US3984146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for actuating operational chairs
Assignee: Siemens AG
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Filing: 1972-02-10
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Granted: 1976-10-05
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Expires: 1992-02-10
Abstract
Abstract An operational chair for dental work is automatically actuated, preferably with hydraulic adjusting devices, in relation to the seat height, inclination of the back of the chair and the swinging of the chair about a transverse axis and possibly also about a longitudinal axis. Adjusting members are used for holding initial positions and bringing about the desired positions for each of the adjusting devices. The invention is particularly characterized by the provision of a group of members providing the required values for each position which can be selected. These members can be connected by a position selector, for example, a selecting key, with actuating means for the adjusting devices, the actuating means being firmly coupled with members holding the initial positions.
Inventors
- 👤 Erich Krestel
- 👤 Siegfried Herold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:38
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/04; G05B19/10; G05B19/102; G05B19/104; A; A61; A61G; A61G15/00; A61G15/02
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
330 words
An apparatus for a dental patient's chair comprising a base, a seat, a support member connected with said seat and said base for carrying said seat, a back, at least one horizontal axle extending transversely to the longitudinal axis of the chair through said back, means supporting said axle upon said support member, a position-adjusting device connected with said back and said means for swinging said back, a horizontal axle extending through said seat and carried by said means, a second position-adjusting device connected with said seat and said means for swinging said seat, an actual value transmitter comprising a feeler lever, a sheet metal part swingably connected with said feeler lever, means connecting said feeler lever and said sheet metal part to said back and said seat, whereby the relative positions of said feeler lever and said sheet metal part constitute a measure for the position of said back, an electrical comparator circuit having a rotary potentiometer connected with the last-mentioned means, said potentiometer being coupled with said feeler lever and having a value variable with the shifting of said feeler lever corresponding to the swinging of the back, said circuit also having a second rotary potentiometer for balance determination which is adjustable to a value corresponding to the desired inclined position of said seat and a regulator having an inlet for connecting to said potentiometers and an outlet, means connecting said outlet with said means for swinging said back, said regulator having means delivering a signal when a balance has been reached for switching off said position-adjusting device and for actuating said position-adjusting device when there is no balance to provide relative movement of said back until the first potentiometer is moved into the balancing position, a third position-adjusting device connected with said back and said support member for adjusting the height of said seat, a transmitter connected with said base, and driving and switching means connected with said base for adjusting said seat relatively to said base.
Claim 2
Independent Claim
330 words
An apparatus for a dental patient's chair comprising a base, a seat, a support member connected with said seat and said base for carrying said seat, a back, at least one horizontal axle extending transversely to the longitudinal axis of the chair through said back, means supporting said axle upon said support member, a position-adjusting device connected with said back and said means for swinging said back, a horizontal axle extending through said seat and carried by said means, a second position-adjusting device connected with said seat and said means for swinging said seat, an actual value transmitter comprising a feeler lever, a sheet metal part swingably connected with said feeler lever, means connecting said feeler lever and said sheet metal part to said back and said seat, whereby the relative positions of said feeler lever and said sheet metal part constitute a measure for the position of said back, an electrical comparator circuit having a rotary potentiometer connected with the last-mentioned means, said potentiometer being coupled with said feeler lever and having a value variable with the shifting of said feeler lever corresponding to the swinging of the back, said circuit also having a second rotary potentiometer for balance determination which is adjustable to a value corresponding to the desired inclined position of said seat and a regulator having an inlet for connecting to said potentiometers and an outlet, means connecting said outlet with said means for swinging said back, said regulator having means delivering a signal when a balance has been reached for switching off said position-adjusting device and for actuating said position-adjusting device when there is no balance to provide relative movement of said back until the first potentiometer is moved into the balancing position, a third position-adjusting device connected with said back and said support member for adjusting the height of said seat, a transmitter connected with said base, and driving and switching means connected with said base for adjusting said seat relatively to said base.
Claim 3
Dependent Claim
219 words
An apparatus in accordance with claim 1, wherein said seat has a swivelling axis extending transversely to the longitudinal direction of the chair, a position adjusting device for tilting the seat with respect to the base about this axis, said apparatus having a further reference input transmitter to provide signals corresponding to a desired tilting position of the seat, and a further actual value transmitter having a movable tracer joined to the seat for taking off the actual tilting position of the seat, the last-mentioned actual value transmitter providing signals corresponding to said actual tilting position of the seat, another differential amplifier having two inputs, means electrically connecting one of them with said further actual value transmitter and means electrically connecting the other one with the further reference input transmitter, said other differential amplifier providing signals on its output, means operatively connecting said output with the last-mentioned position adjusting device to transmit said signals to this position adjusting device for actuating it for tilting the seat, said apparatus having further switching means connecting said further reference input transmitter with the input of the corresponding amplifier which is inoperative when it receives equal signals from the transmitters, the direction in which the last-mentioned position adjusting device is actuated being dependent upon the polarity of the signals received by its amplifier.
Claim 4
Dependent Claim
219 words
An apparatus in accordance with claim 1 wherein said seat has a further tilting axle extending along the direction of the longitudinal axis of the chair, a position adjusting device for tilting the seat about said axle, the apparatus having a further reference input transmitter to provide signals corresponding to a desired tilting position of the seat and having a further actual value transmitter including a movable tracer joined to the seat for taking off the actual tilting position of the seat, said actual value transmitter providing signals corresponding to the actual tilting position of the seat, a further differential amplifier having two inputs, means electrically connecting one of said inputs with said actual transmitter and means connecting the other one with said reference input transmitter, said further differential amplifier having an output, means operatively connecting said output with the last-mentioned position adjusting device to transmit signals from the amplifier to the position adjusting device for actuating it for tilting the seat about the above mentioned axis, said apparatus having further switching means connecting said reference input transmitter with the input of the corresponding amplifier, the amplifier being inoperative when it receives equal signals from the transmitters, the direction in which the position adjusting device is actuated being dependent upon the polarity of the signals received by its amplifier.
Claim 5
Dependent Claim
125 words
An apparatus in accordance with claim 3, wherein each position adjusting device comprises a plurality of uniform actual value transmitters arranged in sets, each set corresponding to a preselected and preset chair position and containing a separate actual value transmitter of a position adjusting device, each actual value transmitter containing a separate switch, means connecting said switches with inputs of corresponding differential amplifiers, each set having a position selecting switch, a flip-flop stage having an inlet connected with the last-mentioned switch and an outlet, and a switch device connected with said outlet, said position selecting switch when actuated changing the switch condition of the flip-flop stage and producing a signal transmitted to said switch device which actuates switches when the position selecting switch is actuated.
Claim 6
Dependent Claim
88 words
An apparatus in accordance with claim 4, wherein each position adjusting device comprises two actuating members, one of said members shifting the position adjusting device in one direction and the other member shifting the position adjusting device in another direction, a separate UND stage having an outlet connected with a separate actuating member, a first inlet connected with an outlet of the corresponding differential amplifier and a second inlet connected with the outlet of the flip-flop stage and receiving a signal therefrom when its switch condition is changed.
Claim 7
Dependent Claim
31 words
An apparatus in accordance with claim 5, having an ODER member, the outlet of said flip-flop stage being connected by said ODER member with the second inlet of the UND stage.
Claim 8
Dependent Claim
59 words
An apparatus in accordance with claim 6, when the switches connecting the reference input transmitters with the corresponding differential amplifiers are relay switch contacts, the relays being connected with the outlet of the corresponding flip-flop stage and receiving from it signals when the position selecting switch is actuated and the flip-flop stage is moved to a different switch condition.
Claim 9
Dependent Claim
37 words
An apparatus in accordance with claim 7, wherein each reference input transmitter has a separate relay having a switch contact connected with the reference value transmitter and also connected with the inlet of the corresponding differential amplifier.
Claim 10
Dependent Claim
33 words
An apparatus in accordance with claim 8, having at least four sets of reference input transmitters, whereby one set of reference input transmitters provides a position for the getting out of the patient.
Claim 11
Dependent Claim
39 words
An apparatus in accordance with claim 9, wherein the sets of the reference input transmitters are in the form of removable units, one for each set, which can be placed one at a time in connection with the controllers.
Claim 12
Dependent Claim
23 words
An apparatus in accordance with claim 10, in which the reference input transmitters are combined to form a unit remote from the chair.
Claim 13
Dependent Claim
25 words
An apparatus in accordance with claim 11, in which the reference input transmitters are individually adjustable as regards the magnitudes of the signals they supply.
Claim 14
Dependent Claim
16 words
An apparatus in accordance with claim 12, in which the position adjusting devices are hydraulically operated.
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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) | 1979-10-05 | 1980-04-05 | 1980-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-05 | 1984-04-05 | 1984-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-05 | 1988-04-05 | 1988-10-05 | $7700.00 | Window Closed / Lapsed |