Patents
US 9701058 B2: Spiral-wound PTFE gasket and methods of manufacture
- Granted
- 2017-07-11
- Filed
- 2016-09-16 application 15267431
- Type
- Utility · 24 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A method of manufacturing a spiral-wound PTFE gasket includes winding a laminated PTFE tape (300) around a shaft (305) that has an outer diameter that coincides with the gasket inner diameter to create a PTFE cylinder (315) having an outer diameter that coincides with the gasket outer diameter; sintering the PTFE cylinder (315); and removing a radial segment of the PTFE cylinder (315) to form the gasket (100), the radial segment having a thickness that coincides with the gasket thickness.
Source: PVGPATDIS, file of 2026-04-10 (ipg170711.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| TEADIT N.A., INC. 7 patents | US company or organization | Pasadena, TX | TEADIT N.A., INC. State business registration EXACT high confidence: identical full name and state | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Andre Carlos de Azevedo Valle | Rio de Janeiro, BR | 2 | PVGPATDIS, file of 2026-04-10 | |
| Jose Antonio de Almeida Neto | Campos do Jordão, BR | 1 | PVGPATDIS, file of 2026-04-10 | |
| Jose Carlos Carvalho Veiga | Rio de Janeiro, BR | 7 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| B29C | Shaping or joining of plastics; shaping of material in a plastic state, not otherwise provided for; after-treatment of the shaped products, e.g. repairing | B29C53/562 | PVGPATDIS, file of 2026-04-10 |
| B29B | Preparation or pretreatment of the material to be shaped; making granules or preforms; recovery of plastics or other constituents of waste material containing plastics | B29B13/06 | PVGPATDIS, file of 2026-04-10 |
| B29D | Producing particular articles from plastics or from substances in a plastic state | B29D99/0085 | PVGPATDIS, file of 2026-04-10 |
| F16J | Pistons ; cylinders; sealings | F16J15/022 | PVGPATDIS, file of 2026-04-10 |
| B29K | Indexing scheme associated with subclasses b29b, b29c or b29d, relating to moulding materials or to materials for ; moulds, ; reinforcements, fillers or preformed parts, e.g. inserts | B29K2027/18 | PVGPATDIS, file of 2026-04-10 |
| B29L | Indexing scheme associated with subclass b29c, relating to particular articles | B29L2031/265 | PVGPATDIS, file of 2026-04-10 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2016-09-16 | Assignment Assignment of assignor's interest | NETO, JOSE ANTONIO DE ALMEIDA signed 2016-09-15 VALLE, ANDRE CARLOS DE AZEVEDO signed 2016-09-15 VEIGA, JOSE CARLOS CARVALHO signed 2016-09-15 | TEADIT N.A., INC. PASADENA, TX | 39764/423 | ECORSEXC, file of 2026-09-25 |
Documents recorded with the USPTO Assignment Recordation Branch that list this patent. A security interest is a lender’s claim on the patent as collateral; a release ends it.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.