JPS5596344A - Coil expander and its manufacturing method - Google Patents

Coil expander and its manufacturing method

Info

Publication number
JPS5596344A
JPS5596344A JP221979A JP221979A JPS5596344A JP S5596344 A JPS5596344 A JP S5596344A JP 221979 A JP221979 A JP 221979A JP 221979 A JP221979 A JP 221979A JP S5596344 A JPS5596344 A JP S5596344A
Authority
JP
Japan
Prior art keywords
ring
expander
coil expander
circumference
external
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.)
Pending
Application number
JP221979A
Other languages
Japanese (ja)
Inventor
Yoshio Naito
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
Priority to JP221979A priority Critical patent/JPS5596344A/en
Publication of JPS5596344A publication Critical patent/JPS5596344A/en
Pending 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
    • F16J9/061—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 using metallic coiled or blade springs
    • F16J9/062—Coiled spring along the entire circumference

Abstract

PURPOSE:To improve the durability of an oil ring and a coil expander by forming the nitrided external face of the coil expander combined with the oil ring fixed onto a piston of an internal combustion engine. CONSTITUTION:An oil ring 1 is stuck into the circumference of a piston giving no illustration of it. A coil expander 2 circular, rectangular or trapezoidal in section is situated in the bottom of the ring so that the ring 1 can make constant contact with a cylinder liner giving no illustration of it. The internal circumference 12 of the ring and the external circumference 21 of the expander meet in contact with the ring 1 and the expander 2. A nitride 22 is formed over both the internal and external circumferences 12, 21 to improve the stiffness at the contact area.
JP221979A 1979-01-16 1979-01-16 Coil expander and its manufacturing method Pending JPS5596344A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP221979A JPS5596344A (en) 1979-01-16 1979-01-16 Coil expander and its manufacturing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP221979A JPS5596344A (en) 1979-01-16 1979-01-16 Coil expander and its manufacturing method

Publications (1)

Publication Number Publication Date
JPS5596344A true JPS5596344A (en) 1980-07-22

Family

ID=11523240

Family Applications (1)

Application Number Title Priority Date Filing Date
JP221979A Pending JPS5596344A (en) 1979-01-16 1979-01-16 Coil expander and its manufacturing method

Country Status (1)

Country Link
JP (1) JPS5596344A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58142344U (en) * 1982-03-19 1983-09-26 帝国ピストンリング株式会社 Oil ring with expander
US4522412A (en) * 1982-10-26 1985-06-11 Keikoku Piston Ring Co., Ltd. Oil ring with coil expander
US5295696A (en) * 1991-04-04 1994-03-22 Teikoku Piston Ring Co., Ltd. Combined oil ring

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4814114U (en) * 1971-06-28 1973-02-16
JPS54125316A (en) * 1978-03-24 1979-09-28 Riken Piston Ring Ind Co Ltd Coil expander combination piston ring

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4814114U (en) * 1971-06-28 1973-02-16
JPS54125316A (en) * 1978-03-24 1979-09-28 Riken Piston Ring Ind Co Ltd Coil expander combination piston ring

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58142344U (en) * 1982-03-19 1983-09-26 帝国ピストンリング株式会社 Oil ring with expander
US4522412A (en) * 1982-10-26 1985-06-11 Keikoku Piston Ring Co., Ltd. Oil ring with coil expander
US5295696A (en) * 1991-04-04 1994-03-22 Teikoku Piston Ring Co., Ltd. Combined oil ring

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