US4285534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulsation-absorbing flexible pipe for pressure fluid device
Assignee: Nichirin Rubber Ind Co Ltd
•
Filing: 1979-12-28
•
Granted: 1981-08-25
•
Expires: 1999-12-28
Abstract
Abstract A pulsation-absorbing flexible pipe being provided with a throttling material at each end of connection metal fittings arranged at both ends of a flexible pipe, and a throttling means, which has a bore of a diameter smaller than that of the flexible pipe, inside of a bore in the flexible pipe, thereby efficiently absorbing pulsation of a pressure fluid discharged from a pressure fluid-feeding device in a pressure fluid device.
Inventors
- 👤 Toshiyuki Katayama
- 👤 Kiyokazu Agura
- 👤 Masayuki Matsuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:32
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/04; F16L55/02; F16L55/027
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
163 words
A pulsation-absorbing flexible pipe for a pressure fluid device, comprising a first connection metal fitting, having one end for connection to a discharge opening of a pressure fluid-feeding device, a second connection metal fitting, having one end for connection to a feed opening of a working device operated by the pressure fluid discharged from said pressure fluid-feeding device; a flexible pipe coupled to the other ends of said first connection metal fitting and said second connection metal fitting; first throttling means positioned at the other ends of said first connection metal fitting and said second connection metal fitting, said first throttling means having a bore of a diameter smaller than that of the connection metal fittings; and a second throttling means positioned inside of the bore of said flexible pipe, said second throttling means having a bore of a diameter smaller than that of the flexible pipe wherein said second throttling means prevents noise resulting from pulsating of fluid in said flexible pipe.
Claim 2
Dependent Claim
163 words
A pulsation-absorbing flexible pipe for a pressure fluid device, comprising a first connection metal fitting, having one end for connection to a discharge opening of a pressure fluid-feeding device, a second connection metal fitting, having one end for connection to a feed opening of a working device operated by the pressure fluid discharged from said pressure fluid-feeding device; a flexible pipe coupled to the other ends of said first connection metal fitting and said second connection metal fitting; first throttling means positioned at the other ends of said first connection metal fitting and said second connection metal fitting, said first throttling means having a bore of a diameter smaller than that of the connection metal fittings; and a second throttling means positioned inside of the bore of said flexible pipe, said second throttling means having a bore of a diameter smaller than that of the flexible pipe wherein said second throttling means prevents noise resulting from pulsating of fluid in said flexible pipe.
Claim 3
Dependent Claim
30 words
The flexible pipe of claim 1, wherein the diameter of the bore of said second throttling means is approximately equal to that of the bore of said first throttling means.
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) | 1984-08-24 | 1985-02-23 | 1985-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-24 | 1989-02-23 | 1989-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-24 | 1993-02-23 | 1993-08-25 | $7700.00 | Window Closed / Lapsed |