US3873106A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Jointless packing ring and method of making same
Assignee: First National Bank of South Carolina
•
Filing: 1972-04-17
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Granted: 1975-03-25
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Expires: 1992-04-17
Abstract
Abstract Jointless packing rings are made by passing one or more ends of yarn through a bath of heat-curable polymeric binder, winding the yarn in the form of an annular helix, coating the exterior surfaces of the yarn helix with additional polymeric binder, and subjecting the yarn helix to heat and pressure to consolidate the yarn convolutions upon each other and to set the binder.
Inventors
- 👤 Eugene Pastelak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:29
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/02; F16J15/021; F16J15/022; F16J15/16; F16J15/18; F16J15/20; Y; Y10; Y10S; Y10S277/00; Y10S277/935; Y10S277/944; Y10S277/945
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
27 words
A jointless packing ring according to claim 1 containing from about 30 to about 50 percent of binder, based on the combined weight of yarn and binder.
Claim 2
Dependent Claim
16 words
A jointless packing ring according to claim 1 in which said polymeric binder comprises a fluoroelastomer.
Claim 3
Dependent Claim
15 words
A jointless packing ring according to claim 1 in which said polymeric binder comprises polytetrafluoroethylene.
Claim 4
Dependent Claim
22 words
A packing ring according to claim 1 having a thickness measured in the radial direction of from 1/8 to 1 1/2 inches.
Claim 5
Dependent Claim
16 words
A packing ring according to claim 1 in which the side surfaces thereof are substantially V-shaped.
References Cited (Backward Citations)
US2459721A
Cited
US3097990A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |