US5233470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable lens assembly
Assignee: Hsin Yi Foundation
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Filing: 1992-12-30
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Granted: 1993-08-03
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Expires: 2012-12-30
Abstract
Abstract Disclosed is a variable lens assembly having a water chamber defined with a front lens holder between two flexible, transparent diaphragms and filled with a fluid, and a syringe connected to the front lens holder and controlled to vary the volume of the water chamber. The diaphragms are stretched to curve outwards and form into a biconvex lens as the plunger of the syringe is pushed forwards in compressing the fluid; the diaphragms are induced to curve inwards and form into a biconcave lens as the plunger of the syringe is pulled backwards in releasing the fluid.
Inventors
- 👤 Chian-Hwa Wu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:41
CPC Classifications
G; G02; G02B; G02B3/00; G02B3/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
178 words
A variable lens assembly comprising: a front lens holder having two flexible, transparent, horizontal diaphragms uniformly spaced from each other, a water chamber defined between said diaphragms, and a water passage hole; a rear lens holder having a hollow spherical lens means on the inside for trying experiments in converging and diverging rays of light; a barrel having a front end connected to said front lens holder and communicated with said water chamber through said water passage hole, and a rear end terminated to an inward annular flange; a plunger having a front end inserted through said inward annular flange into said barrel and coupled with a seal and a rear end connected to said rear lens holder; a fluid filled in said water chamber and part of said barrel; and whereby pushing said plunger forward to compress said fluid causes said diaphragms to curve outwards in reverse directions and form into a biconvex lens; pulling said plunger backwards to release said fluid causes said diaphragms to curve inwards toward each other and form into a biconcave lens.
Claim 2
Dependent Claim
178 words
A variable lens assembly comprising: a front lens holder having two flexible, transparent, horizontal diaphragms uniformly spaced from each other, a water chamber defined between said diaphragms, and a water passage hole; a rear lens holder having a hollow spherical lens means on the inside for trying experiments in converging and diverging rays of light; a barrel having a front end connected to said front lens holder and communicated with said water chamber through said water passage hole, and a rear end terminated to an inward annular flange; a plunger having a front end inserted through said inward annular flange into said barrel and coupled with a seal and a rear end connected to said rear lens holder; a fluid filled in said water chamber and part of said barrel; and whereby pushing said plunger forward to compress said fluid causes said diaphragms to curve outwards in reverse directions and form into a biconvex lens; pulling said plunger backwards to release said fluid causes said diaphragms to curve inwards toward each other and form into a biconcave lens.
Claim 3
Dependent Claim
21 words
The variable lens assembly of claim 1 wherein said diaphragms are respectively covered with a transparent protective layer on the outside.
Claim 4
Dependent Claim
19 words
The variable lens assembly of claim 1 wherein said diaphragms are marked with markings for checking the respective curvature.
Claim 5
Dependent Claim
41 words
The variable lens assembly of claim 1 wherein said front lens holder further comprises a nozzle tip means covered with a cap for drawing off said fluid from said water chamber or sucking in a new fluid into said water chamber.
Claim 6
Dependent Claim
17 words
The variable lens assembly of claim 1 wherein said barrel is marked with graduations for showing measure.
Claim 7
Dependent Claim
20 words
The variable lens assembly of claim 1 wherein said top and bottom diaphragms are respectively made from a transparent polymer.
Claim 8
Dependent Claim
14 words
The variable lens assembly of claim 1 wherein said fluid is a colorless fluid.
Claim 9
Dependent Claim
14 words
The variable lens assembly of claim 1 wherein said fluid is a colored fluid.
Claim 10
Dependent Claim
31 words
The variable lens assembly of claim 1 wherein said plunger is fastened to said barrel through a screw joint and rotated to move said seal back and forth within said barrel.
References Cited (Backward Citations)
US504890A
Cited
US3161718A
Cited
JPS5536857A
Cited
US4890903A
Cited
DE3630700A1
Cited
US4913536A
Cited
JPH032301A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-08-02 | 1997-02-01 | 1997-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-02 | 2001-02-01 | 2001-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-02 | 2005-02-01 | 2005-08-03 | $7700.00 | Window Closed / Lapsed |