Patent US1306364A successfully refreshed from Google Patents.
US4155558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Completely fluidtight and frictionless shaft seal packing
Assignee: Individual
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Filing: 1977-11-25
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Granted: 1979-05-22
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Expires: 1997-11-25
Abstract
Abstract A packing apparatus comprising: a plurality of thin, annular packing members each embracing the arched portions in the cross section being so arranged in an axial layer, with their peripheral parts held in contact with a shaft, so as to form gaps with adjacent members at the portions in contact with the shaft, and concave and convex cover members being inserted at both ends of the packing assembly thus arranged.
Inventors
- 👤 Giichi Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:30
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/18; F16J15/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
A labryrinth packing arrangement comprising annular thin sheet, mineral fiber, molded packing members, impregnated with a synthetic resin of a cross-sectional configuration having an arched portion on the front and rear side and flat, thin sheet separator segment members of the same shape and cross section as said packing member with an inner diameter slightly larger than that of the packing members, a plurality of both members being altermately arranged in an array assembly; concave and convex cover members respectively disposed on the front and back side of said assembly, said packing arrangement thus being disposed over the outer periphery of a shaft which passes through the wall of a stuffing box casing filled with a fluid, said stuffing box having a flat end surface and said casing being tightened against said flat end surface of said stuffing box.
Claim 2
Dependent Claim
139 words
A labryrinth packing arrangement comprising annular thin sheet, mineral fiber, molded packing members, impregnated with a synthetic resin of a cross-sectional configuration having an arched portion on the front and rear side and flat, thin sheet separator segment members of the same shape and cross section as said packing member with an inner diameter slightly larger than that of the packing members, a plurality of both members being altermately arranged in an array assembly; concave and convex cover members respectively disposed on the front and back side of said assembly, said packing arrangement thus being disposed over the outer periphery of a shaft which passes through the wall of a stuffing box casing filled with a fluid, said stuffing box having a flat end surface and said casing being tightened against said flat end surface of said stuffing box.
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) | 1982-05-21 | 1982-11-20 | 1983-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-21 | 1986-11-20 | 1987-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-21 | 1990-11-20 | 1991-05-22 | $7700.00 | Window Closed / Lapsed |