USRE20722E

USRE20722E - Blade anchoring wedge

Info

Publication number: USRE20722E
Authority: US
Priority date: 1936-11-30
Publication date: 1938-05-10
Also published as: US2096472A

Description

May 10, 1938. J. w. SCHMIDT BLADE ANCHORING WEDGE Original Filed Nov. 50,-1936 m, m M f Reiaued May 10, 1938 UNITED STATES PATENT. OFFICE BLADE ANCHORING WEDGE Joseph W. Schmidt, Milwaukee, Wis.. assignor to Wetmore Reamer 00., Milwaukee, Wis., a cornotation of Wisconsin Original No. 2,096,472, dated October 19, 1937,

Serial No. 113,324, November 30,1936. Application for reissue February 12, 1938, Serial No. 190,310

Claims. (Cl. 29-105) This invention relates to improvements in blade anchoring wedges, The invention has particular application to wedges for the retention of blades inserted in a reamer or other rowedge and with the tool body 8, to maintain an operative connection between these parts.

Any desired means, such as the polygonal socket [2, may be provided for the reception of 5 tary cutting tool. a wrench suitable for the manipulation 01' the 5 It is the primary object of the invention to adjusting screw.

provide a blade anchoring wedge with adjust- Iclaim: ins means whichls not only adapted to seat 1. In a device ofthe character described, the the wedge for the retention of the tool, but is combination with a tool body having a longitualso adapted to provide support for the wedge dinal slot upon it p p y and provided with 10 when the wedge is free of the tool, and to release an inclined bore intersecting the slot, ci a tool the wedge from clamping engagement with the blade in the slot, a generally cylindrical wedge tool and thereby to obviate the necessity for usreciprocab e in t e e a d having o vfi ing a hammer for the release of the wedge. face finished for clamping engagement with 16 More specifically, Ipropose to adjust the wedge said blade, an adjusting screw for said wedge in both directions by manipulation of a right having right and left hand threaded portions, and left hand screw, in threaded engagement one of said portions being of reduced diameter both with the wedge and the body of the tool, as compared with the other, one of said portions whereby to accomplish the functions aforesaid. being in threaded connection the we m In the drawing: and the other being threaded c mection with 20 Figure 1 is a fragmentary side elevation 01' a rotatable cutting tool embodying the invention.

Figure 2 is an end elevation of the tool, a por tion thereof being broken away to a section exposing the wedge adiustin'g means.

Like parts are identified by thesame reference characters throughout the several views.

My improved tool comprises a body portion 3 having suitable slots 4 in its periphery for the reception of renewable tool blades 5.

The bores 0 intersect the slots 4 and are equipped with generally cylindrical wedge members I, having their faces flattened at 8 for engagement with the respective tool blades 5.

clined face converging inwardiy toward the i ing bearing against said face and said body.

2. The combination tooi body, having a peripheral slot provided with awedge opening intersecting the tint and having a '0! a tooi blade in the slot, wedg in the on is an adjusting screw for the wedge right and left hand threaded portions, the nor said screw engaged the wedge being relatively large diameter, and a portion said screw engaged in the tool body being of smaller diameter, the larger portion 01' said screw haw ing a terminal socket adapted. to receive a From t bottom f each b 5 there t wrench for the manipulation 0f the screw. 35 into the body oi the tool a tapped socket 9 to An anchor wedge assembly comprisinga receive the smaller threaded end oi an adjustwedge shaped anchor block having screw ing scr w in The wedge 1 has an an threaded bore extending through the block in gned apert h the direction in which its sides converge, in comure w ich is oppositely threaded to receive 40 the larger end of the adjusting screw bination with a block anchoring screw having 40 The respective ends of th a first portion extending through the bore and in e adjusting screw have m ht screw threaded engagement with the block and g and left hand threads, as illustrated. In come a second portion of reduced diameter and threadquence, the rotation of the screw in one m M ed in the opposite direction, said reduced portion 5 rec on will draw the wedge I downwardly into being adapted to pass freely through the bore bore 8 to seat its face 0 in clamping engagement into engagement th a, smaller threaded bore with the tool blade 5. The opposite rotation of in a t d support into which the wedge the adjusting screw will force the wedge from may be drawn with p ogressively increasing its binding engagement with the tool blade and pressure when the screw is turned in one direcwill gradually withdraw the wedge to a position tion, and from which it may be forced when the 50 where the tool may readily be removed and rescrew is turned inthe other direction. placed. Even when the wedge is free of the 4. An anchor wedge assembly comprising the tool it cannot iall from the bore 0, in which it combination 01' a wedge shaped anchor block operates, since the threads of the adjusting formed for entry in a correspondingly contoured a screw will remain in engagement, both with the socket in a support at one side of a device to be 56 anchored to such support, said anchor block having a bore extending through the block in the general direction of convergence of its side faces, and a screw having one portion in threaded engagement with the block within the bore and another portion 01' reduced diameter, adapted to pass loosely through the bore and provided with differently pitched threads for engagement in a correspondingly threaded bore in the support.

5. In a device of the character described, the combination with abody providing a seat for a part requiring to be anchored in said seat, of-a wedge movable to and from anchoring pressure engagement with said part, said wedge and body having aligned apertures of different diameters and provided, respectively, with threads of differing pitch characteristics, and an adjusting screw in the aligned apertures of the body and a the wedge, provided with portions of different diameters complementary to the respective apertures and having differential threads complementary to the threads of the wedge and body, respectively, the thread differential being such that in one direction of screw rotation the wedge may be drawn toward said body into retaining engagement with said part, and in the other direction of rotation the wedge may be withdrawn from said body and from retain ing engagement with said part.

JOSEPH w.