US3866973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental patients chair with automatic actuation
Assignee: Siemens AG
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Filing: 1973-10-17
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Granted: 1975-02-18
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Expires: 1993-10-17
Abstract
Abstract A dental patients'' chair has an upper part consisting of an adjustable seat and an adjustable back, a carrier supporting the upper part, a carrying arm used for adjusting the height of the upper part which is swingably connected with the carrier and is connected with a base, devices for adjusting the seat and the back and an electrical steering device for the adjusting devices for automatically providing preselected and adjustable positions of the seat and back. The invention is particularly characterized in that constructional parts of the steering device are located upon a preferably common supporting part in or at the carrier supporting the upper part and are covered by a removable covering.
Inventors
- 👤 Erich Heubeck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:09
CPC Classifications
A; A61; A61G; A61G15/00; A61G15/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
165 words
A dental patients'' chair, comprising a chair upper part having an adjustable seat and an adjustable back, a carrier supporting said upper part, a base, a parallelogram carrying arm connected with said carrier and said base for adjusting the height of said upper part, devices for shifting said seat and said back, an electrical actuating device for said shifting devices, said actuating device comprising a rotary potentiometer constituting an actual value transmitter and having an axle and a key finger connected with said axle, said finger having a free end engaging the part of said parallelogram arm connected with said carrier and changing its position when the height position of the seat is changed for the purpose of detecting the change of the seat position relatively to the base, a value transmitter, a setting member connected with the last-mentioned transmitter to preset a selected position for the seat and a supporting part arranged on said carrier and carrying the last-mentioned transmitter and said setting member.
Claim 2
Dependent Claim
165 words
A dental patients'' chair, comprising a chair upper part having an adjustable seat and an adjustable back, a carrier supporting said upper part, a base, a parallelogram carrying arm connected with said carrier and said base for adjusting the height of said upper part, devices for shifting said seat and said back, an electrical actuating device for said shifting devices, said actuating device comprising a rotary potentiometer constituting an actual value transmitter and having an axle and a key finger connected with said axle, said finger having a free end engaging the part of said parallelogram arm connected with said carrier and changing its position when the height position of the seat is changed for the purpose of detecting the change of the seat position relatively to the base, a value transmitter, a setting member connected with the last-mentioned transmitter to preset a selected position for the seat and a supporting part arranged on said carrier and carrying the last-mentioned transmitter and said setting member.
Claim 3
Dependent Claim
90 words
A dental patients'' chair according to claim 1, comprising a rotary potentiometer constituting an actual value transmitter having an axle and a key finger connected with said axle, and a rod connected with said back, said finger having a free end engaging said rod for detecting the change of seat and back positions relatively to said carrier, a value transmitter and a setting member connected with the last-mentioned transmitter to preset a selected position for the back, the last-mentioned transmitter and said setting member being carried by said supporting part.
Claim 4
Dependent Claim
30 words
A dental patients'' chair according to claim 1, comprising means for adjusting said finger, and wherein said supporting part carries the first-mentioned transmitter and said means for adjusting said finger.
Claim 5
Dependent Claim
31 words
A dental patients'' chair according to claim 3, wherein said electrical actuating device has current supplying means, said supporting part having a plug strip connecting it with said current supplying means.
Claim 6
Dependent Claim
28 words
A dental patients'' chair according to claim 4, comprising a covering, said supporting part and at least a part of said current-supplying means being carried by said covering.
Claim 7
Dependent Claim
17 words
A dental patients'' chair according to claim 5, wherein said covering is swingably connected to said carrier.
Claim 8
Dependent Claim
14 words
A dental patients'' chair according to claim 6, having a cap over said covering.
Claim 9
Dependent Claim
32 words
A dental patients'' chair according to claim 7, wherein said carrier is box-shaped and has a front side adjacent the back, said supporting part and said covering being located at said side.
References Cited (Backward Citations)
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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) | 1978-02-17 | 1978-08-19 | 1979-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-17 | 1982-08-19 | 1983-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-17 | 1986-08-19 | 1987-02-18 | $7700.00 | Window Closed / Lapsed |