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US3792834A
Expired / Lapsed
US
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Packing seals
Assignee: Sloan Valve Co
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Filing: 1973-01-22
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Granted: 1974-02-19
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Expires: 1993-01-22
Abstract
Abstract An annular flexible leak-proof packing seal for use in the connection between the air brake pipe on a railway car and the angle cock. The packing sleeve has two grooves around it which are compressed when the sleeve is in place, and on low temperatures the packing sleeve effects a configuration to provide the leak-proof seal regardless of its shrinkage.
Inventors
- 👤 H Billeter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:21
CPC Classifications
F; F16; F16L; F16L19/00; F16L19/06; F16L19/061; F16L29/00; F16L29/007
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
258 words
A railroad angle cock including a housing having a generally cylindrical inlet chamber and an outlet, a valve member positioned within said housing for controlling communication between said inlet chamber and said outlet, a generally cylindrical seal member confined in said chamber and subjected to compression in an axial direction, said seal member having a pair of spaced peripherally extending annular grooves about the exterior thereof, each of said grooves being generally semicircular in shape and having a depth generally equal to one-half the thickness of the seal member, said grooves being spaced inwardly from the ends of the seal member a distance generally equal to the width of the grooves, said grooves having an outer width generally equal to the thickness of the seal member, the length of the seal member being generally equal to one-half of its diameter, axial compression applied to said seal member causing the groove sides to move toward a closure and causing the central area of said seal, between the grooves, to be distorted outwardly and the ends of the seal, adjacent the grooves, to be distorted inwardly to provide firm seals with the inner and outer axIally extending walls of the chamber, said seal being formed of a material such that low temperature shrinkage causes said grooves to tend to open and said seal to bow outwardly adjacent the center to provide a firm seal at the central area of the chamber outer wall and firm seals at the ends of the seal, adjacent the grooves, with the chamber inner wall.
Claim 2
Dependent Claim
258 words
A railroad angle cock including a housing having a generally cylindrical inlet chamber and an outlet, a valve member positioned within said housing for controlling communication between said inlet chamber and said outlet, a generally cylindrical seal member confined in said chamber and subjected to compression in an axial direction, said seal member having a pair of spaced peripherally extending annular grooves about the exterior thereof, each of said grooves being generally semicircular in shape and having a depth generally equal to one-half the thickness of the seal member, said grooves being spaced inwardly from the ends of the seal member a distance generally equal to the width of the grooves, said grooves having an outer width generally equal to the thickness of the seal member, the length of the seal member being generally equal to one-half of its diameter, axial compression applied to said seal member causing the groove sides to move toward a closure and causing the central area of said seal, between the grooves, to be distorted outwardly and the ends of the seal, adjacent the grooves, to be distorted inwardly to provide firm seals with the inner and outer axIally extending walls of the chamber, said seal being formed of a material such that low temperature shrinkage causes said grooves to tend to open and said seal to bow outwardly adjacent the center to provide a firm seal at the central area of the chamber outer wall and firm seals at the ends of the seal, adjacent the grooves, with the chamber inner wall.
Claim 3
Dependent Claim
20 words
The structure of claim 1 further characterized by and including a pipe within said chamber forming the inner wall thereof.
Claim 4
Dependent Claim
37 words
The structure of claim 2 further characterized by and including a compression nut positioned about said pipe outside of said housing and having a portion extending within said housing for applying endwise compression on said seal member.
Claim 5
Dependent Claim
17 words
The structure of claim 3 further characterized by a friction ring positioned between said nut and seal.
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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |