Patent US4329800A successfully refreshed from Google Patents.
US4329800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable display device
Assignee: Eastern Electrical Equipment Co Inc
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Filing: 1980-12-02
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Granted: 1982-05-18
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Expires: 2000-12-02
Abstract
Abstract A lightweight display device capable of vertical adjustment to desired height having a display frame attached to one end of a rod whose other end is formed with a pair of resilient arms having a plurality of teeth for the outer surface. The rod is positioned for ratchet-like vertical movement within a hollow tube having a threaded inner surface which engages with the teeth. The frame can be raised or lowered, along the length of the rod, by extending a vertical force thereto sufficient to deflect the arms of the rod away from the threads of the tube. When the vertical force is removed, the teeth re-engage with the threads to support the display frame at the desired height.
Inventors
- 👤 Bernard E. Shuman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:45
CPC Classifications
G; G09; G09F; G09F15/00; G09F15/0006; G09F15/0037; E; E01; E01F; E01F9/00; E01F9/60; E01F9/623; E01F9/65; F; F16; F16B; F16B7/00; F16B7/10; F16B7/105; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32254; Y10T403/32426; Y10T403/32442; Y10T403/32451
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
106 words
A vertically adjustable display device comprising: a base, a hollow tube having means at the bottom thereof for mounting to said base, a rod having a portion disposed within said tube, said tube having a plurality of threads formed on its interior, and said rod being formed with a pair of resilient arms at the bottom end thereof, said arms each having a plurality of teeth on the outer surface thereof for engagement with the threads on the interior of said tube for supporting and adjusting the height of said rod relative to said tube, and a display frame attached to this top of said rod.
Claim 2
Dependent Claim
106 words
A vertically adjustable display device comprising: a base, a hollow tube having means at the bottom thereof for mounting to said base, a rod having a portion disposed within said tube, said tube having a plurality of threads formed on its interior, and said rod being formed with a pair of resilient arms at the bottom end thereof, said arms each having a plurality of teeth on the outer surface thereof for engagement with the threads on the interior of said tube for supporting and adjusting the height of said rod relative to said tube, and a display frame attached to this top of said rod.
Claim 3
Dependent Claim
42 words
A display device as in claim 1, wherein application of sufficient vertical force on the rod causes the resilient arms to deflect the teeth away from the threads on the interior of the tube allowing the rod to be raised or lowered.
Claim 4
Dependent Claim
17 words
A display device as in claim 1, wherein the hollow tube is screw mounted to the base.
Claim 5
Dependent Claim
21 words
A display device as in claim 1, wherein the rod is screw mounted to the lower edge of the display frame.
Claim 6
Dependent Claim
21 words
A display device as in claim 1, wherein the display frame further comprises means for the insertion of a display message.
Claim 7
Dependent Claim
19 words
A display device as in claim 1, wherein the base, tube, rod and display frame are of plastic materials.
Claim 8
Dependent Claim
39 words
A display device as in claim 1, wherein the teeth on said resilient arms are formed as projections from the main portion of the rod and have a diameter greater than that of the main portion of the rod.
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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) | 1985-05-17 | 1985-11-16 | 1986-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-17 | 1989-11-16 | 1990-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-17 | 1993-11-16 | 1994-05-18 | $7700.00 | Window Closed / Lapsed |