Patent US4221370A successfully refreshed from Google Patents.
US4221370A
Expired / Lapsed
US
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Obstetric chair
Assignee: Century Manufacturing Co
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Filing: 1978-03-20
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Granted: 1980-09-09
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Expires: 1998-03-20
Abstract
Abstract To support a patient in an obstetric chair positioned for the convenience of the physician, the patient-receiving portion of the chair is mounted for changes in elevation and for different attitudes and includes channel-like thigh supports which confine the thighs of the patient and a recessed seat portion for supporting the buttocks of the patient. The backrest is vertical to the seat portion and has a central section extending slightly forward with two recessed portions and an overhanging back portion to further confine the patient between curved side portions. The channel-like thigh supports may be adjusted in angle with respect to each other and the seat portion is cut away to permit access to the perineum.
Inventors
- 👤 Michael A. Redwine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:42
CPC Classifications
A; A61; A61G; A61G15/00; A61G15/005
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
159 words
An obstetric chair comprising: a seat portion; a backrest portion having a longitudinal axis; said longitudinal axis of said seat portion being at a substantial angle to said backrest portion whereby a patient is seated upright in said obstetric chair; said back rest position being cradle-shaped and curved to form side sections, whereby the torso of said patient is retrained from lateral movement; means for supporting the thighs of the patient; said means for supporting the thighs being channel shaped, whereby the thighs of said patient are restrained from lateral movement; said means for supporting the thighs being above said seat portion, whereby said patient is restrained from forward movement in said seat; said seat portion having a centrally located cut-away portion whereby said patient is supported by the buttocks and thighs on said obstetric chair; and said back rest portion including a central portion extending outwardly over said seat portion, whereby upward movement of said patient is restrained.
Claim 2
Dependent Claim
159 words
An obstetric chair comprising: a seat portion; a backrest portion having a longitudinal axis; said longitudinal axis of said seat portion being at a substantial angle to said backrest portion whereby a patient is seated upright in said obstetric chair; said back rest position being cradle-shaped and curved to form side sections, whereby the torso of said patient is retrained from lateral movement; means for supporting the thighs of the patient; said means for supporting the thighs being channel shaped, whereby the thighs of said patient are restrained from lateral movement; said means for supporting the thighs being above said seat portion, whereby said patient is restrained from forward movement in said seat; said seat portion having a centrally located cut-away portion whereby said patient is supported by the buttocks and thighs on said obstetric chair; and said back rest portion including a central portion extending outwardly over said seat portion, whereby upward movement of said patient is restrained.
Claim 3
Dependent Claim
35 words
An obstetric chair in accordance with claim 1 including means for moving said thigh supports to different angular positions with respect to said portion, whereby the patient's legs may be spread at a selected angle.
Claim 4
Dependent Claim
37 words
An obstetric chair in accordance with claim 2 further including stirrups having footrests at the end depending from said thigh supporting sections, whereby said patient's crus may be depended downwardly with the feet resting in said footrests.
Claim 5
Dependent Claim
31 words
An obstetric chair in accordance with claim 3 in which said means for moving said thigh supports includes a hand crank and a transmission gear means for moving said thigh supports.
Claim 6
Dependent Claim
48 words
An obstetric chair according to claim 1 in which the means for supporting the thighs of the patient in positions angularly spaced apart comprise two means for supporting the thighs of the patient positioned at an angle with respect to each other of between 75 and 90 degrees.
Claim 7
Dependent Claim
72 words
An obstetric chair according to claim 1 in which the seat portion is recessed to a level approximately 4 inches lower than the thigh-supporting portions; and the central portion of the backrest portion extends approximately 2 inches outwardly so as to force the back of the patient outwardly to a position above the recessed seat portion and the sides extend at least three inches outwardly to restrain the patient from lateral movement.
Claim 8
Dependent Claim
25 words
An obstetric chair according to claim 1 in which the seat portion is recessed to a level approximately 4 inches lower than the thigh-supporting portions.
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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) | 1983-09-09 | 1984-03-10 | 1984-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-09 | 1988-03-10 | 1988-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-09 | 1992-03-10 | 1992-09-09 | $7700.00 | Window Closed / Lapsed |