Patent US4757970A successfully refreshed from Google Patents.
US4757970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balancing mechanism in pedestal carrying television camera
Assignee: Shotoku Ltd
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Filing: 1987-03-02
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Granted: 1988-07-19
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Expires: 2007-03-02
Abstract
Abstract A pedestal carrying a television camera and its accessories has constant-torque springs which are housed in a detachable housing. The output shaft of each constant-torque spring is made responsive to the weight of the camera and its accessories, and is connected via a reduction mechanism with a mechanism for winding up a line such as wire.
Inventors
- 👤 Shoji Nakazawa
- 👤 Naoki Ebimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 03:12
CPC Classifications
F; F16; F16M; F16M11/00; F16M11/20; F16M11/24; F16M11/26; F16M11/28; F16M11/02; F16M11/04; F16M11/06; F16M11/08; F16M11/18; F16M2200/00; F16M2200/04; F16M2200/048
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
124 words
In a device providing a pedestal-type support for objects of variable weight, said support being extensible and have a spring means operatively associated therewith in order to balance said weight when said pedestal is extended, the improvement comprising: a cassette housing substantially enclosing a spring of said spring means, said cassette housing being readily detachable from said device in order to provide for ease of assembly of said spring with and disassembly of said spring from operative engagement with said device and including an internally splined recess by which said spring means is driveably attachable to said pedestal-type support; and said spring means comprising at least one constant torque spring such that balancing of said weight is provided throughout complete extension of said support.
Claim 2
Dependent Claim
124 words
In a device providing a pedestal-type support for objects of variable weight, said support being extensible and have a spring means operatively associated therewith in order to balance said weight when said pedestal is extended, the improvement comprising: a cassette housing substantially enclosing a spring of said spring means, said cassette housing being readily detachable from said device in order to provide for ease of assembly of said spring with and disassembly of said spring from operative engagement with said device and including an internally splined recess by which said spring means is driveably attachable to said pedestal-type support; and said spring means comprising at least one constant torque spring such that balancing of said weight is provided throughout complete extension of said support.
Claim 3
Dependent Claim
42 words
The improvement as in claim 1, said weight balancing means further comprising: a reduction mechanism operatively associated with said spring and support in order to provide for a mechanical advantage and ease of connection and disconnection of said spring with said support.
Claim 4
Dependent Claim
39 words
The improvement as in claim 1, and further comprising: a line and reel operatively associated with said spring and said support in order to convert an output torque of said spring into a linear force for balancing said weight.
Claim 5
Dependent Claim
104 words
In a device providing a pedestal-type support for objects of variable weight, said support being extensible and have a spring means operatively associated therewith in order to balance said weight when said pedestal is extended, the improvement comprising: a cassette housing substantially enclosing a spring of said spring means, said cassette housing being readily detachable from said device in order to provide for ease of assembly of said spring with and disassembly of said spring from operative engagement with said device; and means in said cassette housing for releasably retaining and maintaining a selected energy stored in said spring during said assembly and disassembly.
Claim 6
Dependent Claim
104 words
In a device providing a pedestal-type support for objects of variable weight, said support being extensible and have a spring means operatively associated therewith in order to balance said weight when said pedestal is extended, the improvement comprising: a cassette housing substantially enclosing a spring of said spring means, said cassette housing being readily detachable from said device in order to provide for ease of assembly of said spring with and disassembly of said spring from operative engagement with said device; and means in said cassette housing for releasably retaining and maintaining a selected energy stored in said spring during said assembly and disassembly.
References Cited (Backward Citations)
US695001A
Cited
US2073998A
Cited
US2299251A
Cited
US2840333A
Cited
US3033316A
Cited
DE1127052B
Cited
US3003737A
Cited
US3151704A
Cited
US3154280A
Cited
US3622111A
Cited
US3895770A
Cited
US3890907A
Cited
US4478313A
Cited
US4447033A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-07-19 | 1992-01-18 | 1992-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-19 | 1996-01-18 | 1996-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-19 | 2000-01-18 | 2000-07-19 | $7700.00 | Window Closed / Lapsed |