GB2289517A - Width-reduced three-piece oil rig - Google Patents

Width-reduced three-piece oil rig

Info

Publication number
GB2289517A
GB2289517A GB9510795A GB9510795A GB2289517A GB 2289517 A GB2289517 A GB 2289517A GB 9510795 A GB9510795 A GB 9510795A GB 9510795 A GB9510795 A GB 9510795A GB 2289517 A GB2289517 A GB 2289517A
Authority
GB
United Kingdom
Prior art keywords
projection
circumference side
axially
expanding
internal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB9510795A
Other versions
GB9510795D0 (en
GB2289517B (en
Inventor
Katsushi Isihara
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Piston Ring Co Ltd
Original Assignee
Nippon Piston Ring Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Piston Ring Co Ltd filed Critical Nippon Piston Ring Co Ltd
Publication of GB9510795D0 publication Critical patent/GB9510795D0/en
Publication of GB2289517A publication Critical patent/GB2289517A/en
Application granted granted Critical
Publication of GB2289517B publication Critical patent/GB2289517B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J9/00—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction
    • F16J9/06—Piston-rings, e.g. non-metallic piston-rings, seats therefor; Ring sealings of similar construction using separate springs or elastic elements expanding the rings; Springs therefor ; Expansion by wedging
    • F16J9/064—Rings with a flat annular side rail
    • F16J9/065—Spring expander with massive cross-section

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pistons, Piston Rings, And Cylinders (AREA)

Abstract

A width-reduced three-piece oil ring comprising an incomplete torus space expander (10) constituted by a shape steel material having a substantially H-shaped cross section and comprising in turn a projection (12) on the external circumference side expanding axially vertically, a projection (13) on the internal circumference side which is axially longer than the projection on the external circumferences side and expanding axially vertically, an intermediate portion (16) thinned axially and connecting the both projections and slits (11) cut into the intermediate portion (16) alternately from the projection (12) on the external circumference side and the projection (13) on the internal circumference side, and two side rails (20, 20') calming the space expander from the top and bottom thereof. In order to make the friction of the oil ring lower without increasing the tension of the space expander (10) and reduce the oil consumption, upper and lower side rail pressing surfaces (15, 15') for pressing the internal circumferential surfaces (21, 21') of the side rails (20, 20') are formed on the upper and lower surfaces of the axially vertically expanding projection (13) on the internal circumference side which face radially outwardly, and the inclination angle of at least one of the upper and lower side rail pressing surfaces (15, 15') is set less than 15, relative to the axial direction. <IMAGE>
GB9510795A 1993-10-25 1994-10-12 Width-reduced three-piece oil rig Expired - Fee Related GB2289517B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP26594793A JPH07119833A (en) 1993-10-25 1993-10-25 Thin three piece oil ring
PCT/JP1994/001703 WO1995012079A1 (en) 1993-10-25 1994-10-12 Width-reduced three-piece oil ring

Publications (3)

Publication Number Publication Date
GB9510795D0 GB9510795D0 (en) 1995-07-19
GB2289517A true GB2289517A (en) 1995-11-22
GB2289517B GB2289517B (en) 1996-11-13

Family

ID=17424290

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9510795A Expired - Fee Related GB2289517B (en) 1993-10-25 1994-10-12 Width-reduced three-piece oil rig

Country Status (4)

Country Link
JP (1) JPH07119833A (en)
DE (1) DE4498214T1 (en)
GB (1) GB2289517B (en)
WO (1) WO1995012079A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117006245A (en) * 2019-02-01 2023-11-07 日本活塞环株式会社 Combined oil ring

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0478376A (en) * 1990-07-20 1992-03-12 Nippon Piston Ring Co Ltd Thin-width three-piece oil ring
JPH0464656U (en) * 1990-10-16 1992-06-03
JPH04300467A (en) * 1991-03-28 1992-10-23 Teikoku Piston Ring Co Ltd Combination oil ring

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0478376A (en) * 1990-07-20 1992-03-12 Nippon Piston Ring Co Ltd Thin-width three-piece oil ring
JPH0464656U (en) * 1990-10-16 1992-06-03
JPH04300467A (en) * 1991-03-28 1992-10-23 Teikoku Piston Ring Co Ltd Combination oil ring

Also Published As

Publication number Publication date
DE4498214T1 (en) 1995-11-23
GB9510795D0 (en) 1995-07-19
JPH07119833A (en) 1995-05-12
GB2289517B (en) 1996-11-13
WO1995012079A1 (en) 1995-05-04

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20101012