US1401752A

US1401752A - And wehnee

Info

Publication number: US1401752A
Authority: US
Publication date: 1921-12-27
Anticipated expiration: 1938-12-27

Description

J. A. BERTRAND.

APPLICATION FILED NOV. 19,19l9- RENEWED OCT-24,1921- Fig '1.

WIN/81958 Patented Dec. 27, 1921.

INVENTOR fa/1'42 uZBeTZTQW A TTORNEYS UNITED S E'ATES;

FTEENT FEEE.

JOHN ANDREW BERTRAND, 0 LOS ANGELES, CALIFORNIA, ASSIGNOR TO ASBU'RY REED, OF LOS ANGELES, CALIFORNIA, AND W'EHNER A. KOCH, OF SAN FRAN- CISCO, CALIFORNIA.

REAMER.

Application filed November 19, 1919, Serial No. 339,077.

To aZZ whom it may concern.

Be it known that I, JOHN A. BERTRAND, a citizen of the United States, and a resident of Los Angeles, in the county of Los Angeles and State of California, have invented certain new and useful Improvements in Reamers, of which the following is a specification.

My invention is an improvement in reamers, and has for its object to provide a device of the character specified, especially adapted for reaming bearings of any character, wherein a guide is provided capable of expansion and contraction, to fit within the bearing, and having a cutter blade also capable of expansion and contraction with respect to the guide for reaming the hearing.

In the drawings:

Figure 1 is a front view of the improved reamer,

Fig. 2 is a longitudinal section.

In the present embodiment of the invention a mandrel is provided of tapering form, intermediate its ends as indicated at 1, and having

cylindrical ends

2 and 3. This mandrel is longitudinally grooved as indicated at 4; for receiving the blades 5, as many being provided as may be necessary or desired, and it will be noticed that the bottoms of the grooves are tapering on the same angle as that 'of the peripheral surface of the body of the mandrel. The rear or inner faces of the blades are inclined, so that when said inner or rear edges are in engagement with the bottoms of the grooves, the outer or front edges of the blades will be parallel with the axis of the mandrel. Each blade has its upper end reduced on the outer edge, as indicated at 6, and these reduced portions are threaded as shown, for engagement by a nut 7 in the form of a ring, encircling the end 2 of the mandrel in an annular groove 8. In order to position the nut 7 in place in the annular groove 8 the nut 7 is split vertically and sprung over the end 2 of the mandrel, and slipped down into position in the annular roove 8. 15 is a loose collar encircling the nut 7 and serving to retain the split nut 7 in engagement with the reduced threaded portions of the blades 5. It will'be obvious that when the ring is turned in either direction, the blades will be moved longitudinally of the mandrel, and in so moving Specification of Letters Patent.

Renewed October 24, 1921. Serial No. 510,099.

they will be moved radially outward or r: dially inward, depending upon the direction of the turning of the nut.

A. guide 9 in the form of a sleeve encircles the portion 1 of the mandrel, and referring to F1g. 1 it will be seen that this sleeve is slotted longitudinally as shown at 10 and 11. The slots are in two series, the slots 10 extending from the upper end of the sleeve to near the lower, while the slots 11 extend from the lower end of the sleeve to near the upper. The slots of one series arealternately arranged with respect to the slots of the other series, and each slot opens at its inner end into a circular opening as shown. The sleeve is of resilient material, and it will be evident that when it is moved upward toward the large end of the tapering portion of the mandrel it will be expanded, while when it is moved downward toward the small end its natural resiliency will cause it to contract. The blades or bits 5 are arranged in the slots 10. There may be one or more blades or bits 5 used on the reamer. In Fig. 1 of the drawing I have shown one blade or bit 5 in one of the slots 10. In the other slot 10 is a key 14:, the upper face of which should not project beyond the periphcry of the sleeve 9. The sleeve is moved by means of a nut 12 at the lower end of the mandrel, the nut encircles the mandrel and has threaded engagement with the portion 3 thereof below the sleeve, a collar 13 being arranged between the said lower end of the sleeve and the nut, and the nut has radial openings for receiving a tool for turning the nut.

In operation, the reamer, contracted, is inserted in the bearing to be reamed, and the guide is expanded until it gently touches the wall of the bearing, the sleeve being adjusted by means of the nut 12. lVhen the guide or sleeve is properly expanded, the cutter or cutters are adjusted by means of the nut 7 The reamer is now turned, in any suitable manner to remove a thin shaving from the bearing wall, and the process is repeated as often as necessary. While the reamer clescribed is for general application it is intended principally for reaming out worn journals or bearings which are no longer true cylinders. The' reamer is especially adapted for truing automobile bearings, such and will bearing.

I claim:

1. A reamer having a tapering body and cylindrical ends and having longitudinally extending guides for cutters, the bottoms of the grooves being inclined outwardly toward one end, bits movable in the grooves and having reduced threaded ends, a nut journaled on one of the cylindrical portions and engaging the threaded ends of the hits, a sleeve encircling the bits and splitv ion tudinally to provide resiliency, and means for moving the sleeve longitudinally of the mandrel.

2. A device of: the character specied, comunted to 1 prising a tapering manor-cl, bits me move longitudinally of the mandrel, means for moving the bits, a guide sleeve fitting closely about the mandrel and resilient and having slots through which the bits may extend, and means for me big said guide longitudinally of the mandrel to expand and contract the same, said moving means comprising a nut'threaded on to the small end of the mandrel and engaging the end of the sleeve.

3. A device of the character specified, comprising a tapering mandrel, bits mounted to move longitudinally of the man drel, means for moving the hits, a guide sleeve fitting closely about the mandrel and resilient and having slots through which the bits may extend, and means for moving said guide longitudinally of the mandrel to expand and contract the same, the moviin means for the bits comprising a threaded collar, the bits having threaded extremities engaged by the collar.

'-l. A device of the character specified, comprising a tapering mandrel, bits mounted to move longitudinally of the mandrel, means for moving the hits, a guide sleeve fitting closely about the mandrel and resilient and having slots through which the bits may extend, and means for moving said guide sleeve longitudinally of the mandrel to expand and contract the same.

5. A device of the character specified, comprising a tapering mandrel, a resilient guide sleeve mounted to move longitudinally of the mandrel to expand and contract the sleeve, and bits movable longitudinally of the mandrel to expand and contract said bits, the sleeve having slots through which the bits extend.

G. A device of the character specified, comprising a mandrel, an expansible sleeve mounted on the mandrel and adapted to be expanded 'or contracted, a bit projecting through said sleeve, and means for advancing said bit radially from the'axis of the mandrel.

7. A device of the character specified, comprising a mandrel, an expansible sleeve mounted on the mandrel and adapted to be expanded or contracted, means f'ior expand ing or contracting said sleeve, bit p ojecting through said sleeve, and means i r advancing said bit radially "from the axis of said mandrel.

8. A device of the character specified, comprising a mandrel, an expansible sleeve mounted on the mandrel to is expanded or contracted and having slots parallel to the axis oi said mandrel, a bit positioned in one 0t said slots and projecting from r .l( sleeve, and means for advancing said bit radially from the axis of said mandrel.

.9. A device of the character specified, comprising a mandrel, a sleeve mounted on said mandrel, means for expanding or contract ing said sleeve, said mandrel and said sleeve each having a longitudinal slot in alinement with each other, a bit positioned in said slot and projecting from said sleeve, and means for advancing said bit 'adially from said sleeve.

10. A device of the character specified, comprising a mandrel, an expansible sleeve mounted thereon, said sleeve having longi tudinal slots extending from one end of the sleeve to a point spaced from the other end of the sleeve, said slots being alternately arranged extending from opposite ends of said sleeve, means for expanding or contracting said sleeve, and a bit mounted in said mandrel and projecting through one of said slots.

11. A device of the character specified,

comprising a mandrel, an expansible sleeve mounted thereon and adapted to be expanded or contracted, and a bit projecting through said sleeve.

12. A device of the character specified, comprising a mandrel, an expansible sleeve mounted for longitudinal movement on said mandrel, means for expanding or contracting said sleeve, a bit projecting through said sleeve, and means for advancing said bit radially from the axis of the mandrel.

JOHN ANDREN BERTRAND.