US3777625A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pneumatic servomotor
Assignee: Daimler Benz AG
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Filing: 1971-05-14
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Granted: 1973-12-11
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Expires: 1991-05-14
Abstract
Abstract A pneumatic servo-motor, especially an adjusting motor for flaps or other reciprocable structural parts in motor vehicles, which is equipped with at least one diaphragm closing off a working space for the pneumatic medium and mechanically connected with a shifting rod abutting in the working space against the diaphragm; the diaphragm is provided centrally thereof with a disk-like thickened portion which abuts either directly at the shifting rod extending through the same or abuts at a cylindrical extension provided at the abutment disk for the fastening of the shifting rod and thereby assures an effective seal without any additional means.
Inventors
- 👤 R Andres
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:17
CPC Classifications
F; F15; F15B; F15B15/00; F15B15/08; F15B15/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
A pneumatic servo-motor of the double acting type which includes two diaphragm means each provided with a central opening, each closing off a respective working space for a pneumatic medium comprising: a substantially disk-shaped thickened portion on each of said diaphragms extending around the circumference of the central opening exteriorly of the respective working space; a substantially flat disk means provided for each of said diaphragm means, disposed centrally of and abutting each of said diaphragm means in the respective working space, having a cylindrical extension means integral therewith extending through the central opening of the respective diaphragm means; one shifting rod means being mechanically connected with a respective abutment disk means; an entrainment member operatively connecting with each other the two shifting rod means to provide the double acting operation of the pneumatic servo-motor; said entrainment member being provided with two eye portions disposed about said extensions provided on said abutment disk means; and threaded means securing said shifting rod means to said extensions and holding the eye portions in place.
Claim 2
Dependent Claim
172 words
A pneumatic servo-motor of the double acting type which includes two diaphragm means each provided with a central opening, each closing off a respective working space for a pneumatic medium comprising: a substantially disk-shaped thickened portion on each of said diaphragms extending around the circumference of the central opening exteriorly of the respective working space; a substantially flat disk means provided for each of said diaphragm means, disposed centrally of and abutting each of said diaphragm means in the respective working space, having a cylindrical extension means integral therewith extending through the central opening of the respective diaphragm means; one shifting rod means being mechanically connected with a respective abutment disk means; an entrainment member operatively connecting with each other the two shifting rod means to provide the double acting operation of the pneumatic servo-motor; said entrainment member being provided with two eye portions disposed about said extensions provided on said abutment disk means; and threaded means securing said shifting rod means to said extensions and holding the eye portions in place.
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) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |