Patent US3576216A successfully refreshed from Google Patents.
US3576216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring mounting for disc harrow blades
Assignee: Deutz Allis Corp
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Filing: 1969-03-21
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Granted: 1971-04-27
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Expires: 1989-03-21
Abstract
Abstract Apparatus for minimizing damage to discs in a disc harrow implement by providing supports for the discs in the nature of multileaf springs so that upon contacting an obstruction the outer portion of the disc will flex adjacent the edge of the outer spring leaf and if the load to which the disc is being subjected is even greater then the disc will also flex about the edge of the next spring leaf closer to the center of the disc and the load is heavy enough the disc will also flex about the outer periphery of the spacers at which point the disc is mounted substantially rigid, and some deflection may take place in the standard supporting the discs and their gang bolt.
Inventors
- 👤 Willard H Tanke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:18
CPC Classifications
A; A01; A01B; A01B23/00; A01B23/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
234 words
In a ground working tool, a gang bolt, a ground working disc having an aperture through which said bolt extends, a plurality of spring steel discs mounted on said bolt with at least one of said spring steel discs being mounted on each side of said ground working disc in contacting relation thereto, a pair of spacer spools mounted on said bolt outboard from said spring steel discs for comparing said spring steel discs and said ground working disc in rigid relation to said bolt, said spring steel discs having a greater diameter than said spools and a lesser diameter than said ground working disc, the spring steel discs positioned adjacent to said working disc being formed to contact said working disc from said bolt to the peripheral surface of said spring steel discs to provide a leaf spring support for said working disc, one of said discs contacting said ground working disc having a diameter greater than the other of said contacting discs, an additional spring steel disc mounted between one of said contacting discs and one of said spools, said additional disc being of a diameter less than the adjacent contacting disc and being of a conformation complementary to said adjacent disc so as to contact same from said bolt to the periphery of said additional disc to provide an additional spring in the leaf spring mounting of said ground working disc.
Claim 2
Dependent Claim
234 words
In a ground working tool, a gang bolt, a ground working disc having an aperture through which said bolt extends, a plurality of spring steel discs mounted on said bolt with at least one of said spring steel discs being mounted on each side of said ground working disc in contacting relation thereto, a pair of spacer spools mounted on said bolt outboard from said spring steel discs for comparing said spring steel discs and said ground working disc in rigid relation to said bolt, said spring steel discs having a greater diameter than said spools and a lesser diameter than said ground working disc, the spring steel discs positioned adjacent to said working disc being formed to contact said working disc from said bolt to the peripheral surface of said spring steel discs to provide a leaf spring support for said working disc, one of said discs contacting said ground working disc having a diameter greater than the other of said contacting discs, an additional spring steel disc mounted between one of said contacting discs and one of said spools, said additional disc being of a diameter less than the adjacent contacting disc and being of a conformation complementary to said adjacent disc so as to contact same from said bolt to the periphery of said additional disc to provide an additional spring in the leaf spring mounting of said ground working disc.
Claim 3
Dependent Claim
47 words
In a ground working tool as recited in claim 1 and wherein said discs are concave-convex and said additional disc is mounted adjacent to the convex side of said one of said discs and being spaced from said ground working disc by said one of said discs.
Claim 4
Dependent Claim
60 words
In a ground working tool as recited in claim 2 wherein the spring steel disc positioned adjacent the concave side of said ground working disc is a flat disc and is deformed to assume a shape complementary to the concave side of said ground working disc by a tightening action of said bolt for moving said spools towards each other.
Claim 5
Dependent Claim
30 words
In a ground working tool as recited in claim 3 and wherein said additional disc has a diameter less than the diameter of the spring steel disc mounted adjacent thereto.
Claim 6
Dependent Claim
40 words
In a ground working tool as recited in claim 4 and wherein the diameter of said additional steel disc is equal to the diameter of the spring steel disc mounted adjacent to the concave side of said ground wording disc.
References Cited (Backward Citations)
US1183828A
Cited
GB261823A
Cited
US2197424A
Cited
DE806176C
Cited
US2773343A
Cited
GB776767A
Cited
FR1284428A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |