US4711434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring disc
Assignee: Individual
•
Filing: 1986-07-07
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Granted: 1987-12-08
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Expires: 2006-07-07
Abstract
Abstract A solid spring disc is made of resiliently yieldable material and is shaped as a shallow cone whose upper and lower surfaces are corrugated and are defined by a plurality of angularly spaced triangular segments of identical size and shape and disposed in adjoining side-by-side relation. The substantially linear force/deflection range of the spring disc is significantly longer than that of a conventional Belleville spring of comparable size and thus the spring disc possesses a substantially lower spring rate.
Inventors
- 👤 Donald L. Haag
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:01
CPC Classifications
F; F16; F16F; F16F1/00; F16F1/02; F16F1/32; F16F1/328
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
175 words
A solid spring disc made of resiliently yieldable material and having first and second oppositely facing surfaces, said disc having a generally circular periphery and being shaped as a shallow right circular cone, each surface of said disc being defined by a plurality of angularly spaced and flat and planar triangular segments of identical size and shape disposed in adjoining side-by-side relation, each of said triangular segments having a pair of side margins, having an apex located at the apex of said cone and having a base located opposite the apex of the segment and extending along the periphery of said disc, and adjoining segments being inclined at equal oblique angles relative to a plane extending perpendicular to the axis of said cone and being inclined relative to said plane in such a direction that adjoining side margins of adjoining segments define a crest on one surface of said disc and define a valley on the opposite surface of said disc, said crests and valleys alternating with one another around each surface of said disc.
Claim 2
Dependent Claim
175 words
A solid spring disc made of resiliently yieldable material and having first and second oppositely facing surfaces, said disc having a generally circular periphery and being shaped as a shallow right circular cone, each surface of said disc being defined by a plurality of angularly spaced and flat and planar triangular segments of identical size and shape disposed in adjoining side-by-side relation, each of said triangular segments having a pair of side margins, having an apex located at the apex of said cone and having a base located opposite the apex of the segment and extending along the periphery of said disc, and adjoining segments being inclined at equal oblique angles relative to a plane extending perpendicular to the axis of said cone and being inclined relative to said plane in such a direction that adjoining side margins of adjoining segments define a crest on one surface of said disc and define a valley on the opposite surface of said disc, said crests and valleys alternating with one another around each surface of said disc.
Claim 3
Dependent Claim
193 words
A solid spring disc made of resiliently yieldable material and having a generally circular periphery, said disc being shaped as a shallow and upright right circular cone and having a generally convex upper surface and a generally concave lower surface, each surface of said disc being defined in its entirety by an array of angularly spaced and flat and planar triangular segments of identical size and shape disposed in adjoining side-by-side relation, each of said triangular segments having a pair of side margins, having an upper apex located at the apex of the cone and having a lower base extending along the periphery of said disc, adjoining segments being inclined at equal angles relative to a horizontal plane extending perpendicular to the axis of the cone and being inclined relative to said plane in such a direction that adjoining side margins of adjoining segments define a crest on one surface of said disc and define a valley on the opposite surface of said disc, said crests and valleys alternating with one another around each surface of said disc, and each of said crests and valleys radiating continuously from the apex of the cone.
Claim 4
Dependent Claim
193 words
A solid spring disc made of resiliently yieldable material and having a generally circular periphery, said disc being shaped as a shallow and upright right circular cone and having a generally convex upper surface and a generally concave lower surface, each surface of said disc being defined in its entirety by an array of angularly spaced and flat and planar triangular segments of identical size and shape disposed in adjoining side-by-side relation, each of said triangular segments having a pair of side margins, having an upper apex located at the apex of the cone and having a lower base extending along the periphery of said disc, adjoining segments being inclined at equal angles relative to a horizontal plane extending perpendicular to the axis of the cone and being inclined relative to said plane in such a direction that adjoining side margins of adjoining segments define a crest on one surface of said disc and define a valley on the opposite surface of said disc, said crests and valleys alternating with one another around each surface of said disc, and each of said crests and valleys radiating continuously from the apex of the cone.
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) | 1990-12-07 | 1991-06-08 | 1991-12-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-07 | 1995-06-08 | 1995-12-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-07 | 1999-06-08 | 1999-12-08 | $7700.00 | Window Closed / Lapsed |