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Publication numberUS1404365 A
Publication typeGrant
Publication dateJan 24, 1922
Filing dateApr 19, 1920
Priority dateApr 19, 1920
Publication numberUS 1404365 A, US 1404365A, US-A-1404365, US1404365 A, US1404365A
InventorsHarry Hackman
Original AssigneeHarry Hackman
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Hot-water circulating system
US 1404365 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)




m: l I

Patented Jan. 24, 1922.


resident of the city of Toronto,




Application filed April 19, 1920. Serial No. 375,051.

To (ZZZ whom it may concem.

Be it known that I, HARRY HAGKMAN, a subject of the King of Great Britain, and county of York, Province of Ontario, in the 'Dominion of Canada, have invented certain new and useful Improvements in Hot-Water Circulating Systems, described in the following the heat in such water su l is wasted PP y specification and illustrated in the accom panying drawings, that form part of the same.

The principal objects of this invention are, to ensure a constant supply of hot water at the taps which may be obtained imme diately upon opening the tap and to obviate the loss of heat through allowing the hotwater in the pipes to 0001.

A further object is to minimize the set tling of dirt, scale, etc., within the pipes, and to provide a circulating system which can be readily adapted to any hot water systern.

tinuous circulation through the pipes is maintained.

In the drawings, Figure 1 is a diagrammatic elevational View illustrating the application of my invention to the water heating system. 1

Figure 2 is a plan sectional view of the furnace and hot water reservoir showing the arrangement of the heater coil.

It is well known that the ordinary system of piping dwellings with the hot water reservoir in the basement has a very objectionable feature, in that when hot water isrequired the cold water in the pipes has first to be emptied out and though only a small quantity of hot water may be required the whole length of pipe has to be filled and through lying in the pipe and cooling. It is therefore desirable to -maintain a con stant circulation of the Water through the supply pipes and I have devised the present system as being very simple and effective.

The arrangement is diagrammatically Specification of Letters Patent.

Patented Jan. 24, 1922.

illustrated in the drawings where l'represents the hot water reservoir having the usual cold water supply 2 and hot water pipe 3 which leads from the top of the reservoir to the various taps through the house.

At the dead end of the system which is usually the bath-room the hot water supply 3 connects with the faucet 4. I

A T connection 5 is arranged in the faucet connection and a return circulation pipe 6 is connected to said T and extends downwardly and connects with a T 7, the branch 8 of which connects with the bottom of the reservoir and the branch 9 connects with the lower end of the heater coil 10 arranged in the furnace. The upper end 11 of the heater coil is connected into the side of the reservoir.

This arrangement of pipe provides that the supply to the heater coil 10 must be taken either from the bottom of the reservoir or from the return pipe 6 and as the water in the return pipe 6 will always be warmer than the water from the bottom of the reservoir the natural flow will be from the pipe 6 through the coil to the reservoir and as the water in the return pipe will through radiation be cooler than the water in the pipe 3, the natural circulation is established. the cooler water falling until it is passed through the heater coil when it is again forced into circulation.

This arrangement eliminates any necessity for a back flow valve as there cannot possibly be any back flow of cold water, and such a construction will maintain a constant supply of hot water at the faucet and the heating of the water will be accomplished quicker and with less loss than when cold water is taken directly from the bottom of the boiler to the heater coil.

What I claim as my invention is 1. In a hot water circulating system, the combination of the reservoir and a heater coil having its upper end connected solely intermediate of the height of said reservoir, :1- hot water pipe leading from the top of the reservoir, a. return circulation pipe leading from the dead end of the hot water pipe and connected directly to the lower end of the heater coil and to the lower end of the reservoir in a closed circuit.

2. In a hot water circulating system, the right pipe With the lower endof the heater 7 combination of the hot water reservoir, a coil, and a return circulation pipe connecthot Water feed connected to the top of the ed tosaid T and connected with the upper 10 reservoir, a heater coil having its upper end end of the hot water feed pipe from the connected to the side of the reservoir, a pipe reservoir. 7

leading upwardly from the bottom of the, p I

reservoir, a T connection connecting said up- HARRY HACKMAN.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2576719 *Jan 21, 1947Nov 27, 1951Koser Dellie BGas-burning air- and water-heating furnace with thermostatic control
US3097661 *Sep 20, 1960Jul 16, 1963Lee John W GInstant hot water system
US3186427 *May 11, 1962Jun 1, 1965Sturdi Mfg CoBase for washing machines
US5331996 *Oct 8, 1993Jul 26, 1994Ziehm Raymond GDual mode hot water circulation apparatus
US5518022 *Sep 6, 1994May 21, 1996Ziehm; Raymond G.Aspirator water circulation apparatus
U.S. Classification126/362.1, 122/20.00A
International ClassificationF24D17/00
Cooperative ClassificationF24D17/0078
European ClassificationF24D17/00J