
Claim 6
Dependent Claim
28 words
A valve as claimed in claim 1 in which said thermostat device is located adjacent said outlet so as to sense the temperature of fluid in said outlet.
Claim 7
Dependent Claim
6 words
an outlet for the mixed fluids,
Claim 8
Dependent Claim
6 words
an outlet for the mixed fluids,
Claim 9
Dependent Claim
28 words
a main valve member located between said inlets and movable to vary fluid flow through each said inlet in inverse relation to fluid flow through the other inlet,
Claim 10
Dependent Claim
28 words
a main valve member located between said inlets and movable to vary fluid flow through each said inlet in inverse relation to fluid flow through the other inlet,
Claim 11
Dependent Claim
34 words
A valve as claimed in claim 3 wherein said control means also includes a manually operable control member, said thermostat device being disposed between the main valve member and said manually operable control member.
Claim 12
Dependent Claim
21 words
control means including a thermostatic device connected to said main valve for controlling the position thereof to vary said fluid flow,
Claim 13
Dependent Claim
21 words
control means including a thermostatic device connected to said main valve for controlling the position thereof to vary said fluid flow,
Claim 14
Dependent Claim
13 words
an auxiliary valve member carried by said main valve member for movement therewith,
Claim 15
Dependent Claim
13 words
an auxiliary valve member carried by said main valve member for movement therewith,
Claim 16
Dependent Claim
66 words
said second inlet being located between said main valve member and said auxiliary valve member whereby fluid flow through said second inlet is controlled by said auxiliary valve member only when fluid flow through the first inlet falls below a predetermined rate after which fluid flow through the second inlet is controlled by said auxiliary valve in accordance with fluid flow through said first inlet, and
Claim 17
Dependent Claim
66 words
said second inlet being located between said main valve member and said auxiliary valve member whereby fluid flow through said second inlet is controlled by said auxiliary valve member only when fluid flow through the first inlet falls below a predetermined rate after which fluid flow through the second inlet is controlled by said auxiliary valve in accordance with fluid flow through said first inlet, and
Claim 18
Dependent Claim
17 words
further valve means operable by said control means for controlling the flow of fluid through said outlet.
Claim 19
Dependent Claim
17 words
further valve means operable by said control means for controlling the flow of fluid through said outlet.
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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) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |