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Publication numberUS1138551 A
Publication typeGrant
Publication dateMay 4, 1915
Filing dateJun 12, 1913
Priority dateJun 12, 1913
Publication numberUS 1138551 A, US 1138551A, US-A-1138551, US1138551 A, US1138551A
InventorsEdmund F Gebhardt
Original AssigneeEdmund F Gebhardt
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Relief-valve.
US 1138551 A
Abstract  available in
Images(1)
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Claims  available in
Description  (OCR text may contain errors)

E. F. GEBHARDT.

, RE1IE F VALVE. APPLICATION FlLEjD'lUNE 12. 1913.

1,138,551. Patented' May4 1915.

THE NORRIS PETERS C0,. PHoTc-LITHQ, WASHINGTON. D c

EDMUND F. GEBI-IARDT, OF EASTON, PENNSYLVANIA.

' RELIEF-VALVE.

Application filed June 12, 1913.

To all whom it may concern Be it known that I, EDMUND F. GEBHARDT, a citizen of the United States, residing at Easton, in the county of Northampton and State of Pennsylvania, have invented new and useful Improvements in Relief-Valves, of which the following is a specification.

This invention relates to improvements in relief valves, proposing a structure which is especially applicable to hot water heating systems, wherein the relief valves are interposed between the expansion tank and a pipe leading from the boiler and serve to regulate the pressure in the system without regard to the elevation of the tank.

Valve constructions of the type stated usually include two valve bodies, one of which (for convenience, herein designated as the main valve) controls the passage through which the water flows from the system to the expansion tank, and the other of which, (for convenience, herein designated as the return valve) controlsthe passage through which the water returns from the expansion tank into the system.

The present invention is essentially directed to the organization of the main or relief valve proper and its principal object is to provide a relief valve, as described, wherein the parts are so organized that the main valve cannot become stuck upon its seat, and hence, cannot fail to open when the pressure in the system exceeds that determined upon as the maximum, yet is effectively closed during all normal ranges of the pressure in the system.

A further object of the invention is to provide an organization which, while having the advantage stated in the preceding sentence, is, at the same time, of'simple, inexpensive, and practical character, embodies no parts which are liable to breakage, derangement, or undue wear, and is readily accessible for the purposes of cleaning,renewal, or repair, whenever the occasion may require.

An embodiment of the invention is illustrated in the accompanying drawings, wherein the figure is a vertical central sectional view of the improved valve.

The valve comprises a casing 1 which is connected, on the one hand, to the system by a pipe 2, and on the other hand, to the expansion tank 3 by a pipe 4. Within the easing a pipe 5 is provided, which directly communicates with the pipe 2, forming, in effect,

Specification of Letters Patent.

Patented May 4, 1915.

Serial No. 773,289.

an extension thereof, and has at its upper end an annular valve seat 6, which functlons as an outlet into the interior of the casing 1 and is normally closed by a main valve 7. When the pressure in the system exceeds the maximum degree determined upon, the water forces the valve 7 from its seat, and then passes into the interior of the casing 1 and through the pipe 4 into the expansion tank 3. When the pressure in the system falls below the maximum degree determined upon, the water flows from the expansion tank into the interior of the casing, and through the return valve 8 into the pipe 5, and through this back into the system. The flow of water from the system into the expansion tank is indicated by the arrows in full lines, and the return of water from the expansion tank into the system is indicated by the arrows drawn in dotted lines.

' The valve 8 works with relation to a seat 9, and the valve seats 6 and 9 are conven-- lently formed as parts of a. casing or enlargement 10, provided at the upper end of the pipe 5. p The valve 7 is normally held closed by 'a weight 11, preferably in the form of a ball, and resting upon a concave upper surface 12 of said valve. The relation between the weight 11 and the valve and the casing is such that no special guide means for said weight, during the opening and closing movements of the valve 7 is required. It will be observed that there is a substantial space intervening between the weight and the surrounding wall of the casing 1, yet the weight is always accurately centered with relation to the valve 7, and cannot possibly become displaced or disen gaged from said valve. relation between the casing 1 and the weight 11 which is so selected that while said weight normally has no contact with said casing, yet it cannot become disengaged from the valve because should it momentarily move to one side of the valve during the movement of the latter, said weight cannot move in any direction beyond or as far as the center of the valve'but will strike against the casing and ultimately return to its seat upon said valve. The valve 7, in turn, is accurately and positively centered with relation to its seat, and for this purpose, it is preferable to make said seat 6 in the form of a flange having the outline of a truncated cone, the upper edge face of said flange engaging This is due to the securely against the under face 13 of the valve 7, and the latter being provided with an annular extension 14: which pro ects downwardly beyond the face 13 and has its 7 lower end fashioned as at 15 to seat upon the flat upper wall of the casing or enlargement 10. It will thus be apparent that the construction of valve and valve seat described provides for at least two pairs of coacting valve surfaces, one of which con-, sists of the valve surface 13, and the upper edge of the seat 6, and the other of which consists of the valve surface 15, and the top wall of the casing or enlargement 10. The relation of the cooperating valve faces not only insures of the accurate and positive centering of the valve 7 with relation to its seat, as described, but it also insures of a particularly reliable closure of the valve 7 since, in the event that there should be wear between the face 13 and the seat '6, the valve 7 will still effectually close the outlet from the casing or enlargement 10, by virtue of the engagement of the valve face 15 upon the top wall of said casing or enlargement.

The casing 1 is preferably made in upper and lower sections 1 and 1", and the lower section 1 is connected to the pipes 2 and 1, while the upper section 1, which incloses the operating part of the valve, has its lower end threaded for engagement with corresponding threads at the upper end of the section 1 The section 1 has at its upper end a projection 1 for engagement by a Wrench when it is desired to remove the section 1 from the section 1 When such removal has been accomplished, the parts of the valve are readily accessible, as is obvious.

It will be apparent from the foregoing description that the valve herein described is of extremely simple structural character,

' and embodies no parts which areliable to derangement. The weight 11 effectually holds the valve 7 in closed relation, and the efiectiveness of the closure afforded by the valve 7 is determined by the manner in which said valve is positively centered with relation to its seat, and also by the provision of at least two pairs of coacting valve faces, whereby should one pair of valve faces become somewhat worn, the other faces will give good service. While the weight 11 is particularly effective in maintaining the closed relation of the valve 7, the organization of said weight with relation to said valve and the casing is such that the valve is reliably responsive to an increase in the pressure in the system beyond the degree determined upon as a maximum, since there is no liability of the valve being stuck to its seat, and since the valve 7 and the weight 11 cannot possibly be subject to deposits of foreign matter suspended in the water, and cannot be affected by any deposits that may be precipitated upon the walls of the casings 1 or 10.

Having fully described my invention, I claim:

1. A relief valve organization comprising a casing having separate inlet and outlet connections, a pipe within said casing forming a continuation of the inlet connection and having at its upper end a valve seat which functions as an outlet into said casing, a main valve normally closing the outlet at the upper end of said pipe and being positively centered with relation to said seat, the main valve having a concave upper face, and a spherical weight resting upon the main valve and conformably seating upon said concave upper face, the width of the casing being so selected that the weight has normally no contact with the casing and displacement of said weight in any lateral direction as far as the center of said valve is prevented by thewall of the casing which surrounds said weight.

2. A relief valve organization comprising a casing having separate inlet and outlet connections, a pipe within said casing forming a continuation of the inlet connection and having at its upper end a valve seat which functions as an outlet into said casing, a main valve normally closing the outlet at the upper end of said pipe and being positively centered with relation to said seat, and a spherical weight resting upon the main valve, the width of the casing being so selected that the weight has normally no contact with the casing and displacement of said weight in any lateral direction as far as the center of said valve is prevented by the wall of the casing which surrounds the said weight. I

3. A relief valve organization comprising a casing having separate inlet and outlet connections, a pipe within said casing forming a continuation of the inlet connection and having at its upper end a valve seat which functions as an outlet into said casing, a main valve normally closing the outlet at the upper end of said pipe and being positively centered with relation to said seat, and a spherical weight resting upon the main valve, the width of the casing being so selected that the weight has normally no contact with the casing and displacement of said weight in any lateral direction as far as the center of said valve is prevented by the wall of the casing which surrounds said weight, said valve seat consisting of a flange formed asatruncated cone and the said valve engaging said flange with its under face and having an extension surrounding the flange and adapted to engage upon the upper face of said pipe.

4. A relief valve organization comprising a casing having separate inlet and outlet connections, a pipe within said'casing form ing a continuation of the inlet connection and having at its upper end a valve seat which functions as an outlet into said casing, a main valve normally closing the outlet at the upper end of said pipe and being positively centered with relation to said seat, the main valve having a concave upper face, and a spherical weight resting upon the main valve and conformably seating upon said concave upper face, the width of the casing being so selected that the weight has normally no contact with the casing and displacement of said Weight in any lateral direction as far as the center of said valve is prevented by the wall of the casing which surrounds said weight, said valve seat consisting of a flange formed as a truncated cone and the said valve engaging said flange with its under face and having an extension surrounding the flange and adapted to en gage upon the upper face of said pipe.

5. A relief valve organization comprising a casing having separate inlet and outlet connections, a pipe within said casing formthe casing being so selected that the weight has normally no contact with the casing and the displacement of said weight in any lateral direction as far as the center of said valve is prevented by the wall of the casing which surrounds said weight.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

EDMUND F. GEBHARDT.

Witnesses:

W, A. KEMMERER, P. W. HAY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner 015 Patents,

Washington, D. C.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4773444 *Nov 21, 1986Sep 27, 1988Bleth Joel JDual directional relief valve
US7032575Jul 16, 2003Apr 25, 2006Robert Bosch CorporationValve assembly for a fuel pump module
US8555915 *Jun 25, 2009Oct 15, 2013Richard A. BrunnerDual action low head isolation valve
US20040177646 *Mar 7, 2003Sep 16, 2004ElkcorpLNG production in cryogenic natural gas processing plants
US20050011559 *Jul 16, 2003Jan 20, 2005Robert Bosch CorporationValve assembly for a fuel pump module
US20090320936 *Dec 31, 2009Brunner Richard ADual action low head isolation value
Classifications
U.S. Classification137/493.8, 237/65, 137/534
Cooperative ClassificationF16K17/18