Patents
US 7758017 B2: Butterfly valves and construction thereof
- Granted
- 2010-07-20
- Filed
- 2007-01-22 application 11625811
- Type
- Utility · 20 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
Various exemplary embodiments of a butterfly-type valve that provide a reduction in the unseating torque are disclosed that include a valve body defining a flow passage therein, and a closure disc disposed in the flow passage that has an axis of rotation about which the closure disc rotates between open and closed positions. The valve includes a cylindrical body liner disposed within the valve, which includes a circumferential sealing surface that is engaged by the closure disc to establish a seal when the closure disc is rotated to a closed position. At least one resilient band is at least partially interposed between the valve body and the cylindrical body liner, and at least a portion of the resilient band is tapered to a reduced thickness. The taper reduces the forces associated with the engagement by the closure disc, to thereby reduce the unseating torque required to open the closure disc.
Source: PVGPATDIS, file of 2026-04-10 (ipg100720.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Sure Seal, Inc. 2 patents | US company or organization | Mineral Point, MO | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Gregory E. Sisk | Farmington, MO | 12 | PVGPATDIS, file of 2026-04-10 | |
| Sidney A. Rovira, III | Gonzales, LA | 12 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| F16K | Valves; taps; cocks; actuating-floats; devices for venting or aerating | F16K1/2265 | 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 |
|---|---|---|---|---|---|
| 2011-02-23 | Assignment Assignment of assignor's interest | SURE SEAL, INC. signed 2011-02-23 | DELAWARE CAPITAL FORMATION INC. WILMINGTON, DE | 25850/935 | ECORSEXC, file of 2026-09-25 |
| 2010-06-09 | Assignment Assignment of assignor's interest | ROVIRA, SIDNEY, III signed 2010-06-09 SISK, GREGORY E. signed 2010-06-09 | SURE SEAL, INC. MINERAL POINT, MO | 24509/664 | 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.