CIRCULATING PUMP FOR HOT WATER HEATING SYSTEM

• US 3,582,229 A
• Filed: 08/25/1969
• Issued: 06/01/1971
• Est. Priority Date: 09/03/1968
• Status: Expired due to Term

• Current Assignee: Fellenberg Jost Eduard Von
• Original Assignee: Fellenberg Jost Eduard Von
• Inventors: FELLENBERG JOST EDUARD VON
• Application Number:
  US04/852,832
• Time in Patent Office: 645 Days
• US Class Current: 415/47
• CPC Class Codes: F04D 15/0016 mixing-reversing- or deviation valves
• CPC Class Codes: F16K 11/044 with movable valve members positioned between valve seats
• CPC Class Codes: F24D 3/105 pumps combined with multiple way valves

Abstract

A combined circulating pump and mixing valve for a hot water heating system comprises a single housing for the pump and the mixing valve. The mixing valve body is mounted in the housing between the hot and cold water inlets and the outlet, and the pump impeller is also mounted in the housing. The pressure differential produced by the impeller between its inlet and outlet is received by a device mounted in the housing, and this device controls the mixing valve body in response to the pressure differential transmitted to the device by the pump.

Claims

1. A combined circulating pump and mixing valve for a hot water heating system, comprising a single housing for the pump and the mixing valve, a hot water inlet and a cold water inlet opening into said housing, a mixed water outlet leading from said housing, a mixing valve body mounted in the housing between the inlets and the outlet, a pump impeller mounted in the housing and producing a pressure differential between an inlet and an outlet thereof, and a device receiving the pressure differential mounted in the housing, said device controlling the mixing valve body in response to the pressure differential transmitted to the device by the pump.

2. The combined circulating pump and mixing valve of claim 1, wherein the pressure differential receiving device communicates with a chamber located in the housing upstream of the impeller inlet and with a chamber located downstream of the impeller outlet.

3. The combined circulating pump and mixing valve of claim 1, wherein the pressure differential receiving device comprises a spring-load diaphragm.

4. The combined circulating pump and mixing valve of claim 3, wherein the mixing valve has a valve spindle operating the valve body, and the diaphragm is directly connected to the valve spindle.

5. The combined circulating pump and mixing valve of claim 4, comprising means for adjusting the spring load on the diaphragm for adjusting the position of the valve body.

6. The combined circulating pump and mixing valve of claim 5, wherein said adjusting means comprises a displaceable element attached to one end of the spring.

7. The combined circulating pump and mixing valve of claim 6, wherein said element is a pinion movable from the outside of the housing.

8. The combined circulating pump and mixing valve of claim 1, wherein the pressure differential device is arranged to close the hot water inlet when there is no pressure differential.

9. The combined circulating pump and mixing valve of claim 1, further comprising a spyhole in the housing for observing the position of the valve body.