USRE21334E

USRE21334E - Check valve

Info

Publication number: USRE21334E
Authority: US
Publication date: 1940-01-23

Description

Jan. 23, 1940. 4 F. 5 wHlTE -r AL Re. 21,334

CHECK VALVE Original Filed Feb. 21, 1934 /Nz/E/v TOPS:

,47-7'0AP/v: YS

K which engages the seat Ressued Jan. 23, 1940 UNITED STATES f PATENT OFFICE CHECK VALVE Forrest S. White, HoosickFalls, and Claude G.

Bordeaux, Albany, N. Y. y

Original No. 2,068,833, Serial No. 712,372, cation for 207,322

4 Claims.

Our invention more particularly relates to a check valve which is easy to manufacture, in expensive, easily installed and satisfactory in operation.

' Check valves as ordinarily manufacturedare mounted la Second opening through which the tool itself `maybe insertedin place and removed.

In accordance with our invention an insert is "provided with a passage and a seat and a valve member are mounted on the insert for closing the passage, the insert being readily removable from the housing or union.

Our invention will best be understood by reference to the accompanying drawing in which-- Fig. 1 is an exploded or disassembled view', partially in section, illustrating the parts of the check valve embodying our invention;

Fig.42 is a sectional view through the insert;

Fig. 3 is a plan View of Fig. 2; v

Fig. y4 is an axial section through the upper portion of the housing; and Fig. 5 is a side elevation showing the check valve and the pipes connected thereto in assembled relation.

Like -reference Referring rst to Fig. 5, Il! indicates generally a check valve embodying our invention to which the ends of two pipes I I and I2 are shown coning I3 is preferably generally cylindrical in form and is externally threaded at one endy as at I5 while the opposite end thereof is preferably contracted as at I6 and provided with a threaded opening I'I for the reception of thethreaded en d of pipe I2. f

An insert indicated generally at I8 is provided with abody portion I 9 formed with a seat 2B I4 on the end of the hous- 1ng and whichl is adapted to form a fluid tight is preferably generally cylindrical in form but the inner end thereof is inclined as at 2l to the plane of the seat 2U, preferably at an vangle of about 45 degrees. The insert IB is provided with February 21, 1934. reissue Mayll, 1938, Serial characters indicate like parts -throughout the drawing.

dated January 2s, 1937,

Appli- (ci. laute) v ,i a passage 22 communicating with the end thereof which is forme with a seat and with the inclined They 5 v is mounted on a hinged arm 25 f pivoted' as at; 26 on the insert. A somewhat loose connection is preferably provided between the valve member 24 and the arm 25. In the emend of the stem 21, the parts permit a vcertain amount of being arranged to play between the which it engages.

In accordance with our invention means are preferably provided for requiring rthe insert to bey -placed in a predetermined position within the housing as a prerequisite to the seat thereof engaging the seat on the housing, and which preventsv relative rotation between said insert and said housing.' v

It Will be observed that the successful operation of the valve depends upon its being so positioned, when installed, that it falls by gravity depends uponvthe housing being properly posi--v tioned lwith, respect to the valve. bel observed that the valve,v when installed,

of the housing when the valve has once been inposition where would be unsatisfactory, if not entirely inoperative. v 40 In accordance Awith our invention, means are provided exterior ofthe housing which when the valve Ais correctly positioned housing indicate the position of the valve. the embodiment of contracted portion In, my invention illustrated,

5, with the lugs 30 in,` the correct position to permit the insert to be installed properly, one of the edges of such contracted square portion I6 of the housing is on the top of the housing, and that any turning movement of the housing such as might result from screwing the thimble 34 on the oppo:

site end of the housing `could person installing the valve. When the proper edge of the square portion I6 `of the housing points upwardly, therefore, it affords to the user an` indication that the housing and the valve therein are in their correct positions.

It will be understood that my .invention is equally applicable to a vertically disposed pipe as it is evident that when the insert withthe valve is installed in a vertically disposed housing, the valve will also fall by gra vided the valve is at the upper end of theinsert. In the embodiment of the check valve is assumed to be placedinahori# zontal position, and in order that the check Valve may function properly, thea/alivememberl should be observed bythe swing upwardly away from the'valve seat 23.ff body member should,

The inclined face 2l of the therefore, incline upwardly and rearwardlywfrom the tapered end thereof towards the seat of the vThe housing Vl 3is h provided -with two ini lugs 30, between which are uneuualspaces peripherally of'the housing as will be evident 'from Figjl whichis a'is'ectional viewtaken through the axis ofthey housing. .'It'

is evident that the space a between the lugs at one side of the housing is less than .18D degrees Sand that the space between these lugs onthe opposits side of the housing is correspondingly more than 18) degrees. The lugs 3B are also arranged Vat the desired distance 'from the housing so that v between the wider spacing of the lugs 30, theiseat E@ thereof will engage the `peripheral seat i4 `on the end oi the housing, andthe forward inclined face of the bodyportion i9 of theiinsert engages the lugs 38 on the housing thereby preventing relative rotation between the insert and the Ihousing.

Our'check valve also comprises a pipe union 3l which is provided at its inner end with.a peripheral iiange 32 which is preferably rounded on its outer Jface as indicated in Fig. 1y and'forms a line contact and a huid tight engagement :with a seat 33 preferably conical in shape which is formed on the end of the insert 18.

A member M Iwhich be termed a'spanner nut or cap is provided witha `flange 35 fscrew" threaded on itslinterior` and adapted to engage the screwthreads l5 on the housing I3 "andis provided with an opening 3Gthroughwhichthe pipe union 3l extends. When theV "cap34 is screwed home on thehousing |3,.a shoulder 31 thereon `engages the flange 32 on the pipe union and forces the same into fluid tight 'engagement with the seat 33 ci the'insert iii, and the seat M -on the latter is in turn forced into Jfluid vtight engagement with the seat 'l 4 'on `the housing I3.'

It will be noted that the housing `l3andfthe insert I8 are self` centered by the engagement `of the conical valve seatsill)` andd, and'that thernemberslil -and the pipe union 3l are self centered by the engagement of the main body of the pipe union with the walls surrounding "fits the opening 35 and theengagement of the peripl'lery or the flange `32 of the pipe union against `the shojulder'l within the recess surrounding the opening '36 in member 34. The axes of the two parts, therefore coincide and when ,brought` toge'therthe rounded forward end `of the pipe union forms an annular'line contactwith the conical seat 53 of the insert. l. i

Our invention alsoprovides a novel form of ty against its seat proy our invention .illustrated f sive, as practically." Van automatic screwA machine,

member thereon. much,less,xtherefore, than is required inthecase' open en'd ofthe when the insert I8 is receivedk 4the words which :we

"end of said` housing nut are self centered and their 1' axis coincides with the axis ofthe housing andthe insert and the forward rounded end of the pipe union form an annular line contact and a uid tight joint withlthe conical seat of the insert with which it engages when the, parts are assembled.

.It .wilLbe apparent that the device embodying our invention is not only comparatively inexpen- `ll the parts may be made on 4 but is easy of manufacture since ,theseat 23 is readily accessible for grinding purposes and the valve member is also readily accessible for the mounting of the valve 4The :labor required is very of the ordinarycheck'valve. (Furthermore any repairs that are necessary on the check valve vduring thebperationtof the device "may readily be made. yThe insert `may readily be removed kby .withdrawing the cap34 andv then moving theipipe union 3l laterally from the insert when the` insert maybe withdrawn from its housingfandanydesired repairs may readily vbe made thereon.`

'While we have "described 'our invention Vin its preferred embodiment, it is to `be understood'that scription` and not of`limitation. Hence,fchanges within. the purview y'of the appended'clairnsmay bemade without departing from `the true scope i and spirit'of ourinvention inits'broader aspects.

What we claim is:

l. In a check valve, a housing open at one end, said endbeing providedwith a peripheral seat, an insert provided' with afbody' portion `forrned :at one end with a seat engageable with `that of said housing, said lbody portion being substantialllr cylindrical in cross section but with a'faceinclined to theplane of saidseatfsaid insertbeing provided with a passage` communicating with said have used rare'wo'rds of vdeendthereofand'with said inclinedface-and with i a valve seat and a valvernember mounted thereon adaptedto close said passage, said housingbeing provided with two inwardly'extending lugs, the spaces between which are unequal peripherally of saidl housing, said lugs being engageablerwith said body portion, the spacing of said lugs from the and peripherally thereof, being such as tofpermit'fsaid' insert to seat against said housing when saidinsert engages said lugs `and is yreceived within the wider space between the two.

2. In a check valve, a horizontally extending housing open at oney end, said endbeing provided with. a peripheral seat, an insert comprising a body portion provided with a longitudinally extending passage and provided with a iirst seat engageable with the seat on said housing, said body portion being provided with a valve seat inclined upwardly and rearwardly from the lower tapered end ofsaid body portion towards said first `seat thereon when said insert is in operative position in said housing, a valve hinged at its upper portion to said body portion and engageable with said inclined seat,` said housing being provided with two inwardly Yextending lugs, the spaces between which are unequal pe-ripherally of said housing,sai`d lugs being engageable with end of said housing and with the' body portion'` the end of said housing and peripherally thereof,

being such as to permit said insert to seat against said housing when said insert engages said lugs and is received within the wider space `between the two.

3. In a check valve, a horizontally extending housing open at one end, said end being provided with a peripheral seat, an insert comprisingv a body portion providedA with a longitudinally extending passage and provided with a iirst seat engageable with the seat on said housing, said body portion being provided with a Valve seat inclined upwardly and rearwardly from the lower tapered end of said body portion towards said first seat thereon when said insert is in operative position inl said housing, a valve hinged at its upper portion to said body portion and engageable with said inclined seat, said housing being provided with two inwardly extending lugs, the spaces between which are unequal peripherally of said housing, said lugs being engageable with said body portion, the spacing of said lugs from the end of said housing and peripherally thereof, being such as to permit said insert to seat against said housing when said insert engages said lugs and is received within the wider space between the two, and means engageable with the open of said insert for closing the end of said housing and for retaining said body portion in operative position in the open end of said housing.

4. In a check valve, a valve housing open at one end provided at said end with a peripheral seat, an insert receivable. within said housing and comprising a body portion provided with a longitudinally extending passage and having a first seat engageable with said seat on said housing, said body portion being inclined at its end opposite to said rst seat, a valve seat surrounding the orifice of said passage at suchinclined end, a valve member mounted on the inclined end of said body portion and adapted to fall by gravity against said valve seat when the parts are in correct relative positions, the interior of said housing being provided with means interengageable with the forward inclined end of said insert when the seat on said insert engages said seat on said housing and constructed and arranged to prevent relative rotation between vsaid insert and said housing when said seat on said insert engages said seat on said housing.

CLAUDE G. BORDEAUX. FORREST S. WHITE.