# US 4,380,379 A · Optometric device

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- Number: US 4,380,379 A
- Document ID: US4380379A
- Status: Granted
- Kind: A
- Application number: 06/181,452
- Filed: 1980-08-25
- Granted: 1983-04-19
- Earliest claimed: 1980-08-25
- Assignees: Fairfield Optical Company, Inc.
- Inventors: John Ahern; Wayne Farmer; David Hawes; Herbert J. McEvoy, Jr.
- Web page: https://patentgrep.com/patent/US4380379A

## CPC

- G02C 1/04: Bridge or browbar secured to or integral with partial rims, e.g. with partially-flexible rim for holding lens
- G02C: SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURES AS SPECTACLES; CONTACT LENSES (trial frames for testing the eyes A61B3/04; goggles or eyeshields not having the same features as spectacles A61F9/00)

## Abstract

An optometric device includes a semi-rimless plastic two lens frame having two rim surfaces for mounting two lenses in the frame, each having a circumferential groove therearound. The lenses are mounted by the use of a rib projecting from the rim surfaces and integral therewith and configured to engage with a portion of the lens groove to axially fix the lens and by a line and winder which releasably engages the remaining portion of the groove of the lens to radially fix the lens.

## Claims

### Claim 1

An optometric device comprising:
a semi-rimless plastic two lens frame having two rim surfaces;
two lenses for mounting in the frame each having a circumferential groove therearound; and
means for mounting the lenses in the frame comprising for each lens means forming a rib projecting from the rim surface and integral therewith and configured to engage with a portion of the lens groove to axially fix the lens and means connected to the frame for releasably engaging a remaining portion of the groove of the lens to radially fix the lens, wherein the releasably engaging means comprises a flexible line, means connecting the line is extendable along a portion of the remaining lens groove and receivable therein and winding means mounting in the frame and connected to the other end of the line for maintaining the line in a taut state, the winding means comprising means forming an unthreaded bore in the frame and a threaded rod having means disposed at one end for engaging said other end of the line and configured to tightly fit in the bore when the line is wrapped in the threads thereof and having means disposed at the other end effecting the turning thereof to simultaneously wrap the line therearound and insert the rod in the bore until the line is taut.

### Claim 2 (depends on 1)

The device according to claim 1, wherein the means connecting the one end of the line comprises a second bore in the frame followed by a relatively narrower throughbore opening at the rim adjacent one end of the rib.

### Claim 3 (depends on 2)

The device according to claim 2, wherein the one end of the line is knotted and is seated in the second bore.

### Claim 4 (depends on 1)

The device according to claim 1, wherein the line comprises nylon.

### Claim 5 (depends on 4)

The device according to claim 4, wherein the line comprises a stainless steel core with a nylon jacket.

### Claim 6

An optometric device comprising:
a semi-rimless two lens frame having two rim surfaces;
two lenses for mounting in the frame, each having a circumferential groove therearound; and
means for mounting the lenses in the frame comprising for each lens means forming a rib projecting from the rim surface and configured to engage with a portion of the lens groove to axially fix the lens and means connected to the frame for releasably engaging a remaining portion of the groove of the lens to radially fix the lens including a flexible line, means connecting the line at one end to the frame so that it is extendable along a portion of the remaining lens groove and receivable therein and winding means mounted in the frame and connected to the other end of the line to maintain the line in a taut state, the winding means comprises means forming an unthreaded bore and a threaded rod configured to tightly fit in the bore when the line is wrapped around the threads thereof and having means disposed at one end for engaging said other end of the line and having means disposed at the other end for effecting the turning thereof to simultaneously wrap the line therearound and insert the rod in the bore until the line is taut.

### Claim 7 (depends on 6)

The device according to claim 6, wherein the means connecting the one end of the line comprises a second bore in the frame followed by a relatively narrower throughbore opening at the rim adjacent one end of the rib.

### Claim 8 (depends on 7)

The device according to claim 7, wherein the one end of the line is knotted and is seated in the second bore.

### Claim 9 (depends on 8)

The device according to claim 8, wherein the line comprises nylon.

### Claim 10 (depends on 7)

The device according to claim 7, wherein the line comprises a stainless steel core with a nylon jacket.