US3554306A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polygonal drill rod assembly
Assignee: ILLINOIS WATER TREATMENT COMPANY A DE CORP
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Filing: 1968-11-29
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Granted: 1971-01-12
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Expires: 1988-11-29
Abstract
Abstract A vacuum drill rod system of tubular members having polygonal inner and outer cross sections which interact with comparable outer and inner cross sections of cooperating elements when the rod system is connected to achieve concurrent rotation of the elements of the system.
Inventors
- 👤 Willard R Wilburn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:47
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/36; E21B10/38; E21B17/00; E21B17/02; E21B17/04; E21B17/046; E21B17/0465; F; F16; F16D; F16D1/00; F16D1/10; F16D1/101; F16D2001/102
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
198 words
Apparatus for vacuum drilling hard minerals in situ such as rock, coal and the like, comprising: rotary power means including a vacuum generating means; a drill chuck adapted for concurrent rotation and transmission of torque from said rotary power means, said chuck having an axial bore therethrough defining a polygonal cross section; at least one hollow elongated drill rod having longitudinal outer surfaces defining a polygonal cross section and an axial bore with axial wall surfaces defining a polygonal opening, said longitudinal outer surfaces and said axial wall surfaces being in parallel planar relation, said drill rod adapted to be closely engaged at one end thereof by said drill chuck within said chuck''s polygonal bore, said drill rod''s axial bore being in communication with said vacuum generating means; a drill bit having a polygonal shank adapted to be closely engaged by said drill rod so as to produce concurrent rotation and transmission of torque of said drill bit by said rotary power means, said drill rod and drill bit having port means therein communicating with said rod and bit''s environment to enable said vacuum means to draw the fluid environment around said bit and leavings of drilling therethrough.
Claim 2
Dependent Claim
198 words
Apparatus for vacuum drilling hard minerals in situ such as rock, coal and the like, comprising: rotary power means including a vacuum generating means; a drill chuck adapted for concurrent rotation and transmission of torque from said rotary power means, said chuck having an axial bore therethrough defining a polygonal cross section; at least one hollow elongated drill rod having longitudinal outer surfaces defining a polygonal cross section and an axial bore with axial wall surfaces defining a polygonal opening, said longitudinal outer surfaces and said axial wall surfaces being in parallel planar relation, said drill rod adapted to be closely engaged at one end thereof by said drill chuck within said chuck''s polygonal bore, said drill rod''s axial bore being in communication with said vacuum generating means; a drill bit having a polygonal shank adapted to be closely engaged by said drill rod so as to produce concurrent rotation and transmission of torque of said drill bit by said rotary power means, said drill rod and drill bit having port means therein communicating with said rod and bit''s environment to enable said vacuum means to draw the fluid environment around said bit and leavings of drilling therethrough.
Claim 3
Dependent Claim
94 words
Apparatus of claim 1 including a plurality of said drill rods connected in longitudinal relationship for concurrent rotation and transmission of torque from said rotary power means to said drill bit wherein said rods are connected by an intermediate hollow connecting member having a cooperating polygonal configuration on either end adapted to closely engage said drill rods in a connecting relationship, said connecting member having gauging means to limit the engagement of said connecting member with said drill rods in the connecting relationship to an extent less than one-half the length of said rod.
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 |