Patent US5174593A successfully refreshed from Google Patents.
US5174593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Camera dolly
Assignee: Leonard Studio Equipment Inc
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Filing: 1990-10-01
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Granted: 1992-12-29
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Expires: 2010-10-01
Abstract
Abstract A steering compensator has a shaft with a first shaft section offset from a central shaft section. A second shaft section of the shaft is offset from the first and central shaft sections. A first drive member is rotatably attached to the first shaft section and a second drive member is rotatably attached to the second shaft section. A central member is rotatably attached to the central shaft section between the first and second drive members. A pivotal link interconnects the first and second drive members through the central member to allow relative angular displacement between the first and second drive members. The steering compensator provides steering angle correction in conventional steering.
Inventors
- 👤 Leonard T. Chapman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:23
CPC Classifications
F; F16; F16M; F16M11/00; F16M11/42; F16M11/02; F16M11/04; F16M11/06; F16M11/08; F16M11/16; F16M11/18; F16M11/20; F16M11/24; F16M11/26; F16M11/28
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
91 words
A steering compensator comprising: a shaft having a first shaft section, a central shaft section offset from the first shaft section and a second shaft section offset from the first and central shaft sections; a first drive member rotatably attached to the first shaft section; a second drive member rotatably attached to the second shaft section; a central member rotatably attached to the central shaft section between the first and second drive members; and means for pivotally linking said first and second drive members to allow relative angular displacement between them.
Claim 2
Dependent Claim
91 words
A steering compensator comprising: a shaft having a first shaft section, a central shaft section offset from the first shaft section and a second shaft section offset from the first and central shaft sections; a first drive member rotatably attached to the first shaft section; a second drive member rotatably attached to the second shaft section; a central member rotatably attached to the central shaft section between the first and second drive members; and means for pivotally linking said first and second drive members to allow relative angular displacement between them.
Claim 3
Dependent Claim
31 words
The steering compensator of claim 1 further comprising a first drive member plate joined to the first drive member and a second drive member plate joined to the second drive member.
Claim 4
Dependent Claim
57 words
The steering compensator of claim 2 wherein said means for pivotally linking comprises a pin extending from a first slide block radially slidable in a groove in the first drive member plate, through a bore in the central member and connecting to a second slide block radially slidable in a groove in the second drive member plate.
Claim 5
Dependent Claim
20 words
The steering compensator of claim 2 wherein said first plate, second plate and are round and of approximately equal diameters.
Claim 6
Dependent Claim
13 words
The steering compensator of claim 1 wherein the central member comprises a disk.
Claim 7
Dependent Claim
17 words
The steering compensator of claim 1 wherein the first drive member and second drive member comprise sprockets.
Claim 8
Dependent Claim
21 words
The steering compensator of claim 6 wherein the first and second drive members are attached to the shaft with snap rings.
Claim 9
Dependent Claim
18 words
The steering compensator of claim 1 further comprising means for attaching the shaft to a camera dolly chassis.
Claim 10
Dependent Claim
89 words
A camera dolly having an adjustable steering angle corrector comprising: a shaft having first shaft section, a hub section, and a second shaft section, offset from each other; an eccentric collar pivotally supported on the first shaft section; a first drive member rotatably supported around the eccentric collar; a hub rotatably supported on the hub section; means for linking the eccentric collar and the hub; a second drive member rotatably supported on the second shaft section; and means for linking the first drive member and the second drive member.
Claim 11
Dependent Claim
89 words
A camera dolly having an adjustable steering angle corrector comprising: a shaft having first shaft section, a hub section, and a second shaft section, offset from each other; an eccentric collar pivotally supported on the first shaft section; a first drive member rotatably supported around the eccentric collar; a hub rotatably supported on the hub section; means for linking the eccentric collar and the hub; a second drive member rotatably supported on the second shaft section; and means for linking the first drive member and the second drive member.
Claim 12
Dependent Claim
14 words
The corrector of claim 9 further comprising a central plate fixed to the hub.
Claim 13
Dependent Claim
43 words
The corrector for claim 10 wherein the means for linking the first drive member and the second drive member comprises a pin extending through the central plate and interconnecting first and second sliding dogs slidably supported in the first and second drive members.
Claim 14
Dependent Claim
19 words
The corrector of claim 9 wherein the means for linking the eccentric collar and the hub comprises a pin.
Claim 15
Dependent Claim
14 words
The corrector of claim 9 further comprising a knob attached to the eccentric collar.
Claim 16
Dependent Claim
23 words
The camera dolly of claim 13 further comprising a dolly top deck and wherein the knob is positioned over the dolly top deck.
Claim 17
Dependent Claim
15 words
The corrector of claim 9 wherein the first and second drive members comprise toothed sprockets.
Claim 18
Dependent Claim
87 words
A camera dolly having a steering system including a steering compensator comprising: an offset shaft having an upper segment eccentrically attached to a center segment, and a lower segment eccentrically attached to the center segment opposite to the upper segment; an upper sprocket rotatably and concentrically attached around the upper segment; a center disk rotatably attached around the center segment; a lower sprocket rotatably and eccentrically attached around the lower segment; and a connecting link pivotably joining the upper sprocket and lower sprocket through the central disk.
Claim 19
Dependent Claim
87 words
A camera dolly having a steering system including a steering compensator comprising: an offset shaft having an upper segment eccentrically attached to a center segment, and a lower segment eccentrically attached to the center segment opposite to the upper segment; an upper sprocket rotatably and concentrically attached around the upper segment; a center disk rotatably attached around the center segment; a lower sprocket rotatably and eccentrically attached around the lower segment; and a connecting link pivotably joining the upper sprocket and lower sprocket through the central disk.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-12-29 | 1996-06-29 | 1996-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-12-29 | 2000-06-29 | 2000-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-12-29 | 2004-06-29 | 2004-12-29 | $7700.00 | Window Closed / Lapsed |