US4653734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic vibration damper for resilient bearings in motor vehicles
Assignee: ZF Lemfoerder GmbH
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Filing: 1984-12-26
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Granted: 1987-03-31
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Expires: 2004-12-26
Abstract
Abstract A hydraulic vibration damper is intended for resilient bearings in motor vehicles and comprises in a housing an inner space which is divided by a partition into a working space above and a lower equalization space, with the two spaces being connected to each other by flow apertures in the partition and their volumes being variable. The partition encloses a horizontal flow channel communicating with the working space and the equalizing space, respectively, through connecting holes which are offset relative to each other. In addition, valve apertures with closing bodies are provided in the partition, which close automatically under increased pressure in the working space.
Inventors
- 👤 Ernst-Gunter Jordens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:21
CPC Classifications
F; F16; F16F; F16F13/00; F16F13/04; F16F13/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
307 words
A hydraulic vibration damper for resilient bearings of motor vehicles, comprising a housing having a hollow interior forming a liquid space, a partition wall assembly extending across said liquid space and dividing said liquid space into an upper working space and a lower equalizing space, flexible case means at least partly bounding said working space and said equalizing space for permitting changes in volume of said working and equalizing spaces, said partition wall assembly having a horizontally extending liquid flow space therein with a first kidney-shaped opening to said upper working space and a second kidney-shaped opening to said equalizing space, said first and second openings being offset at opposite sides of said partition wall assembly and on opposite sides of said horizontally extending liquid flow space, said partition wall assembly also having at least one first valve aperture communicating with said working space and at least one second valve aperture communicating with said equalizing space, and a closing member associated with said valve apertures to close one of said valve apertures upon a relatively large pressure increase in said working space so that liquid can flow from said working space to said equalizing space only through said first and second openings and across said horizontally extending liquid flow space, a relatively smaller pressure increase in said working space influencing said closing member to allow passage of liquid through said one valve aperture, said first and second valve apertures being vertically aligned with each other, said closing member comprising a ball float movable between said first and second valve apertures, said ball float being normally engaged with said first valve aperture and being moved downwardly upon occurrence of pressure in said working space, a large pressure increase in said working space causing said ball float to engage said second valve aperture to close said second valve aperture.
Claim 2
Dependent Claim
307 words
A hydraulic vibration damper for resilient bearings of motor vehicles, comprising a housing having a hollow interior forming a liquid space, a partition wall assembly extending across said liquid space and dividing said liquid space into an upper working space and a lower equalizing space, flexible case means at least partly bounding said working space and said equalizing space for permitting changes in volume of said working and equalizing spaces, said partition wall assembly having a horizontally extending liquid flow space therein with a first kidney-shaped opening to said upper working space and a second kidney-shaped opening to said equalizing space, said first and second openings being offset at opposite sides of said partition wall assembly and on opposite sides of said horizontally extending liquid flow space, said partition wall assembly also having at least one first valve aperture communicating with said working space and at least one second valve aperture communicating with said equalizing space, and a closing member associated with said valve apertures to close one of said valve apertures upon a relatively large pressure increase in said working space so that liquid can flow from said working space to said equalizing space only through said first and second openings and across said horizontally extending liquid flow space, a relatively smaller pressure increase in said working space influencing said closing member to allow passage of liquid through said one valve aperture, said first and second valve apertures being vertically aligned with each other, said closing member comprising a ball float movable between said first and second valve apertures, said ball float being normally engaged with said first valve aperture and being moved downwardly upon occurrence of pressure in said working space, a large pressure increase in said working space causing said ball float to engage said second valve aperture to close said second valve aperture.
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) | 1990-03-30 | 1990-09-29 | 1991-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-30 | 1994-09-29 | 1995-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-30 | 1998-09-29 | 1999-03-31 | $7700.00 | Window Closed / Lapsed |