Patents
US 7520925 B2: Filter and silencer with a quick disconnect lid
- Granted
- 2009-04-21
- Filed
- 2006-12-19 application 11641287
- Type
- Utility · 10 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A filter silencer with quick disconnect lid has a cylindrical hollow casing, an inlet, a filter within the casing, a spring loaded seal plate beneath the filter, a flange opposite the inlet, and a lid turning to connect to the flange. The inlet admits blower air into the casing generally beneath the spring loaded seal and the air enters the sides of the filter. The air travels upwards through the filter and exits through the lid. Wear pads beneath a locking ring engage the tapered ears upon the lid. The lid has an outlet through which filtered air discharges. The lid has ports for monitoring differential pressure and air temperature while the casing has a port for a pressure relief valve.
Source: PVGPATDIS, file of 2026-04-10 (ipg090421.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Sure Seal, Inc. 2 patents | US company or organization | Saint Paul, MO | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| David E. Sisk | Bonne Terre, MO | 36 | PVGPATDIS, file of 2026-04-10 | |
| Roger Breakfield | Potosi, MO | 5 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| B01D | Separation | B01D46/52 | 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 |
|---|---|---|---|---|---|
| 2009-07-23 | Assignment Assignment of assignor's interest | SURE SEAL, INC. signed 2009-06-29 | DELAWARE CAPITAL FORMATION, INC. WILMINGTON, DE | 23003/485 | 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.