Variable compression ratio apparatus

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 8499725
APP PUB NO 20120042854A1





Loading Importance Indicators... loading....


See full text

A variable compression ratio apparatus may include a connecting rod provided with one end formed of a mounting hole and the other end eccentrically and rotatably connected to a crankshaft, wherein a piston pin may be inserted in the mounting hole and the connecting rod may be rotatably connected to the piston through the piston pin, an eccentric link provided with an eccentric bearing concentrically and rotatably mounted in the mounting hole may be connected and, the piston pin being eccentrically and rotatably mounted in the eccentric bearing, a variable link pivotally connected to the eccentric link, a variable gear link pivotal with respect to a fixed shaft and having a first gear teeth at an exterior circumference thereof, an external circumferential portion thereof being rotatably connected to the variable link, and a control shaft formed of a second gear teeth engaged to the first gear teeth.

Loading the Abstract Image... loading....

First Claim

See full text


Loading Family data... loading....

Patent Owner(s)

Patent OwnerAddress

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]


Inventor Name Address # of filed Patents Total Citations
Kong, Jin Kook Suwon-si, KR 77 260
Kwak, Young Hong Suwon-si, KR 44 125
Lee, Dong Seok Suwon-si, KR 27 311
Lee, Eun Ho Hwaseong-si, KR 44 88
Ryu, Yen Wha Hwaseong-si, KR 2 12
Woo, Soo Hyung Yongin-si, KR 66 129
Yang, Jei Choon Yongin-si, KR 22 89

Cited Art Landscape

Load Citation

Patent Citation Ranking

Forward Cite Landscape

Load Citation

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
7.5 Year Payment $3600.00 $1800.00 $900.00 Feb 6, 2021
11.5 Year Payment $7400.00 $3700.00 $1850.00 Feb 6, 2025
Fee Large entity fee small entity fee micro entity fee
Surcharge - 7.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00