Patent US3915429A successfully refreshed from Google Patents.
US3915429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dolly for use in cinematographic and television cameras with telescopic lifting arm
Assignee: Individual
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Filing: 1974-09-03
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Granted: 1975-10-28
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Expires: 1994-09-03
Abstract
Abstract The invention refers in general to moving carriages used in all industries which have lifting and depositing problems, and refers more particularly to an improved type of lifting arm for cinema and television ''''dollies,'''' with telescopic prolongation of the arm for progressive angular extrusion, and with automatic compensation of the angles of the camera support and operator''s seat.
Inventors
- 👤 Sante Zelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:15
CPC Classifications
B; B66; B66F; B66F11/00; B66F11/04; B66F11/048
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
226 words
A cinema and television dolly, for use in connection with a camera, comprising, in combination: a base; movable ground engaging means connected to said base and operative for making said base mobile; telescopic lifting means comprising rear and front elements and operative to be driveN to telescopically extend said front element with respect to said rear element; first connecting means slidably and pivotally connecting the lower end of said rear element to said base; driving means for said telescopic lifting means for extending said front element and rotating said telescopic lifting means with respect to said first connecting means; first support means having a surface for receiving said camera during the use of said dolly; second connecting means pivotally connecting said first support means to the top of said front element and movable therewith; second support means having a surface defining a seat for a person; third connecting means pivotally connecting said second support means to said front element and movable therewith; first control means connected to said first support means and operative to maintain said surface of said first support means substantially parallel to itself during movement of said telescopic lifting means; and second control means connected to said second support means and operative to maintain said seat surface of said second support means substantially parallel to itself during movement of said telescopic lifting means.
Claim 2
Dependent Claim
226 words
A cinema and television dolly, for use in connection with a camera, comprising, in combination: a base; movable ground engaging means connected to said base and operative for making said base mobile; telescopic lifting means comprising rear and front elements and operative to be driveN to telescopically extend said front element with respect to said rear element; first connecting means slidably and pivotally connecting the lower end of said rear element to said base; driving means for said telescopic lifting means for extending said front element and rotating said telescopic lifting means with respect to said first connecting means; first support means having a surface for receiving said camera during the use of said dolly; second connecting means pivotally connecting said first support means to the top of said front element and movable therewith; second support means having a surface defining a seat for a person; third connecting means pivotally connecting said second support means to said front element and movable therewith; first control means connected to said first support means and operative to maintain said surface of said first support means substantially parallel to itself during movement of said telescopic lifting means; and second control means connected to said second support means and operative to maintain said seat surface of said second support means substantially parallel to itself during movement of said telescopic lifting means.
Claim 3
Dependent Claim
148 words
The dolly as claimed in claim 1, wherein said driving means comprises a hydraulic jack connected between said rear element and said front element, first gear means pivotally connected to a pivot part of said rear element and having peripheral toothing and internal toothing; two arm means each pivotally connected near one end to said pivot part and near the other end to said base; second gear means pivotally connected to said front element; reversing gear roller means connected to said front element; and a predetermined length of chain having one end connected to the periphery of said first gear means to engage at least some of the teeth thereof, extending around said second gear means to engage at least some of the teeth thereof, and then around said reversing gear roller means, and having its other end connected to the inside toothing of said first gear means.
Claim 4
Dependent Claim
39 words
The dolly as claimed in claim 2, wherein the end runs of said chain are wound in the same direction of winding on the peripheral toothing and the inside toothing of said first gear means and are attached thereto.
Claim 5
Dependent Claim
50 words
The dolly as claimed in claim 1, wherein said first control means comprises an articulated parallelogram device including first arm means connected to said first support means, second arm means connected to said second gear means, and a rod articulated between the ends of said first and second arm means.
Claim 6
Dependent Claim
40 words
The dolly as claimed in claim 1, wherein said second control means comprises an articulated linkage device including arm means connected to said seat and pivotally connected to said first element, and a bar pivotally connected to said front element.
Claim 7
Dependent Claim
27 words
The dolly as claimed in claim 2, wherein the number of teeth of the peripheral teeth of said first and said second gear means are the same.
Claim 8
Dependent Claim
30 words
The dolly as claimed in claim 2, wherein the ratio between the number of teeth in the inside toothing and the peripheral toothing of said first gear means is 1:2.
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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |