US4316677A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubular shank device
Assignee: Individual
•
Filing: 1980-03-07
•
Granted: 1982-02-23
•
Expires: 2000-03-07
Abstract
Abstract A device that has a tubular shank can be employed either for fastening or for stable mounting in unconsolidated underground strata. This shank has an oblate cross-section. For applications in which the device is driven into underground strata, the shank has a length sufficient to avoid loosening, notwithstanding possible shifting of unconsolidated strata. The shank is drivable into a bore that is sized to transversely compress the shank.
Inventors
- 👤 Armand Ciavatta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:29
CPC Classifications
E; E21; E21D; E21D20/00; E21D20/02; E21D21/00; E21D21/0026; E21D21/0093
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
142 words
A device stably mountable in unconsolidated underground strata comprising: a tubular shank having an oblate cross-section, said shank having a length sufficient to stabilize it from loosening in said underground strata, whereby said shank is forwardly drivable into a bore that is sized to transversely compress said shank, said oblate cross-section providing annularly spaced wall engaging peripheral portions for frictionally engaging the wall of a bore in the strata and annularly spaced non-wall engaging peripheral portions which are spaced radially from the wall of the bore, said portions being integrally interconnected in annular force translating relation throughout a substantial portion of the length of the tubular shank such that frictional interengagement with the wall of the bore will result in a radially inward deflection of said wall engaging portions which deflection is accommodated by radially outward deflection of said non-wall engaging portions.
Claim 2
Independent Claim
142 words
A device stably mountable in unconsolidated underground strata comprising: a tubular shank having an oblate cross-section, said shank having a length sufficient to stabilize it from loosening in said underground strata, whereby said shank is forwardly drivable into a bore that is sized to transversely compress said shank, said oblate cross-section providing annularly spaced wall engaging peripheral portions for frictionally engaging the wall of a bore in the strata and annularly spaced non-wall engaging peripheral portions which are spaced radially from the wall of the bore, said portions being integrally interconnected in annular force translating relation throughout a substantial portion of the length of the tubular shank such that frictional interengagement with the wall of the bore will result in a radially inward deflection of said wall engaging portions which deflection is accommodated by radially outward deflection of said non-wall engaging portions.
Claim 3
Dependent Claim
18 words
A device according to claim 1 wherein said shank comprises: an elliptic cylinder having a tapered forward end.
Claim 4
Dependent Claim
13 words
A device according to claim 1 wherein said tapered forward end is domed.
Claim 5
Dependent Claim
13 words
A device according to claim 1 wherein said shank has a spiral rib.
Claim 6
Dependent Claim
33 words
A device according to claim 1 wherein said shank is undulated in a given transverse direction, said transverse direction being parallel to the chord of said oblate cross-section which defines its minimum thickness.
Claim 7
Dependent Claim
14 words
A device according to claim 2 wherein said shank has a flared aft end.
Claim 8
Dependent Claim
54 words
A device according to claim 1 wherein said shank has a smaller aft section adjacent an end of the shank, said aft section being sized to cause less friction than portions having said oblate cross-section, whereby the force required to fully drive said shank into said bore is reduced due to said aft portion.
Claim 9
Dependent Claim
45 words
A device according to claim 6 further including: an annulus coaxially mounted in the flared end of said shank, said annulus having an inside diameter smaller than that of said shank, said annulus being sized to reinforce and provide a ramming surface for said shank.
Claim 10
Dependent Claim
25 words
A device according to claim 6 wherein said shank has at least one flat surface sized to allow gripping and twisting thereof by a tool.
Claim 11
Dependent Claim
43 words
A device according to claim 6 wherein said flared end has an outwardly diverging section followed by a rearwardly directed section, said flared end including on its inside surface a weld bead at the intersection of said diverging and said rearwardly directed section.
Claim 12
Dependent Claim
46 words
A device according to claim 1 wherein said shank has an annular crimp near its aft end, said device further comprising: a retaining ring mounted in and extending outwardly from said crimp, said crimp having a depth less than the wall thickness of said tubular shank.
Claim 13
Dependent Claim
25 words
A device according to claim 1 wherein said shank has a central section that converges in a rearward direction whereby final insertion force is moderated.
Claim 14
Dependent Claim
30 words
A device according to claim 1 wherein said shank has a central section that converges in a forward direction, whereby gripping is relatively greater toward the aft of said shank.
Claim 15
Dependent Claim
36 words
A device according to claim 1 wherein said shank has a larger aft section adjacent an end of said shank, said aft section being sized to provide relatively greater gripping toward the aft of said shank.
Claim 16
Dependent Claim
40 words
A device according to claim 1 wherein said shank is associated with a plate having a central aperture therein of a shape operable to deform a tubular cylindrical blank forced longitudinally therethrough into said tubular shank having said oblate cross-section.
Claim 17
Dependent Claim
14 words
A device according to claim 15 wherein said aperture and oblate cross-section are elliptical.
References Cited (Backward Citations)
US590953A
Cited
US590954A
Cited
US969550A
Cited
US1637419A
Cited
US1669014A
Cited
US2014892A
Cited
US2566573A
Cited
US2682152A
Cited
GB670870A
Cited
US3349567A
Cited
US3425311A
Cited
FR1525224A
Cited
US3630261A
Cited
US3819101A
Cited
US3653217A
Cited
DE2109599A1
Cited
US3863825A
Cited
US3922867A
Cited
US4040260A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-02-22 | 1985-08-24 | 1986-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-02-22 | 1989-08-24 | 1990-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-02-22 | 1993-08-24 | 1994-02-23 | $7700.00 | Window Closed / Lapsed |