US3554308A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rock drill rod
Assignee: Ingersoll Rand Co
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Filing: 1968-12-12
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Granted: 1971-01-12
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Expires: 1988-12-12
Abstract
Abstract A rock drill rod which has a reduced diameter portion at either or both ends. The main portion of the rod is of constant diameter and threaded throughout its length. The reduced diameter portion is threaded substantially throughout its length. A drill bit is secured to the reduced diameter end and is dimensioned to drill a hole slightly larger than the diameter of the drill rod.
Inventors
- 👤 J D Ditson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:40
CPC Classifications
E; E21; E21B; E21B17/00; E21B17/22
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
82 words
A drill rod comprising an elongated body having a first diameter portion and a second, reduced diameter portion at least one end thereof and a bore axially therethrough; said first diameter having an attachment thread extending substantially the entire length thereof; and said second, reduced diameter portion having an attachment thread extending from the end of the drill rod toward the intersection of the first and second portions for a distance sufficient to permit a drill bit to be threadedly secured thereto.
Claim 2
Dependent Claim
82 words
A drill rod comprising an elongated body having a first diameter portion and a second, reduced diameter portion at least one end thereof and a bore axially therethrough; said first diameter having an attachment thread extending substantially the entire length thereof; and said second, reduced diameter portion having an attachment thread extending from the end of the drill rod toward the intersection of the first and second portions for a distance sufficient to permit a drill bit to be threadedly secured thereto.
Claim 3
Dependent Claim
20 words
The drill rod of claim 1 wherein there is a reduced diameter portion at each end of the drill rod.
Claim 4
Dependent Claim
19 words
The drill rod of claim 1 wherein said bore is reduced in diameter at said second, reduced diameter portion.
Claim 5
Dependent Claim
116 words
A drill rod comprising an elongated body having a first diameter portion and a second, reduced diameter portion at least one end thereof and a bore axially therethrough; said first diameter having portion attachment thread extending substantially the entire length thereof; said second, reduced diameter portion having an attachment thread extending from the end of the drill rod toward the intersection of the first and second portions for a distance sufficient to permit a drill bit to be threadedly secured thereto; and wherein the lead of the thread on said first portion is substantially the same as the lead of the thread on said second portion and at least one of said threads is roll formed.
Claim 6
Dependent Claim
116 words
A drill rod comprising an elongated body having a first diameter portion and a second, reduced diameter portion at least one end thereof and a bore axially therethrough; said first diameter having portion attachment thread extending substantially the entire length thereof; said second, reduced diameter portion having an attachment thread extending from the end of the drill rod toward the intersection of the first and second portions for a distance sufficient to permit a drill bit to be threadedly secured thereto; and wherein the lead of the thread on said first portion is substantially the same as the lead of the thread on said second portion and at least one of said threads is roll formed.
Claim 7
Dependent Claim
38 words
The drill rod of claim 4 wherein said second portion is threaded substantially completely to the intersection of said first and second portions and said second portion is no longer than one-tenth the length of the drill rod.
Claim 8
Dependent Claim
94 words
A rock drill rod and drill bit system comprising: a drill rod having a first portion and a second, reduced diameter portion at one end thereof; said first portion having an attachment thread which extends circumferentially around the first portion throughout its length; said second, reduced diameter portion having an attachment thread which extends circumferentially around the second portion substantially completely throughout its length; and a drill bit secured to the second portion of the drill rod and dimensioned to bore a hole having a diameter larger than the diameter of said first portion.
Claim 9
Dependent Claim
94 words
A rock drill rod and drill bit system comprising: a drill rod having a first portion and a second, reduced diameter portion at one end thereof; said first portion having an attachment thread which extends circumferentially around the first portion throughout its length; said second, reduced diameter portion having an attachment thread which extends circumferentially around the second portion substantially completely throughout its length; and a drill bit secured to the second portion of the drill rod and dimensioned to bore a hole having a diameter larger than the diameter of said first portion.
Claim 10
Dependent Claim
32 words
The drill rod and drill bit system of claim 6 wherein said drill bit is dimensioned to bore a hole at least one-eighth inch larger than the diameter of said first portion.
Claim 11
Dependent Claim
32 words
The drill rod and drill bit system of claim 6 wherein said drill rod is provided with a bore axially therethrough and said bore is reduced in diameter at said second portion.
Claim 12
Dependent Claim
38 words
The drill rod and drill bit system of claim 8 wherein said second portion is threaded for a distance which is at least twice as long as the length of thread needed to secure said drill bit thereto.
Claim 13
Dependent Claim
117 words
A rock drill rod and drill bit system comprising: a drill rod having a first portion and a second, reduced diameter portion at one end thereof; said first portion having an attachment thread which extends circumferentially around the first portion throughout its length; said second, reduced diameter portion having an attachment thread which extends circumferentially around the second portion substantially completely throughout its length; a drill bit secured to the second portion of the drill rod and dimensioned to bore a hole having a diameter larger than the diameter of said first portion; and wherein the lead of the thread on said first portion is the same as the lead of the thread on said second portion.
Claim 14
Dependent Claim
117 words
A rock drill rod and drill bit system comprising: a drill rod having a first portion and a second, reduced diameter portion at one end thereof; said first portion having an attachment thread which extends circumferentially around the first portion throughout its length; said second, reduced diameter portion having an attachment thread which extends circumferentially around the second portion substantially completely throughout its length; a drill bit secured to the second portion of the drill rod and dimensioned to bore a hole having a diameter larger than the diameter of said first portion; and wherein the lead of the thread on said first portion is the same as the lead of the thread on said second portion.
Claim 15
Dependent Claim
18 words
The drill rod and drill bit system Of claim 10 wherein both of said threads are roll formed.
Claim 16
Dependent Claim
148 words
A rock drill rod and drill bit system comprising: a drill rod having a first portion and a second, reduced diameter portion at one end thereof; said first portion having an attachment thread which extends circumferentially around the first portion throughout its length; said second, reduced diameter portion having an attachment thread which extends circumferentially around the second portion substantially completely throughout its length; a drill bit secured to the second portion of the drill rod and dimensioned to bore a hole having a diameter larger than the diameter of said first portion; wherein said drill bit is dimensioned to bore a hole at least one-eight larger than the diameter of said first portion; and wherein the lead of the thread on said first portion is the same as the lead of the thread on said second portion and at least one of said threads is roll formed.
Claim 17
Dependent Claim
148 words
A rock drill rod and drill bit system comprising: a drill rod having a first portion and a second, reduced diameter portion at one end thereof; said first portion having an attachment thread which extends circumferentially around the first portion throughout its length; said second, reduced diameter portion having an attachment thread which extends circumferentially around the second portion substantially completely throughout its length; a drill bit secured to the second portion of the drill rod and dimensioned to bore a hole having a diameter larger than the diameter of said first portion; wherein said drill bit is dimensioned to bore a hole at least one-eight larger than the diameter of said first portion; and wherein the lead of the thread on said first portion is the same as the lead of the thread on said second portion and at least one of said threads is roll formed.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |