US3594019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary joint
Assignee: Johnson Corp
•
Filing: 1969-07-22
•
Granted: 1971-07-20
•
Expires: 1989-07-22
Abstract
Abstract A rotary joint having a nipple with a closed end and a vented head.
Inventors
- 👤 Ralph W Gotschall
- 👤 Lawrence J Mcdonough
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:29
CPC Classifications
F; F16; F16L; F16L27/00; F16L27/08; F16L27/087; F16L27/093
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
234 words
In a rotary joint of the type having a nipple adapted to be attached to and driven by a rotated part, axially spaced thrust collars on said nipple, a fixed housing embracing the end of said nipple remote from the rotated part, a fluid inlet in said housing for admitting fluid under pressure, a radial port defined by said nipple and located between said collars for conducting fluid pressure from said housing to the interior of said nipple, sealing rings disposed between said collars and said housing to seal fluid pressure flowing between said inlet and said port, the improvement comprising a wall having an interior side and an exterior side closing one end of said nipple, said wall being disposed to the side of said port remote from the end of said nipple attached to the rotated part, said interior side of said wall being exposed to the fluid pressure within said nipple, a chamber defined between said housing and said exterior side of said wall, means for venting said chamber into a zone of lower fluid pressure than the operating fluid pressure within said nipple, one of said thrust collars having a cylindrical bore, the closed end of said nipple being cylindrical and received in said bore for relative movement, means providing a seal between said bore and said cylindrical closed end, one end of said bore opening into said vented chamber.
Claim 2
Dependent Claim
234 words
In a rotary joint of the type having a nipple adapted to be attached to and driven by a rotated part, axially spaced thrust collars on said nipple, a fixed housing embracing the end of said nipple remote from the rotated part, a fluid inlet in said housing for admitting fluid under pressure, a radial port defined by said nipple and located between said collars for conducting fluid pressure from said housing to the interior of said nipple, sealing rings disposed between said collars and said housing to seal fluid pressure flowing between said inlet and said port, the improvement comprising a wall having an interior side and an exterior side closing one end of said nipple, said wall being disposed to the side of said port remote from the end of said nipple attached to the rotated part, said interior side of said wall being exposed to the fluid pressure within said nipple, a chamber defined between said housing and said exterior side of said wall, means for venting said chamber into a zone of lower fluid pressure than the operating fluid pressure within said nipple, one of said thrust collars having a cylindrical bore, the closed end of said nipple being cylindrical and received in said bore for relative movement, means providing a seal between said bore and said cylindrical closed end, one end of said bore opening into said vented chamber.
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) | 1974-07-19 | 1975-01-18 | 1975-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-19 | 1979-01-18 | 1979-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-19 | 1983-01-18 | 1983-07-20 | $7700.00 | Window Closed / Lapsed |