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US 2015/0028112 A1Published application
Thermostatic mixing valve
AssigneeAcorn Engineering Company
InventorsJames C. Graves, Dejan Zivancevic
Life of this patent
Estimating the term…
Abstract
Embodiment thermostatic valves are protected against damage to the wax motor from the leakage of hot water into the valve when the hot water inlet is closed. Embodiments include an improved temperature motive means with fewer parts than conventional valves and with an improved sealing relation between the wax motor/shuttle and the water ports.
Claims13
A thermostatic mixing valve comprising:
- a body,
- a mixing chamber having a wall located in the body
- a cold water path comprising a cold water inlet, cold water conduit, a circumferential cold water port, and a circumferential cold water seat on the upper edge of the cold water port, the cold water port and cold water seat located on the wall of the mixing chamber,
- a hot water path comprising a hot water inlet, hot water conduit, a circumferential hot water port, and a circumferential hot water seat located on the lower edge of the hot water port, the hot water port and hot water seat located on the wall of the mixing chamber below the cold water port and cold water seat,
- a mixed water path comprising a mixing chamber and a mixed water outlet,
- a shuttle having on its upper circumference a cold water lip and on its lower circumference a hot water lip,
- the shuttle having a lumen with a shoulder,
- the shoulder having an upper surface and a lower surface,
- a cylindrical wax motor comprising a wax motor stem and a wax motor body, the body having a shoulder with an upper surface and a lower surface,
- the wax motor inserted into the shuttle lumen,
- the wax motor shoulder upper surface in contact with the shuttle shoulder lower surface,
- the wax motor not connected to the shuttle,
- a shuttle spring in contact with the shuttle shoulder upper surface and biasing the shuttle toward the wax motor body, and
- a wax motor spring in contact with the wax motor shoulder lower surface and biasing the wax motor body toward the shuttle.
11 more elements
The temperature motive means of a thermostatic mixing valve comprising:
- a tubular shuttle having a lumen and a shoulder on the lumen,
- a cylindrical wax motor having a shoulder,
- the wax motor located within the shuttle lumen,
- the motor shoulder in contact with the shuttle shoulder, and
- the motor and the shuttle not connected to each other.
2 more elements
The temperature motive means of a thermostatic mixing valve comprising:
- a tubular shuttle having a cold water seat and a hot water seat on the outer surface of the shuttle,
- the shuttle having a lumen with a shoulder within the lumen,
- the shuttle shoulder having an upper surface and a lower surface,
- the shuttle shoulder upper surface capable of being biased downward in the mixing valve by a shuttle spring, and
- a cylindrical wax motor having a shoulder on the circumference of the wax motor,
- the wax motor shoulder having an upper surface and a lower surface,
- the wax motor lower surface capable of being biased upward in the mixing valve by a wax motor spring,
- the wax motor capable of being inserted into the shuttle lumen with the wax motor shoulder upper surface in contact with the shuttle lumen lower surface, the wax motor not connected to the shuttle.
5 more elements
Dependencies are inferred from the claim text.