US1396861A - Valve-grinder - Google Patents

Description

Patented Nov. 15, 1921.

W l J. LUCKS.

vALvE GRINDEm APPLICATION FlLED- JAN. 12, 192|: 1,396,861.'

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UNITED STATES PATENT OFFICE.

WILLIAM J'. LUCES, `0I? COLUMBUS, OHIO.

VALVE-GRINDER.

which the following is a specification.

This invention relates broadly to valve grinders, and has for its primary object to provide a valve grinder of improved and simplified construction and which `may be employed in restricted spaces with conven ience and facility, in order that the valve seats of an internal combustion engine may be accurately and smoothly ground or iinished and without requiring the removal of any but necessary parts thereof.

In the average forms of valve grinders the valve rotating stems thereof are usually oscillated by means of rotary crank structures. It is found in practice that such structures are open to the objection that the same are quite cumbersome in construe tion and require considerable space in which to effect their operation. VThis objection isquite a pertinent one, because of the fact that unless an engine is considerably dismantled, the operator of the grinder will be materially inconvenienced and hampered in successfully operating the tool, and furthermore, such operation is both difficult and laborious.

The present invention aims to overcome these and other objections in valve grinders by producing a tool which will be simple and easyto operate and one which Vwill require but a minimum of space in which to effect its successful operation.

Vith these and other objects in view, asv

will appear as the description proceeds, the invention accordingly consists in the novel features of construction, combinations of elements and arrangements of parts, hereinafter fully `described and pointed out in the appended claim.

In the accompanying drawing, forming a A art of this specification, and in which similiir characters of reference denote like and correspondingr parts throughout the several views thereof: y

Figure l is a vertical longitudinal sectional view taken through the improved valve grinder comprising the present invention, and

Fig. 2 is a horizontal sectional view taken along the line of 2-2 of Fig. 1.

Specification of Letters Patent.

`securely retained in conjunction with Patented Nov. 15, 1921.

Applcationled January 12, 1921. Serial No. 436,651.

A)referring more particularly to the details of theinvention, my improved valve grinder consists essentially of a spiral shaft l, which vin this instance is formed 'from a plurality of twisted wires, inthis instance, three in number. By this construction a shaft will be produced which will possess the requisite degree of rigidity and edectively capable of withstanding the stresses and pressures to which the shaft will be placed when in actual use. Also, by this manner of constructing the shaft a double thread will be formed, which will permit of rapid rotary motion on the part of the shaft when the grinder is operated. In order to support the shaft for oscillating movement use is made of a handle structure 2, which is formed to include a vertically extended bore or chamber 3, the latter being provided with a closed upper end and with an open lower end, the` said lower end being normally closed, however, by means of a metallic cap 4, which is adapted to be removable yet the lower end of the handle structure 2. The cap 4 is provided with an opening 5 therein, which conforms exactly with the cross sectional contiguration of the shaftfl, and by this construction it will be manifest that when vertical reciprocatory motion is imparted to the handle structure, rotation or oscillation on the part of the shaft will be effected. Then, to impart the movement of the shaft to a valve disk, the lower ends of certain of the wires constituting the shaft which are laterally bent to produce spaced lingers 6, which are adapted to the osition within the usual openings 7, provi( ed in a valve disk 8, this construction servingr as usual to permit of the forced rotation of the disk 8 upon its seat.

The upper end of the shaft 1 extends through the opening 5 provided in the cap dand projects into the bore or chamber 3 provided in the handle structure. The upper end of the shaft or stem is disposed in engagement with a metal cup 9, which is normally pressed downwardly and maintained in engagement with the upper end of the shaft by means of a coiled spring 10, the latter, in turn. being confined between the upper end of the bore 3 and the said cup 9.

downwardly, or conversely to elevate the .mental spring serves to cushion or n causing the latter to handle structure and to thus maintain the two constantly in a position bestv adapted for the application of manual pressures. If desired, the upper end of the stem or shaft may be equipped with a collar l1, between which and the cap l a relatively small and weak spring l2 is situated. This supple` arrest the descent of the shaft l, and to produce a tool whichmay be smoothly and easily operated with an absence of quick, unnatural and jerky movements.

In view of the foregoing description, it would be apparent that the present invention provides a valve grinder of improved design and construction which would be capable of operating in relatively restricted areas. It will be manifest` that in operation the said handle structure will be manually grasped and reciprocated vertically. Since the shaft l has its finger 6 in engagement with the valve disk 8, it would be apparent that such vertical movement on the part of the handle structure will result in rotating the shaft l and consequently the disk 8, be rotated relatively to its seat so that the cont-acting surfaces of the valveistructure may be smoothly ground. When the handle structure has been forced downwardly to substantially its fullest eX- tent, the same may be released so that it will automatically rise by reason of the influence of the main spring 10 and with a reversal of movement on the part of the valve disk. Thefprovision of the spring l0 thus operates to render the' construction con venient to manipulate and to effect uniform and positive rotation of the part thereof. In other words, the handle structure will not be moved down upon the shaft l to the saine position upon each given operation thus causing` the said shaft to rotate the valve to different positions, a feature which is of prime importance in valve grinder construction, in that it eliminates the presence of all carbon deposit from the seat of the valve, and also effectively eliminates carbon ridges. Therefore, forl uniformity and effectiveness in operation, tie inclusion of the springs l0 and l2 furnishes the essence of the present invention, and it is by the presence thereof that the present valve grinder is believed to constitute a distinct improvement of prior structures.

`What is claimed is:

ln a valve grinder, a spiral shaft, a handle structure having a bore formed therein arranged to slidably receive said shaft, means formed with the lower portion of said handle structure in cooperation with said shaft to effect the rotation of the latter, when said handle structure is vertically reciprocated, a main spring positioned between the upper end of said shaft and said bore and normally serving to maintain the shaft in an extended position, and a supplemental spring positioned between said first.

named means and cooperative with said shaft for resiliently arresting outward movement on the part of the shaft.

in testimony whereof I affix my signature.

WILLIAM J. Lroks.

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