US3554303A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Earth piercing apparatus and method
Assignee: Individual
•
Filing: 1968-08-02
•
Granted: 1971-01-12
•
Expires: 1988-08-02
Abstract
Abstract An earth-piercing apparatus and method wherein an impactor driven nonrotary implement is provided, the implement comprising a series of rigid selectively coupled elongated sections. Cutting collars of successively larger in size are provided between adjacent sections so that the implement, when driven through the ground by the impactor, displaces successively larger volumes of earth to form a finished bore.
Inventors
- 👤 William Zajkowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:39
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/96; E02F3/963; E21; E21B; E21B7/00; E21B7/04; E21B7/046; E21B7/28
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
24 words
A method in accordance with claim 1, wherein the driving steps are performed by pushing the elongated members and applying an intermittent impact thereto.
Claim 2
Dependent Claim
128 words
In earth-piercing apparatus comprising an earth-piercing implement and means for driving the implement through the earth to form a generally horizontally disposed bore, said implement comprising a rigid elongated member having a tip thereon for penetrating the earth and comprising a plurality of sections coupled in end-to-end relation, spaced concentric cutting collar members of successively increasing diameter and having peripheral cutting edges thereon coupled to said elongated member between adjacent sections of said elongated member, the smallest of said cutting members being disposed closest to said tip, whereby said cutting collar members cut successively larger bores as said implement is driven through the earth, the last of said cutting collar members providing a finished bore having a diameter corresponding to the diameter of said last cutting collar member.
Claim 3
Dependent Claim
95 words
In earth-piercing apparatus in accordance with claim 3, couplings between adjacent sections comprising a threaded receptacle on one of said adjacent sections and cOncentric therewith, and a projection on the other of said adjacent sections and concentric therewith, said projection including a threaded portion adapted to be received in said receptacle, and a land portion having an outer diameter less than the outer diameter of said sections, and said cutting collar members having internal bores therein complemental in size with said land portion, whereby said cutting collar members may be clamped between said adjacent sections.
Claim 4
Dependent Claim
25 words
In earth-piercing apparatus in accordance with claim 4, means on said sections to facilitate rotation of said sections for engaging said projection and said receptacle.
Claim 5
Dependent Claim
42 words
In earth-piercing apparatus in accordance with claim 4, a relief portion on said threaded portion of said projection, and lock means associated with said receptacle and adapted to contact said relief portion for locking said projection and said receptacle in interengaged relation.
Claim 6
Dependent Claim
59 words
In earth-piercing apparatus in accordance with claim 4, a spacer member having an internal bore therein, said bore having a diameter complemental to the diameter of said land portion, and said spacer having an outer dimension corresponding to the outer dimension of said sections whereby said spacer and said sections form an elongated member having a continuous outer dimension.
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) | 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 |