US3721470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary cutter apparatus for roofing material
Assignee: Individual
•
Filing: 1971-02-02
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Granted: 1973-03-20
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Expires: 1991-02-02
Abstract
Abstract A power driven rotary cutter apparatus is provided for cutting of lines in old roofing material in preparation for removing of the old roofing material and replacing it with new roofing material. The apparatus consists of a motor driven tractor having a drive member positioned substantially transversely to the direction of movement of the tractor. A heavy flywheel type wheel is positioned on the drive member, and spaced blade members are positioned around the periphery of the wheel for use in cutting of roofing material. A device is provided for adjusting the height of the blade members from a roofing surface that is to be cut by the blade members.
Inventors
- 👤 D Crispino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:12
CPC Classifications
E; E04; E04D; E04D15/00; E04D15/003; B; B23; B23C; B23C1/00; B23C1/20; E04D15/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A power driven rotary cutter apparatus, comprising, motor driven tractor means having a drive member positioned substantially transversely to the direction of movement of said tractor means, a heavy flywheel type blade means positioned on said drive member, spaced blade members positioned around periphery and on the opposite sides of said blade wheel means, means for adjusting the height of said blade members from a surface that is to be cut by said blade members, a housing open at its bottom for said blade means, means for shielding the open bottom of said housing, with said blade members being reversible.
Claim 2
Dependent Claim
100 words
A power driven rotary cutter apparatus, comprising, motor driven tractor means having a drive member positioned substantially transversely to the direction of movement of said tractor means, a heavy flywheel type blade means positioned on said drive member, spaced blade members positioned around periphery and on the opposite sides of said blade wheel means, means for adjusting the height of said blade members from a surface that is to be cut by said blade members, a housing open at its bottom for said blade means, means for shielding the open bottom of said housing, with said blade members being reversible.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |