US1641824A - Tool - Google Patents

Description

TOOL

Filed Jan. 25. 1926 FIGURE! 4:

mvlsn'rohs Patented Sept. 6, 1927.

till

TES

PATENT OFFICE.

THEODORE A. PIEHN AND GUSTAVE HEER, OF SAN JOSE, CALIFORNIA.

TOOL.

Application filed January 25, 1926.

This invention relates to a tool particularly adapted for use in resurfacing valve seats and counter-boring the same.

It is one object of the invention to provide a tool of the character indicated which can be readily inserted through an opening of given diameter and then extended to contact with the metal to be worked, and finally locked in an extended position.

It is another object of the invention to provide a tool of the character indicated wherein the cutting blades may be quickly and easily extended and retracted as desired, and quickly and easily locked in any desi red position.

It is still another object of the invention to provide a support and locking means for the blade that will hold the same perfectly rigid when in use.

It is also an object of the invention to provide a tool of the character indicated that is simple in form and construction, consists of few parts easily assembled and disassembled, economical to manufacture, and highly efficient in its practical application.

In the drawing Figure 1 is a side elevation of the tool.

Figure 2 is a section on line 2-2, F igure 1.

Figure 3 is a section on line 38, Figure 2, with the cutting blade partly extended,

Figure 1 is a section on line 3-3, Figure 2, with the cutting blade entirely extended.

Referring more particularly to the drawing, we show at 1 a cylindrical bar forming a the body portion of the device, threaded as at 2 near its upper end and provided with an orifice 3 to receive a handle bar I.

Mounted upon the opposite, or lower end of the bar 1, and forming an integral part thereof, is an enlarged portion 5 having the following characteristics.

The portion or boss 5 is concentrically arranged on bar 1 and is provided with an F upper surface 6 lying in a plane at right angles to the longitudinal axis of the bar 1. At 7 is shoWn an annular channel formed in the upper surface 6 in concentric relation to bar 1, the bar 1 itself forming the inner wall of the said channel. At 8 is shown a slot cut through the boss 5 and bar 1 in a plane lying at right angles to the longitudinal axis of the bar 1, the inner side of the said slot lying in the axial plane of bar 1, and the outer side of the slot being in substantial alignment with a plane tangential Serial No. 83,622.

to the outer surface of the bar 1. A conical threaded socket is formed in the bottom of the boss 5 in axial alignment therewith, and this Socket is fitted with a threaded and split nu At 10 we show a short bar rectangular in transverse cross-section and adapted to engage and slide easily in the slot 8. This bar is provided with a cut-ting edge at 11, and has a groove 12 formed transversely in its upper side.

At 13 is shown a cylindrical sleeve fitted snugly over bar 1 but freely and easily revolved thereon. A nut is threaded on to the bar 1 as shown at 14, the threaded part 2 on bar 1 being so positioned as to permit screw- 1 ing the nut 14 down tightly on sleeve 13.

In the lower end of sleeve 13 is formed a hole 15 lying parallel with the bar 1. In this hole 15 is placed a pin 16 having an end 17 bent laterally to engage the groove 12 in bar 10 is clearly shown in Figures 2, 3 and 4.

The device having been assembled as described, the nut 14 is loosened and the sleeve 13 rotated contra-clockwise. This movement causes the bar 10 to slide in slot 8 until it is entirely contained in the said slot, through the engagement of the pin 16 therewith. The pin 16 is revolubl mounted in the hole 15 so that when the s eeve 13 is rotated the a pin is carried around in channel 7 with its lower angular end 17 moving in a horizontal plane. Since the end 17 engages the bar 10 the latter is forced to move with the pin 16.

A pilot rod 18 having one end inserted in the split nut 9 and with the nut tightened up in its socket in boss 5, is now positioned in the valve stem guide 19 in casing 20. The sleeve 13 now being rotated in a clockwise direction the bar 10 is extended until it engages the valve seat 21 through the medium of the pin 16 as above described. The bar being properly positioned for cutting, the sleeve is forced down into positive contact therewith by screwing up the nut 14: against its upper end.

In setting the cutter bar 10 it may be observed that it is merely necessary to loosen the top nut 14 whereupon the bar may be accurately adjusted as desired, the movement of the sleeve 13 being accurate and under perfect control. WVhen the bar is extended as far as may be the lower end of the pin 16 contacts with the inner side of the slot 8 and thereby prevents the bar from being so far extended as to lose its necessary leverage in the holder.

Since the pin 16 may be swung through an arc of nearly one hundred and eighty degrees a Wide range of adjustment for the cutter is secured. The cutter may be securely locked in any desired position by merely tightening up nut 14 against sleeve 13, thereby rendering both sleeve and cutter immovable relative to bar 1.

The advantage of mounting the pilot 18 in boss 5 by means of a split conical nut is that bars may be provided for all sizes of valve stem guides, the various sizes being adapted for use with the one size nut by turning down a short distance from one end as shown.

It is to be understood, of course, that While We have herein shown. and describedbut one specific embodiment of the invention, changes in form, construction, and method of application may be made Within the scope of the appended claims,

We claim 1. A tool of the character described, comprising a supporting bar and means for mounting a pilot rod therein, a cutter bar mounted therein to move transversely thereof and having a slot formed in its upper surface transversely thereof, a sleeve revolubly mounted on said supporting bar. apin revolubly mounted in said sleeve parallel With its axis of rotationand havin a: lateral extension adapted to engage the slot in said cutter bar, and a nut threaded on to said supportingbar to engage said sleeve;

2. A tool. of the character described, comprising a supporting bar havinga: boss formed on one end thereofinconcentric relation thereto, an annular channel tormed'in the upper surface of said boss in concentric relation thereto, and having a slot formed therein transversely of sai'd'boss With one side passing through substantially the center of said bar, a cutter element slidabl'y moun ed in said slot, a pin carried by said sleeve and passing through said channel and engaging said cutter element, and means for forcing said sleeve into binding engage-- ment with said cutter element.

3. A tool of the character described, comprising a supporting bar and means for supporting a pilot rod therein, said bar having a slot formed in one end thereof and transversely thereof andhaving one side lying in the axial plane of said bar and the opposite side lying in a plane substanta-lly tangential to the outer surface of said. bar, a cutter element slida'bly mounted in 'said slot and having a slot formed in its upper surface transversely thereof, a sleeve revolubly mounted on said supporting bar and engaging said cutterelement, an angular pin revolubly mounted in, said sleeve and engaging the slot in said cutter element, a d means for forcing said sleeve into binding engagement with said cutter element;

4. A tool of the character described, comprising, a supporting barhaving a: boss formed on one end thereof in concentric re lation thereto, the said boss having a threaded socket formedfin its under surface and means for mounting a pilot rod" in said socket, an annular channel formed in the upper surface ofsaidboss in concentric relation thereto, and having a slot formed therein transversely of said boss with one side passing through substantially the center of said barn a cutter element slidablymount-- ed in said slot, a pin carried by said sleeve and passing through said channel and engaging said cutter element and means for forcing said sleeve into binding engagement with said cutter element.

THEODORE A. PIEHN. GUSTAVE HEER.

Images