A. J. SEAMAN.
APPLICATION FILED APRJO, 1913.
Ll l 59252., Patented Oct. 27, 1914.
I on a line 3 3 of Fig.
- UNITED sTATEs PATENT oEEioE.
ALBERT 1 SEAMAN, OF BOSTON, MASSACHUSETTS, ASSIG'NOR T0 ALBERT J'. GREENE, v0F BOSTON, MASSACHUSETTS.
Specification of Letters Patent.
Patented Oct.. 2t', 19141.
To all 'whom t may concern Be it known that I, AiERT J. SEAMAN, of Boston, in the county of Suffolk and State of Massaehsetts, have invented certain new and useful Improvements in Tire-Valves, of which the following is a specification, reference being had to the accompanying drawings,-forming part thereof.
This invention has reference to improvements in valves for the pneumatictubes of Wheel tires and for similar purposes.
One object of the invention is to so construct a pneumatic valve comprising a casing that said casing and the operative parts of the valve therewith may be detachably secured to the usual air inlet pipe With which the air tube of a pneumatically inflated tire is usually supplied so that such valve casing and its related arts may be removed from said air inlet pipe as a complete article.
Another object of the invention is to so construct a valve of this general nature that its relatively movable parts may be guided and controlled in an improved manner.
Other objects of the invention will appear from the following description.
The invention consists in struction of the valve stem and, in the means, in iXed relation to such valve stein for holding the valve actuating springl under compression.
rlhe invention novel features of construction and combination of parts as shall hereinafter be more fully described and pointed out in the claim.
Figure 1, represents the improved valve in elevation attached to the usual air inlet pipe of an ordinary pneumatic tire tube, parts of which are shown. Fig. 2, represents a plan view of the valve casing, wit the clap removed. Fig. 3, represents a sectional view of the complete valve as taken 2. Fig. 4f, represents a bottom plan view of the valve casingwith the valve removed. Fig. 5,'represents a plan view similar to Fig. 2 relating to a modified construction of the valve of which Fig. 6, represents a vertical diametrical sectional view of Fig. 7, and Fig'. 7, represents a ,bottom plan view thereof. Fig. 8, repre.-
the novel consupply pipe. that the lower end of the nipple member 11 'has the plug alsoconsists in such other ing sents a side elevation of the valve and its stem furnished with a different device for holding the valve spring under compression.
Similar characters of reference designate corresponding parts throughout.
As shown in the drawings the essential feature of this invention is the valve eomprising a casing and related parts forming in themselves a complete article and including a spring actuated valve stem having or provided with means fixedly mountedl on or formed in part with said stem to hold the valve actuating spring under compression;
AAs shown in the drawings a represents portions of the tire tube or other air chamber to which air is to be supplied and B the usual air inlet tube or pipe fixed to said tire tube or chamber and, in this case, said tube B having an inner screw thread. rlfhe casing 10 of this improved valve, see Figs. 1 and 3, has a cross sectional shape adapted to be engaged by a wrench or similar tool and the cylindrical end members 11 and 12 of -saidcasin 10 Aare of lessidiameter than the main mid le portion and the nipple member 11 has an external screw thread adapted to be received by the inner screw thread of the tire pipe B until the middle enlargement 10 seats itself against the end .of said pipe B, while nipple 12 is ,screw ,threaded to receive the usual connection of any ordinary air ln said Fig. v3 it will be seen p member 13 screwed therein. This member 13 has the. air passages 14C, 14:, and a central bore in which thel valve stem 15 is slidable. Thevalvestem 15 has the integral valve lexterior to the plug member 13 and furnished with the rubber pack- 1'( adapted to close against said plug member 13- and, at its upper end the valve stem 1-5 is screw threaded. Within the casing 10 is located the coil spring 18 which rests on the plug member 13 and is held under compression by the spider member 19 whereby the action of said spring 18 tends constantly to hold the packing 17 and valve 16 in the closed position. Cap 20 is adapted positively to hold the valve 16 in the closed position at times and for such purpose this Cap 2 0 has the internally screw threaded bore vof the valve casin Y' fgagement vof these parts is4 eifected.A After such assemblage of the parts referred to the socket 21 of adiameter to be received in the and having its screw thread engaged' with the thread of "alve stem .16 whereby said cap 2O Ymay be screwed onto said valve stem until the capl bears against the end of nipple member '12 after which the continued rotation of said cap vwill draw the stem 15 and its valve 16 Vin a direction vto positivelyhold the packing 17 against theend-of member 11 to .close the air passages 14, 14. a As spider member 19 is fixed on said valve stem 15 the parts are assembled by first passing'said valve stem through the bore of plug member 13,y then placing spring 18 over said stem`15 and against said plug member and then forcing the'spider member 19l on to valve stem to hold spring 18 under compression whereby, as the bore of said spider member is smaller thanthe valve stem 15 a close frictional envalve stem 15 with the spring 18 and its spider 19 are introduced into the open end n ofnipple member-'11 until plug member- 13 comes into engagement with the inner screw thread of said nipple member whenl said i a plug member 13 is screwed into said nipple 'l' member. The cap 20 is now screwed onto '13.0
thevalve stem 15, as is shown in said Fig. 3
-and may be screwedvto position to draw y'valve stem 15) 'positively in the closing ,..gdirectionp V i InFigS, 5, 6 and 7 is shown a modifica`- furnished with the rubber packing 25. In
'y 5gltion of the 'invention relating more particularly tothe valve casing in which thenip- .pplejmember 11"*of said casing has formed 11i-part therewith the inwardly extending segmental arms 22, '22 the inner ends of which 'form a guide'for the valve stem y23 having fixed to its outer end the valve 24 assembling this modified orm the valve 24swith its packingis secured to the end of stem'23 which stem'jisthen passed'endwise through the' axial guide? between the ends'of arms 22, 22. s The spring 18 is now placed vin the bore of the valve casing and rests on" vthe arms 22 and the bore of spider 19 is now engaged withthe screw 'threaded end of valve stem' land is forced downward by means of a suitable tool adapted to enter the bore of the valve casing, until said spider compresses .said spring somewhat so that Said springv tends constantly to hold said valve stem and its valve in the closed position. -f
In the modification shown in Fig. 8 is iisclosed a valve stern havinga fixed mem er for holding the valve actuatlng spring under compression. In this construction the valve stem 26 has a transverse slot located at a suitable distance from its valve 27 `and in said 'slot is mounted the transversely extend-l ing spring 28 which may be inserted through the spaces between the arms 22, 22 of the structure shown in4 Fig. 6, while the stem 26 is slidably engaged with the inner ends of said arms. When said valve stem 26 'is thus in place in the valve casing a coil spring 18 is inserted into saidcasing through the nipple end' 12 and is forced downward against the free ends of said yielding spring holding member 28 which fr.e ends yield and permit `the passage of said spring 18 but, after such passage, spring to position to enga-ge and hold said spring 18 under compression. This may be accomplished as the pressure exerted by spring 18 is comparatively slight and is not suiicient to effect the bending of the spring member 28 to a point at which spring 18 can slip over said member.
The operation of this valve will readily be understood by reference to the drawings. First cap 20 is removed and an air supply pipe is attached to nipple member 12. The inflowing air passesV between the arms of the spider and through the air passages in the'valved end of the casing and the pressure of such air is of course suiiicient to press the valve away from the end of the f valve casing against the action of the valve actuating spring. When the pressure of the iniowing air is suiHc-iently reduced the valve lsprmg acts to move the valve to the closed position. The air supply pipe is now removed from nipple member 12 and'cap 20 is replaced and screwed on to the valve stem to draw and hold v'said 'stem positively in the closed position in which the valve will hold 'fits packing against the end ofthe valve cas- Itis not my vintention to limit my invention in any way to a specific construction as regards the manner of mounting the valve and the spring holding device on the valve stem as it 'isimmaterial to the successful operation of the valve whether the valve be integral with the valve stem or secured to such stem. The'sole limitation as to these parts is thatthe spider or device for holding the valve actuating spring under compression is in fixed relation to the valve stem and by the expression fixed relation I mean such that said spider or, device is so fixed, secured or mounted on the valve stem that neither the rotation of said stem nor .the vibration of the valve actuating spring can effect a relative movement between said spider or device and the valvestem.
d Having thus described my invention I' claim as new and desire to secure by Letters Patent:
A tire valve of the nature described comprising a casing having at one end a valve seat furnished with a central guide-and` air passages, a valve Stem slidable in said gulde 1,115,252' v l w Q.
l and having an exterior integral valve and stem whereby said valvestem can be drawn a screw threaded inner end, a spider lfixed to in a direction to positively hold said'valve i said valve stem, Ja spring located Within in the closed positmn.
said casing and acting against said spider ALBERT J. 'SEAMAN 5 to close said valve, and a cap having a wall Witnesses:
`to embrace said casing and an axial screwv FRED 0. WELSH,
threaded socket engaged with said valve EDGAR JP. LARKIN.