Patent US4565266A successfully refreshed from Google Patents.
US4565266A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil type damper
Assignee: Nifco Inc
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Filing: 1984-04-30
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Granted: 1986-01-21
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Expires: 2004-04-30
Abstract
Abstract An oil type damper comprises a cylindrical wall formed integrally with a base secured on a given machine, a cap set in place rotatably within the cylindrical wall and integrated with a toothed wheel, a seal disk forming a housing in combination with the cap, and oil filling the interior of the housing. The integration of the toothed wheel and the cap decreases the number of component parts, reduces the time and labor involved in assembly, and permits size reduction of the damper.
Inventors
- 👤 Nobuaki Omata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:52
CPC Classifications
F; F16; F16F; F16F9/00; F16F9/10; F16F9/12; E; E05; E05F; E05F3/00; E05F3/14; E05Y; E05Y2201/00; E05Y2201/20; E05Y2201/21; E05Y2201/252; E05Y2201/254; E05Y2201/262; E05Y2201/266; E05Y2800/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
136 words
An oil type damper, comprising a blind cylindrical wall 15 formed integrally with a base having means 14 adapted to be secured to a given machine, a cap 11 set in place within said cylindrical wall 15 and retained rotatably therein, a seal disk 17 provided with a central hole, fixed integrally with said cap to cover the lower surface of said cap and adapted to form a housing in combination with said cap, and oil 18 filling the interior of said housing, said housing accommodating therein a stationary disk 16, said stationary disk being provided with a shaft 20 adapted to restrain the rotation of said stationary disk relative to the rotation of said cap, and said shaft being extended outwardly through a central hole in said seal disk and non-rotatably connected to said base.
Claim 2
Dependent Claim
136 words
An oil type damper, comprising a blind cylindrical wall 15 formed integrally with a base having means 14 adapted to be secured to a given machine, a cap 11 set in place within said cylindrical wall 15 and retained rotatably therein, a seal disk 17 provided with a central hole, fixed integrally with said cap to cover the lower surface of said cap and adapted to form a housing in combination with said cap, and oil 18 filling the interior of said housing, said housing accommodating therein a stationary disk 16, said stationary disk being provided with a shaft 20 adapted to restrain the rotation of said stationary disk relative to the rotation of said cap, and said shaft being extended outwardly through a central hole in said seal disk and non-rotatably connected to said base.
Claim 3
Dependent Claim
31 words
A damper according to claim 1, wherein said shaft 19 having a non-circular portion 20 for restraining the rotation of said stationary disk is formed integrally with said stationary disk 16.
Claim 4
Dependent Claim
45 words
A damper according to claim 1, wherein said shaft 26 for restraining the rotation of said stationary disk 16 is formed independently of said stationary disk 16 and includes a non-circular portion 25 fitted into a complimentry hole of said stationary disk and connected thereto.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-20 | 1989-07-22 | 1990-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-20 | 1993-07-22 | 1994-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-20 | 1997-07-22 | 1998-01-21 | $7700.00 | Window Closed / Lapsed |