Valve Actuator Patents: Leaders, Trends & White Space 2026
- 21.5% concentration at the top. The five leading filers hold 886 of 4,117 records in scope, but a long tail of 95 further ranked companies still accounts for most of the field.
- Filing has pulled back from its 2018 peak. Volume ran from 197 records at peak down through a documented -44% move between 2021 (172) and 2024 (96), the last year treated as complete given publication lag.
- Valves and fluid actuators dominate the classification mix. F16K and F15B together tag well over a third of all records, while control-system classes like G05B and G05D sit far behind — a gap worth checking before filing.
Filing growth compares 2021 (172 records) with 2024 (96) — a three-year span. 2024 is the most recent year we treat as complete: publication lags filing by roughly 18 months, so 2025 onwards are still filling in and any growth rate that ends there would understate the field. Top-5 share is the combined record count of the five largest assignees divided by all 4,117 records in scope (CR5), not by the ranked leaders only.
What this patent set covers
This landscape tracks 4,117 published records filed against valve actuator hardware and partial stroke testing methods — spring-return and scotch-yoke actuator mechanics, fail-safe positioning, positioner calibration, declutch override arrangements, and stroke-time measurement. The scope spans industrial process valves, HVAC damper actuation, and medical fluid-pump actuation, which is why classes as different as F16K (valves and taps) and A61M (devices for body fluids) both register meaningfully in the composition data.
Filing offices skew heavily toward the United States, with the EPO, WIPO's PCT route, the UK, Canada and Australia forming a second tier. That distribution points to a field where US prosecution strategy sets the pace, but where PCT filings are common enough that regional divergence in claim scope is worth checking before committing to a jurisdiction.
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Filing trends and technology composition
Two views of the same 4,117 records: how filing volume has moved year over year, and which IPC subclasses carry the claim density.
Filing trend, 2017–2026
Volume ran from 94 records in 2017 to a peak of 197 in 2018, then eased toward 8 in 2026 — a figure still filling in given the roughly 18-month lag between filing and publication. The cleanest recent read is the 2021-to-2024 span, where filings moved from 172 to 96, a documented -44% change; treat any year after 2024 as provisional rather than a sign of a continued decline.
Technology composition by IPC subclass
F16K (valves and taps) leads at 26.2% of all records, with F15B (fluid-pressure actuators) at 13.2%. A61M (body-fluid devices) at 9.4% reflects the medical infusion-pump side of this search string rather than industrial process valves. Control-oriented classes — G05B at 6.9% and G05D at 4.3% — trail well behind the mechanical actuator classes, and E21B (wellbore drilling) and F24F (HVAC) each sit in the mid single digits. Because records can carry multiple IPC codes, these shares add to more than 100% of the 4,117-record base.
Shares are the percentage of the 4,117 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Valve Actuators and Partial Stroke Testing with Eureka
This page is one run against one query. Ask Eureka your own question about valve actuators and partial stroke testing and every answer comes back with the patent numbers behind it.
Try EurekaA representative claim in this space
WO2019048850A1 — Partial stroke test for a pneumatic valve actuator
The actuator comprises an actuation piston housed between two fluid chambers, each fed by its own fluid control valve, with a controller coordinating both valves to drive the piston to a commanded position. The arrangement is built around positional control rather than a fixed open/closed state, which is the structural basis for running a partial stroke test without taking the valve fully off its process position.Filed by Bifold Fluidpower Limited, published 2019-03-14.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US4530357A | Fluid actuated orthopedic tool | 1,062 |
| 2 | US9641122B2 | HVAC actuator with automatic end stop recalibration | 956 |
| 3 | US6814547B2 | Medical fluid pump | 660 |
| 4 | US7238164B2 | Systems, methods and apparatuses for pumping cassette-based therapies | 498 |
| 5 | US20040019313A1 | Systems, methods and apparatuses for pumping cassette-based therapies | 480 |
| 6 | US20120029661A1 | Dynamic User Interface for Configuring and Managing a Process Control System | 474 |
| 7 | US9909492B2 | Opposed piston internal combustion engine with inviscid layer sealing | 465 |
| 8 | US20080015493A1 | Medical fluid pumping system having real time volume determination | 383 |
| 9 | US5197328A | Diagnostic apparatus and method for fluid control valves | 374 |
| 10 | US20030217962A1 | Medical fluid pump | 349 |
Citation counts favour older filings simply because they have had more time to accumulate citations within this corpus — read them as a signal of influence on later work, not as a ranking of current relevance.
Each row carries its publication number; clicking a row searches Eureka by that number.
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Browse MCP servers →What the concentration and trend numbers mean for filing strategy
Three figures matter more than the rest for anyone deciding where to file next: how concentrated the leaders are, how the volume curve has actually moved, and which classification gap is least defended.
Leadership is present but not dominant
The five leading filers combine for 886 of the 4,117 records in scope — meaningful, but well short of a lockout. With 95 more ranked companies behind them, the field still has room for a new entrant to build a defensible position rather than license around an incumbent.
Volume has cooled from its 2018 peak
Filing peaked at 197 records in 2018 and has moved down since, with the cleanest recent comparison — 2021 to 2024 — showing a documented -44% change. Years after 2024 are still filling in due to publication lag and should not be read as a continuation of the drop.
Control-logic claims trail mechanical actuator claims
F16K and F15B together tag well over a third of all records, but G05B and G05D — the control and regulating classes that would cover calibration algorithms and stroke-time analytics — sit under 7% each. That gap is where software-adjacent claims around positioner calibration and diagnostics look less crowded than the mechanical actuator space.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to valve actuators and partial stroke testing, with the prior art for and against each one.
Leaders, momentum, and the under-claimed branches
The ranked leaders hold a real but non-dominant share of the field, and recent-year momentum data shows even the largest filers have gone quiet in the latest year — which changes how a competitive-intelligence read should weight last year's activity.
A concentrated but not closed top tier
The leading filer alone accounts for 329 records, with the fifth-ranked company at 85 and the tenth at 44 — a steep drop-off that signals a genuine leader followed by a long, thinner tail rather than a tight oligopoly.
Corporate-family co-filing is common at the top
The strongest co-assignee pairing in this dataset links two entities from the same corporate group at 197 shared records, with a second pairing at 34 — a reminder to check corporate-family structure before treating two assignee names as independent competitors.
Latest-year activity has gone quiet across the board
Most of the historically active assignees show zero filings in the latest year, and the one filer still active is down sharply year over year. Given the roughly 18-month publication lag, this is more likely an artefact of incomplete recent data than a genuine stop in R&D.
| Assignee | Recent year | YoY |
|---|---|---|
| PRAMANA INC | 1 | -90% |
| Fisher Controls International LLC | 0 | — |
| Baxter International Inc. | 0 | — |
| Baxter Healthcare SA | 0 | — |
| Tyco Fire & Security GmbH | 0 | — |
| Fisher-Rosemount Systems Inc. | 0 | — |
| Nordson Corporation | 0 | — |
| Nova Tech Engineering Inc. | 0 | -100% |
Turning this landscape into a filing decision
The dataset shows where claim density sits today; the next step is testing a specific claim idea against it.
Map a draft claim against the crowded classes
Before drafting around spring-return or scotch-yoke mechanics, check how a proposed claim reads against the F16K and F15B density already documented here.
Explore claim mapping in EurekaTrack the quiet leaders
Several of the largest historical filers show zero activity in the latest year. Confirm whether that is a genuine pause or a publication-lag artefact before deciding whether a space is actually open.
Set up assignee monitoring in EurekaTest white space in control-logic classes
G05B and G05D trail the mechanical actuator classes by a wide margin. Run a freedom-to-operate check on calibration and diagnostic claims specifically, rather than assuming the whole field is crowded.
Run a white space search in EurekaCommon questions about valve actuator patents
The dataset ranks 100 companies by patent family count, with the leading filer holding 329 of the 4,117 records in scope and the fifth-ranked company at 85. That leaves a long tail: the tenth-ranked company holds 44, and the remaining 90 ranked companies split the rest. This is a field with a genuine leader but no single company close to a lockout, so a new entrant's freedom-to-operate analysis needs to look well past the top five names.
Filing peaked at 197 records in 2018 and has since declined, with the most reliable recent comparison — 2021's 172 records against 2024's 96 — showing a documented -44% change. Figures from 2025 and 2026 are still incomplete because patent publication typically lags filing by around 18 months, so those years understate real activity and should not be read as proof the decline is continuing. Anyone tracking this trend should revisit the 2025-2026 figures again in a year or two once they have filled in.
A partial stroke test moves a valve actuator a small, controlled distance from its resting position and back, verifying the actuator and its fail-safe mechanism will move on demand without taking the valve fully off its process position. It matters in safety-critical process installations where a valve may sit unmoved for years and needs periodic proof it will still stroke to its fail-safe position in an emergency. The representative record in this dataset, WO2019048850A1, is built around exactly this capability, using independently controlled fluid chambers on either side of the actuation piston to support tested partial movement.
Classification density is heavily weighted toward mechanical actuator hardware: F16K (valves and taps) and F15B (fluid-pressure actuators) together tag well over a third of the 4,117 records. Control and regulation classes — G05B and G05D — sit far lower, each under 7% of records, which suggests calibration algorithms, stroke-time diagnostics, and positioner software claims are comparatively thin on the ground relative to the mechanical actuator space. That gap is a reasonable starting point for a freedom-to-operate check rather than a guaranteed opening, since thin IPC coverage does not rule out claims filed under adjacent classifications.
Yes, and that breadth is visible directly in the classification data: F16K and F15B reflect industrial process-valve and fluid-actuator hardware, while A61M at 9.4% of records reflects medical fluid-pump and infusion-device actuation using overlapping mechanical principles. E21B (wellbore drilling) and F24F (HVAC and ventilation) add further application-specific slices. Anyone searching this space for competitive intelligence should filter by application class carefully, since a single search string can otherwise mix industrial process control art with medical device art that rarely cites the other.
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Disclaimer. This page is generated from Patsnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing on this page constitutes an exhaustive prior-art, novelty, freedom-to-operate, or validity search, nor does it constitute legal, financial, investment, or professional advice, and it should not be relied upon as such. Any patent, commercial, or strategic decision should be verified independently and reviewed with qualified patent, legal, and domain professionals. Patsnap makes no warranties, express or implied, as to the accuracy, completeness, or fitness for any particular purpose of the information presented.
Machine translation. Assignee and organisation names originally recorded in Chinese, Japanese or Korean have been rendered into English by an AI translation step so that the tables stay readable. These renderings are best-effort and may not match a company’s registered English name; the original name is what the underlying patent record carries, and it is what any Eureka query launched from this page uses.