US4441564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable variable angle drilling machine
Assignee: Individual
•
Filing: 1981-07-27
•
Granted: 1984-04-10
•
Expires: 2001-07-27
Abstract
Abstract A hole drilling machine which includes a geared stationary drill frame with a guide track to which support legs are attached at either end. A drive shaft made of hollow flexible tubing driven by a motor suspended from the guide track. An adjustable swivel axel to which the drill end is mounted. The drill end is a hollow tube with openings in an end to permit streams of water to wash loose soil out of the hole and assist in the drilling process and a helical knife edge attached thereto. An angled metal piece with exit holes to permit the flow of water is attached to the working end.
Inventors
- 👤 Michael S. Castillo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:40
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
164 words
A soft material drilling machine for use in drilling holes under a hard surface comprising in combination a geared support shaft; two sets of triangular legs; one set moveably attached to the end opposite the hole drilling end; a motor mounted to a geared rack attached to a support shaft; a means to engage the geared rack to the support shaft; and, the invention which consists of a long hollow, flexible plastic drive shaft means connected on one end to a motor and the other end to a hollow drill means; a water jacket around the end closest to the motor with the water inlet; a collar swivel axle assembly to contain the drill shaft; a dual roller, one roller attached to each side of an inverted U-shaped collar-swivel axel assembly, and a handle frictionally mounted to the swivel axle and capable of moving the plastic drive shaft in two directions; and, holes on the front end of the drill to exit the water.
Claim 2
Dependent Claim
164 words
A soft material drilling machine for use in drilling holes under a hard surface comprising in combination a geared support shaft; two sets of triangular legs; one set moveably attached to the end opposite the hole drilling end; a motor mounted to a geared rack attached to a support shaft; a means to engage the geared rack to the support shaft; and, the invention which consists of a long hollow, flexible plastic drive shaft means connected on one end to a motor and the other end to a hollow drill means; a water jacket around the end closest to the motor with the water inlet; a collar swivel axle assembly to contain the drill shaft; a dual roller, one roller attached to each side of an inverted U-shaped collar-swivel axel assembly, and a handle frictionally mounted to the swivel axle and capable of moving the plastic drive shaft in two directions; and, holes on the front end of the drill to exit the water.
Claim 3
Dependent Claim
84 words
A drill shaft means as in claim 1 which comprises in combination; a hollow tube with a knife edge wound helically around, at most, three-fourths of it; attached thereto and contained therein an inverted U-shaped collar in which the last one-fourth of the tube fits and to which two rollers attached by a U-shaped collar-swivel axel assembly with a handle frictionally attached to one of two rollers in the collar swivel axle assembly capable of swiveling the hollow tube in two directions--up and down.
Claim 4
Dependent Claim
34 words
A drill means as in claim 1 in which: an angled metal end piece with water exit holes therein attached to the end of the hollow tube opposite the end inserted in the collar.
References Cited (Backward Citations)
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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) | 1987-04-10 | 1987-10-10 | 1988-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-10 | 1991-10-10 | 1992-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-10 | 1995-10-10 | 1996-04-10 | $7700.00 | Window Closed / Lapsed |