Centrifugal Pump Reliability Patents: Leaders & White Space 2026
- Flat filing activity. Filings peaked at 6 in 2020 and sat at 5 by the 2022 midpoint, with no assignee showing growth in the most recent year — this is a maintained field, not an expanding one.
- Medical-pump prior art dominates citations. The two most-cited records are implantable centrifugal blood pump patents with hybrid magnetic bearings, not industrial process-pump patents — anyone filing on bearing reliability inherits that citation base regardless of end market.
- China and the US split the filing base almost evenly. 21 China-received records against 17 US-received records, with Singapore, Europe, Australia and Canada trailing in single digits — this is not a single-jurisdiction field.
What this landscape covers
This dataset tracks patent families at the intersection of centrifugal pump design and documented reliability mechanisms — bearing reliability, seal durability, wear resistance and MTBF improvement — rather than centrifugal pumps in general. The search combines pump-specific title/abstract terms with reliability-specific claim language and the core IPC classes for non-positive-displacement pumps and measuring/testing (F04D29/04, F04D29/12, G01M13), which narrows 56 published records down to filings that actually argue a durability improvement rather than a general pump design.
The composition skews heavier than a typical mechanical-pump search: alongside the expected F16C bearing/coupling and F16J seal/gasket classes, a meaningful share of records sit in A61M and A61F — body-fluid devices and implants — because implantable centrifugal blood pumps use the same bearing and seal reliability claims as industrial pumps and were swept in by the search terms. E21B earth-drilling records reflect downhole centrifugal pump wear applications. Readers filing in industrial process pumps should expect to see, and cite around, this medical-device prior art.
Filing trend and technology composition
56 published families across the 2015–2026 window, concentrated in F04D pump claims with meaningful overlap into bearing, seal and implant classifications.
Filing trend: flat, not growing
Filings ran 5 in 2017, peaked at 6 in 2020, and stood at 5 by the 2022 midpoint — a pattern of steady, low-volume filing rather than acceleration. 2026 is a partial year and will fill in as publications catch up; treat the most recent one to two years as understated given the typical 18-month lag between filing and publication.
IPC composition: pump claims anchor a body-fluid overlap
F04D covers all 56 records by definition of the search, but F16C (shafts, bearings, couplings) and A61M (body-fluid devices) each carry 9 records, and A61F (implants) carries 6 — meaning roughly a quarter of this corpus is implantable blood pump prior art rather than industrial or process pump art. F16J (seals and gaskets) sits at 6, E21B (wells) at 6, and F04B (positive-displacement pumps) and B29D (plastic articles) trail with 3 and 2 respectively.
Shares are the percentage of the 56 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Go deeper on Centrifugal Pump Reliability and Durability with Eureka
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Try EurekaThe most-cited prior art in this space
US10781828B2 — Centrifugal pump with noise dampening rubber isolation impeller bushing
A rotary assembly for a centrifugal pump includes a housing, an impeller, a first opening formed in one of the housing or the impeller, a first bushing disposed in the first opening, and a first shaft projection projecting axially from one of the housing or the impeller. The first bushing extends annularly around a central opening thereof and is formed from an elastomeric material. The first shaft projection is received within the central opening of the first bushing, with one of the two components configured to rotate relative to the other during operation.Filed by HANON SYSTEMS, published 2020-09-22 — an automotive-grade approach to bearing wear reduction via elastomeric isolation rather than magnetic or hydrodynamic bearings.
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US7462019B1 | Implantable centrifugal blood pump with hybrid magnetic bearings | 160 |
| 2 | WO1999053974A2 | Implantable centrifugal blood pump with hybrid magnetic bearings | 83 |
| 3 | US3664760A | Centrifugal pump | 35 |
| 4 | US20170363103A1 | Centrifugal pumps for medical uses | 29 |
| 5 | CN104454555A | 一种耐腐耐磨化工离心泵 | 14 |
| 6 | US4737072A | Centrifugal pump | 9 |
| 7 | US10377097B2 | Centrifugal pumps for medical uses | 7 |
| 8 | CN103953552A | 一种阴离子交换器给水泵 | 6 |
| 9 | US20220341435A1 | Bearings for electric submersible pumps | 5 |
| 10 | US10781828B2 | Centrifugal pump with noise dampening rubber isolation impeller bushing | 3 |
Citation counts reflect a searched corpus skewed toward older filings; treat them as markers of influence on later drafting, not as a measure of current commercial relevance.
Patent titles are shown in the language they were filed in, not translated, so that each record stays verifiable against the original filing — a translated title will not match in Eureka or in any national register. Each row carries its publication number; clicking a row searches Eureka by that number.
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Three patterns stand out once family counts, citations and jurisdictions are read together.
Medical bearing art sets the baseline
The two most-cited records in this corpus are implantable centrifugal blood pump patents built on hybrid magnetic bearings. Any bearing-reliability claim filed today, in any pump application, is likely to be examined against this prior art, since it is the densest citation cluster in the field.
A mature, low-volume field
Filing counts have not moved much across the window and no assignee shows momentum in the latest tracked year. This suggests the core reliability mechanisms — bearing life, seal wear, MTBF testing — are already well-covered by existing claims, and new filings need to differentiate on a specific mechanism rather than the broad concept.
No single dominant filing venue
China and the United States each account for a substantial share of records, with Singapore, Europe, Australia and Canada trailing in single digits. A durability claim aimed at global coverage needs to clear prior art in both major offices rather than assuming one is dispositive.
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to centrifugal pump reliability and durability, with the prior art for and against each one.
Who holds this ground
Filing activity is spread across industrial pump manufacturers, oilfield services firms and academic co-filers, with several assignees working together on shared bearing and durability research rather than filing solo.
Academic-industrial partnerships anchor the durability research
The strongest co-assignee pairing links an industrial products company with a university, and a second university appears in overlapping pairs with both — a three-way research relationship rather than isolated collaborations. This points to sponsored bearing or seal durability research rather than opportunistic joint filing.
No assignee is currently accelerating
Every assignee tracked for recent-year momentum, including established pump and oilfield-services firms, shows zero filings in the latest year. Combined with the flat overall trend, this reads as a settled patent position rather than an active filing race — useful context before assuming a competitor is about to move.
China-based niche pump makers form a long tail
Beyond the larger industrial and academic names, a long tail of China-based single- or few-filing pump manufacturers appears in the ranking, largely in corrosion- and wear-resistant process pump claims rather than bearing or seal mechanisms.
| Assignee | Recent year | YoY |
|---|---|---|
| Alfa Laval Corporate AB | 0 | — |
| MedQuest Products, Inc. | 0 | — |
| University of Utah | 0 | — |
| Sulzer Management AG | 0 | — |
| Schlumberger Technology Corporation | 0 | — |
| University of Virginia | 0 | — |
| Nidec GPM GmbH | 0 | — |
| Shaanxi University of Science & Technology | 0 | — |
Where to take this analysis
This landscape shows what has been filed; the next step is testing a specific claim idea against it.
Map a bearing or seal claim against this prior art
Run a candidate claim through the full family set rather than just the most-cited records, since the flat filing trend means older art can still be live and enforceable.
Explore in Patsnap EurekaTrack the academic-industrial co-filing pattern
The strongest co-assignee pairs suggest sponsored research programmes; watching their continuations is a lower-cost way to anticipate the next filing wave than monitoring the market broadly.
Explore in Patsnap EurekaCommon questions about this landscape
The ranking in this dataset is spread across industrial pump manufacturers, oilfield-services firms and university co-filers rather than concentrated in a single company. The strongest filing relationships are academic-industrial pairs, with one industrial assignee and two universities appearing together across multiple shared families. No single assignee shows filing momentum in the most recent tracked year, which suggests the current holders are maintaining rather than expanding their positions.
Implantable centrifugal blood pumps use hybrid magnetic bearings and rely on the same bearing-life and durability claim language as industrial centrifugal pumps, so they fall inside a reliability-focused search even though the end application is medical. The two most-cited records in this corpus are both implantable blood pump patents, meaning they form part of the prior art baseline that any new bearing-reliability claim, industrial or medical, will be examined against.
Not based on this dataset. Filings ran at 5 in 2017, peaked at 6 in 2020, and were back to 5 by the 2022 midpoint, with the most recent tracked year showing zero momentum across every assignee monitored. Recent years will fill in somewhat as publications catch up with the typical 18-month filing-to-publication lag, but the multi-year pattern is flat rather than accelerating.
Coverage is thinner in a few specific branches: elastomeric bushing-based wear isolation as an alternative to magnetic or hydrodynamic bearings, MTBF test methodology claims under G01M13 rather than mechanism claims, downhole centrifugal pump seal wear where E21B and F04D overlap, and adaptation of hybrid magnetic bearing designs from medical pumps into industrial process pumps. These are read from thinner claim density relative to the core bearing and seal categories, not from an absence of any related art.
China and the United States are the two leading receiving offices in this dataset, with 21 and 17 records respectively, and together they account for most of the corpus. Singapore, the European Patent Office, Australia and Canada each contribute only a handful of records. A filing strategy aimed at broad commercial coverage should prioritise clearing prior art in both China and the US rather than treating either as sufficient on its own.
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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.