US3884511A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nitrogen charged swivel joint
Assignee: Oil States Industries Inc
•
Filing: 1972-08-10
•
Granted: 1975-05-20
•
Expires: 1992-08-10
Abstract
Abstract A swivel joint in which seals are provided straddling the ball bearing sections of the joint, and the ball bearing section of the joint is charged with an inert gas.
Inventors
- 👤 Dean E Hermanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:27
CPC Classifications
F; F16; F16L; F16L27/00; F16L27/08; F16L27/0804; F16L27/0808; F16L27/0824; F16L27/0828; Y; Y10; Y10S; Y10S285/00; Y10S285/904
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
147 words
A swivel joint comprising, a body having a flow way therethrough, bearing race means in the wall of the body providing said flow way, a nipple having a flow way therethrough, bearing race means in the outer periphery of said nipple, bearings in said bearing race means, seal means straddling said bearing race means, and an inert gas under positive pressure in the space between said seals, the seal means exposed to the exterior of said swivel joint preventing loss of said inert gas from between said seal means, the seal means exposed to the interior of said swivel joint preventing flow in either direction to contain said inert gas and prevent flow of fluid from said flow way into the space between said seals, said body and nipple in thE area between said seal means impervious to prevent flow of fluid to or from said area.
Claim 2
Dependent Claim
147 words
A swivel joint comprising, a body having a flow way therethrough, bearing race means in the wall of the body providing said flow way, a nipple having a flow way therethrough, bearing race means in the outer periphery of said nipple, bearings in said bearing race means, seal means straddling said bearing race means, and an inert gas under positive pressure in the space between said seals, the seal means exposed to the exterior of said swivel joint preventing loss of said inert gas from between said seal means, the seal means exposed to the interior of said swivel joint preventing flow in either direction to contain said inert gas and prevent flow of fluid from said flow way into the space between said seals, said body and nipple in thE area between said seal means impervious to prevent flow of fluid to or from said area.
Claim 3
Dependent Claim
23 words
The swivel joint of claim 1 wherein the inert gas is selected from the group consisting of nitrogen, helium, argon, neon, and crypton.
Claim 4
Dependent Claim
32 words
The joint of claim 1 wherein spaced ports are provided in the body communicating with the race way, a plug seals one port, and a valve controls flow through the other port.
Claim 5
Dependent Claim
17 words
The swivel joint of claim 1 wherein the body and nipple are fabricated of 9% nickel steel.
Claim 6
Dependent Claim
22 words
The swivel joint of claim 1 wherein the nipple and housing are fabricated of nickel steel and the inert gas is nitrogen.
References Cited (Backward Citations)
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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) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |