Patent US4112993A successfully refreshed from Google Patents.
Patent US3885831A successfully refreshed from Google Patents.
US3885831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Close-coupled articulating headrest
Assignee: Individual
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Filing: 1974-01-24
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Granted: 1975-05-27
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Expires: 1994-01-24
Abstract
Abstract An articulating headrest for treatment chairs such as dental chairs, to adapt such chairs for use in procedures with the dentist seated. An adapter bracket mounts the headrest to the existing structure of the chair and slideably receives a tongue member which bears the balance of the headrest. A link is pivotally attached both to the upper end of the tongue and to a cushion support plate carrying a cushion for the patient''s head, and both pivot points are clamped by a single clamp mechanism. The combined motions of sliding the tongue in the bracket and pivoting the cushion support plate and the link about the pivot points allow selection of a wide variety of headrest positions for upper jaw work, pediatric dentistry, X-ray, and procedures with the dentist seated and the patient reclining.
Inventors
- 👤 Keith O Rasmussen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:08
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/36; A47C7/38; A61; A61G; A61G15/00; A61G15/10; A61G15/12; A61G15/125; A61G2210/00; A61G2210/50
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
94 words
A close-coupled articulating headrest system for treatment chairs and the like, comprising a tongue member adapted for longitudinally adjustable engagement with the back of the chair, a link member pivotally attached at one end thereof to said tongue member, a dished cushion support plate pivotally attached adjacent the upper edge thereof to the end of said link member opposite said tongue member, and overcenter toggle clamp means adapted for simultaneous releasable locking of pivotal motion of said link member both with respect to said tongue member and with respect to said cushion support plate.
Claim 2
Dependent Claim
94 words
A close-coupled articulating headrest system for treatment chairs and the like, comprising a tongue member adapted for longitudinally adjustable engagement with the back of the chair, a link member pivotally attached at one end thereof to said tongue member, a dished cushion support plate pivotally attached adjacent the upper edge thereof to the end of said link member opposite said tongue member, and overcenter toggle clamp means adapted for simultaneous releasable locking of pivotal motion of said link member both with respect to said tongue member and with respect to said cushion support plate.
Claim 3
Dependent Claim
55 words
A close-coupled articulating headrest system as described in claim 1 and wherein said link member is attached to said tongue member adjacent the pivotal end of said tongue member, the distal portion of said tongue member being engageable with the back of the chair and having a retaining means thereon for locking said longitudinal adjustment.
Claim 4
Dependent Claim
70 words
A close-coupled articulating headrest system as described in claim 1 and wherein said clamp means comprises a unitary mechanism having a clamp handle operative to clamp both pivotal motions by a single motion of the clamp handle to a clamping position lying flat against said link member, said clamp means being formed so that said clamp handle projects angularly away from said link member when said clamp means is released.
Claim 5
Dependent Claim
68 words
A close-coupled articulating headrest system as described in claim 3 and wherein said clamp means includes split bearings as the pivotal attachment of said link member to said tongue member and the pivotal attachment between said tongue member and said cushion support plate, a tension rod connected between said split bearings simultaneously, said tension rod being operatively connected to said clamp handle for clamping and unclamping movement thereby.
Claim 6
Dependent Claim
46 words
A close-coupled articulating headrest system as described in claim 4 and wherein said split bearings are formed integrally in the opposite ends of said link member, and said split bearings are journaled on pins secured against rotation in said tongue member and said cushion support plate.
Claim 7
Dependent Claim
41 words
A close-coupled articulating headrest system as described in claim 1 and wherein the axis of pivotal motion of said cushion support plate with respect to said link member is located adjacent the plane in which said cushion support plate generally lies.
Claim 8
Dependent Claim
76 words
A close-coupled articulating headrest system as described in claim 6 and wherein the end of said link member attached to said cushion support plate is curved forward toward said cushion support plate and said cushion support plate has relieved areas thereon cooperative with said link member, whereby the axis of pivotal motion between said link member and said cushion support plate is brought into close juxtaposition with the plane generally occupied by said cushion support plate.
Claim 9
Dependent Claim
35 words
A close-coupled articulating headrest system as described in claim 1 and wherein the axis of pivotal motion of said link member with respect to said tongue member is adjustably disposable adjacent said cushion support plate.
Claim 10
Dependent Claim
56 words
A close-coupled articulating headrest system as described in claim 8 and wherein the end of said link member attached to said tongue member is curved forward in the direction to bring it toward the cushion support plate when that plate is disposed adjacent the axis of pivotal motion between said link member and said tongue member.
Claim 11
Dependent Claim
69 words
A close-coupled articulating headrest system as described in claim 8 and wherein the pivotal end of said tongue member is attached to a bracket which is in turn pivotally connected to said link member, said bracket being curved forward in the direction to bring it toward the cushion support plate when that plate is disposed adjacent the axis of pivotal motion between said link member and said tongue member.
Claim 12
Dependent Claim
41 words
A close-coupled articulating headrest system as described in claim 8 and wherein the axis of pivotal motion of said cushion support plate with respect to said link member is located adjacent the plane in which said cushion support plate generally lies.
Claim 13
Dependent Claim
152 words
A close-coupled articulating headrest system as described in claim 11 and wherein the end of said link member attached to said cushion support plate is curved forward toward said cushion support plate and said cushion support plate has relieved areas thereon cooperative with said link member to bring the axis of pivotal motion therebetween into close juxtaposition with the plane generally occupied by said cushion support plate, and the pivotal end of said tongue member is attached to a bracket which is in turn pivotally connected to said link member, said bracket and the end of said link member attached to said bracket both being curved forward in the direction to bring them toward the cushion support plate when that plate is disposed adjacent the axis of pivotal motion between said link member and said tongue member, said headrest system further comprises a flattened head cushion attachable to said cushion support plate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |