US3836158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Packing ring
Assignee: Chevron USA Inc
•
Filing: 1973-03-07
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Granted: 1974-09-17
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Expires: 1993-03-07
Abstract
Abstract A reciprocating action rod is equipped with a packing ring positioned around the rod to prevent the escaping of fluids, said packing ring comprising a plurality of generally arcuately-shaped sections containing pin stop members positioned therein to limit the inward movement of the ring sections and so prevent damage to the reciprocating rod.
Inventors
- 👤 C Davison
- 👤 R Ott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:03
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/26
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
110 words
A packing ring comprising a plurality of generally arcuatelyshaped sections which when assembled end to end define radially inner and outer cylindrical surfaces and annular side surfaces at least one of which is subjected to pressure, the ends of such sections having chordal sealing surfaces for sliding abutment with each other, one end of said chordal surfaces terminating adjacent said cylindrical surfaces in a manner permitting reduction of the diameters of said cylindrical surfaces, a pin stop member extending outwardly from each radially inner chordal sealing surface in a manner to limit reduction of the diameters of said cylindrical surfaces, and an outer spring holding said sections in assembled relationship.
Claim 2
Dependent Claim
110 words
A packing ring comprising a plurality of generally arcuatelyshaped sections which when assembled end to end define radially inner and outer cylindrical surfaces and annular side surfaces at least one of which is subjected to pressure, the ends of such sections having chordal sealing surfaces for sliding abutment with each other, one end of said chordal surfaces terminating adjacent said cylindrical surfaces in a manner permitting reduction of the diameters of said cylindrical surfaces, a pin stop member extending outwardly from each radially inner chordal sealing surface in a manner to limit reduction of the diameters of said cylindrical surfaces, and an outer spring holding said sections in assembled relationship.
Claim 3
Dependent Claim
26 words
The packing ring of claim 1 wherein each section further comprises shoulders which terminate at the inner cylindrial surface and coincide with the radii extending thereto.
Claim 4
Dependent Claim
34 words
The packing ring of claim 2 wherein each said pin stop member is positioned so as to permit said sections to move inwardly until said shoulders of adjacent sections are in abutting sealing relationship.
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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) | 1977-09-16 | 1978-03-18 | 1978-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-16 | 1982-03-18 | 1982-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-16 | 1986-03-18 | 1986-09-17 | $7700.00 | Window Closed / Lapsed |