Patent US3694724A successfully refreshed from Google Patents.
US3694724A
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Vertical movement sensor
Assignee: ThyssenKrupp Budd Co
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Filing: 1970-09-29
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Granted: 1972-09-26
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Expires: 1990-09-29
Abstract
Abstract An automatic levelling system is provided for maintaining the relative position of two bodies. An extendible member movably mounted on one of the bodies is attached to the other body. Means including the extendible member are responsive to the relative movement between the two bodies to restore them to their original relative positions.
Inventors
- 👤 Walter S Eggert Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:54
CPC Classifications
B; B64; B64F; B64F1/00; B64F1/30; B64F1/305
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
141 words
An apparatus for maintaining a vehicle part such as a passenger ramp in a desired elevation with an aircraft frame portion, including, a. a horizontally extensible member mounted on a support by a vehicle, b. a vertical motion sensing apparatus carried by said horizontally extensible member, c. said motion sensing apparatus carrying a pair of vacuum cups adapted for horizontal engagement to the side of an aircraft, d. means for generating a vacuum for the interior of said vacuum cups, e. said vacuum cups being vertically spaced and rigidly secured relative to each other, whereby any deformation of one vacuum cup in a vertical direction is inhibited by the normal holding force of the other vacuum cup, f. whereby the horizontally extensible member is adapted to be held against the side of an aircraft by vacuum force of the vacuum cups.
Claim 2
Independent Claim
141 words
An apparatus for maintaining a vehicle part such as a passenger ramp in a desired elevation with an aircraft frame portion, including, a. a horizontally extensible member mounted on a support by a vehicle, b. a vertical motion sensing apparatus carried by said horizontally extensible member, c. said motion sensing apparatus carrying a pair of vacuum cups adapted for horizontal engagement to the side of an aircraft, d. means for generating a vacuum for the interior of said vacuum cups, e. said vacuum cups being vertically spaced and rigidly secured relative to each other, whereby any deformation of one vacuum cup in a vertical direction is inhibited by the normal holding force of the other vacuum cup, f. whereby the horizontally extensible member is adapted to be held against the side of an aircraft by vacuum force of the vacuum cups.
Claim 3
Dependent Claim
21 words
The apparatus of claim 1 wherein said motion sensing apparatus includes a pivoted arm whose outermost end carries said vacuum cups.
Claim 4
Dependent Claim
42 words
The apparatus of claim 1 wherein said motion sensing apparatus includes a horizontally disposed, reciprocating arm, which arm is in turn supported for vertical motion by a vertically reciprocating bar member, said vacuum cups carried by an end of said horizontal arm.
Claim 5
Dependent Claim
19 words
The apparatus of claim 2 including a flexible hose coupled from said vacuum cups to said vacuum generating means.
Claim 6
Dependent Claim
19 words
The apparatus of claim 3 including a flexible hose coupled from said vacuum cups to said vacuum generating means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |