US3903871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ophthalmodynamometer
Assignee: United States Department of the Navy
•
Filing: 1974-05-01
•
Granted: 1975-09-09
•
Expires: 1994-05-01
Abstract
Abstract A portable ophthalmodynamometer, which operates in the active compression mode, includes a transparent plastic eyecup or speculum attached to a bellows-like bladder having glass endwalls. The eyecup fits under the eyelids and is seated against the sclera by a headstrap attached to the bladder structure and secured around the head. An integral adjustment gauge facilitates correct positioning of the ophthalmodynamometer on the eyeball. An air duct extends from the interior of the bladder structure to a hand squeeze bulb whereby manipulation of the bulb increases the internal pressure of the bladder structure. Increasing bladder pressure is transmitted to the eyeball via the eyecup to thereby raise intra-ocular pressure. Bladder pressure is related to retinal artery blood pressure. Means are provided to ascertain the bladder pressure so that retinal artery blood pressure may be determined.
Inventors
- 👤 Gloria T Chisum
- 👤 John Nichparenko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:43
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/02; A61B5/021; A61B5/022; A61B3/00; A61B3/10; A61B3/12; A61B5/02216
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
117 words
An ophthalmodynamometer comprsiing: a speculum member having an opening formed by two oppositely flaring surfaces of revolution, one of said surfaces being formed to fit against the sclera of thE eye beneath the upper and lower eyelids; a bladder member attached to the other of said surfaces for transmitting a force to said speculum member, said bladder member having a transparent portion concentric with said speculum opening; first means attached to said bladder member for securing said one surface against the sclera; second means operatively connected to said bladder member for varying the internal pressure of said bladder member; and third means operatively connected to said bladder member for monitoring the internal pressure of said bladder member.
Claim 2
Dependent Claim
117 words
An ophthalmodynamometer comprsiing: a speculum member having an opening formed by two oppositely flaring surfaces of revolution, one of said surfaces being formed to fit against the sclera of thE eye beneath the upper and lower eyelids; a bladder member attached to the other of said surfaces for transmitting a force to said speculum member, said bladder member having a transparent portion concentric with said speculum opening; first means attached to said bladder member for securing said one surface against the sclera; second means operatively connected to said bladder member for varying the internal pressure of said bladder member; and third means operatively connected to said bladder member for monitoring the internal pressure of said bladder member.
Claim 3
Dependent Claim
25 words
An ophthalmodynamometer according to claim 1 wherein said bladder member includes: a closed tube having a corrugated sidewall attached to first and second transparent endwalls.
Claim 4
Dependent Claim
63 words
An ophthalmodynamometer according to claim 2 further including: at least one head strap; means attached to said first endwall for securing said head strap to said bladder member; an adjustment gage; retaining means attached to said second endwall for securing said adjustment gage to said bladder member, said retaining means including means integral therewith for securing said speculum member to said bladder member.
Claim 5
Dependent Claim
107 words
An ophthalmodynamometer comprising: a substantially cylindrical bladder having a pleated sidewall attached to first and second transparent disc-shaped endwalls; a keeper attached to said first endwall; a mounting ring attached to said second endwall; an eyecup member attached to said keeper, said eyecup member having a viewing port concentric with said transparent disc-shaped endwalls; an adjustment gauge attached to said keeper; and a tube having a first end portion extending through said mounting ring and said second endwall, and a second end portion serially connected to a normally closed exhaust valve, a squeeze bulb and a pressure indicator means connected in parallel with respect to each other.
Claim 6
Dependent Claim
107 words
An ophthalmodynamometer comprising: a substantially cylindrical bladder having a pleated sidewall attached to first and second transparent disc-shaped endwalls; a keeper attached to said first endwall; a mounting ring attached to said second endwall; an eyecup member attached to said keeper, said eyecup member having a viewing port concentric with said transparent disc-shaped endwalls; an adjustment gauge attached to said keeper; and a tube having a first end portion extending through said mounting ring and said second endwall, and a second end portion serially connected to a normally closed exhaust valve, a squeeze bulb and a pressure indicator means connected in parallel with respect to each other.
Claim 7
Dependent Claim
90 words
An ophthalmodynamometer comprising: first means for applying force over a predetermined area of an eyeball; a bladder member attached to said first means, said bladder member having a transparent portion through which said eyeball may be observed; second means operatively connected to said bladder member for varying the internal pressure of said bladder member; third means operatively connected to said bladder member for monitoring the internal pressure of said bladder member; at least one head strap attached to said bladder member; and an adjustment gage attached to said bladder member.
Claim 8
Dependent Claim
90 words
An ophthalmodynamometer comprising: first means for applying force over a predetermined area of an eyeball; a bladder member attached to said first means, said bladder member having a transparent portion through which said eyeball may be observed; second means operatively connected to said bladder member for varying the internal pressure of said bladder member; third means operatively connected to said bladder member for monitoring the internal pressure of said bladder member; at least one head strap attached to said bladder member; and an adjustment gage attached to said bladder member.
Claim 9
Dependent Claim
78 words
An ophthalmodynamometer according to claim 5 wherein said bladder member includes: a hollow substantially cylindrical bladder having a corrugated sidewall attached to first and second transparent disc shaped endwalls; a mounting ring attached to said first endwall and having at least one head strap lug thereon for receiving said head strap; and a keeper attached to said endwall for supporting said adjustment gage, said keeper including attachment means integral therewith for securing said first means to said keeper.
Claim 10
Dependent Claim
43 words
An ophthalmodynamometer according to clain 6 wherein said second means comprsies: a tube member extending from the interior of said hollow cylindrical bladder through said first transparent endwall and said mounting ring to a squeeze bulb shunted by a normally closed exhaust valve.
Claim 11
Dependent Claim
43 words
An ophthalmodynamometer according to clain 6 wherein said second means comprsies: a tube member extending from the interior of said hollow cylindrical bladder through said first transparent endwall and said mounting ring to a squeeze bulb shunted by a normally closed exhaust valve.
Claim 12
Dependent Claim
20 words
An ophthalmodynamometer according to claim 7 wherein said third means comprises: a pressure indicator shunt connected to said tube member.
Claim 13
Dependent Claim
78 words
An ophthalmodynamometer according to claim 8 wherein said first means comprises a transparent eyecup having: a flared portion shaped to subatantially conform to the contour of a sclera and operative to prevent eyelid closure as well as exert force against the sclera; and a frusto-conical portion terminating in a planar rim; wherein said fursto-conical portion and said flared portion abut at their respective smallest diameterS to form a viewing port having a diameter slightly larger than a cornea.
Claim 14
Dependent Claim
17 words
An ophthalmodynamometer according to claim 9 wherein said disc shaped endwalls and said viewing port are concentric.
Claim 15
Dependent Claim
18 words
An ophthalmodynamometer according to claim 10 wherein said bladder is substantially composed of a fluid impermeable, distensible material.
Claim 16
Dependent Claim
12 words
An ophthalmodynamometer according to claim 11 wherein said material is silicone rubber.
References Cited (Backward Citations)
US2341137A
Cited
US2453841A
Cited
US2430851A
Cited
US2836173A
Cited
US3452589A
Cited
US3706304A
Cited
US3835836A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |