US4217009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dental cabinet appliance
Assignee: Sybron Transition Corp
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Filing: 1978-12-20
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Granted: 1980-08-12
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Expires: 1998-12-20
Abstract
Abstract A dental unit capable of positioning dental instruments at a location convenient to either a seated or standing dentist. The unit has the instrument holder mounted on a four-bar linkage for swinging the holder from a relatively low stored position to an in-use position. At a low point of the swing, the dental instruments are at a relatively low position and convenient to a seated dentist. The four-bar linkage is arranged so that at a higher point in the swing, the instrument holder is thrust to a relatively high position as may be convenient to a standing dentist.
Inventors
- 👤 Edwin Suter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 04:02
CPC Classifications
A; A61; A61G; A61G15/00; A61G15/14; A61G15/16
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
157 words
A dental unit comprising: (a) a cabinet having side walls and an open front; (b) an instrument holder for releasably supporting a plurality of dental instruments, said holder being movable from a stored position within said cabinet through said open front to an in-use position; (c) a four-bar linkage connecting said instrument holder to said cabinet side walls including a pair of lever arms each pivotally connected at a first end to said side wall and each pivotally connected at a second end to said instrument holder for swinging said instrument holder in a vertical plane out and up from a first, relatively low storage position in said cabinet, to a second, in-use position outside of said cabinet; and (d) said lever arms having their second ends spaced further apart than said first ends to rotate said instrument holder in a direction towards said lever arms as said lever arms swing said holder to an in-use position.
Claim 2
Dependent Claim
157 words
A dental unit comprising: (a) a cabinet having side walls and an open front; (b) an instrument holder for releasably supporting a plurality of dental instruments, said holder being movable from a stored position within said cabinet through said open front to an in-use position; (c) a four-bar linkage connecting said instrument holder to said cabinet side walls including a pair of lever arms each pivotally connected at a first end to said side wall and each pivotally connected at a second end to said instrument holder for swinging said instrument holder in a vertical plane out and up from a first, relatively low storage position in said cabinet, to a second, in-use position outside of said cabinet; and (d) said lever arms having their second ends spaced further apart than said first ends to rotate said instrument holder in a direction towards said lever arms as said lever arms swing said holder to an in-use position.
Claim 3
Dependent Claim
32 words
A dental unit as in claim 1 including a tension spring between said cabinet and the second ends of said lever arms for holding said linkage at either of its end positions.
Claim 4
Dependent Claim
34 words
A dental unit as in claim 2 including friction means between said four-bar linkage and said side walls to maintain said instrument holder in an intermediate position against the bias of said tension spring.
Claim 5
Dependent Claim
32 words
A dental unit as in claim 1 including a link extending between and pivotally connected to said second ends of said lever arms, said instrument holder being an extension of said link.
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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) | 1983-08-12 | 1984-02-11 | 1984-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-12 | 1988-02-11 | 1988-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-12 | 1992-02-11 | 1992-08-12 | $7700.00 | Window Closed / Lapsed |