US5098346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sprocket
Assignee: Gates Corp
•
Filing: 1990-04-13
•
Granted: 1992-03-24
•
Expires: 2010-04-13
Abstract
Abstract A toothed sprocket with rim portion made of a first composite material of discontinuous fiber disposed in a plastic matrix and where the teeth of the rim portion are covered with an encircling layer of a second composite material that includes a fibrous material and an elastomeric matrix and fibers embedded in the matrix.
Inventors
- 👤 John D. Redmond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:59
CPC Classifications
F; F16; F16H; F16H55/00; F16H55/02; F16H55/17; F16H55/171
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
73 words
In a sprocket with (1) a toothed rim portion that includes a first composite material of fiber dispersed in a plastic matrix and (2) a hub portion, and wherein the improvement comprises: at least one contoured encircling surface layer of a second composite material of an elastomer and a fibrous material free of glass fiber covering teeth of the toothed rim portion wherein the elastomer defines an elastomeric matrix having embedded fibrous material.
Claim 2
Dependent Claim
73 words
In a sprocket with (1) a toothed rim portion that includes a first composite material of fiber dispersed in a plastic matrix and (2) a hub portion, and wherein the improvement comprises: at least one contoured encircling surface layer of a second composite material of an elastomer and a fibrous material free of glass fiber covering teeth of the toothed rim portion wherein the elastomer defines an elastomeric matrix having embedded fibrous material.
Claim 3
Dependent Claim
20 words
The sprocket as claimed in claim 1 and wherein the first composite material includes a plurality of successive encircling layers.
Claim 4
Dependent Claim
27 words
The sprocket as claimed in claim 2 wherein the plurality of successive encircling layers of the first composite material are generally in the form of a volute.
Claim 5
Dependent Claim
32 words
The sprocket as claimed in claim 3 and wherein the hub portion is also of the first composite material and has a plurality of spaced circumjacent internal teeth that define a spline.
Claim 6
Dependent Claim
23 words
The sprocket as claimed in claim 1 wherein the fibers in the encircling surface layer of second composite material include discontinuous aramid fibers.
Claim 7
Dependent Claim
23 words
The sprocket as claimed in claim 1 wherein the fibers in the encircling surface layer of second composite material include a nylon fabric.
Claim 8
Dependent Claim
33 words
The sprocket as claimed in claim 1 wherein the encircling surface layer of second composite material includes a first layer of embedded, discontinuous aramid fibers and a second layer of embedded nylon fabric.
Claim 9
Dependent Claim
13 words
The sprocket as claimed in claim 6 wherein the fabric is square woven.
Claim 10
Dependent Claim
29 words
The sprocket as claimed in claim 1 wherein the first composite material includes fiber dispersed in a plastic matrix selected from the group consisting of an epoxy and vinylester.
Claim 11
Dependent Claim
41 words
The sprocket as claimed in claim 1 wherein the first composite material has fiber dispersed in a plastic matrix said fibers having a length of at least 0.5 in. and occupying at least 60 percent by volume of the plastic matrix.
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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) | 1995-03-24 | 1995-09-23 | 1996-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-24 | 1999-09-23 | 2000-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-24 | 2003-09-23 | 2004-03-24 | $7700.00 | Window Closed / Lapsed |