US1495979A - Engine valve - Google Patents

Description

Jun 3, 1924. 1,495,979

'R. H. BAUR ENGINE VALVE I Filled March 26. 192] 2 Sheets-Sheet 1 Juhe 3, 1924.

1,495,979 R. H. BAUR ENGINE VALVE Filed March 26. 1921 v 2 Sheets-Sheet 2 Patented June 3, 1924.

I NITED. STA

RAYMOND H AUR; or. ignninwon'rn, ms'rm cr, orj dommm.

, 11 mm VALVE} 5 Application fiiea'iri' h 26,1921 s'eriai'no. 455,762.

T 0 all whom it may concern:

Be it known that I, RAYMOND H, B AUR, a citizen of the United States, residing at Keiiilworth, in the District of' Golumbia,

have invented certain new and useful Improvements in Engine Valves, of which the following is a specification, reference being had therein to the accompanying drawing. This invention relates to certain new and useful improvements in engine valves and pertains more particularly tothe type commonly employed in connection withinternal p of preventing carbon or otherdep os'its from accumulating between these parts. It is-[ae ln owledged by thoseskilled in this particular art that carbon deposits I between ,fltlie valve face and its seat not only prevent the u 'attac lust-ration shown in Figure 1.

proper closing of the valve, but. in course of time will pit the valve face or its seat to such an extent that they are beyond the point of repair, thereby; requiring-the complete change of these 'parts. The present inven-,

tion, therefore, aims to revent accumulations of any foreign su stances, such as carbon, etc., by causing a slighte'or positive rotative movement to. the valve stem just as the same is seating, thereby grinding or reducing any interposed matter. y

.Another object of the invention resides in the novel manner 'ofimparting the oscillatory movement to the-valve stem, which, in this case, is of gradual actingcharacter during the unseating of thevalve, but abrupt during the seating action thereofr This is desirable for the fact that the relative movements between ,the valve seat and the face of the valve is required to be assured-just as the valve is entering or closingupon its seat. 45

provide a locking key, which not only retains the spring abutment in place on the A; further' object of the invention is to valve stem, but also constitutes, an active part of the mechanism for transmitting the reciprocations thereof.

tion resides in the manner of housing or en- .desired motion to the valve stem during the closing the valve stem and the mechanism mounted therein within a bushing or sleeve,

which not only prevents, to. a certain eirtent,

accumulations of dustand dirt thereon, but

also acts as'a'shieldfto avoid maliciousta'mpering with the enclosed arts.

lVhile in-the fore oing t iere has been'set 'fortli'so'meo'f theadvantages gained by the use of the invention, it is,'0f course, under- 7 stood that othe'rs will readily suggest'themselves-to mechanics skilled in this particular art when reading the following specification in connection with the attached drawings. ,In' the drawings there is shown the referred embodiment of the invention, but they should be'considered only as illustrative ,f of "the attaclun'ent' and not 1 in a limiting sense, as icertainivariat'ions may be resorted to without'sacrificingj 'any :of the spirit of -the i'nv'eIi libn., '11: i t

"" fsim'ilar 1 letters of I reference indicate like "parts in thedraw rigs,"in 'wh1ch:-

Figure .1 '1s aQtransvers'e. section taken through aneugiiie cylinder and showing the attachment-in positionion thevalve stem,

' vFigure 2, is detail sectional view of the uncut taken at right angles to tlie'il- Figure 3 is a perspective'view of the lockino'key.

igure 4 is "a transverse section line H ofFigurejQQ Figure 5 isa perspective view of the locking'member which'is'adapted to coact with the cross key. I

Figure 6 1S3 modified perspective view of the spring abutment.

Considering'the drawings more in detail, there is shown at 1 an engine cylinder halvtaken on ing attached to the side walls thereof the with valve seats 3. Within the cylinder'l is arranged the'piston 4 and covering the upper end of the cylinder is a removable plate designated 5. This plate 5 is detachably secured to the engine by securing bolts 6. For the purpose of better illustrating my invention, there is shown inlet and exhaust conduits designated 7 and 8, respectively, which in turn communicate with'oppositely disposed valve"casings 22,*as shown in the drawings. These valve casings 22 are angularly arranged-on the side walls'of the engine or cylinder 1, which'has been found @to Work to anadvantage' in .uniformly distributing the heat to the exposed ends of the valve disks. This arrangement also permits the use of a relatively shallow cover plate asshown in the drawings, which when detaclied from the engine ,completely exposes'theentire upper an-e1. of the cylinder and the valve casings. It is, of course, understood that the attachment may be employed on any standard type of valve now on the market, whether the same be in an overhead or L-type of engine valves.

Slidably arranged within each casing 2 is a valve stem 9 having at one end thereof a header disk 10 which is adapted to coact with the valve seat 3 in the casing 2. Through a suitable aperture in the valve stem and projecting beyond the sides thereof is arran ed a cross key designated 11. This cross Eey has a central enlarged portion 12 which is adapted to conform with the cross area of the valve stem 9. Arranged upon the valve stem and above the cross key 11 is a locking. member designated 13. This locking member is provided with oppositely disposed slotted portions 14; which are adaptedto register or interlock with the cross key 12. Positioned above the locking member 13 and frictionally resting thereagainst is a spring abutment designated 15, between; which and the under face. of the casing is interposedacoiled spring 16. This spring. 16 tendsto force the valve to its proper seat when, the v alve is relieved, from lts ositive or mechanical lifting member.

ured to the under face of the valve casing 2 inanysuitabIe manner is a bushing or sleeve memberI'indicated at 17. This sleeve member acts as a housing or casing to the mechanism mounted on the valve stem and therefore prevents accumulations of dust or any other foreign matter on said mechanism. This bushing or sleeve 17 is provided with oppositely disposed slotted portions as indicated at 18, one side wall of this slot being of gradual tapering formation as at 19, while the opposite wall has a straightened portion indicated at 20 and an abrupt curve as at 21.

The extended portions of the cross key 11 are reduced as shown at 22, upon which a bushing 23 is -mounted for the purpose of rotatably supporting rollers or sleeves 24. The sleeves as well as the bushings are maintained in position on the reduced arm 22 of the cross key 11 by a washer secured in positionby a cross key 26 entering an aperture27 in the ends of the key.

As shown in Fig. 6 of the drawings the spring abutment 15' may be provided with oppositely extending slotted portions 2828 in the base thereof for the purpose of interlocking with the cross key 11. When this form of abutment is used the locking member 13 is eliminated from the structure.

In operation the device will function as follows:

'When the tappet, or other mechanical means, exerts its lifting action upon the valve stem 9, the rollers or sleeves 24:, which.

mg of a minimum number of parts which are secured to'the extended portions 'of the cross key 11, will ride within the slotted portions 18 and against the gradually tapering wall 19 and thereby effectively move the valve stem in one direction about its longitudinal axis. The torsional action of the spring, incidental to the reciprocatory movements of the valve has little or no effect upon oscillating the valve stem. This is accomplished in the present case by loosely mounting the abutment 15 011 top of the locking member 13 which permits the member 15 to have a relative rotary movement about the valve stem. On the return stroke of the valve, due to the action of the expansive spring 16, the rollers or sleeves 24 will not contact with the opposite side wall ofithe slotted portion 18 until they are adjacent, their lowest. point of travel, at which instance they will en age the abrupt curved portion 21 and there y transmit to the valve stem at relatively rapid rotative impulse just as the valve is coming to its seat. Theinventio-n' as a whole is one consist-' are easily attached or detached to or from the valve without the requirement of a skilled mechanic and which maintains the effective part of the valve always in its" highest state of efliciency, and therebypermits the successful operation of the engine.

What I desire to claim by U. S. Letters Patentisr- 1. A valve of the character described, the combination of a valve chamber having a seat therein, a reciprocatory valve stem having a disk on one end thereof adapted to coact with said seat, and means for positively imparting a gradual rotative movement to said stem during one of its reciproeatery movements, and a. more rapid rotation thereof in the opposite direction during its opposite reciprocatory movement.

2. A valve of the character described, the combination of a valve chamber having a seat therein, a reciprocatory valve stem having a disk on one end thereof adapted to coact with said seat, and means for posi- A tively imparting a gradual rotative move-' ment to said stem durin its lifting action "and a more rapid rotation thereto in the opposite direction duringits seating action.

3. A valve of the character described, the combination of a valve casing having a sea-t therein, a valve stem provided with a disk at one end thereof adapted for coaction with said seat, a cross key afiixed to said'valve stem, an abutment keyed to said cross key, a spring interposed between 'said abutment and the valvecasing for forcing the valve disk upon the seat, and means coac-ting with the ends of the cross key for positively imparting a gradual axial rot-ative movement to said stem during one of the reciprocations thereof and a U0 more rapid rotative movement to the valve stem in the opposite direction during the opposite reciprocatory movement.

4:. A valve of the character described, the combination of a valve casing having a seat therein, a valve stem provided with a disk at one end thereof, adapted to coact with said seat, a member afiixed to the valve stem and having oppositely extending portions, a spring surrounding the valve stem and interposed between said affixed member and the valve casing, 21. bushing surrounding the spring and provided with means coactive with the extended ends of the ailixed member for imparting a gradual rotative movement in one direction to the valve stem during one of its reciprocatory movements and a more rapid rotation thereof in the opposite direction during the opposite reciprocatory movements.

5. A valve of the character described, the

combination of a valve casing having a seat therein, a valve stem provided with a disk at one end thereof adapted to coact with said seat, -a member afiixed to the valve stem and having oppositely extending portions, a spring surrounding the valve stem and interposed between said affixed member and the valve casing, a bushing enclosing the spring and provided with oppositely directed slots therein for the reception of the extended ends of the afiixed member whereby oscillatory motion is transmitted to the valve stem during the reciprocations thereof, one wall of the slot having a gradual curve throughout the length thereof and the opposite wall of the slot having an abrupt curve adjacent one end thereof..

In testimony whereof I hereunto aflix my signature.

RAYMOND H. BAUR.

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