US4377290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Symmetrical seal package for multiple face seals
Assignee: John Crane Inc
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Filing: 1982-03-22
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Granted: 1983-03-22
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Expires: 2002-03-22
Abstract
Abstract A symmetrical package seal containing two balanced end face seals, the stationary components being adapted for use with shafts of different sizes. In addition, the package seal has means for centering the rotating components relative to the stationary components, for aligning the sealing faces parallel contact, and for bleeding fluid from the chamber formed by the end face seals.
Inventors
- 👤 James P. Netzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:58
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/3464; F16J15/348; F16J15/3484
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
151 words
A symmetrical package seal comprising a. inner and outer concentric cylindrical members defining a seal package for sealing the space between a rotatable shaft and a housing, said outer member having a flange for affixing said seal package to the housing and said inner member adapted to sealingly engage the shaft; b. said outer member having an internal surface configuration defining two spaced apart secondary seal seats for receiving two primary seal rings; c. said inner member having a backing collar at opposite ends thereof; and d. balanced radial end face seals positioned within said package in back to back relation to define a fluid chamnber within said package, said seals comprising identical mating rings mounted on said inner member and having a radially extending sealing surface; identical primary seals mounted in driving sealing relation in said outer member and having radial sealing surfaces in sealing engagement with said mating rings.
Claim 2
Dependent Claim
151 words
A symmetrical package seal comprising a. inner and outer concentric cylindrical members defining a seal package for sealing the space between a rotatable shaft and a housing, said outer member having a flange for affixing said seal package to the housing and said inner member adapted to sealingly engage the shaft; b. said outer member having an internal surface configuration defining two spaced apart secondary seal seats for receiving two primary seal rings; c. said inner member having a backing collar at opposite ends thereof; and d. balanced radial end face seals positioned within said package in back to back relation to define a fluid chamnber within said package, said seals comprising identical mating rings mounted on said inner member and having a radially extending sealing surface; identical primary seals mounted in driving sealing relation in said outer member and having radial sealing surfaces in sealing engagement with said mating rings.
Claim 3
Dependent Claim
20 words
A seal package as recited in claim 1 in which end face seals are mounted in back to back relation.
Claim 4
Dependent Claim
23 words
A seal package as recited in claim 2 in which a single spring is used to bias said primary rings into sealing engagement.
Claim 5
Dependent Claim
106 words
A package seal comprising: a. inner and outer cylindrical members concentric to one another; said outer cylindrical member having a flange for affixing said seal to a housing; b. multiple radial end face seals mounted within said cylindrical cylinders defining a chamber for a buffer fluid; c. removable connecting means for locking said inner and outer cylindrical members in position for shipping the unit as a package and for bleeding fluids from the chamber, said connecting means including an elongated spacer means positioned between said inner and outer members and pin means extending from said outer member through said spacer means and into said inner member.
Claim 6
Dependent Claim
106 words
A package seal comprising: a. inner and outer cylindrical members concentric to one another; said outer cylindrical member having a flange for affixing said seal to a housing; b. multiple radial end face seals mounted within said cylindrical cylinders defining a chamber for a buffer fluid; c. removable connecting means for locking said inner and outer cylindrical members in position for shipping the unit as a package and for bleeding fluids from the chamber, said connecting means including an elongated spacer means positioned between said inner and outer members and pin means extending from said outer member through said spacer means and into said inner member.
Claim 7
Dependent Claim
121 words
A symmetrical package seal comprising a. an outer cylindrical member adapted to be mounted over a shaft and affixed to a housing; b. identical primary seal rings mounted in said outer member in back to back relation and having a driving connection to said outer member, said primary rings and outer member having dimensions for receiving shafts of different dimensions; c. secondary seal members comprising O-rings mounted in sealing relationship between said primary rings and said outer member; d. bias means extending between said primary rings; e. an inner sleeve member adapted to be sealing engaged over a shaft extending into said housing; f. identical mating rings mounted on said sleeve member for mating with said primary rings in sealing engagement.
Claim 8
Dependent Claim
121 words
A symmetrical package seal comprising a. an outer cylindrical member adapted to be mounted over a shaft and affixed to a housing; b. identical primary seal rings mounted in said outer member in back to back relation and having a driving connection to said outer member, said primary rings and outer member having dimensions for receiving shafts of different dimensions; c. secondary seal members comprising O-rings mounted in sealing relationship between said primary rings and said outer member; d. bias means extending between said primary rings; e. an inner sleeve member adapted to be sealing engaged over a shaft extending into said housing; f. identical mating rings mounted on said sleeve member for mating with said primary rings in sealing engagement.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-03-21 | 1986-09-20 | 1987-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-03-21 | 1990-09-20 | 1991-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-03-21 | 1994-09-20 | 1995-03-22 | $7700.00 | Window Closed / Lapsed |