US1410071A - Pipe-end reamer - Google Patents

Description

R. H. MUELLER.

Pl-PE END REAMER. APPLICATION r1150 DEC. 12. 1918.

Patented Mar. 21, 1922.

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R. H. MUELLER.

PIPE END REAMER. APPLICATION FILED DEC. 12, 1am.

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UNITED STATES PATENT OFFICE.

ROBERT MUELLER, OF DECATUR, ILLINGIS, ASSIGNOR TO ADOLPH MUELLER, TRUSTEE, OF DECATUR, ILLINOIS.

PIPE-END REAMER.

Patented Mai-.21, 1922.

Application filed December 12, 1918. Serial No. 266,432.

To all whom it may concern:

Be it known that 1, Ronmrr ll. MUELLER, a citizen of the United States, residing at Decatur, in the county of Macon and State of Illinois, have invented new and useful Improvements in Pipe-End Reainers, of which the following is a specification.

This invention relates to boring devices, and particularly to reamers of a type for boring out the ends of pipes and the like.

It is the purpose of the present invention to provide a reamer, the blades of which may be easily and quickly inserted and removed for purposes of renewal and repair, and which blades, after they are in position, are securely held in place. A reamer constructed in accordance with the present invention consists of a relatively few number of parts, each of which parts is simple in construction and the parts may be readily assembled and disassembled, so that the reamers can be cheaply manufactured and placed upon the market at a relatively low cost.

It is a further object of my invention to provide a. reamer, each of the parts of which, and particularly the body portion on which great strain is exerted, is extremely strong, so that the reamer is very durable and eflicient in service.

The above and other objects of my invention are obtained in the structure desc *ibed in the following specification and illustrated in the accompanying drawings, and wherein:

Fig. 1 as a longitudinal sectional view through one embodiment of my improved re-amer.

Fig. 2 is an elevational view of the reamer shown in Fig. 1, with the forward portion thereof cut away on line 2-2 ofFig. 1.

Fig. 3 is a top plan view of the body portion or stock of my improved reamer.

Fig. t is a transverse sectional view through the stock of the reamer shown in Fig. 1 and taken substantially on line 1- 1 of said figure.

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

Fig. 6 is similar to Fig. 1, but illustrates another embodiment of my invention.

Fig. 7 is a fragmentary view, showing in section a slightly different construction from that illustrated in Fig. 6.

Referring to said drawings, wherein like numerals represent like parts in the several views, 10 designates the stock or body portion of the improved reamer, which in the preferred form or embodiment, as shown in Figures 1 to 41;, is by preference in one piece. This body portion is preferably a casting of malleable iron, so that it is eX- tremely strong, and breakage under the roughest usage is insured against. The body portion 10 has a head 11, which is an nular and stepped, and from which extends a spindle portion 12, terminating in an enlargement 13, which tapers towards a point at its extremity. The spindle portion 12 has a plurality of integral ribs 14c, which serve to reinforce the stocklO, without materially increasing the weight thereof. The stepped head 11 in Figure 1 is integral with the remaining. portion of the StOC-K, and it has a circular flange 15', provided at its edge with equally spaced notches 16, adapted to receive the upper ends of the reamer blades 17. The inner edges of the notches 16 are at an angle to thelongitudinal axis of the bodyport-ion-10: The upper step 18 of the head 11 is of less diameter than the lower step or fiange 15, so as to provide an annular recess above the flange 15 for the reception of theupper extremities of the reamer blades 1?. The circumferential edge of the step 18 is designated in the drawings by numeral 19. The conical enlargement 13 is provided with a plurality of lon itudinally extending slots 20, which are spaced angula-rly in a manner similar to the notches 16, so as to receive the lower ends of the reamer blades 17.

Each of the reamer blades 17, which is rectangular in cross-section and constructed of s eel as is usual, is bevelled as at 21, so that the inner edge-of the same will engage the inner wallof one of thegrooves andslots 20. Adjacent the upper end of each of the blades isa notch 22, which is co-extensive in length to the thickness of the flange 15, so as to snugly receive the same. The notch 22- of each bladeprovides at the upper extremity of the blade a lug 23, which is located within the annular groove of the head, and the inner edge of which is adapted to snugly engage against the circumferential edge 19 of the stepped portion 18. It will be seen that the inner walls of the notches 22 are inclined similarly to the opposed faces ofthe notches 16 and this is of advantage from a practical standpoint as close engagement is obtained between the edges of the blades and the opposed surfaces of the head 11. Furthermore, when the reamer is in use, pres sure is exerted on the blades which tends to cause the blades to move upwardly towards the handle of the reamer, and by providing the abutting inclined surfaces in the notches l6 and 22 this direction of movement of the rcamer blades is resisted.

Extending from the head in a direction opposite to, but in axial alignment with the spindle 12, is a stem having a circular portion 25 a polygonal or square portion 25 and a circular spindle portion 26, of less diameter than the squared portion 25. The stem of the stock is adapted to receive the ratchet handle 27, which comprises in the present instance, a tubularportion 28, terminating at one end in a 29, between which is received a ratchet wheel 30. Vithin the bore of the tubular portion 28 is a plunger 31, having on its inner end a pawl adapted to engage the teeth of the ratchet wheel 39. The plunger 31 is resiliently urged towards the ratchet wheel by means of a coiled spring 33, which is retained in place, and the tension of which is regulated by a plug 34 threaded into the tubular portion 28.. The outer end of the bore of the tubular portion 28 is threaded, soas to receive the threaded end of an extension handle 35. V i

The opening in the lower lug. 29 of the ratchet handle is of such diameter as to snugly receive the circular portion 24% of the like portion 39 of the brace knob is a stem of the body portion of the reamer, while the opening of the upper lug 29 is of such diameter as to snugly receive the spindle portion 26. It is of course understood that the opening through the ratchet wheel 30 is of like cross-section as the squared portion 25, so as to receive the latte Located between the stepped portion 18 and the ratchet handle is a cap 86,having an opening for the reception of the circular portion 24, and also having a flange or skirt 37 which fits closely about the flange 15 and locks the upper ends of the reamer blades 17 in place. The metal cap 36' prevents outward displacement of the blades 17.

The numeral 38 designates a brace-knob, the stem portion of which is recessed so as to receive the outer end of the spindle portion 26 of the stock. The lower end of the stem or sleeve-like portion 39 of the brace knob, rests within an angular recess 40 located in the outer surface of the ear 29 and about the through opening therein. Adjacent the outer end of the spindle portion26 is a circumferential grooveetl. In the sleeve radial opening through which a pin 42 is adapted to extend, and this pin at its inner end engages in the groove 41. The opening through which the pin 42 extends is located Within a circumferential groove 42 in the pair of spaced apertured ears sleeve-like this groove is adapted to receive a spring clamp 4-3 which prevents the pin 4-2 from be coming displaced, this structure being most clearly shown in Fig. 5. 7

In the embodiment of the invention disclosed in Fig. 6, I have shown the head 11 as being separate from the stock 10. In this case the head 11 comprises a circular disc having a central aperture adapted to receive a circular portion lt of the stockand the head. rests upon a shoulder 45 integral with the stock 10. is not stepped, and the blades l7 are deviod oi. the notches 22. The upper ends of the blades 17 engage within notches 16 in the head ll and are maintained against displacement by a cap 36 For the purpose of retaining the lower ends of the blade 17 against displacement from the slots 19 of the enlargement 13 a screw 46 is provided, this screw being adapted to be screwed into a threaded recess in the extremity of the enlargcment l3, and having its inner face recessed, as at 4.7, so as to receive the lower ends of the blades 17. V

In Fig. 7,the head 11 is separate from the stock 10, as in the embodiment shown in Fig. 6, but in this instance the head 11 is stopped and the blade 17 has a lug 23 similarly to corresponding parts shown in the embodiment of Fig. l.

The manner of assembling the parts of my improved reamer will be readily understood. Referring to Fig. l, the blades 17 are first placed with their lower ends in the slots 20 and their upper end in the notches 16. The cap 36 is then placed over the stem and brought into position where it encircles the head 15. ed in place with the lower lug 29 encircling the circular portion 241-, and the outer lug 29 encircling the spindle portion 26. It will be seen from the drawings that the lower face of the upper lug 29 of the ratchet handle rests upon the squared portion 25 so as to prevent the handle .f1'0111 coming into too close engagement with the cap 36." The brace knob 38 is next placed over the spindle 26;

the pin 42 is inserted in the opening in the sleeve-like portion 39; and then the spring clamp 43 is placed within the groove 42 provided therefor, so as to prevent the pin 42 from "falling out of place. 1 i

It will be seen from the above description that in a reanier constructed in accordance with this invention, the cap 86, the ratchet handle 27 and the brace knob 38 are all securely locked in place by a common locking means, namely the pin 42, and, therefore, the

parts may be readily and quickly assembled. 7

Each part of the reamer is relatively simple in structure, and the blades are securely held in place.

It is of course obvious that my invention portion39 of the brace-knob, and

In this instance, the head 11 The ratchet handle is then insertis susceptible of various modifications and changes which are Withinthe spirit of the invention without departing from the scope of the following claims.

\Vhat I claim is:

1. In a reamer, the combination of a body portion having blade seats formed at its edge, a spindle portion extending from said body portion and having blade-receiving seats formed therein, reamer blades loosely engaged at their upper ends with said body blade seats and at their lower ends with said spindle blade seats, and vertically shit'table means for holding said blades in the seats.

2. In a reamer, the combination ota body portion having notches with shouldered bottoms formed in its edge to provide blade seats, a spindle portion extending from said body portion and having blade receiving seats formed therein, reamer blades notched at their upper ends to engage the shouldered bottoms of said blade seats so as to lock them against longitudinal movement but permit lateral removal and engaging at their lower ends with said spindle seats, and an annular slip ring to hold the upper ends of said blades against lateral displacement. 7

3. In a reamer, the combination of a body portion having blade seats formed in its edge, a spindle portion extending from said body portion and having blade receiving seats formed therein, reamer blades having their ends loosely mounted in said seats and laterally removable therefrom, and a ver tically shiftable ring on the'body portion to hold said blades against lateral displacement. I

a. In a reamer, the combination of a body portion having blade seats formed in its edge, a spindle portion extending from said body portion and having blade receiving seats formed therein, reamer blades loosely mounted in said seats and laterally removable therefrom, a slip ring to engage the upper ends of said blades and hold them against lateral displacement, and detachable member at the end of said spindle to engage the lower ends of said blades and hold them against lateral displacement.

5. In a reamer, the combination of a stepped body portion having notches in its edge to form bladereceiving seats, a blade receiving spindle extending from said body portion, reamer blades having notches at their upper ends to engage the seats in said stepped portion so as to hold said blades against longitudinal movement but laterally removable from said seats and loosely engaged at their lower ends with said spindle seats, and means for holding said blades against lateral displacement.

6. In a reamer, the combination of a body portion having blade seats formed in its periphery, a spindle extending from said body portion, and having blade receiving seats formed therein, reamer blades loosely mounted at their opposite ends in said body and spindle seats, a vertically moveable blade holding ring to engage the upper ends of said blades and hold them against lateral movement, and a removable cupped screw at the lower end of said blade receiving spindle to engage and hold the lower ends of said blades against lateral displacement.

7 In a reamer, the combination of a spindle having an enlarged portion provided with blade receiving seats, a body portion on said spindle having blade receiving seats formed in its edge, reamer blades having their upper ends engaged with said body seats and their lower ends engaged with said spindle seats, means carried by said brace spindle to engage the upper ends of said blades and hold them in their seats, and means at the lower end of said blade holding spindle to engage over the lower ends of said blades and hold them in their seats.

8. In a reamer, the combination of a spindle having an enlarged portion provided with blade receiving seats, a body portion removably mounted on said spindle and having blade receiving seats formed in its edge, reamer blades having their upper ends engaged with said body seats and their lower ends engaged with said spindle seats, means carried by said brace spindle to engage the upper ends of said blades and hold them in their seats, and means at the lower end of said blade holding spindle to engage over the lower ends of said blades and hold them in their seats.

In testimony whereof I havefl' ereunto set my hand.

' ROBERT H. MUELLER.

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