US3905182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary mower
Assignee: Individual
•
Filing: 1974-02-13
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Granted: 1975-09-16
•
Expires: 1994-02-13
Abstract
Abstract A rotary mower comprises a cutting cylinder with a collar section, having a plurality of blades mounted thereabout at spaced intervals. The blades are rotatable about their mounting to prevent damage when the blade strikes loose stones and the like. The blade may be mounted within a channel style roof or a predetermined collar section or collar ring which permit a complete or partial rotation of the blade. The mower also includes suitable ducts and at least one radially arranged vane on the underside of each cutting cylinder with one saucer underneath each cutting cylinder and at least one predetermined lamination inside each saucer to provide a vertical updraft whereby the material being cut by the mower is elevated upwards for cutting purposes.
Inventors
- 👤 Horst W Geier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:18
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/63; A01D34/73; A01D34/736; A01D34/64; A01D34/66
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
105 words
In a rotary mower, the combination comprising: a mower body rotatable about a generally vertical axis; including a generally vertical cylinder in the center thereof, a collar portion fixed to the bottom of said cylinder, a plurality of protective housings located about the periphery of the collar portion and a cutting knife mounted in each housing, said knives being rotatable about their mounting upon striking an object and said mountings being protected on the upper and lower surfaces by the housings, and a freely rotatable protective saucer mounted to the mower body at the lower end thereof at a predetermined distance from the collar portion.
Claim 2
Dependent Claim
105 words
In a rotary mower, the combination comprising: a mower body rotatable about a generally vertical axis; including a generally vertical cylinder in the center thereof, a collar portion fixed to the bottom of said cylinder, a plurality of protective housings located about the periphery of the collar portion and a cutting knife mounted in each housing, said knives being rotatable about their mounting upon striking an object and said mountings being protected on the upper and lower surfaces by the housings, and a freely rotatable protective saucer mounted to the mower body at the lower end thereof at a predetermined distance from the collar portion.
Claim 3
Dependent Claim
81 words
A rotary mower in accordance with claim 1 wherein: the mower body includes a lower collar portion having a beveled peripheral section, and, the protective housings each comprise a channel type element mounted on the peripheral portion of the collar with a depth approximately equal to the beveled rim portion and having a roof portion spaced above said rim portion to provide clearance for the blade mounted therein so that said blade can move in a complete circle within said element.
Claim 4
Dependent Claim
56 words
A rotary mower in accordance with claim 2 wherein: the mower further includes a bolt and a nut, wherein the nut is welded to the underside of the collar portion, and the blade and channel type elements include corresponding apertures which engage the bolt so that each blade is rotatably mounted within a channel type member.
Claim 5
Dependent Claim
31 words
A rotary mower in accordance with claim 1 wherein: the mower further includes a rotatable protective member mounted on the bottom of said cylinder at a predetermined distance above the saucer.
Claim 6
Dependent Claim
31 words
A rotary mower in accordance with claim 2 wherein: the protective housings are open at the interior end facing the cylinder to permit rotation of the blade in a full circle.
Claim 7
Dependent Claim
64 words
A rotary mower in accordance with claim 1 wherein: the protective housings each comprise a channel type element mounted on the peripheral portion of the collar having means limiting the swinging action of the blade within a range of approximately 70* to 170* towards both sides to prevent the knife from becoming lodged in a position approximately 180* opposed to its theoretical cutting position.
Claim 8
Dependent Claim
25 words
A rotary mower in accordance with claim 6 wherein: the channel type elements have a depth approximately equal to any portion of each knife''s length.
Claim 9
Dependent Claim
43 words
A rotary mower in accordance with claim 1 wherein: the collar portion includes a plurality of radially extending raised portions each forming a protective knife housing open at the end facing the cylinder to permit rotation of the knife in a full circle.
Claim 10
Dependent Claim
51 words
A rotary mower in accordance with claim 1 wherein: the collar section includes a plurality of radially extending raised portions each forming a protective knife housing, the housings being closed at a distance from the pivot point of each knife to limit the swinging action of the knife within predetermined limits.
Claim 11
Dependent Claim
61 words
A rotary mower in accordance with claim 9 wherein: the raised portion of each housing and each knife include a corresponding hole, and, said mower further includes a bolt positioned within each of said holes with a shank portion extending downwardly therefrom and a spring member engaging the shank portion whereby said knife may be readily replaced by actuating said spring.
Claim 12
Dependent Claim
84 words
A rotary mower in accordance with claim 9 wherein: the raised portion of each housing and each knife include a corresponding hole, and, said mower further includes a bolt positioned within said holes with a shank portion extending downwardly therefrom and a spring member extending over the full width of the raised housing portion in such a manner that the underside of the spring and the underside of the collar portion are flush with each other to form a safely closed knife bearing channel.
Claim 13
Dependent Claim
75 words
A rotary mower in accordance with claim 1 wherein: the mower further includes a continuous collar spring ring mounted on top of the periphery of the collar section at a predetermined distance therefrom to provide the protective housings for said knives and further including a plurality of bolts fixed to the collar section and extending upwardly through said collar and ring and wherein the knives each include an aperture engaged by one of the bolts.
Claim 14
Dependent Claim
34 words
A rotary mower in accordance with claim 12 wherein: the collar includes a plurality of radial prongs extending inwardly from said ring with said prongs having free interior ends mounted to the collar section.
Claim 15
Dependent Claim
42 words
A rotary mower in accoRdance with claim 12 wherein: said collar ring includes a plurality of radial prongs extending inwardly from the ring with radial cuts between adjacent prongs so that each knife carrying portion can be depressed individually for knife changes.
Claim 16
Dependent Claim
37 words
A rotary mower in accordance with claim 1 wherein: the mower further includes a spring ring collar mounted underneath the periphery of the collar section at a predetermined distance therefrom to provide a housing for the knives.
Claim 17
Dependent Claim
53 words
A rotary mower in accordance with claim 4 wherein: the protective saucer is in the form of a convex dome, and, the protective bottom member is in the form of a convex dome similar in configuration to the saucer and having an outside diameter substantially equal to the perimeter of the collar section.
Claim 18
Dependent Claim
25 words
A rotary mower in accordance with claim 1 wherein: the cylinder includes air intake ducts extending downwardly through the collar portion into the saucer area.
Claim 19
Dependent Claim
65 words
A rotary mower in accordance with claim 17 wherein: the mower further includes at least one radially arranged vane mounted beneath the collar section, at least one vertical lamination on the saucer, and, wherein an updraft is provided for directing the material to be cut into the knife blades, for cooling the mower''s gears and bearings and for removing dirt and dust in the saucers.
Claim 20
Dependent Claim
96 words
In a rotary mower, the combination comprising: drive means for the mower, a rotary portion coupled to the drive means and having a collar portion mounted thereto, at least one protective housing located about the periphery of the collar portion and a cutting knife mounted in each housing, said knives being rotatable about their mounting upon striking an object and said mountings being protected on the upper and lower surfaces by the housings, and, a non-rotatable protective saucer mounted to the mower body at the lower end thereof at a predetermined distance from the collar portion.
Claim 21
Dependent Claim
96 words
In a rotary mower, the combination comprising: drive means for the mower, a rotary portion coupled to the drive means and having a collar portion mounted thereto, at least one protective housing located about the periphery of the collar portion and a cutting knife mounted in each housing, said knives being rotatable about their mounting upon striking an object and said mountings being protected on the upper and lower surfaces by the housings, and, a non-rotatable protective saucer mounted to the mower body at the lower end thereof at a predetermined distance from the collar portion.
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) | 1978-09-15 | 1979-03-17 | 1979-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-15 | 1983-03-17 | 1983-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-15 | 1987-03-17 | 1987-09-16 | $7700.00 | Window Closed / Lapsed |