patentgrep
SearchCompaniesTechnologiesAPIPricingDocs
DocsGet an API key
  1. Technology classes
  2. /F · Mechanical engineering
  3. /F04 · Positive - displacement machines for liquids
  4. /F04B · Positive-displacement machines for liquids
  5. /F04B 27/00 · Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or
  6. /F04B 27/04 · Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or
  7. /F04B 27/047 · With an actuating element at the outer ends of the cylinders
  8. /F04B 27/0472
F04B 27/0472

With cam-actuated distribution members

Official title: {with cam-actuated distribution members}

F04B27/0472 (With cam-actuated distribution members) appears on 4 US grants and 3 published applications in this corpus.

Search patents in F04B

Where it sits

  1. FMechanical engineering
  2. F04Positive - displacement machines for liquids
  3. F04BPositive-displacement machines for liquids
  4. F04B 27/00Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or
  5. F04B 27/04Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or
  6. F04B 27/047With an actuating element at the outer ends of the cylinders
  7. F04B 27/0472With cam-actuated distribution members
Granted patents
4
Published applications
3
Assignees
2
Inventors
6
Latest grant
24 Mar 2020

Filings by year

Granted patentsPublished applications
F04B 27/0472: granted patents and published applications per publication year
YearGranted patentsPublished applications
200010
200100
200200
200300
200400
200500
200600
200700
200800
200901
201000
201100
201211
201300
201410
201500
201600
201701
201800
201900
202010

200020102020

By publication year. Applications have been published since 2001.

Recent patents

  • Engine compressor unit24 Mar 2020US 10,598,168 B2
  • Rotating and reciprocating piston device12 Aug 2014US 8,800,501 B2
  • Air discharging apparatus and image forming apparatus20 Mar 2012US 8,139,973 B2Ricoh Company, Ltd.
  • Zero leakage valveless positive fluid displacement device19 Dec 2000US 6,162,030 AEncyNova International, Inc.
  • Engine Compressor Unit7 Sep 2017US 2017/0254320 A1
  • Rotating and reciprocating piston device26 Jan 2012US 2012/0020823 A1
  • Air discharging apparatus and image forming apparatus5 Nov 2009US 2009/0274493 A1Ricoh Company, Ltd.

Most cited

By later US patents
  • Zero leakage valveless positive fluid displacement device20US 6,162,030 AEncyNova International, Inc. · 2000
  • Air discharging apparatus and image forming apparatus3US 8,139,973 B2Ricoh Company, Ltd. · 2012

Top assignees

Documents
  • Ricoh Company, Ltd.2
  • EIEncyNova International, Inc.1

Often classified with

  • F02BInternal-combustion piston engines4
  • F01BMachines or engines, in general or of positive-displacement type2
  • F05CIndexing scheme relating to materials, material properties or material characteristics for machines1

Documents that also carry the other class.

patentgrep

Search every US patent grant since 1976 and every published application since 2001. Updated weekly from USPTO.

Product

  • Search
  • New this week
  • Where the data comes from
  • Pricing

Browse

  • Companies
  • Technology classes

Developers

  • API docs
  • PatentsView-compatible API
  • MCP server
  • Changelog

About

  • Privacy
  • Terms
© 2026 patentgrepData from USPTO bulk files