Patent US4838729A successfully refreshed from Google Patents.
US4838729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soil stabilizing apparatus
Assignee: Individual
•
Filing: 1988-11-04
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Granted: 1989-06-13
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Expires: 2008-11-04
Abstract
Abstract An apparatus to stabilize a surface. The apparatus includes a carrier arranged for movement over the surface to be stabilized. A reel is mounted on the carrier for rotation about an axis of rotation transverse to the direction of movement of the carrier. The reel has a plurality of circumferentially spaced cutter bars that extend the length of the reel parallel to the axis of rotation. The reel can be lifted and lowered relative to the surface. The trailing face of each cutter bar has an area formed to reduce pressure at the trailing face as the cutter bar rotates.
Inventors
- 👤 Donald A. Chennels
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 18:50
CPC Classifications
E; E01; E01C; E01C21/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
106 words
An apparatus for stabilizing a surface, the apparatus including a carrier arranged for movement over the surface to be stabilized, a reel mounted on the carrier for rotation about an axis of rotation transverse to the direction of movement of the carrier, the reel having a plurality of circumferentially spaced cutter bars that extend the length of the reel parallel to the axis of rotation, lifting means for lifting and lowering the reel relative to the surface the improvement comprising forming the trailing face of each cutter bar with means to produce a zone of reduced pressure at said trailing face as the cutter bar rotates.
Claim 2
Independent Claim
106 words
An apparatus for stabilizing a surface, the apparatus including a carrier arranged for movement over the surface to be stabilized, a reel mounted on the carrier for rotation about an axis of rotation transverse to the direction of movement of the carrier, the reel having a plurality of circumferentially spaced cutter bars that extend the length of the reel parallel to the axis of rotation, lifting means for lifting and lowering the reel relative to the surface the improvement comprising forming the trailing face of each cutter bar with means to produce a zone of reduced pressure at said trailing face as the cutter bar rotates.
Claim 3
Dependent Claim
22 words
An apparatus as claimed in claim 1 in which the trailing face of each cutter bar is formed with a longitudinal recess.
Claim 4
Dependent Claim
16 words
An apparatus as claimed in claim 2 in which the recess is generally semi-circular in section.
Claim 5
Dependent Claim
22 words
An apparatus as claimed in claim 1 in which the trailing face is cut away to narrow with distance from the reel.
Claim 6
Dependent Claim
36 words
An apparatus as claimed in claim 4 in which the leading face is also cut away so that the bar is of truncated triangular section with the base of the truncated triangle at the reel periphery.
Claim 7
Dependent Claim
37 words
An apparatus as claimed in claim 1 in which the cutter bar is formed with a plurality of separate members, each member being formed with means to produce a zone of reduced pressure at the trailing face.
Claim 8
Dependent Claim
17 words
An apparatus as claimed in claim 6 in which the separate members are welded onto the bar.
References Cited (Backward Citations)
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US1614225A
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US2397782A
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US2547325A
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US3675973A
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US4705017A
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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) | 1992-06-12 | 1992-12-12 | 1993-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-12 | 1996-12-12 | 1997-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-12 | 2000-12-12 | 2001-06-13 | $7700.00 | Window Closed / Lapsed |