US3871666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaft packing
Assignee: Carl Freudenberg KG
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Filing: 1973-03-05
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Granted: 1975-03-18
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Expires: 1993-03-05
Abstract
Abstract A shaft packing including a damming component over a part of the shaft periphery which reduces the free space between a sealing element and the shaft to a narrow slit. An oil inlet and exhaust are located at the ends of this damming component. The free space between the shaft, the sealing element and the surrounding part e.g., the housing or an insert is shaped in a way to assure a laminar flow of the oil, being pumped by friction exerted by the shaft from the oil inlet to the outlet. The damming component is preferably made of a rubber-elastic material and may be fashioned in one piece with the sealing element.
Inventors
- 👤 Dietmar Franz
- 👤 Willi Schoneberger
- 👤 Gerd Upper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:20
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3204; F16J15/322; F16J15/162; F16J15/324
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
90 words
A shaft packing comprising two lip type sealing elements of a rubber-elastic material, a damming component between said two sealing elements, said damming component reducing free space between a shaft and the sealing elements over part of the shaft periphery to a slit which substantially blocks oil from flowing therethrough, and an oil passage at the remaining circumference at both ends of the damming component, the passage traversed by the oil providing a free space and being so shaped that laminar flow will reliably occur for a given shaft speed.
Claim 2
Dependent Claim
90 words
A shaft packing comprising two lip type sealing elements of a rubber-elastic material, a damming component between said two sealing elements, said damming component reducing free space between a shaft and the sealing elements over part of the shaft periphery to a slit which substantially blocks oil from flowing therethrough, and an oil passage at the remaining circumference at both ends of the damming component, the passage traversed by the oil providing a free space and being so shaped that laminar flow will reliably occur for a given shaft speed.
Claim 3
Dependent Claim
15 words
A shaft packing according to claim 1 wherein the damming component comprises an annular insert.
Claim 4
Dependent Claim
19 words
A shaft packing according to claim 1, comprising a damming component made in one piece with the sealing elements.
Claim 5
Dependent Claim
21 words
A shaft packing according to claim 3, comprising slits between the damming component and a packing washer of the sealing elements.
Claim 6
Dependent Claim
16 words
A shaft packing according to claim 1 wherein the damming component is made of rubber-elastic material.
Claim 7
Dependent Claim
28 words
A shaft packing according to claim 1 further comprising conducting tubes or bores connected to the oil passage, said tubes or bores being tangential to the shaft periphery.
Claim 8
Dependent Claim
20 words
A shaft packing according to claim 1 wherein the radial height of the free space does not exceed one-half inch.
Claim 9
Dependent Claim
20 words
A shaft packing according to claim 1 wherein the radial height of the free space does not exceed one-third inch.
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) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |