Patents
US 12704137 B2: Hydraulic cylinder monitoring
- Granted
- 2026-08-11
- Filed
- 2025-01-27 application 19038410
- Type
- Utility · 20 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A refuse collection vehicle has various hydraulic actuators including at least one cylinder with an internal seal. A sensor is responsive to movement of the piston and sends a signal to a controller to indicate piston movement information during an associated vehicle body component movement. The controller is configured to determine a motion characteristic of the piston during a predetermined body component movement, compare the determined motion characteristic to a stored reference motion characteristic, and in response to determining that a difference between the determined motion characteristic and the reference motion characteristic is greater than a predetermined value, trigger an indication that the refuse collection vehicle is in need of service.
Source: PTBLXML, file of 2026-08-11 (ipgb20260811.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| The Heil Co. 129 patents | US company or organization | Chattanooga, TN | PTBLXML, file of 2026-08-11 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| John Forrest Smith | Fort Payne, AL | 26 | PTBLXML, file of 2026-08-11 | |
| Alejandro de Leon | Fort Payne, AL | 2 | PTBLXML, file of 2026-08-11 | |
| Garrett Eckerl | Fort Payne, AL | 4 | PTBLXML, file of 2026-08-11 | |
| Albert Xiaoxia Jiang | Chattanooga, TN | 10 | PTBLXML, file of 2026-08-11 | |
| Thomas Leon Wilding | Willard, UT | 6 | PTBLXML, file of 2026-08-11 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| F15B | Systems acting by means of fluids in general; fluid-pressure actuators, e.g. servomotors; details of fluid-pressure systems, not otherwise provided for | F15B15/2838 | PTBLXML, file of 2026-08-11 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2025-02-19 | Assignment Assignment of assignor's interest | SMITH, JOHN FORREST signed 2021-02-22 DE LEON, ALEJANDRO signed 2021-02-09 ECKERL, GARRETT signed 2021-02-03 JIANG, ALBERT XIAOXIA signed 2021-03-16 WILDING, THOMAS LEON signed 2021-03-14 | THE HEIL CO. CHATTANOOGA, TN | 70265/973 | PASDL, file of 2026-08-13 |
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.