Patent US3838428A successfully refreshed from Google Patents.
US3838428A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soil impedance log
Assignee: Individual
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Filing: 1973-10-01
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Granted: 1974-09-24
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Expires: 1993-10-01
Abstract
Abstract A soil impedance log operatively connected to a track drill, including a transducer for sensing the number of hammer blows upon the drill rod, an electrical system for processing, accumulating and periodically counting the hammer signals for each successive uniform depth of penetration, and recording means operatively connected to the track drill for visually indicating the comparison of the number of hammer blows per unit depth of penetration with the total depth of penetration.
Inventors
- 👤 R Benson
- 👤 R Reed
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:05
CPC Classifications
E; E02; E02D; E02D1/00; E02D1/02; E02D1/022; G; G01; G01N; G01N3/00; G01N3/32; G01V; G01V9/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
143 words
In combination with a track drill having a drill rod and a hammer assembly for periodically imparting blows to the drill rod to drive the drill rod into soil, a soil impedance log comprising: a. means operatively connected to said track drill to record the depth of penetration of sAid drill rod into said soil, b. a transducer on said track drill for sensing each blow imparted by said hammer assembly to said drill rod and for producing a corresponding electrical input signal, c. electrical means for counting the electrical input signals for each predetermined unit of drill rod penetration to produce a corresponding output signal for each said unit, d. means responsive to said output signals and cooperating with said recording means to represent the number of blows per unit of penetration at each corresponding depth of penetration of said drill rod.
Claim 2
Dependent Claim
143 words
In combination with a track drill having a drill rod and a hammer assembly for periodically imparting blows to the drill rod to drive the drill rod into soil, a soil impedance log comprising: a. means operatively connected to said track drill to record the depth of penetration of sAid drill rod into said soil, b. a transducer on said track drill for sensing each blow imparted by said hammer assembly to said drill rod and for producing a corresponding electrical input signal, c. electrical means for counting the electrical input signals for each predetermined unit of drill rod penetration to produce a corresponding output signal for each said unit, d. means responsive to said output signals and cooperating with said recording means to represent the number of blows per unit of penetration at each corresponding depth of penetration of said drill rod.
Claim 3
Dependent Claim
65 words
The invention according to claim 1 in which said electrical counting means comprises means for storing said electrical input signals, said stored signals having a voltage magnitude proportional to the number of input signals, electrical trigger means operatively connected to said track drill for converting said stored signals, at the end of each of said units of penetration, to produce each of said output signals.
Claim 4
Dependent Claim
28 words
The invention according to claim 2 in which said electrical counting means further comprises means for converting said input signals into current pulses of equal magnitude for storage.
Claim 5
Dependent Claim
46 words
The invention according to claim 2 in which said trigger means comprises a rotary commutator switch operatively connected to said drill rod for proportional movement with said drill rod, said commutator switch having at least two uniformly spaced electrical contacts corresponding to said unit of penetration.
Claim 6
Dependent Claim
50 words
The invention according to claim 2 in which said recording means comprises means for visually indicating said depth of penetration, and said cooperating means comprises means for visually representing the number of blows per unit of penetration simultaneously with the visual indication of said depth of penetration for visual comparison.
Claim 7
Dependent Claim
77 words
The invention according to claim 5 in which said recording means further comprises a scribing surface, means for moving said scribing surface in one longitudinal direction a distance proportional to the depth of penetration of said drill rod, a scribing instrument for indicating said depth of penetration on said scribing surface, said cooperating means comprising means for driving said scribing instrument transversely of said scribing surface a distance proportional to the voltage magnitude of each output signal.
Claim 8
Dependent Claim
41 words
The invention according to claim 6 in which said recording means further comprises a unidirectional drive means coupling said drill rod to said means for moving said scribing surface, so that said scribing surface moves only in said one longitudinal direction.
Claim 9
Dependent Claim
28 words
The invention according to claim 6 further comprising means for disengaging said scribing instrument from said scribing surface while said drill rod is retracted from its penetrating position.
Claim 10
Dependent Claim
58 words
The invention according to claim 2 in which said electrical counting means further comprises electrical integrator means, means for transmitting said stored signals to said integrator means, said integrator means integrating said stored signals to produce each output signal having a voltage magnitude proportional to the number of blows per unit of penetration, for actuating said cooperating means.
Claim 11
Dependent Claim
25 words
The invention according to claim 1 in which said transducer is mounted on said drill track for sensing the vibrations of each of said blows.
References Cited (Backward Citations)
US3504370A
Cited
US3498388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |