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Patent US3949541A successfully refreshed from Google Patents.
US3949541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary mower blade with detachable end members
Assignee: Individual
•
Filing: 1974-11-14
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Granted: 1976-04-13
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Expires: 1994-11-14
Abstract
Abstract A rotary mower blade which is made up of a central section adapted for connection to the mower output shaft and having end members detachably mounted thereon which can be removed for sharpening or which can be replaced. The end members, which form the blade proper, are sharpened or serrated along one edge and have an upstanding flange at the rear edge for developing a fan action. When the blade members are mounted on the central section they are locked in place against either endwise or rotating movement thereon.
Inventors
- 👤 Keith V. Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:37
CPC Classifications
A; A01; A01D; A01D34/00; A01D34/01; A01D34/412; A01D34/63; A01D34/73
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
124 words
A blade for a rotary mower comprising; a central section including means for connection thereof to the mower output shaft, and blade members detachably mounted on the ends of said central section, each blade member having aperture means therein adapted to register with aperture means in the respective end of said central section, a spring element including mounted pin means on said central section adapted for being received in said aperture means thereby to engage said blade members and lock the blade members to the central section, and a hook element movably mounted on each said spring element and engageable over the radially outer end of the respective blade member when the blade member is in the proper position on the said central section.
Claim 2
Dependent Claim
124 words
A blade for a rotary mower comprising; a central section including means for connection thereof to the mower output shaft, and blade members detachably mounted on the ends of said central section, each blade member having aperture means therein adapted to register with aperture means in the respective end of said central section, a spring element including mounted pin means on said central section adapted for being received in said aperture means thereby to engage said blade members and lock the blade members to the central section, and a hook element movably mounted on each said spring element and engageable over the radially outer end of the respective blade member when the blade member is in the proper position on the said central section.
Claim 3
Dependent Claim
140 words
A blade according to claim 1 which includes sleeve-like pocket means on each end of said central section adapted slidably to receive said blade members from the radially outer ends of the pocket means, said aperture means in said central section extending through said pocket means, leaf spring elements having the radially inner ends fixed to said central section and having said pin means thereon near the radially outer ends, said spring elements biasing said pin means in blade member engaging direction, means for moving said spring elements in a direction to disengage said pin means from said blade members, and stop means on said blade members for abuttingly engaging at least one of the respective pocket means and the pertaining end of the said central section when the blade member is inserted the proper distance into the pocket means.
Claim 4
Dependent Claim
137 words
A blade according to claim 1 which includes sleeve-like pocket means on each end of said central section adapted slidably to receive said blade members from the radially outer ends of the pocket means, said aperture means in said central section extending through said pocket means, leaf spring elements having the radially inner ends fixed to said central section and having said pin means thereon near the radially outer ends, said spring elements biasing said pin means in blade member engaging direction, means for moving said spring elements in a direction to disengage said pin means from said blade members, and a hook element moveably mounted on each said spring element and engageable over the radially outer end of the respective blade member when the blade member is in the proper position in the respective pocket means.
Claim 5
Dependent Claim
47 words
A blade according to claim 3 which includes stop means on said blade members for abuttingly engaging at least one of the respective pocket means and the pertaining end of the said central section when the blade member is inserted the proper distance into the pocket means.
Claim 6
Dependent Claim
17 words
A blade according to claim 1 in which the leading edge of each blade member is serrated.
Claim 7
Dependent Claim
20 words
A blade according to claim 1 in which the trailing edge of each blade member has a flange upstanding therefrom.
Claim 8
Dependent Claim
41 words
A blade according to claim 1 in which the trailing edge of each blade member has a flange upstanding therefrom, each flange tapering from a lower height at the radially inner end to a greater height at the radially outer end.
Claim 9
Dependent Claim
48 words
A blade according to claim 1 wherein each said spring element is provided with a lift member fixed thereto near the radially outer end of the spring element for movement of the respective spring element in the direction to disengage said pin means from the respective blade member.
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) | 1979-04-13 | 1979-10-13 | 1980-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-13 | 1983-10-13 | 1984-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-13 | 1987-10-13 | 1988-04-13 | $7700.00 | Window Closed / Lapsed |