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US3905718A Expired / Lapsed US ⏱️ 0.0 years remaining

Driving tool

Assignee: Mueller Co
•
Filing: 1974-10-31
•
Granted: 1975-09-16
•
Expires: 1994-10-31
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Abstract

Abstract A cutter member for use in cutting a hole in plastic pipe having a thick wall or a thin wall. The cutter member is rotated and advanced with a positive predetermined lead against the pipe, the cutter member being so designed that after it has cut the initial chips off the outside curvature of the pipe, it cuts a continuous chip by a peeling action and the initial chips and continuous chip are discharged inwardly of the cutter member above the coupon being cut. The cutter member may be repeatedly used and it can be used with a drilling tool or machine or, for that matter, a tapping tee. The preferable drilling machine for use with the cutter machine is of simple construction, including a tubular body member, a two-piece boring bar with one member having threads thereon for positively advancing the cutter member, and the other member of the boring bar being adapted to receive the cutter member. The drilling tool is detachably attached to a pipe or to a fitting operatively connected to the pipe, the fitting having the usual passageway therethrough and the boring bar being arranged to extend through the passageway to the wall of the pipe to be cut. The drilling tool is provided with means where the boring bar can be rapidly advanced to the cutting position or rapidly retracted after cutting and, further, the drilling tool is designed to prevent blow out of the boring bar when cutting pipes under pressure.

Inventors

  • 👤 Lawrence F Luckenbill
  • 👤 Daniel A Ellis

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 01:29
CPC Classifications
B; B23; B23B; B23B51/00; B23B51/04; B23B51/0426; B23B51/044; F; F16; F16L; F16L47/00; F16L47/26; F16L47/34; B23B2215/00; B23B2215/72; B23B2226/00; B23B2226/61; Y; Y10; Y10T; Y10T137/00; Y10T137/598; Y10T137/612; Y10T137/6123; Y10T408/00; Y10T408/55; Y10T408/564; Y10T408/5647; Y10T408/68

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 242 words
A drilling tool for drilling a hole in a pipe, the drilling tool being adapted to be connected to a fitting having a passageway therethrough and fixedly attached to the pipe, said drilling tool comprising; an elongated tubular body member having one end attached to the fitting in alignment to the passage therethrough, a two-piece boring bar extending completely through said tubular body member, said two-piece boring bar including a first elongated member of predetermined diameter and a second elongated member exteriorly threaded and detachably connected to said first member, said second member being of less diameter than said first member, said tubular body member having a first bore at its end opposite to the end attached to the fitting and through which said second elongated member extends, said first bore being of a reduced diameter less than the diameter of said first elongated member to prevent the boring bar from being blown out of the same, a disengagement nut member detachably received on the end of said tubular body member having said first bore, said disengagement nut member having a threaded bore therethrough for receiving the threaded second member whereby said boring bar can be rotatively advanced and retracted, said boring bar being capable of rapid positioning when said disengagement nut is detached from said body member, and a cutter member operatively connected to said first elongated member at its ends opposite to its detachable connection to said second elongated member.
Claim 2
Dependent Claim 242 words
A drilling tool for drilling a hole in a pipe, the drilling tool being adapted to be connected to a fitting having a passageway therethrough and fixedly attached to the pipe, said drilling tool comprising; an elongated tubular body member having one end attached to the fitting in alignment to the passage therethrough, a two-piece boring bar extending completely through said tubular body member, said two-piece boring bar including a first elongated member of predetermined diameter and a second elongated member exteriorly threaded and detachably connected to said first member, said second member being of less diameter than said first member, said tubular body member having a first bore at its end opposite to the end attached to the fitting and through which said second elongated member extends, said first bore being of a reduced diameter less than the diameter of said first elongated member to prevent the boring bar from being blown out of the same, a disengagement nut member detachably received on the end of said tubular body member having said first bore, said disengagement nut member having a threaded bore therethrough for receiving the threaded second member whereby said boring bar can be rotatively advanced and retracted, said boring bar being capable of rapid positioning when said disengagement nut is detached from said body member, and a cutter member operatively connected to said first elongated member at its ends opposite to its detachable connection to said second elongated member.
Claim 3
Dependent Claim 63 words
A drilling tool as claimed in claim 1 in which said tubular body member is provided with a second bore adjacent its end attached to said fitting, said second bore having a diameter to slidably and/or rotatively receive said first elongated member and through which said first elongated member extends, and including sealing means between said first elongated member and said second bore.
Claim 4
Dependent Claim 27 words
A drilling tool as claimed in claim 2 in which said sealing means include a groove in said second bore and an O ring in said groove.
Claim 5
Dependent Claim 35 words
A drilling tool as claimed in claim 3 including sealing means between said disengagement nut member, tubular body member, and said second elongated member whereby said tubular body member may be filled with a lubricant.
Claim 6
Dependent Claim 17 words
A drilling tool as claimed in claim 4 in which said sealing means is a wiper gasket.
Claim 7
Dependent Claim 22 words
A drilling tool as claimed in claim 1 in which said disengagement nut member is threadedly received on said tubular body member.
Claim 8
Dependent Claim 32 words
A drilling tool as claimed in claim 1 in which said first elongated member and said second elongated member of said boring bar are detachably connected by means of a roll pin.

References Cited (Backward Citations)

US2899983A Cited
US1065248A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-09-15 1979-03-17 1979-09-16 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-09-15 1983-03-17 1983-09-16 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-09-15 1987-03-17 1987-09-16 $7700.00 Window Closed / Lapsed

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