US3758028A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mixing valve and thermostat for use with same
Assignee: Individual
•
Filing: 1970-12-29
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Granted: 1973-09-11
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Expires: 1990-12-29
Abstract
Abstract A mixing valve for controlling both total volume of flow and relative volumes of flow through two inlet valves, such as hot and cold water valves, has the two valves bearing against a pressure plate which is tiltable on an axis offset with respect to the two valves. By increasing or decreasing the angle of tilt of the pressure plate, both valves are caused to open or close, increasing or decreasing the total volume of flow. By rotating the axis of tilt of the pressure plate relative to the valves, one valve or the other is caused to open or close more than the other, varying the relative volumes of flow through the two valves. Thermostat means may be provided to control rotation of the pressure plate to maintain a uniform temperature of the mixed outflow of the two valves.
Inventors
- 👤 H Lange
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:55
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/01; G05D23/13; G05D23/1306; G05D23/132; G05D23/134; G05D23/1346; G05D23/1353; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/87056; Y10T137/87088; Y10T137/87571; Y10T137/87676; Y10T137/87684; Y10T137/87692
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
159 words
Mixing valve for setting the mixture ratio of two fluids and the total flow rate thereof through two spaced inlet valves (4), comprising a pressure plate (10) engaging both valves on a diameter thereof and capable of being tilted on a tilt axis spaced from its diameter, an axially movable flow control part (15) bearing against a central portion of said pressure plate for adjusting its angle of tilt on said tilt axis, and a rotatable temperature regulating part (12) engaging said pressure plate for rotating it, whereby total volume of flow through the spaced inlet valves is controlled by motion of the flow control part to increase or decrease the angle of tilt of the pressure plate and the mixture ratio of flow through the spaced inlet valves is controlled by motion of the temperature regulating part to vary the position of the tilt axis of the pressure plate relative to the line joining the spaced inlet valves.
Claim 2
Dependent Claim
159 words
Mixing valve for setting the mixture ratio of two fluids and the total flow rate thereof through two spaced inlet valves (4), comprising a pressure plate (10) engaging both valves on a diameter thereof and capable of being tilted on a tilt axis spaced from its diameter, an axially movable flow control part (15) bearing against a central portion of said pressure plate for adjusting its angle of tilt on said tilt axis, and a rotatable temperature regulating part (12) engaging said pressure plate for rotating it, whereby total volume of flow through the spaced inlet valves is controlled by motion of the flow control part to increase or decrease the angle of tilt of the pressure plate and the mixture ratio of flow through the spaced inlet valves is controlled by motion of the temperature regulating part to vary the position of the tilt axis of the pressure plate relative to the line joining the spaced inlet valves.
Claim 3
Dependent Claim
40 words
Mixing valve according to claim 1, characterized in that the tilt axis of the pressure plate is substantially tangent to a circle described on the pressure plate by the centers of the spaced inlet valves where the plate is rotated.
Claim 4
Dependent Claim
71 words
Mixing valve according to claim 1, characterized in that the pressure plate (10) is guided in two bearings (A, B) connected with the temperature regulating part (12) and determining the axis of tilt, the pressure plate engagement with the flow control part (15) being in the form of a slip coupling permitting axial rotation of the pressure pLate relative to the flow control part in any position of the flow control.
Claim 5
Dependent Claim
46 words
Mixing valve according to claim 3, characterized in that the bearings (A, B) of the pressure plate (10) are formed by two arms (30) of a guide spring (11) secured concentrically in relation to the pressure plate, said arms enclosing an angle of less than 180*.
Claim 6
Dependent Claim
69 words
Mixing valve according to claim 4, characterized in that the pressure plate (10) is provided on the side towards the guide spring (11) with a concentric annular groove (31) arranged in its marginal zone, and in that the annular groove is engaged by a compression spring (32) having a purchase on the guide spring (11) and arranged in the region of the smaller angle enclosed by the arms (30).
Claim 7
Dependent Claim
22 words
Mixing valve according to claim 5, characterized in that the compression spring (32) is in the form of a leaf spring tab.
Claim 8
Dependent Claim
28 words
Mixing valve according to claim 4, characterized in that the bearings (A, B) are each formed by a fork-shaped arrangement of the arms (30) embracing the pressure plate.
Claim 9
Dependent Claim
24 words
Mixing valve according to claim 4, characterized in that the guide spring is firmly attached to and rotatable with the temperature regulating part (12).
Claim 10
Dependent Claim
52 words
Mixing valve according to claim 4, characterized in that the stems (8) of the inlet valves are guided by a common valve member spring (18) attached to the housing (1) and in that the said spring (18) enables the valve members to act as back-up safeties in case of failing water pressure.
Claim 11
Dependent Claim
74 words
Mixing valve according to claim 4, characterized in that the pressure plate (10) is tightly attached to an elastic corrugated tube (21) fixed to the mixing valve housing (1) with interposition of a gasket (23) and exerting an axially directed spring action on the pressure plate, and in that the guide spring (11) is arranged completely inside the chamber formed by the corrugated tube and the pressure plate, entirely closed off from the fluid.
Claim 12
Dependent Claim
59 words
Mixing valve according to claim 10, characterized in that the guide spring (11) is U-shaped, one leg of the U being fixed to the temperature regulating part (12) and the other leg being made into arms (30) spread at the tips and clipping into an annular groove (31) of the pressure plate (10), thereby forming the bearings (A, B).
Claim 13
Dependent Claim
25 words
Mixing valve according to claim 11, characterized in that the spread between legs of the guide spring is adjustable by means of a setscrew (25).
Claim 14
Dependent Claim
96 words
Mixing valve according to claim 30 characterized in that a thermostat element means (20) is mounted on the temperature regulating part (12) of the mixing valve, said thermostat element means being connected by way of a linkage (40-43) to the temperature regulating part (12) and the guide spring (11), which thermostat element means upon variation of the temperature of mixed hot and cold fluids passing through the valves (4) generates a rotation which the linkage (40-43) transforms into a rotation of the guide spring (11) and pressure plate (10) relative to the temperature regulating part (12).
Claim 15
Dependent Claim
82 words
Mixing valve according to claim 13, characterized in that, on the temperature regulating part (12), a cup (40) is provided, in that radially arranged bimetal elements (20) are provided in one sector of the cup, in that the sector containing the bimetal elements is bounded at one end by a projection (41) attached to the cup (40), and at the other end by another projection (42) connected to the part (11) determining the mixture ratio, which faces the mouth of the cup.
Claim 16
Dependent Claim
24 words
Mixing valve according to claim 14, characterized in that a compression spring (43) is arranged between the first projection (41) and the second (42).
Claim 17
Dependent Claim
20 words
Thermostat according to claim 13, characterized in that, as thermostatic element, at least one spirally wound bimetal spring is provided.
Claim 18
Dependent Claim
36 words
Mixing valve according to claim 1, characterized in that shut-off and regulating screws (19) operable from the outside and acting on the valve seats (7) of the inlet valves (4) are provided in the housing (1).
Claim 19
Dependent Claim
92 words
Mixing valve according to claim 1, characterized in that on the temperature regulating part (12), a lever (50) is pivoted on an axis perpendicular to the axis of rotation of the temperature regulating part, in that an eccentric plate (53) capable of being actuated by the lever and affording a mechanical advantage is arranged in the temperature regulating part (12), and in that the power of the eccentric plate (53), stepping up the lever, acts on a plunger (15'') capable of being displaced along the longitudinal axis of the temperature regulating part.
Claim 20
Dependent Claim
107 words
Mixing valve according to claim 18, characterized in that the eccentric plate (53) is provided with an oblong hole (55) through which a pin (54) is passed and fixed in the temperature regulating part (12), in that the purchase (57, 58) of the lever (50) is provided in the part of the eccentric plate (53) above the oblong hole, and in that the eccentric plate (53) is bounded by a segment of a circle at the bottom edge, more distant from the oblong hole (55) than the purchase of the lever (50), the center of said circle being off the centerline of the temperature regulating part (12).
Claim 21
Dependent Claim
32 words
Mixing valve according to claim 19, characterized in that the purchase of the lever (50) is in the form of a ball (58) engaging a spherical socket (57) in the eccentric plate.
Claim 22
Dependent Claim
33 words
Mixing valve according to claim 20, characterized in that the ball (58) is associated with an adjusting screw (59) capable of being adjusted along the axis of the lever (50) from the outside.
Claim 23
Dependent Claim
23 words
Mixing valve according to claim 18, characterized in that the plunger (15'') is provided with hydraulic damping means (70-74) cushioning its longitudinal motion.
Claim 24
Dependent Claim
52 words
Mixing valve according to claim 22, characterized in that the hydraulic damping means consist of a cylindrical recess (71) provided in the temperature regulating part (12) and a concentric disc connected with the plunger (15''), the outside diameter of the disc (70) being smaller than the diameter of the cylindrical recess (71).
Claim 25
Dependent Claim
31 words
Mixing valve according to claim 23, characterized in that the cylindrical recess (71) is closed off by a check valve (72, 73) opening in the direction of the cylindrical recess (71).
Claim 26
Dependent Claim
29 words
Mixing valve according to claim 24, characterized in that the interior chamber formed by the cylindrical recess (71) is in communication with the outside by way of vents (74).
Claim 27
Dependent Claim
29 words
Mixing valve according to claim 1, characterized in that the flow control part (15) comprises an axially movable spindle which bears against the center of the pressure plate (10).
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |