Patent US3638736A successfully refreshed from Google Patents.
US3638736A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corner bit structure
Assignee: Esco Corp
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Filing: 1969-06-25
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Granted: 1972-02-01
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Expires: 1989-06-25
Abstract
Abstract A corner bit for an earth-working element such as a dozer blade adapted to be mounted forwardly of a tractor or the like, the bit being an essentially triangular plate having flanges providing a mounting groove and releasably secured to the earth-working element by means of a shear block centrally of the plate.
Inventors
- 👤 Frederick C Hahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:21
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/80; E02F3/815; E02F3/8152
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
143 words
A corner bit structure comprising an adapter equipped with an aperture arranged to be attached to an excavating element, and a platelike bit equipped with an aperture releasably connected to said adapter in generally overlying relation thereto and having an exposed face and a face in confronting relation to said adapter, said bit having a generally triangular shape with integral generally L-shaped flanges on two sides installed in overlapping relation relative to said adapter, and lock means extending through said adapter and bit apertures generally centrally of said bit to releasably connect said bit to said adapter, said lock means including a shear block, said adapter being recessed about the aperture thereof to receive a portion of said block with said block being mainly received in said bit aperture, said lock means extending through said block to anchor the same to said adapter.
Claim 2
Dependent Claim
143 words
A corner bit structure comprising an adapter equipped with an aperture arranged to be attached to an excavating element, and a platelike bit equipped with an aperture releasably connected to said adapter in generally overlying relation thereto and having an exposed face and a face in confronting relation to said adapter, said bit having a generally triangular shape with integral generally L-shaped flanges on two sides installed in overlapping relation relative to said adapter, and lock means extending through said adapter and bit apertures generally centrally of said bit to releasably connect said bit to said adapter, said lock means including a shear block, said adapter being recessed about the aperture thereof to receive a portion of said block with said block being mainly received in said bit aperture, said lock means extending through said block to anchor the same to said adapter.
Claim 3
Dependent Claim
122 words
A corner bit structure comprising an adapter equipped with an aperture arranged to be attached to an excavating element, and a platelike bit equipped with an aperture releasably connected to said adapter in generally overlying relation thereto and having an exposed face and a face in confronting relation to said adapter, said bit having a generally triangular shape with integral generally L-shaped flanges on two sides installed in overlapping relation relative to said adapter, and lock means extending through said adapter and bit apertures generally centrally of said bit to releasably connect said bit to said adapter, said lock means including a shear block with said shear block being tapered in a direction generally perpendicular of the exposed face of said bit.
Claim 4
Dependent Claim
122 words
A corner bit structure comprising an adapter equipped with an aperture arranged to be attached to an excavating element, and a platelike bit equipped with an aperture releasably connected to said adapter in generally overlying relation thereto and having an exposed face and a face in confronting relation to said adapter, said bit having a generally triangular shape with integral generally L-shaped flanges on two sides installed in overlapping relation relative to said adapter, and lock means extending through said adapter and bit apertures generally centrally of said bit to releasably connect said bit to said adapter, said lock means including a shear block with said shear block being tapered in a direction generally perpendicular of the exposed face of said bit.
Claim 5
Dependent Claim
140 words
A corner bit structure comprising an adapter equipped with an aperture arranged to be attached to an excavating element, and a platelike bit equipped with an aperture releasably connected to said adapter in generally overlying relation thereto and having an exposed face and a face in confronting relation to said adapter, said bit having a generally triangular shape with integral generally L-shaped flanges on two sides installed in overlapping relation relative to said adapter, and lock means extending through said adapter and bit apertures generally centrally of said bit to releasably connect said bit to said adapter, said bit being equipped with a recess about the aperture thereof in the face confronting said adapter and with said adapter being enthickened to provide an integral portion in the face thereof confronting said bit, said integral portion mating with said bit recess.
Claim 6
Dependent Claim
140 words
A corner bit structure comprising an adapter equipped with an aperture arranged to be attached to an excavating element, and a platelike bit equipped with an aperture releasably connected to said adapter in generally overlying relation thereto and having an exposed face and a face in confronting relation to said adapter, said bit having a generally triangular shape with integral generally L-shaped flanges on two sides installed in overlapping relation relative to said adapter, and lock means extending through said adapter and bit apertures generally centrally of said bit to releasably connect said bit to said adapter, said bit being equipped with a recess about the aperture thereof in the face confronting said adapter and with said adapter being enthickened to provide an integral portion in the face thereof confronting said bit, said integral portion mating with said bit recess.
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) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |