Pressurized pen

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 7819601
APP PUB NO 20090060625A1
SERIAL NO

12215824

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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Provided is a pressurized pen, which is enabled to enhance the sealing property of a compression chamber at a pressurizing time in the knocking operation of a knock mechanism and to improve the durability. A pressuring pump mechanism includes: a pressure member having a front end opening portion communicating with the inside of a medium containing tube and a compression chamber made extensible and contractible in axial direction; and a push member for coming in axial direction into and out of abutment against a rear end opening portion of the pressure member and for pushing the compression chamber of the pressure member in a gas-tight condition in a compressing direction. The push member is associated with the pushing action of a knock mechanism such that it is enabled to irrotationally move toward the rear end opening portion of the pressure member.

First Claim

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Patent Owner(s)

Patent OwnerAddress
TOMBOW PENCIL CO LTDTOKYO 114-8583

International Classification(s)

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  • 2008 Application Filing Year
  • B43K Class
  • 124 Applications Filed
  • 80 Patents Issued To-Date
  • 64.52 % Issued To-Date
Click to zoom InYear of Issuance% of Matters IssuedCumulative IssuancesYearly Issuances20082009201020112012201320142015201620170255075100

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Taniguchi, Shunichi Saitama, JP 5 29

Cited Art Landscape

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Patent Citation Ranking

  • 3 Citation Count
  • B43K Class
  • 2.27 % this patent is cited more than
  • 15 Age
Citation count rangeNumber of patents cited in rangeNumber of patents cited in various citation count ranges130102101 - 1011 - 2021 - 3031 - 4002468101214161820222426283032

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