US3554558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealed joint
Assignee: Gebrueder Boehler and Co AG
•
Filing: 1968-05-24
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Granted: 1971-01-12
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Expires: 1988-05-24
Abstract
Abstract A movable machine element extends through a housing and defines a gap therewith. A supply line communicates with the gap at an intermediate point of the length thereof and is adapted to supply liquid sealing fluid to the gap. Cooling means are provided to cool the sealing fluid in the gap below its solidification point on both sides of the intermediate point.
Inventors
- 👤 Gundolf Rajakovics
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:15
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/40; F16J15/403; G; G21; G21C; G21C13/00; G21C13/02; G21C13/028; Y; Y02; Y02E; Y02E30/00; Y02E30/30; Y10; Y10S; Y10S277/00; Y10S277/929; Y10S277/93; Y10T; Y10T137/00; Y10T137/4456; Y10T137/4621
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
92 words
A sealed joint, comprising: a housing; a movable machine element extending through said housing and defining a gap between the outer periphery of said element and the inner periphery of the housing; a supply line communicating with said gap at an intermediate point of the length thereof and with a source of liquid-sealing fluid adapted to supply liquid-sealing fluid to said gap; and cooling means for the housing in proximity to the gap for cooling said sealing fluid in said gap below its solidification point on both sides of said intermediate point.
Claim 2
Dependent Claim
92 words
A sealed joint, comprising: a housing; a movable machine element extending through said housing and defining a gap between the outer periphery of said element and the inner periphery of the housing; a supply line communicating with said gap at an intermediate point of the length thereof and with a source of liquid-sealing fluid adapted to supply liquid-sealing fluid to said gap; and cooling means for the housing in proximity to the gap for cooling said sealing fluid in said gap below its solidification point on both sides of said intermediate point.
Claim 3
Dependent Claim
23 words
The sealed joint as claimed in claim 1, which further comprises means for maintaining said sealing fluid in said source under superatmospheric pressure.
Claim 4
Dependent Claim
25 words
The sealed joint as claimed in claim 1, which further comprises means for maintaining a protective gas atmosphere over said sealing fluid in said source.
Claim 5
Dependent Claim
17 words
The sealed joint as claimed in claim 1, which further comprises means for heating said supply line.
Claim 6
Dependent Claim
17 words
The sealed joint as claimed in claim 1, which further comprises means for heat-insulating said supply line.
Claim 7
Dependent Claim
20 words
The sealed joint as claimEd in claim 1, which further comprises means for heating said gap between said cooling means.
Claim 8
Dependent Claim
20 words
The sealed joint as claimed in claim 1, which further comprises means for heat-insulating said gap between said cooling means.
Claim 9
Dependent Claim
28 words
The sealed joint as claimed in claim 1, in which said supply line is connected to a reservoir and expansion vessel constituting said source for said liquid-sealing fluid.
Claim 10
Dependent Claim
19 words
The sealed joint as claimed in claim 8, which further comprises means for heating said reservoir and expansion vessel.
Claim 11
Dependent Claim
19 words
The sealed joint as claimed in claim 8, which further comprises means for heat-insulating said reservoir and expansion vessel.
Claim 12
Dependent Claim
27 words
The sealed joint as claimed in claim 1, in which said housing is defined by a guide bushing and said movable machine element by a valve stem.
Claim 13
Dependent Claim
28 words
The sealed joint as claimed in claim 1, in which said movable machine element is at least as large in diameter in said gap as outside said gap.
Claim 14
Dependent Claim
19 words
The sealed joint as claimed in claim 1, in which said movable machine element is hollow in said gap.
Claim 15
Dependent Claim
22 words
The sealed joint as claimed in claim 13, in which said movable machine element is filled with heat-insulating material in said gap.
Claim 16
Dependent Claim
22 words
The sealed joint as claimed in claim 13, in which said movable machine element is filled with heat-conducting material in said gap.
Claim 17
Dependent Claim
23 words
The sealed joint as claimed in claim 1, in which said housing is permanently connected to a hollow body containing an operating fluid.
Claim 18
Dependent Claim
52 words
The sealed gap as claimed in claim 1, in which said housing communicates with a container holding an operating fluid and said operating fluid is different from said sealing fluid and adapted to contact the same and is adequately compatible therewith under the conditions prevailing at the point of contact in operation.
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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |