Patent US3826531A successfully refreshed from Google Patents.
US3826531A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental chair
Assignee: Individual
•
Filing: 1972-05-15
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Granted: 1974-07-30
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Expires: 1992-05-15
Abstract
Abstract The patient-supporting structure of the chair is carried on a vertically adjustable platform which rides up and down on a laterally displaced post; the platform is kept level by vertically spaced opposed rollers riding on vertical tracks formed on the post, there being two sets of rollers acting in planes at right angles to each other so that lateral displacement and angular movement are prevented. The platform may move down practically to floor level. An instrument console is mounted for horizontal pivoting and vertical sliding on an offset shaft and has a lost motion connection to the platform so that it follows it only in the upper part of its adjustment range.
Inventors
- 👤 R Page
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:31
CPC Classifications
A; A61; A61G; A61G15/00
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
109 words
A dental operating chair having a patient-supporting superstructure and height-adjusting support for said superstructure, characterized in that the support comprises a post positioned to one side of the superstructure, a carriage vertically moveable on said post and having bracket means extending under the superstructure to support the same on the carriage, and a vertical motor-driven screw drive for the carriage said post having rails in two sets of spaced parallel vertical planes, the planes of the two sets being at right angles to each other, and the carriage having upper rollers running on a plane of each set and lower rollers running on the remaining plane of each set.
Claim 2
Dependent Claim
109 words
A dental operating chair having a patient-supporting superstructure and height-adjusting support for said superstructure, characterized in that the support comprises a post positioned to one side of the superstructure, a carriage vertically moveable on said post and having bracket means extending under the superstructure to support the same on the carriage, and a vertical motor-driven screw drive for the carriage said post having rails in two sets of spaced parallel vertical planes, the planes of the two sets being at right angles to each other, and the carriage having upper rollers running on a plane of each set and lower rollers running on the remaining plane of each set.
Claim 3
Dependent Claim
51 words
A dental operating chair according to claim 1, in which the said rollers running on the rails of a said set are free to move laterally along with thE carriage in the plane of said set, and restrained from such lateral movement by the rollers engaging the other set of rails.
Claim 4
Dependent Claim
92 words
A dental operating chair having a patient-supporting superstructure and height-adjusting support for said superstructure, characterized in that the support comprises a post positioned to one side of the superstructure, a carriage vertically moveable on said post and having bracket means extending under the superstructure to support the same on the carriage, a vertical motor-driven screw drive for the carriage, a vertical shaft adjacent said post, a dental console mounted for sliding vertically of said shaft and means connecting said to of said carriage for moving the console vertically along with the carriage.
Claim 5
Dependent Claim
92 words
A dental operating chair having a patient-supporting superstructure and height-adjusting support for said superstructure, characterized in that the support comprises a post positioned to one side of the superstructure, a carriage vertically moveable on said post and having bracket means extending under the superstructure to support the same on the carriage, a vertical motor-driven screw drive for the carriage, a vertical shaft adjacent said post, a dental console mounted for sliding vertically of said shaft and means connecting said to of said carriage for moving the console vertically along with the carriage.
Claim 6
Dependent Claim
53 words
A dental operating chair according to claim 3, in which the means connecting the console to the carriage comprises a lost motion connection, whereby the console follows the carriage during its movement within an upper range of positions but remains at set level while the carriage moves in a lower range of positions.
Claim 7
Dependent Claim
44 words
A dental operating chair according to claim 4, in which the post is located toward the foot end of the superstructure and the console is supported for pivoting on an axis adjacent the post and on the far side thereof from the chair superstructure.
Claim 8
Dependent Claim
30 words
A dental operating chair according to claim 2, in which the post has a hollow rectangular cross-section and the said rails are in the four planar faces of the post.
Claim 9
Dependent Claim
96 words
A dental operating chair according to claim 6, in which the said post comprises an upper support for the said screw drive and spaced vertically extending walls forming an open sided housing therefore and included within the said carriage, the screw drive comprising a vertical screw suspended from said upper support, a nut on said screw and movable vertically by rotation thereof, a bracket fixed to the carriage and extending over said nut in abutting relation thereto and flexible means closing off the open side of said housing while permitting vertical movement of said last-mentioned bracket.
Claim 10
Dependent Claim
37 words
A dental operating chair according to claim 7, in which the said last-mentioned bracket comprises a narrow web section and the said flexible means comprises a pair of flexible strips substantially meeting above and below the same.
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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) | 1977-07-29 | 1978-01-28 | 1978-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-07-29 | 1982-01-28 | 1982-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-07-29 | 1986-01-28 | 1986-07-30 | $7700.00 | Window Closed / Lapsed |