US2126789A

US2126789A - Apparatus for conditioning valves and valve seats

Info

Publication number: US2126789A
Application number: US696669A
Authority: US
Inventors: Lindsey Roy
Original assignee: Individual
Current assignee: Individual
Priority date: 1933-11-04
Filing date: 1933-11-04
Publication date: 1938-08-16
Anticipated expiration: 1955-08-16

Description

Aug. 16, 1938. R. LINDSEY 2,126,789

- APPARATUS FOR CONDITIONING VALVES AND VALVE SEATS Filed NOV. 4, 1933 2 Sheets-Sheet 1 A Z5 1 1 1:. f 1% I M v Inventor:

R. LINDSEY Aug. 16, 1938.

APPARATUS FOR CONDITIONING VALVES AND VALVE SEATS Filed NOV. 4, 1933 2 Sheets-Sheet 2 In UP]: for.

Patented Aug. 16, 1938 STATES PATENT 'OFFICE APPARATUS FOR CONDKTIONING VALVES AND VALVE SEATS '7 Claims.

This invention relates to apparatus for grinding, facing, seating or otherwise conditioning valves and valve seats, particularly the valve and valve seats in internal combustion engines.

An object of the invention is to provide a valve grinding tool of the character described which may be easily and accurately operated without dismantling the valves and attendant parts, whereby to save time, labor and expense.

Another object is to provide apparatus such as described which when in place may be efficaciously operated to grind or otherwise condition the valve only or the seat only or to simultaneously grind or otherwise treat the valve and its seat.

A further object is to provide a portable valve grinder of the character described in which the valve and valve seat treating element is rotated against the valve and its seat or the seat or the valve rotated against the element whereby an exact treatment to meet'the condition to be corrected may be carried out with uniformity and accuracy.

Yet another object is to provide apparatus such as described in which the grinding, facing, polishing or conditioning, as required, may be effected with various types of treating tools subject to ready attachment to the apparatus and without necessitating the use of objectionable and damag- 1 "ing gritty compounds, powders and the like such as are usually applied to the valve and seats.

Still another object of the invention is to provide a new and highly efficient conditioning or grinding tool shaped to permit of its ready application to the work and provided with portions which extend between the valve and its seat in such manner as to provide for a selective or simultaneous treating of the opposed surfaces of the valve and its seat and to insure uniformity and accuracy of operation thereof.

The invention possesses other objects and features of advantage, some of which, with the foregoing, will be set forth in the following descrip- ;,tion of the preferred form of the invention which is illustrated in the drawings accompanying and forming part of the specification. It is to be understood, however, that variations in the showing made by the said drawings and description may be adopted within the scope of the invention as set forth in the claims.

Referring to the drawings:

Fig. 1 is a vertical sectional view of the apparatus of this invention as when in use;

Fig. 2 is a top plan view of the apparatus;

Fig. v3 is a sectional view taken on the plane of line 3--3 of Fig. 1;

Fig. 4 is a sectional view taken on the plane of line 4-4 of Fig. 1;

Fig. 5 is a sectional view taken on the plane of line 5-5 of Fig. 1;

Fig. 6 is a bottom plan view of the grinding element or tool;

Fig. 7 is a vertical section of a modified form of grinding element;

Fig. 8 is a bottom plan view of the element shown in Fig. 7;

Fig. 9 is a side elevation of another form of element as used for reaming purposes;

Fig. 10 is a bottom plan view of the element shown in Fig. 9;

Fig. 11 is a side elevation of another type of element used for dressing and smoothing the valves and their seats;

Fig. 12 is a perspective view of a hand operated form of the invention.

One embodiment of the invention, as shown in the accompanying drawings, comprises a portable motor driven machine primarily made up of an electric motor i, a tubular motor shaft 2, a valve and valve seat grinding or conditioning element or tool 3 carried on and rotated by said shaft, and a valve engaging rod 4 in the tubular shaft 2 and whose function is to either hold the valve against rotation or to rotate the valve, as will be hereina after fully explained.

As here shown the tubular motor shaft 2 supports a chuck 5 on its lower end, said chuck having a split sleeve 6 clamped against the tubular shaft by a nut 1 whereby to fix the chuck for rotation with the shaft or to loosen it for permitting relative rotation of the shaft. A nut 8 on the shaft 2 also holds the chuck in place.

The grinding or conditioning element 3 is afiixed to the chuck by screws 9, and comprises a cylindrical body Ill telescoping the chuck and provided with downwardly and inwardly inclined tool appendages H in a somewhat conical arrangement. These appendages are spaced apart sufficient to permit the valve to be treated to be positioned within the tool, with the appendages ll disposed between the opposed faces of the valve and its seat. In Fig. 1 is shown a valve A raised above its seat B with the tool disposed as above stated in position to grind or otherwise condition the valve and seat. It should be noted that the inner and outer faces of the tool appendages are disposed at an angle of 45 degrees to correspond with the standard 45 degree angle of the present day valve and seat faces although,

if necessary, a tool with its working appendages at other angles could be readily substituted for the one here shown and described.

The type of tool or grinding element, here shown in Figs. 1 and 6, comprises three appendages each provided on its inner and outer faces with an abrasive grinding surface [2. One way of providing such abrasive surfaces is to mold or otherwise cause to be adhered to the appendages an abrasive grinding compound which becomes as it were an integral part of the tool. However, other forms of grinders may be used, as for example the carborundum wheel l4 shown in Fig. '7, wherein the wheel is shown with but two appendages l5 but otherwise is of the same form as shown in Figs. 1 and 6.

Another modification is the cutter tool shown in Figs. 9 and wherein the appendages I5 are fluted as at E6 to provide for refacing, reaming or cutting the valves and valve seats. Still another type of tool, as shown in Fig. 11, is for finishing and smoothing valves and valve seats and has its appendages l6 provided with steel rollers arranged to engage between the valve and its seat. It will now be seen that various types of tools embodying the spaced appendage construction of this invention may be readily interchangeably employed in the machine to suit the various kinds of conditioning required of valves and valve seats.

To fit the machine to the Work, as shown in Fig. 1, it is only necessary to take off the cylinder head, not shown, and the tappet cover piece, also not shown, then lift or pry up the valve to be treated with a suitable tool under the valve spring seat and insert the tool element 3, the raised valve passing between the appendages H. Next the valve spring seat is partially released and through its spring clamps the tool appendages between it and the valve seat with the abrasive surfaces l2 in close engagement with the opposed working faces of the valve and valve seat, as shown in Fig. 1. It is now apparent that the application of the machine is effected without necessitating any disassembling of the valve.

The rod 4 is now adjusted to engage the valve, it being noted that the spring I1 operates to yieldingly urge the rod against the valve. At its lower end the rod 4 carried a blade l1 removably held in a slot l8 by pin I9 and adapted to engage in the usual slot (not shown) in the top of the valve. With this arrangement the valve is prevented from turning relative to rod 4 and in cases where the valve has pin holes instead of the slot, the blade I? is removed and a properly formed holder, not shown, may be substituted.

Assuming that it is desired to simultaneously treat the valve and its seat, then the nut 1 is tightened on the conical threads 2| of split sleeve 6 to clamp the chuck 5 for rotation with the motor shaft 2. To now hold the valve against rotation in order that the tool appendage II will treat or grind equally on the valve and valve seat, it is necessary that the rod 4 be held against turning. This is done by tightening clamp 23 on the upper end of rod 4, the clamp being carried by the bracket 24 which is carried on the upper side of the motor housing 25. It should be noted that the shaft 2 extends above the motor housing and its upper end 26 is split and provided with conical external threads 21. A nut 28 is turned on said threads and when loosened the shaft 2 turns freely independent of rod 4.

On now starting motor I the shaft 2 operates to turn the tool element 3 and the appendages l I will treat equally the opposed faces of the valve and its seat. It is now seen that the valve and seat may be simultaneously ground, refaced, or smoothed as the case may be dependent on the type of tool used in the chuck 5, and that the treatment will be uniform in the valve and its seat which are both stationary during this simultaneous operation.

If it is desired to grind or otherwise treat the valve alone, then the nut 'I'is loosened to permit the shaft 2 to turn relative to the chuck 5 and tool element, whereas clamp 23 is loosened to free rod 4 for rotation. To make a, driving connection between the shaft 2 and rod 4 whereby to rotate the latter, the nut 28 is tightened and the split end 26 of shaft 2 is clamped to rod 4.

On now starting the motor 1 and upon holding chuck 5 with any suitable tool, not shown, to prevent rotation of the chuck, it is seen that the rod 4 will rotate with shaft 2 and thereby rotate thevalve whereby to grind valve upon the stationary tool appendages bearing against the valve face to be treated. In this manner the valve may be ground or otherwise treated to the exclusion of the valve seat.

To grind or otherwise treat the seat to the exclusion of the valve, the operator loosens clamp 23 and tightens nuts 28 and I. The motor drives shaft 2 and rod 4 which turns the valve and the shaft, rod and valve turn as one whereby the outer faces of the tool appendages operate against the seat only to treat it in the desired manner dependent on the tool mounted in the chuck 5.

In Fig. 12 I have shown a hand operated device comprising a crank 39 having a chuck 3! to hold the grinding or treating tool 32. This form permits of the advantageous use of the grinding and treating tools of the invention by hand.

It will now be apparent, with reference to the foregoing description and accompanying draw= ings, that the embodiments. of the invention here disclosed will provide the objects and advantages of the invention in a particularly elficacious manner.

In some instances it may be preferable to regulate the tension of the valve spring of the valve being treated. This may be done by holding the valve spring seat raised with a suitable tool, and thereby adjust the resistance to the conditioning element, a much-desired feature.

I claim:

1. In valve and valve seat conditioning apparatus, a motor, a tubular motor driven shaft, a chuck, means for operatively connecting and disconnecting said chuck relative to the shaft, a valve and valve seat conditioning element removably mounted on said chuck and arranged to be engaged with opposed faces of a valve and its seat, a valve holding rod rotatably mounted in the tubular shaft, means on said rod for engaging the valve to prevent relative rotation of the valve and rod, means for releasably holding the rod against rotation, and means for establishing a driving connection between said shaft and said rod.

2. A valve conditioning apparatus comprising an element suitable to condition a valve, so constructed as to be applied and removed from between a valve and its seat while the valve stem is in its guide, said element having a body portion and a tool member, said tool member being constructed to operate at a fixed angle to the body portion and means for rotating the valve while the valve is engaged with the conditioning element.

3. A valve conditioning apparatus comprising a motor, a valve conditioning element, a valve engaging member, and means for fastening said valve engaging member against rotating with said Valve conditioning element and means for establishing a driving connection between said motor and said valve conditioning element.

4. A valve conditioning apparatus, comprising an element suitable to condition a valve, so constructed as to be applied and removed from between a valve and its seat while the valve stem is in its guide, said element having a body por-- tion and a concave tool member, said tool member being constructed to operate at a fixed angle to the body portion and means for rotating the conditioning element while it is engaged with the valve.

5. A valve seat conditioning apparatus comprising an element suitable to condition a valve seat so constructed as to be applied and removed from between a valve and its seat while the valve stem is in its guide, said element having a body portion and a convex tool member, said tool member being constructed to operate at a fixed angle to the body portion, and means for rotating the conditioning element while it is engaged with the Valve seat.

6. A valve conditioning element comprising an element constructed so as to be applied and removed from between a valve and its seat when the valve stem is in its guide, said element having a body portion and a concave tool member, said tool member being constructed to operate at a fixed angle to the body portion.

'7. A valve seat conditioning element comprising an element so constructed as to be applied and removed from between a valve and its seat while the valve stem is in its guide, said element having a body portion and a convex tool member constructed to operate'at a fixed angle to the body portion.

ROY LINDSEY.