US2602590A

US2602590A - Air vent valve

Info

Publication number: US2602590A
Application number: US79409A
Authority: US
Inventors: Edward J Zeitlin
Original assignee: Individual
Current assignee: Individual
Priority date: 1949-03-03
Filing date: 1949-03-03
Publication date: 1952-07-08
Anticipated expiration: 1969-07-08

Description

July 8,1952 7 :E; J. ZEiTLIN 2,602,590 LAIR VENT VALVE" Y I FiledMarch s, 1949 INVEN'I'OR. EDWARD u]. ZEJY'LJN ATTURNEY Patented July 8, 1952 Apn et'i nlMar -h 3*. 1 4

2' Claims; (01. v

This invention relates to" valves and more-par ticularly to air-vent valves for'steam heating sys tems; "The valve I more particularly belongs toa class of valves which permit'expulsion of air from thesystemunder action of internal pressuregeneratedby the expanded vapors. Furthermorathe valve is arranged to close automatically-when the hot vapors contact the thermostatic element; The airport valve closes,automatically-toprevent re admis'sion of air when "the internal pressure" of the system is below atmospheric pressure and thusapartialvacuum-ismaintained.

One ot-the obiectsof this inventionfis to provide; anai rvent valve of the type that permits varyingjthe rate-of discharge-of air from various sections in the heating system in accordance with the venting requirements or volume of air'tobe= eliminated to, balance the rate of "admission of steam to theradiators in the various sections of the-hea s s m- Another object of this inventionis to provide an :air vent valve that permits the egress tof air iromthe heating ystem when the steam pressure in-"th'e' system rises and prevents "the ingres s pf air back into the heating system whenthe steam pressure'in'the'system drops.

A still furtherpbj ect of this invention is to provide an adjustable air vent inthe valve to vary the rate of egress of air from the-valve so as to balance the Venting of the various sections of a heating system;

A Still. .further object of this invention is to providdan air check valve that is normally ;open, and said valve being closed by atmospheric;pre s-.v sure w en the internal pressure within saidvalve isgless than atmospheric;

Qtherobjects' of this inventionniay be appar entiby reference to the accompanying description I and the drawing in which Fig. 1 is a front elevationalviewof the valve,

Fig. 2is an exploded view of-the valve shown that supports the valve structure and is provided with threaded exterior and interior means for afilxing' said valve to the heating system. The valve I is also provided with an exterior barrel shaped housing 12 and a top or cap member I4. A thermostatic element l (in this case connoted that apprcxirnately halfpf this "elei'ne .vided in the valve' 19m align with s an-ipf ape n I9 m e qs v'hei 'lto seminar rain was str icted in the form of assailed beuowa thatls;

common in-the art) "ismountedwith-in the-waive?- housingand -th'e bellows I5 is provided With? an extended'threaded member 4:6 that' isthreadabl v a cone shaped:valveseat 23 formed in thefintei ior of base member i li A-port z i connects hevaive I seat'*23 with the-exterior of the -basel I posite .end. of the base -l-l 'is provided "w th threadedopening 25 to per-mit threajdably' sep in'g the-housing I=2'-thereto. The h'cni'silji'g'- provided with an external 'thread lfi -at' i an'dis also provided witha cutout p'ortien 2;! {a its -upper' periphery: A stop 28' 1's threadably se cured in a -socket i n-= the housing l2 andprjo ects 5 outwardly and' 'is 'adj 'acen't to the cutout'fportioh 21 Referring to theicap member l4;--it may b hollowed outso-thatfthecap nimbei WflLfiEdo over the :exteriorqf the member 12 and the an; member *1 M is previded withiian elongated"slbt 31i adjacentthe-lower edge of-the'cap I14;

Referringeto Figs. --8', "4' and-5i w may' -see construction of the airport and-butterfly F g. s imstrates-rt e biitterfiywalve 119; 7F illustrates the diskj-i member l 8 and it noted that a-pairofaperture 2 ,9 and 20 and iii mounted through 1 159. a iens a tures,-";the pins :may beffastenejd ina such as riveting, but in such f astenin th tures 31 and 32 in the disk 8. Thusw'ith thejpi ti a s ra edi nF s; 't iz one position; =the=butterfly valve 1-5 fwill er position-illustrated solid 'lines closing the air port area 33 and in an open position when air is being discharged from the valve, the butterfly valve l9v will assume the dotted position illustrated, this is due to a designed stable balance and a flat face around the apertures 3| and 32.

It is readily apparent, referring to Fig. 2, that the valve may be assembled as follows:

The butterfly valve [9 and disk l8 are first Joined so that they may be retained as illustrated in Fig. 5. The disk [8 is then threadably secured to the extended threaded member ii of the bellows IS. The member I6 is then threadably e.-

3 cured in the socket ll of the cap l4. This complete assembly is inserted through the housing [2 until the cap member l4 fits snugly over the end of the housing l2 and the cutout portion 21 is in alignment with the slot 34 of the cap member. By rotating the cap 14 with relation to the housing l2 until the aperture provided for pin 28 is in the position illustrated in Fig. 1, the pin 28 may then be secured to the member 12 and thus provides a stop member. When turned to the left as shown in Fig. 1, the stop pin 28 will abut against one end of the elongated slot 34 and in this position, the greatest air port opening is provided. When the cap member I l is'turned in an. opposite direction, the stop pin 28 will abut with the opposite end of the elongated slot 34 and a complete closure of the air vent will be attained. It is apparent that any degree of opening may be attained by these two positions. barrel shaped housing 12 holding the complete valve structure as described, it may be threadably secured in the threaded socket 25 of the base H and with the valve so mounted, the bellows member 15 must be set so that the valve face 22 is not in contact with the valve seat 23 and thus allows free passage of air past the valve and its seat; but when'heat is applied to the bellows l it must seat firmly on the valve seat 23 to close and prevent the passage of air or vapors through the port 24. It may be further noted that the valve is so constructed that the valve face 22 is the contact face of the steam vapors and being apart of the bellows I5; the heat acts upon the bellows to retain the valve face seated and closed. In this way the delicate convolutions of the bellows are protected from the steam vapors.

.In the normal functioning of the valve as described, it is apparent that with the valve l0 threadably secured to a riser in the heating system or a radiator, When the heat in the form of hot vapors starts to rise, the cold air will pass through the valve passing the valve seat around the bellows through the port 33 of disk 18 and out past thebutterfiy valve [9 as illustrated in Fig.5 passing through the cutout portion 21 and out through the elongated slot 35. At this time the positioning of cap 14 controls the degree of opening and therefore the velocity of the air flow. A full opening permits a maximum air flow. A full closing prevents the expulsion of air from the valve. The degree of opening may be regulated to control the rate of venting of air from the system. Of course the valve is primarily intended to permit a maximum required. venting to insure a full venting of a particular system.

The purpose of venting valves in a system is to provide a. quicker means of eliminating air from a system than is ordinarily possible by radiator air venting valves.

The purpose of this valve is to provide a vari With the directing the heat first to the part of the heating system where the heat demand is greatest. Also where the demand for heat is uniform throughout the system this valve provides a means to eliminate the air from all parts of the system at the same time regardless of the position with relation to the source of heat or to the amount and size of piping. The variable orifice in this valve provides this means of obtaining a venting balance.

Various changes and modifications may be made to the valve as described without departing from the spirit of this invention and this invention shall be limited only by the appended claims.

What is claimed is:

1. In an air'vent valve for a heating system a barrel shaped casing having an adjustable vent cap member supported thereon, a base portion threadably secured to said casing, a valve seat portion, a thermostatic valve in said casing and extending into said base portion, a passage through said base portion, said valve seating over said passage to provide an annular chamber therebetween and being operable to engage said seat member to close said passage to flow therethrough, said valve being threadably supported from said cap member, said vent cap provided with an elongated slot and said casing provided with an elongated cutout portion, said vent cap adjustably mounted on said casing so that the elongated slot is in alignment with the cutout portion of said casing.

EDW. J. ZEI'I'LIN..

REFERENCES CITED The following references are of recordin the file of this patent: v

UNITED STATES PATENTS Number. Name Date 773,688, Still Nov. 1, 1904' 1,247,218 Burkart Nov. 20, 1917 1,842,657 Cliiford Jan. 26, 1932 1,910,237 Cadwell May 23, 1933 2,190,197 Simpson Feb. 13, 1940 2,555,264 Zeitlin May 29, 1951 FOREIGN PATENTS Number Country Date 537,747 France Mar. 8, 1922