Patent US3613807A successfully refreshed from Google Patents.
US3613807A
Expired / Lapsed
US
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Drill rod with dust-collecting means
Assignee: Individual
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Filing: 1969-08-14
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Granted: 1971-10-19
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Expires: 1989-08-14
Abstract
Abstract A drill rod for use in rotary percussion drilling includes an elongated inner solid core member and an outer tubular member positioned coaxially around the inner core member. The outer tubular member is spaced from the core member to provide a passageway therebetween for the flow of dust and drill cuttings therethrough. The outer tubular member has a plurality of longitudinal ports adjacent the bit through which the dust and cuttings enter the passageway. The bit is supported by the inner core member in a recessed axial bit-shank-receiving portion and the percussive and torsional forces are transmitted to the drill bit through the inner core member.
Inventors
- 👤 Alex J Galis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:57
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/36
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
150 words
A drill rod for a rotary percussive drill comprising, an elongated inner core member having a drill-bit-receiving end portion and sidewalls, an elongated outer tubular member having an axial opening therethrough with an inner wall, an outer wall and an annular end portion, said inner core member positioned coaxially within said outer tubular member in spaced relation thereto to provide a passageway between said inner core member sidewalls and said outer tubular member inner wall, said outer tubular member having elongated longitudinally extending ports therethrough adjacent said annular end portion and forming inlet means to said passageway adjacent said core member drill-bit-receiving end portion for the entry of dust and cuttings created by a drill bit during the drilling operation, and said inner core member having sufficient rigidity to transmit both rotational and percussive forces to a drill bit adapted to be secured in said core member drill-bit-receiving end portion.
Claim 2
Dependent Claim
150 words
A drill rod for a rotary percussive drill comprising, an elongated inner core member having a drill-bit-receiving end portion and sidewalls, an elongated outer tubular member having an axial opening therethrough with an inner wall, an outer wall and an annular end portion, said inner core member positioned coaxially within said outer tubular member in spaced relation thereto to provide a passageway between said inner core member sidewalls and said outer tubular member inner wall, said outer tubular member having elongated longitudinally extending ports therethrough adjacent said annular end portion and forming inlet means to said passageway adjacent said core member drill-bit-receiving end portion for the entry of dust and cuttings created by a drill bit during the drilling operation, and said inner core member having sufficient rigidity to transmit both rotational and percussive forces to a drill bit adapted to be secured in said core member drill-bit-receiving end portion.
Claim 3
Dependent Claim
59 words
A drill rod as set forth in claim 1 in which, said inner core member has a generally solid rectangular configuration in section, and said outer tubular member has a generally cylindrical shape in section and is formed relatively thin-walled tubing sufficient to maintain the cylindrical configuration when a suction is imparted to said passageway during the drilling operation.
Claim 4
Dependent Claim
40 words
A drill rod as set forth in claim 1 in which, said outer tubular member annular end portion is spaced from the head portion of a drill bit providing an annular opening that forms another inlet means to said passageway.
Claim 5
Dependent Claim
55 words
A drill rod as set forth in claim 1 in which, said inner core member has an axial bit-receiving recess in said bit-receiving end portion operable to receive and secure the shank portion of a drill bit therein so that both rotation and percussion are transmitted through said inner core member to the drill bit.
Claim 6
Dependent Claim
50 words
A drill rod as set forth in claim 1 in which, said inner core member has a generally solid cylindrical configuration, said outer tubular member has a generally cylindrical configuration, and means secured to said outer tubular member and abutting said inner core member to maintain an annular passageway therebetween.
Claim 7
Dependent Claim
24 words
A drill rod as set forth in claim 1 in which, said inner core member is metal and said outer tubular member is plastic.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-18 | 1975-04-19 | 1975-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-18 | 1979-04-19 | 1979-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-18 | 1983-04-19 | 1983-10-19 | $7700.00 | Window Closed / Lapsed |