Patents
US 8267640 B1: Turbine pump with floating raceway
- Granted
- 2012-09-18
- Filed
- 2009-05-27 application 12472794
- Type
- Utility · 17 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A turbine pump that permits an impeller to stay compliant with a raceway by the use of a preloaded floating raceway that operates by utilizing fluid floating on both side of the raceway within the pump. Exemplary embodiments of the pump include a mounting frame that is adapted to engage the pump to a drive source; an end frame that is adapted to attach to the mounting frame and includes an inlet section and an outlet section that facilitate fluid flow entering and exiting the pump; a motor shaft enclosed within the mounting frame; a floating raceway that is situated within the end frame and positioned around the distal end of the motor shaft, and includes an inlet passage, an outlet passage and a bypass hole fixed relative to the position of the inlet passage and the outlet passage; a spring located at the top of the floating raceway and at least partially contained within a corresponding cavity located in the end frame that is preloaded to help maintain a desired clearance between the floating raceway and the impeller; and an impeller secured to an distal end of the motor shaft.
Source: PVGPATDIS, file of 2026-04-10 (ipg120918.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Crane Pumps & Systems, Inc. 7 patents | US company or organization | Piqua, OH | CRANE PUMPS & SYSTEMS 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 |
|---|---|---|---|---|
| Chih-Min Lin | Tipp City, OH | 29 | PVGPATDIS, file of 2026-04-10 | |
| William J. Watkins | Vandalia, OH | 5 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| F04D | Non-positive-displacement pumps | F04D13/08 | 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 |
|---|---|---|---|---|---|
| 2022-01-10 | Assignment Assignment of assignor's interest | CRANE PUMPS & SYSTEMS, INC. signed 2021-12-15 | CRANE PUMPS & SYSTEMS PFT CORP. PIQUA, OH | 58610/577 | ECORSEXC, file of 2026-09-25 |
| 2009-08-10 | Assignment Assignment of assignor's interest | LIN, CHIH signed 2009-08-06 WATKINS, WILLIAM J. signed 2009-08-06 | CRANE PUMPS & SYSTEMS, INC. PIQUA, OH | 23072/435 | 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.