US3738110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for driving a passive element according to a predetermined law of movement
Assignee: Automobiles Citroen SA
•
Filing: 1971-11-15
•
Granted: 1973-06-12
•
Expires: 1991-11-15
Abstract
Abstract The device comprises drive means adapted to move the passive element; programming means adapted to apply a theoretical law of movement to the passive element; detector means for the theoretical movement and detector means of the actual motion; comparator means adapted to deliver a signal depending on the separation existing between the theoretical and real movements detected by the said detector means; and means sensitive to said signal adapted to actuate the drive means so that the latter act in such a sense that the detected separation between the theoretical and real movements has a tendency to diminish. The detector means are grouped into a single apparatus having two mechanical members capable of moving, under the effect of linking means provided for this purpose, according to laws of movement reproducing the theoretical and real laws. The comparator means are directly sensitive to the separation between the respective positions of the two mechanical members and are composed of two parts respectively fixed rigidly on each of the mechanical members.
Inventors
- 👤 A Grosseau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:22
CPC Classifications
F; F15; F15B; F15B21/00; F15B21/02; F15B9/00; F15B9/02; F15B9/03; F16; F16H; F16H61/00; F16H61/38; F16H61/40; F16H61/46; F16H61/47; Y; Y10; Y10S; Y10S60/00; Y10S60/911
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
184 words
Device for driving a passive element according to a predetermined law of movement, comprising: drive means adapted to move the passive element; programming means adapted to apply a theoretical law of movement to the passive element; detector means for the theoretical movement and detector means of the actual motion; comparator means adapted to deliver a signal depending on the separation existing between the theoretical and real movements detected by said detector means; and means sensitive to said signal adapted to actuate the drive means so that the latter act in such a sense that the detected separation between the theoretical and real movements has a tendency to diminish, said detector means being grouped into a single apparatus having two mechanical members capable of moving, under the effect of linking means provided for this purpose, according to laws of movement reproducing, to a given factor, respectively said theoretical and real laws, and the comparator means being directly sensitive to the separation between the respective positions of the two mechanical members and being composed of two parts respectively fixed rigidly on each of said mechanical members.
Claim 2
Dependent Claim
184 words
Device for driving a passive element according to a predetermined law of movement, comprising: drive means adapted to move the passive element; programming means adapted to apply a theoretical law of movement to the passive element; detector means for the theoretical movement and detector means of the actual motion; comparator means adapted to deliver a signal depending on the separation existing between the theoretical and real movements detected by said detector means; and means sensitive to said signal adapted to actuate the drive means so that the latter act in such a sense that the detected separation between the theoretical and real movements has a tendency to diminish, said detector means being grouped into a single apparatus having two mechanical members capable of moving, under the effect of linking means provided for this purpose, according to laws of movement reproducing, to a given factor, respectively said theoretical and real laws, and the comparator means being directly sensitive to the separation between the respective positions of the two mechanical members and being composed of two parts respectively fixed rigidly on each of said mechanical members.
Claim 3
Dependent Claim
28 words
Device according to claim 1, for driving a passive element in translation, wherein the two mechanical members are adapted to move in translation with respect to one another.
Claim 4
Dependent Claim
31 words
Device according to claim 2, wherein one of the mechanical members is constituted by a sleeve while the other member is constituted by a rod adapted to slide in the sleeve.
Claim 5
Dependent Claim
34 words
Device according to claim 2, wherein the comparator means are constituted by a differential transformer having a core fast to one of the mechanical members anD a winding fast to the other mechanical member.
Claim 6
Dependent Claim
43 words
Device according to claim 2, wherein the programming means are constituted by a cam bearing directly on one of the mechanical members whilst the other mechanical member is moved by gear reduction means driven by drive means adapted to move the passive element.
Claim 7
Dependent Claim
75 words
Device according to claim 3, wherein the programming means are constituted by a cam bearing directly on one of the mechanical members whilst the other mechanical member is moved by gear reduction means driven by drive means adapted to move the passive element, and the gear reduction means comprise a screw, rotated by said drive means, adapted to drive in translation, in a direction parallel to its axis, by a finger provided on the sleeve.
Claim 8
Dependent Claim
41 words
Device according to claim 1, wherein the drive means adapted to move said element comprise a hydraulic motor supplied by a servo pump of which the delivery rate is governed by the value of the signal delivered by the comparator means.
Claim 9
Dependent Claim
25 words
Device according to claim 1, comprising safety means adapted to come into effect when the relative separation between the mechanical members reaches a predetermined value.
Claim 10
Dependent Claim
26 words
Device according to claim 2, wherein the drive means comprise a rack and pinion driving the rack, the latter being mechanically connected to the passive element.
Claim 11
Dependent Claim
24 words
Device according to claim 2, comprising hydraulic jacks adapted to serve as a stop, at the end of the stroke, for the passive element.
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) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |