Patent US4366985A successfully refreshed from Google Patents.
US4366985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable headrest for treatment chair
Assignee: Siemens Medical Solutions USA Inc
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Filing: 1981-02-13
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Granted: 1983-01-04
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Expires: 2001-02-13
Abstract
Abstract An adjustable headrest particularly adapted for a dental, medical or the like treatment chair wherein it is necessary to have a patient's head in various positions. A supporting arm preferably of the four-bar linkage type having a first end for being pivotally mounted on any suitable support for attachment to a treatment chair and a second end being pivotally mounted on a headrest for movement of the headrest which approximates the normal motion of the patient's head. Locking mechanism is attached to the headrest and supporting arm to lock the headrest in any desired position with the use of one hand of the operator.
Inventors
- 👤 Dennis F. Leffler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:37
CPC Classifications
A; A61; A61G; A61G15/00; A61G15/10; A61G15/12; A61G15/125; A47; A47C; A47C7/00; A47C7/36; A47C7/38
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
113 words
An adjustable headrest for dental, medical or the like treatment chairs comprising: a headrest; a support for attachment to a treatment chair; moveable arm means having a first end pivotally mounted on said support and a second end pivotally mounted on said headrest whereby movement of said headrest approximates the normal movement of the head of a patient; and locking means for said headrest including an activating member slideably mounted on said headrest said member being wedge-shaped at one end and a cam-shaped member mounted on said moveable arm and bias means normally urging said wedge-shaped portion of said member into engagement with said cam to lock said headrest in a desired position.
Claim 2
Dependent Claim
113 words
An adjustable headrest for dental, medical or the like treatment chairs comprising: a headrest; a support for attachment to a treatment chair; moveable arm means having a first end pivotally mounted on said support and a second end pivotally mounted on said headrest whereby movement of said headrest approximates the normal movement of the head of a patient; and locking means for said headrest including an activating member slideably mounted on said headrest said member being wedge-shaped at one end and a cam-shaped member mounted on said moveable arm and bias means normally urging said wedge-shaped portion of said member into engagement with said cam to lock said headrest in a desired position.
Claim 3
Dependent Claim
46 words
An adjustable headrest as set forth in claim 1 in which said moveable arm means comprises a four-bar linkage having two pairs of two bars oppositely disposed, wherein each pair is connected at one end to said support and at the other end to said headrest.
Claim 4
Dependent Claim
25 words
An adjustable headrest as set forth in claim 2 in which said two bars in each set are interconnected to produce an elongate single member.
Claim 5
Dependent Claim
32 words
An adjustable headrest as set forth in claim 1 wherein said bias means is a spring attached to said release and headrest so as to urge said release means towards said cam.
Claim 6
Dependent Claim
27 words
An adjustable headrest as set forth in claim 1 wherein said moveable arm means is attached to said headrest and to said support by parallel pivot pins.
Claim 7
Dependent Claim
37 words
An adjustable headrest as set forth in claim 1 including a headrest cushion secured to said headrest by a portion at the upper end thereof for providing a comfortable support for the head of the seated patient.
References Cited (Backward Citations)
US535783A
Cited
US945194A
Cited
US1576915A
Cited
US1531170A
Cited
US2434007A
Cited
US2586417A
Cited
US2666476A
Cited
US3692356A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-03 | 1986-07-05 | 1987-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-03 | 1990-07-05 | 1991-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-03 | 1994-07-05 | 1995-01-04 | $7700.00 | Window Closed / Lapsed |