Patents
US 11655815 B2: Semi-rigid stator
- Granted
- 2023-05-23
- Filed
- 2020-12-14 application 17120803
- Type
- Utility · 18 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A semi-rigid stator is provided for a helical gear device. The stator includes a stack of rigid rings, a deformable layer, and a rigid housing. Each of the rigid rings has a central opening and an exterior surface. The rigid rings are aligned along a common centerline and rotated slightly relative to each other such that the stack of rigid rings forms a helically convoluted chamber. Each of the rigid rings is secured within the rigid stator housing by the deformable layer disposed between the exterior surface of each of the rigid rings and the rigid housing. The deformable layer bonds the rigid rings together as the ring stack and permits movement of the rigid rings relative to each other.
Source: PVGPATDIS, file of 2026-04-10 (ipg230523.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| ROPER PUMP COMPANY, LLC 17 patents | US company or organization | Wilmington, DE | ROPER PUMP COMPANY LLC State business registration EXACT high confidence: identical full name and state | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Trevor Mark Brasselle | Starrs Mill, GA | 1 | PVGPATDIS, file of 2026-04-10 | |
| Brian Lee Gerdes | Dacula, GA | 1 | PVGPATDIS, file of 2026-04-10 | |
| Gregory Richard Ferguson | Gillsville, GA | 1 | PVGPATDIS, file of 2026-04-10 | |
| Cody Richard Reynolds | Covington, GA | 2 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| F04C | Rotary-piston, or oscillating-piston, positive-displacement machines for liquids ; rotary-piston, or oscillating-piston, positive-displacement pumps | F04C2/1075 | PVGPATDIS, file of 2026-04-10 |
| F01C | Rotary-piston or oscillating-piston machines or engines | F01C21/104 | 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 |
|---|---|---|---|---|---|
| 2026-08-31 | Release of security interest Release (reel 061997 / frame 0614) | UBS AG, STAMFORD BRANCH signed 2026-08-26 | ALPHA TECHNOLOGIES SERVICES LLC HUDSON, OH AMOT CONTROLS LLC HOUSTON, TX COMPRESSOR CONTROLS LLC DES MOINES, IA CORNELL PUMP COMPANY LLC CLACKAMAS, OR DYNISCO INSTRUMENTS LLC FRANKLIN, MA HANSEN TECHNOLOGIES LLC BURR RIDGE, IL METRIX INSTRUMENT CO., L.P. HOUSTON, TX PRECISION ANALYZER COMPANY L.P. (FKA PETROLEUM ANALYZER COMPANY L.P.) HOUSTON, TX INDICOR HOLDCO LLC (FKA ROPER HOLDINGS, LLC) LAKEWOOD RANCH, FL INDICOR LLC (FKA ROPER INDUSTRIAL PRODUCTS INVESTMENT COMPANY LLC) LAKEWOOD RANCH, FL ROPER PUMP COMPANY LLC COMMERCE, GA STRUERS LLC WESTLAKE, OH VIATRAN CORPORATION TONAWANDA, NY | 76337/221 | PASDL, file of 2026-10-15 |
| 2026-08-27 | Security interest Security interest Security interest | CORNELL PUMP COMPANY LLC signed 2026-08-26 HIGH TIDE TECHNOLOGIES LLC signed 2026-08-26 ROPER PUMP COMPANY LLC signed 2026-08-26 | UBS AG, STAMFORD BRANCH, AS COLLATERAL AGENT STAMFORD, CT | 76275/306 | PASDL, file of 2026-10-15 |
| 2025-11-13 | Correction Corrective assignment to correct the patent number previously recorded at reel: 61997 frame: 614. assignor(s) hereby confirms the security agreement. | ALPHA TECHNOLOGIES SERVICES LLC signed 2022-11-22 AMOT CONTROLS LLC signed 2022-11-22 COMPRESSOR CONTROLS LLC signed 2022-11-22 CORNELL PUMP COMPANY LLC signed 2022-11-22 DYNISCO INSTRUMENTS LLC signed 2022-11-22 HANSEN TECHNOLOGIES LLC signed 2022-11-22 METRIX INSTRUMENT CO., L.P. signed 2022-11-22 PETROLEUM ANALYZER COMPANY L.P. signed 2022-11-22 ROPER HOLDINGS, LLC signed 2022-11-22 ROPER INDUSTRIAL PRODUCTS INVESTMENT COMPANY LLC signed 2022-11-22 ROPER PUMP COMPANY LLC signed 2022-11-22 STRUERS LLC signed 2022-11-22 VIA TRAN CORPORATION signed 2022-11-22 | UBS AG, STAMFORD BRANCH, AS COLLATERAL AGENT STAMFORD, CT | 73434/453 | PASDL, file of 2026-10-15 |
| 2025-05-30 | Release of security interest Release of second lien patent security interests | ROYAL BANK OF CANADA signed 2025-05-29 | AGR INTERNATIONAL, INC. BUTLER, PA ALPHA TECHNOLOGIES SERVICES LLC HUDSON, OH AMOT CONTROLS LLC HOUSTON, TX COMPRESSOR CONTROLS LLC DES MOINES, IA CORNELL PUMP COMPANY LLC CLACKAMAS, OR DYNISCO INSTRUMENTS LLC FRANKFURT, MA HANSEN TECHNOLOGIES LLC BURR RIDGE, IL METRIX INSTRUMENT CO., L.P. HOUSTON, TX PETROLEUM ANALYZER COMPANY L.P. HOUSTON, TX ROPER HOLDINGS, LLC LAKEWOOD RANCH, FL ROPER INDUSTRIAL PRODUCTS INVESTMENT COMPANY LLC LAKEWOOD RANCH, FL ROPER PUMP COMPANY LLC COMMERCE, GA STRUERS LLC WESTLAKE, OH VIATRAN CORPORATION TONAWONDA, NY | 71476/346 | PASDL, file of 2026-10-15 |
| 2022-11-28 | Security interest Security interest Security agreement (second lien) | ALPHA TECHNOLOGIES SERVICES LLC signed 2022-11-22 AMOT CONTROLS LLC signed 2022-11-22 COMPRESSOR CONTROLS LLC signed 2022-11-22 CORNELL PUMP COMPANY LLC signed 2022-11-22 DYNISCO INSTRUMENTS LLC signed 2022-11-22 HANSEN TECHNOLOGIES LLC signed 2022-11-22 METRIX INSTRUMENT CO., L.P. signed 2022-11-22 PETROLEUM ANALYZER COMPANY L.P. signed 2022-11-22 ROPER HOLDINGS, LLC signed 2022-11-22 ROPER INDUSTRIAL PRODUCTS INVESTMENT COMPANY LLC signed 2022-11-22 ROPER PUMP COMPANY LLC signed 2022-11-22 STRUERS LLC signed 2022-11-22 VIATRAN CORPORATION signed 2022-11-22 | ROYL BANK OF CANADA, AS COLLATERAL AGENT TORONTO, ONTARIO | 62003/566 | PASDL, file of 2026-10-15 |
| 2022-11-28 | Security interest Security interest Security agreement (first lien) | ALPHA TECHNOLOGIES SERVICES LLC signed 2022-11-22 AMOT CONTROLS LLC signed 2022-11-22 COMPRESSOR CONTROLS LLC signed 2022-11-22 CORNELL PUMP COMPANY LLC signed 2022-11-22 DYNISCO INSTRUMENTS LLC signed 2022-11-22 HANSEN TECHNOLOGIES LLC signed 2022-11-22 METRIX INSTRUMENT CO., L.P. signed 2022-11-22 PETROLEUM ANALYZER COMPANY L.P. signed 2022-11-22 ROPER HOLDINGS, LLC signed 2022-11-22 ROPER INDUSTRIAL PRODUCTS INVESTMENT COMPANY LLC signed 2022-11-22 ROPER PUMP COMPANY LLC signed 2022-11-22 STRUERS LLC signed 2022-11-22 VIATRAN CORPORATION signed 2022-11-22 | UBS AG, STAMFORD BRANCH, AS COLLATERAL AGENT STAMFORD, CT | 61997/614 | PASDL, file of 2026-10-15 |
| 2022-05-31 | Name change Change of name | ROPER PUMP COMPANY signed 2022-04-28 | ROPER PUMP COMPANY, LLC WILMINGTON, DE | 60220/134 | ECORSEXC, file of 2026-09-25 |
| 2021-01-15 | Assignment Assignment of assignor's interest | BRASSELLE, TREVOR MARK signed 2021-01-13 FERGUSON, GREGORY RICHARD signed 2021-01-13 GERDES, BRIAN LEE signed 2021-01-13 REYNOLDS, CODY RICHARD signed 2021-01-13 | ROPER PUMP COMPANY COMMERCE, GA | 54933/78 | 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.