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Run your analysis now →https://www.patsnap.com/resources/blog/rd-blog/railway-bogie-braking-system-patent-landscape/ · Patsnap · data cut-off 2026-07-31 · downloaded from the live page
Rail & Transit Patent LandscapeRailway Bogie Braking System Patents: Who Is Filing, and Where the Claim Space Is Still Open
- 450 families since 2015, with filings peaking at 16 in 2017 and momentum still building toward the most recent partial year.
- China leads receiving offices with 81 filings, ahead of Russia (51) and the European Patent Office (49), with Canada and the UK close behind at 31 each.
- Only ten co-assignee pairs exist in the whole dataset, and the strongest links single inventors to specific corporate filers rather than showing broad cross-company collaboration.
450
Published Records
30%
Top-5 Share of All Records
-73%
Filing Growth 2021→2024
CN
Leading Jurisdiction
Filing growth compares 2021 (11 records) with 2024 (3) — 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 450 records in scope (CR5), not by the ranked leaders only.
Published byPatsnap Research··8 min readSourced from Patsnap Eureka
Overview
What the bogie brake patent record shows
Railway bogie braking covers the hardware that converts a stop command into retarding force at the wheel: brake beams, calipers, tread and disc units, slack adjusters, and the rigging that links them to a bogie frame. The search underlying this page combines bogie- and brake-specific terms in the title and claims with IPC codes for railway brakes (B61H), general clutch and brake mechanisms (F16D), and running gear (B61F), which keeps the corpus focused on braking hardware rather than train control or signalling.
Filing activity has been accelerating rather than settling into a steady state: the trend from 2017 through the midpoint year of 2022 shows growth still building, not tapering. Because publication typically lags filing by around 18 months, the most recent one or two years in any such trend will always look thinner than they eventually turn out to be once late filings publish.
Annual filings, 2015–2026 (partial)
Source: Patsnap Eureka. Assignee ranking and totals. Derived from a Patsnap search on Railway Bogie Braking System covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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Filing Data
Filing trend and technology composition
Two views of the same 450-family dataset: how filing volume has moved year over year, and how those filings distribute across the IPC subclasses that touch bogie braking hardware.
Filings accelerating off a 2017 peak
Annual filings rose to 16 in 2017, then eased before the midpoint year of 2022 registered just 1 — a trough rather than a plateau — with activity building back up toward the most recent (partial) year at 3. Read the tail end of the curve as a floor, not a ceiling, given publication lag.
B61H dominates; F16D and B61F carry the secondary load
433 of 450 records touch B61H (railway brakes) directly, confirming the search is on-target. F16D (101, general clutch/brake mechanisms) and B61F (85, running gear and bogies) are the largest secondary subclasses, meaning most filers are either adapting general brake mechanisms into a rail context or filing brake claims alongside bogie structural claims. B60T (67), B61C (12), B61D (7) and the smaller B63H (5) and B61K (4) counts mark thinner, more peripheral activity.
Shares are the percentage of the 450 records in scope. A patent can carry several IPC classes, so the shares add up to more than 100%.
Source: Patsnap Eureka. Filing trend and technology composition. Derived from a Patsnap search on Railway Bogie Braking System covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.
Go deeper on Railway Bogie Braking System with Eureka
This page is one run against one query. Ask Eureka your own question about railway bogie braking system and every answer comes back with the patent numbers behind it.
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Representative and most-cited filings
Representative Filing
US9283971B2 — Integrated bogie brake and slack adjuster
WABTEC MZT
The invention relates to an integrated bogie brake including a brake beam, a brake cylinder, slack adjusters, levers, and brake shoe holders and having suspension links in order to be hanged under a bogie. In order to provide a device with a significantly lower weight and simpler design with the same and better braking characteristics compared to known types of bogie brake systems, the integrated bogie brake according to the invention needs only one single brake beam and the slack adjusters are aligned with the wheels of the bogie.Filed by WABTEC MZT and published 2016-03-15, this filing is a useful reference point precisely because it claims a specific structural simplification — a single brake beam with wheel-aligned slack adjusters — rather than a braking method in the abstract.
Most-cited records in the corpus
| # | Publication no. | Patent title | Citations |
|---|---|---|---|
| 1 | US4817536A | Rail bogie for convertible rail-highway vehicle | 44 |
| 2 | US4781273A | Disc brake caliper support structure | 34 |
| 3 | CN201694065U | 一种用于城轨车辆的集中救援缓解系统 | 31 |
| 4 | WO2000002756A1 | A bogie brake | 23 |
| 5 | GB786090A | Improvements in or relating to disc brakes for railway vehicles | 20 |
| 6 | CN101412402A | 一种三轴转向架基础制动装置及三轴转向架 | 19 |
| 7 | GB2456526A | Rail trolley | 19 |
| 8 | US6551003B1 | Joint for pivotally joining a brake head to a brake beam | 19 |
| 9 | CN107023593A | 一种高速列车用全盘式制动器 | 18 |
| 10 | CN206691128U | 一种装用可调节单元制动装置的变轨距转向架 | 17 |
Citation counts inside a searched corpus skew toward older filings simply because they have had longer to accumulate citations — treat this table as a signal of historical influence, not of which claims matter most today.
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.
Source: Patsnap Eureka. Citation counts and representative records. Derived from a Patsnap search on Railway Bogie Braking System covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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What the numbers mean for a filing decision
Three read-outs from the assignee, geography and citation data that matter more for strategy than the raw counts do on their own.
Filing Trend
16 → 3
peak year (2017) vs. most recent year
Growth is uneven, not declining
A 2017 peak of 16 filings followed by a trough of 1 at the 2022 midpoint, then renewed climbing, does not describe a maturing field settling down. It describes a technology area that periodically resets around new mechanical concepts. Treat any dip as inconclusive until the following 18 months of publications land.
Filing trend, 2015–2026
Geographic Filing
81 (CN) vs. 51 (RU) vs. 49 (EP)
top three receiving offices
China leads, but filing is genuinely multi-jurisdictional
No single office accounts for even a fifth of total filings. Russia and the European Patent Office are close behind China, and Canada and the UK each carry 31 — a spread that suggests rolling stock manufacturers are filing wherever they have active rail programmes rather than concentrating in one home market.
Receiving office counts
Collaboration Density
10 co-assignee pairs
across 450 families
Filing here is largely solo, not consortium-driven
Only ten co-assignee pairs exist across the whole corpus, and the strongest of them link a single named inventor to one corporate filer rather than showing two companies jointly claiming. That points to in-house engineering teams as the primary source of these filings, not joint ventures or supplier consortia.
Co-assignee pair analysis
Eureka AI Agent
Looking for what nobody has claimed yet?
Eureka can read the same corpus for gaps instead of for coverage: under-claimed branches adjacent to railway bogie braking system, with the prior art for and against each one.
Source: Patsnap Eureka. Co-assignee relationships and derived observations. Derived from a Patsnap search on Railway Bogie Braking System covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
Players
Who is filing, and where they are pulling back
Recent-year momentum is thin across the board: none of the tracked assignees shows more than a single filing in the most recent year, which is consistent with publication lag rather than a genuine slowdown in R&D.
Momentum Leader
1 filing
latest year
CRRC Zhuzhou Electric Locomotive Co., Ltd. is the only assignee still filing in the latest year
Among the tracked assignees, CRRC Zhuzhou Electric Locomotive Co., Ltd. (CRRC Zhuzhou Electric Locomotive) is the sole name registering activity in the most recent year, with the rest showing zero. That single data point should be read cautiously given publication lag, but it is the only visible forward signal in the momentum table.
Recent-year filing count
Collaboration Pattern
4 shared filings
strongest co-assignee pair
Sabwabco and inventor EMILSSON FRED form the densest pairing
The strongest co-assignee link in the dataset — four shared filings between Sabwabco (Saab-affiliated / Sabwabco-style entity) and named inventor EMILSSON FRED — is still smaller than a typical joint-venture filing pattern, reinforcing that this field runs on individual inventor-to-employer relationships rather than cross-company R&D pacts.
Co-assignee pair strength
Historical Anchor
44 citations
most-cited record
US4817536A anchors the citation graph but predates the current filing wave
The most-cited record in the corpus, US4817536A on a convertible rail-highway bogie, sits well outside the 2015–2026 filing window this landscape tracks. Its citation count reflects decades of accumulated references, not current relevance — newer filings simply have not had time to catch up on citation count.
Most-cited record
Recent-year filing momentum by assignee
| Assignee | Recent year | YoY |
|---|---|---|
| CRRC Zhuzhou Electric Locomotive Co., Ltd. | 1 | — |
| Sabwabco | 0 | — |
| Knorr-Bremse Rail Vehicle Systems Co., Ltd. | 0 | — |
| Faiveley Transport Nordic AB | 0 | — |
| Knorr GmbH | 0 | — |
| WABTEC MZT | 0 | — |
| Wabtec Holding Corp. | 0 | — |
| MOSKOVSKIJ GOSUDARSTVENNYJ UNIV PUTEJ SOOBSHCHENIJA | 0 | — |
Source: Patsnap Eureka. Assignee-level momentum. Derived from a Patsnap search on Railway Bogie Braking System covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
What's Next
Where to take this next
The landscape above is a starting point for freedom-to-operate and whitespace work, not a substitute for claim-level review.
Run a claim-level check on the under-claimed branches
The gate chips above point to IPC overlaps with thin record counts. Before drafting around them, pull the actual claim language on the handful of records that sit there.
Explore in EurekaTrack the momentum leader's filing history
A single assignee shows recent-year activity while the rest show none. Understanding what that assignee has filed in the preceding several years clarifies whether this is a new push or a continuation of existing work.
Explore in EurekaRe-run the trend once the latest year fully publishes
Publication lag means the last one to two years understate true filing volume. Revisiting the trend line in 12–18 months will sharpen the read on whether growth is genuinely accelerating.
Explore in EurekaSource: Patsnap Eureka. Forward-looking reading of the same dataset. Derived from a Patsnap search on Railway Bogie Braking System covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
FAQ
Common questions on bogie brake patents
This dataset identifies 450 patent families published between 2015 and mid-2026 that combine bogie- or rail-truck-specific language with brake-related claims, filtered to the IPC subclasses covering railway brakes, clutch/brake mechanisms and running gear. That count reflects one search construction and one time window, so it should be treated as a bounded sample rather than an exhaustive total of every filing that touches bogie brakes. Different keyword or IPC choices would shift the number, though the underlying trend — an accelerating filing pattern since 2017 — is likely to hold across reasonable variations.
The corpus does not show a single dominant filer; instead, activity spreads across several rolling-stock and brake-system manufacturers, several of which appear in the co-assignee and momentum tables on this page. Only CRRC Zhuzhou Electric Locomotive Co., Ltd. (CRRC Zhuzhou Electric Locomotive) shows filing activity in the most recent tracked year, though that is likely a publication-lag artefact rather than the others having stopped filing. A practitioner should treat the ranking table on this page, not this summary, as the source for specific company-by-company standing.
US9283971B2, assigned to WABTEC MZT and published in March 2016, claims an integrated bogie brake that uses a single brake beam with slack adjusters aligned to the wheels — a structural simplification aimed at reducing weight and part count versus prior multi-beam designs. It does not claim braking methods generally, disc or tread brake friction materials, or bogie structural design outside this specific beam-and-adjuster arrangement. Anyone designing a bogie brake assembly should read its independent claims directly rather than relying on the abstract, since the scope turns on the single-beam, wheel-aligned-adjuster combination specifically.
The IPC composition shows heavy concentration in B61H (433 of 450 records) with much thinner representation in adjacent subclasses like B61D (railway vehicle bodies, 7 records), B61C (locomotives, 12 records) and B63H (marine propulsion, 5 records). Those thinner subclasses mark areas where fewer filers have staked structural claims — for example, brake shoe holders integrated into railcar body structure, or slack adjuster alignment specific to locomotive bogies. A freedom-to-operate review focused on those overlaps is more likely to find open claim space than a search centred on core B61H tread or disc brake mechanisms, where filing density is highest.
The trend data shows a trough of 1 filing at the 2022 midpoint sandwiched between a 2017 peak of 16 and renewed climbing toward the most recent year. Because patent publication lags filing by roughly 18 months, some of that apparent 2022 dip is likely an artefact of records that were filed but had not yet published at the time this dataset was compiled. It would be premature to read the trough as a genuine slowdown in R&D activity without revisiting the same trend line after another filing cycle has had time to publish.
Answers are grounded in the same dataset. Derived from a Patsnap search on Railway Bogie Braking System covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish.Run this in Eureka MCP
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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.