US4139280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Head rest for ophthalmological examination
Assignee: Carl Zeiss AG
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Filing: 1976-07-07
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Granted: 1979-02-13
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Expires: 1996-07-07
Abstract
Abstract A head rest for instruments used for opthamological examination comprises two vertical columns mounted on the instrument base. Each of said columns carries a vertical post to which is attached a forehead rest spanning the space between the posts. Said posts are retracted with respect to said columns. Said columns also carry a transverse bar spanning the space between the columns and supporting a chin rest which is adjustable with respect to the base. The arrangement provides maximum freedom of movement around the patient's eyes for the physician or surgeon.
Inventors
- 👤 Kurt Kohler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:29
CPC Classifications
A; A61; A61B; A61B3/00; A61B3/0083
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
129 words
A head rest for an instrument used for ophthalmological examinations comprising two vertical columns mounted in spaced relation on the base of said instrument, a vertical post mounted on each of said vertical columns, a forehead rest mounted on said vertical posts and spanning the space therebetween, said posts being offset rearwardly from said columns, a transverse bar mounted on said columns and spanning the space therebetween, a chin rest mounted on said transverse bar, said chin rest being located in front of and offset from said posts, and means for elevating said transverse bar with respect to said columns, said elevating means comprising an elevating screw and nut mounted in one of said columns and a spindle which slides in a bearing in the other of said columns.
Claim 2
Dependent Claim
129 words
A head rest for an instrument used for ophthalmological examinations comprising two vertical columns mounted in spaced relation on the base of said instrument, a vertical post mounted on each of said vertical columns, a forehead rest mounted on said vertical posts and spanning the space therebetween, said posts being offset rearwardly from said columns, a transverse bar mounted on said columns and spanning the space therebetween, a chin rest mounted on said transverse bar, said chin rest being located in front of and offset from said posts, and means for elevating said transverse bar with respect to said columns, said elevating means comprising an elevating screw and nut mounted in one of said columns and a spindle which slides in a bearing in the other of said columns.
Claim 3
Dependent Claim
19 words
A head rest according to claim 1, and including a helical spring compressionally reacting between said base and spindle.
References Cited (Backward Citations)
US2999422A
Cited
US3594072A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-12 | 1982-08-14 | 1983-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-12 | 1986-08-14 | 1987-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-12 | 1990-08-14 | 1991-02-13 | $7700.00 | Window Closed / Lapsed |