Patents
US 12318837 B2: Investment casting process for hollow components
- Granted
- 2025-06-03
- Filed
- 2016-02-23 application 15050503
- Type
- Utility · 19 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
An investment casting process for a hollow component such as a gas turbine blade utilizing a ceramic core (10) that is cast in a flexible mold (24) using a low pressure, vibration assisted casting process. The flexible mold is cast from a master tool (14) machined from soft metal using a relatively low precision machining process, with relatively higher precision surfaces being defined by a precision formed insert (22) incorporated into the master tool. A plurality of identical flexible molds may be formed from a single master tool in order to permit the production of ceramic cores at a desired rate with a desired degree of part-to-part precision.
Source: PVGPATDIS, file of 2026-04-10 (ipg250603.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| SIEMENS ENERGY, INC. 1,177 patents | US company or organization | Orlando, FL | PVGPATDIS, file of 2026-04-10 | |
| RAYTHEON TECHNOLOGIES CORPORATION 2,504 patents | US company or organization | Waltham, MA | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Gary B. Merrill | Orlando, FL | 51 | PVGPATDIS, file of 2026-04-10 | |
| Andrew J. Burns | Longwood, FL | 16 | PVGPATDIS, file of 2026-04-10 | |
| Michael P. Appleby | Crozet, VA | 22 | PVGPATDIS, file of 2026-04-10 | |
| Iain Fraser | Ruckersville, VA | 23 | PVGPATDIS, file of 2026-04-10 | |
| John R. Paulus | Afton, VA | 24 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| B22C | Foundry moulding | B22C9/101 | 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 |
|---|---|---|---|---|---|
| 2023-07-27 | Name change Change of name | RAYTHEON TECHNOLOGIES CORPORATION signed 2023-07-14 | RTX CORPORATION FARMINGTON, CT | 64402/837 | PASDL, file of 2026-10-15 |
| 2020-12-22 | Name change Change of name | UNITED TECHNOLOGIES CORPORATION signed 2020-04-03 | RAYTHEON TECHNOLOGIES CORPORATION FARMINGTON, CT | 54825/788 | ECORSEXC, file of 2026-09-25 |
| 2020-09-30 | Assignment Assignment of assignor's interest | BURNS, ANDREW J. signed 2011-09-01 MERRILL, GARY B. signed 2011-09-02 | SIEMENS ENERGY, INC. ORLANDO, FL | 53935/411 | ECORSEXC, file of 2026-09-25 |
| 2018-06-28 | Assignment Assignment of assignor's interest | MIKRO SYSTEMS, INC. signed 2018-06-18 | UNITED TECHNOLOGIES CORPORATION FARMINGTON, CT | 46232/716 | ECORSEXC, file of 2026-09-25 |
| 2018-01-25 | Assignment Assignment of assignor's interest | FRASER, IAIN A. signed 2011-09-19 PAULUS, JOHN R. signed 2011-09-19 APPLEBY, MICHAEL signed 2011-09-20 | MIKRO SYSTEMS, INC. CHARLOTTESVILLE, VA | 44725/31 | 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.