US3913830A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixer valves
Assignee: BARKING BRASSWARE CO Ltd
•
Filing: 1974-01-14
•
Granted: 1975-10-21
•
Expires: 1994-01-14
Abstract
Abstract In a mixer valve for a shower fitting a duplex metering valve member and a thermostat element are mounted between two springs. When the mixer is in operation one of the springs is held in a prestressed condition so that all movement of the duplex metering valve member is accommodated by the other spring. When the mixer is turned off the hot water inlet closes first to prevent a mixed water outflow at scalding temperature, and then the mixed water outflow is itself stopped by an outlet valve member. An adjuster is provided between the outlet valve member and the duplex metering valve member for accommodating minor variations in component machining and for setting the maximum temperature of the mixed fluid flow when the mixer is fully on.
Inventors
- 👤 Victor Howard George King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:03
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/01; G05D23/13; G05D23/1306; G05D23/132; G05D23/134; G05D23/1346
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
166 words
A mixing valve comprising in combination a valve body defining a mixing chamber having a pair of inlets and an outlet for mixed fluid, an inlet valve member movable to vary inversely the openings of the inlets, an outlet valve member movable to open and close the outlet as desired, control means for moving the outlet valve member, a thermostat element arranged to sense mixed fluid temperature and to cause movement of the inlet valve member relative to the control means, first resilient means disposed between the inlet valve and the valve body, and, second resilient means opposing the first resilient means and disposed between the inlet valve means and the control means, wherein the second resilient means is held in a prestressed condition while the outlet is opened, the arrangement being such that operation of the controL means to close the outlet first overcomes the first resilient means and closes one of the inlets, and then overcomes the second resilient means and closes the outlet.
Claim 2
Dependent Claim
166 words
A mixing valve comprising in combination a valve body defining a mixing chamber having a pair of inlets and an outlet for mixed fluid, an inlet valve member movable to vary inversely the openings of the inlets, an outlet valve member movable to open and close the outlet as desired, control means for moving the outlet valve member, a thermostat element arranged to sense mixed fluid temperature and to cause movement of the inlet valve member relative to the control means, first resilient means disposed between the inlet valve and the valve body, and, second resilient means opposing the first resilient means and disposed between the inlet valve means and the control means, wherein the second resilient means is held in a prestressed condition while the outlet is opened, the arrangement being such that operation of the controL means to close the outlet first overcomes the first resilient means and closes one of the inlets, and then overcomes the second resilient means and closes the outlet.
Claim 3
Dependent Claim
47 words
A mixer valve according to claim 1 wherein there is provided an adjuster for setting the position assumed by the inlet valve member relative to the control means when the outlet is closed, and wherein the adjuster is disposed between the thermostat element and the control means.
Claim 4
Dependent Claim
32 words
A mixer valve according to claim 1, wherein the second resilient means comprises a compression spring held within a sleeve by an inner member capable of limited movement axially of the sleeve.
Claim 5
Dependent Claim
15 words
A mixer valve according to claim 3, wherein the sleeve carries the outlet valve member.
Claim 6
Dependent Claim
15 words
A mixer valve according to claim 3, wherein the inner member engages the thermostat element.
Claim 7
Dependent Claim
14 words
A mixer valve according to claim 5, wherein the inner member incorporates the adjuster.
Claim 8
Dependent Claim
25 words
A mixer valve according to claim 6, wherein the adjuster comprises a screw mounted in the inner member and arranged to engage the thermostat element.
Claim 9
Dependent Claim
41 words
A mixer valve according to claim 3, wherein the control means is so mounted as to be capable only of rotational movement relative to the valve body and is arranged to move the sleeve axially of the body when so rotated.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |