US4229933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separable mower blade
Assignee: Individual
•
Filing: 1979-03-07
•
Granted: 1980-10-28
•
Expires: 1999-03-07
Abstract
Abstract Disclosed herein is a separable mower blade comprising a stem portion affixed to the drive axis of a rotary type mower shaft, a blade connected thereto and a slot disposed on the blade for reception of a bolt which is affixed to the stem portion so as to fasten the two together. A shroud is provided over the area of interconnection so as to firmly affix the two elements, the blade and the stem together and is so constructed to allow its easy removal so that blades may be taken off with a minimal amount of time and tools used therefore.
Inventors
- 👤 Roy A. Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:47
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/63; A01D34/73; A01D34/733
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
141 words
A blade which is separable from a stem of a mower bar in which the area of interconnection comprises a cut away slot disposed on said blade which extends to a hexagonal cut out area nearer a tip of the blade, and a bolt extending through a terminal portion of the stem having a nut with a substantially hexagonal configuration whereby said stem and said blade can be interconnected by juxtaposing the hexagonal bolt with said hexagonal cut out area, and sliding said blade outwardly so that said hexagonal bolt rides within said slot and a protective shroud means overlying the area of interconnection between said blade and said stem which further retains said blade and stem, said shroud means having a depression which resides within said hexagonal cut out area to resist relative motion of said blade and said stem.
Claim 2
Dependent Claim
141 words
A blade which is separable from a stem of a mower bar in which the area of interconnection comprises a cut away slot disposed on said blade which extends to a hexagonal cut out area nearer a tip of the blade, and a bolt extending through a terminal portion of the stem having a nut with a substantially hexagonal configuration whereby said stem and said blade can be interconnected by juxtaposing the hexagonal bolt with said hexagonal cut out area, and sliding said blade outwardly so that said hexagonal bolt rides within said slot and a protective shroud means overlying the area of interconnection between said blade and said stem which further retains said blade and stem, said shroud means having a depression which resides within said hexagonal cut out area to resist relative motion of said blade and said stem.
Claim 3
Dependent Claim
41 words
The device of claim 1 wherein said protective shroud means overlying the area of interconnection has a U-shaped configuration wherein the bottom of said U defines a side edge, a handle disposed on said side edge, and a planar bottom face.
Claim 4
Dependent Claim
57 words
The device of claim 2 wherein said shroud means further includes a planar top face in which a central area is provided with said depression which has slits on opposed sides of said depression in which said slots extend radially outward towards the tip of the blade up to walls of said hexagonal cutout for added resistance.
Claim 5
Dependent Claim
58 words
The device of claim 3 wherein means for overlying said bolt are provided which include an upstanding portion lying behind said depression relative to the blade having a top portion connecting three upstanding side walls whereby said upstanding portions overlie the bolt in such a manner as to discourage relative rotation of the nut relative to the bolt.
Claim 6
Dependent Claim
16 words
The device of claim 4 in which said depression is providing with a spring type resilience.
References Cited (Backward Citations)
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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) | 1983-10-28 | 1984-04-28 | 1984-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-28 | 1988-04-28 | 1988-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-28 | 1992-04-28 | 1992-10-28 | $7700.00 | Window Closed / Lapsed |