# US 9,517,118 B1 · Orthodontic flosser

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- Number: US 9,517,118 B1
- Document ID: US9517118B1
- Status: Granted
- Kind: B1
- Application number: 14/078,509
- Filed: 2013-11-12
- Granted: 2016-12-13
- Earliest claimed: 2009-10-14
- Applicants: N. Michelle Borg; John O. H. Niswonger
- Inventors: N. Michelle Borg; John O. H. Niswonger
- Web page: https://patentgrep.com/patent/US9517118B1

## CPC

- A61C 15/046: {Flossing tools}
- A61C 15/043: {Containers, dispensers, or the like, e.g. with cutting means (A61C15/046 takes precedence)}
- B65H 69/04: by knotting
- A61C: DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE (non-driven toothbrushes A46B; {tongue scrapers A61B17/24;} preparations for dentistry A61K6/00; preparations for cleaning the teeth or mouth A61K8/00, A61Q11/00)
- B65H: HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES

## Abstract

An orthodontic flosser comprising an elongated handle and a head coupled to the handle is disclosed. A projection extend for suspending floss is sized for insertion of floss between a wire affixed to a tooth and the tooth. A source spool of fresh floss is configured to feed fresh floss incrementally into suspension from the projection while a take-up bobbin is configured for taking up used floss and applying tension to the suspended floss. A button may be used for releasing the source spool to rotate, and for holding the source spool against rotation. The source spool and take-up bobbin may be disposed in separated chambers to reduce cross contamination. A retie flange in the take-up bobbin and a retie slot in a take-up chamber are configured for retiying broken floss around a spindle of the take-up bobbin.

## Claims

### Claim 1

A flosser comprising:
a handle;
a head including a first and second floss support for suspending floss therebetween, the second floss support including an aperture sized for feeding the floss into suspension between the first and second floss supports, the second floss support shaped for insertion of the aperture into a space between the wire brace and two adjacent teeth for cleaning an interproximal space between the two teeth using suspended floss;
a source chamber coupled to a first end of the handle and configured to support the head, the source chamber enclosing a source spool for dispensing floss to the aperture in the second floss support;
a button configured to release tension on the floss;
a take-up chamber coupled to a second end of the handle opposite the source chamber, the take-up chamber and the source chamber external to the handle, the take-up chamber having a retie slot proximate the handle, the retie slot including a capture fence extending above a rim of the take-up chamber and a guide edge configured to bias floss into the retie slot;
a take-up bobbin disposed in the take-up chamber for receiving used floss, the take-up bobbin including a retie flange extending at an angle above the rim of the take-up chamber, the retie flange and the guide edge configured to trap the floss and to urge the floss into the retie slot while rotating the take-up bobbin;
a grip disposed on the take-up bobbin, the grip configured for wrapping a broken end of the floss around the grip, wherein the grip includes a horn on either end of the grip, the horns configured for holding the floss on the grip while wrapping a broken end of the floss around the grip.

### Claim 2 (depends on 1)

The flosser of claim 1, wherein the capture fence is configured to constrain the floss proximate the retie slot during rotation of the take-up bobbin.

### Claim 3 (depends on 1)

The flosser of claim 1, wherein the capture fence is configured to constrain the floss proximate the retie slot during wrapping of the broken end of the floss a the grip.

### Claim 4 (depends on 1)

The flosser of claim 1, wherein the horns are further configured to dispose the floss adjacent and about parallel to an upper flange of the take-up bobbin.

### Claim 5 (depends on 1)

The flosser of claim 1, wherein the take-up bobbin further includes an upper flange, a lower flange, a spindle, and a ratchet, the retie flange extending at an angle from the upper flange.

### Claim 6 (depends on 5)

The flosser of claim 5, wherein the grip, the retie flange, the upper flange, the lower flange, the spindle, and the ratchet are fabricated as one single entire unitary piece.

### Claim 7

A method for retying broken floss on a flosser including a pair of projections for suspending the floss, the method comprising:
rotating a take-up bobbin including a retie channel disposed in an upper flange to align the retie channel with a retie slot disposed in a take-up chamber, the retie channel adjacent a retie flange extending upward from and above the upper flange;
wrapping an end of the broken floss around a grip of a take-up bobbin, wherein the grip includes a horn on either end of the grip, the horns configured for holding the floss on the grip while wrapping the end of the broken floss around the grip;
pressing a button to release source spool to rotate freely;
rotating the take-up bobbin to position a portion of the retie flange above the floss after wrapping the end of the broken floss around the grip;
further rotating the take-up bobbin to urge the floss against a guide edge of the retie slot;
further rotating the take-up bobbin to close a top of the retie slot using the upper flange;
further rotating the take-up bobbin at least two complete turns to wrap the floss around a spindle of the take-up bobbin until the floss is secured to the spindle;
releasing the button; and
rotating the take-up bobbin to apply tension to the floss suspended between the pair of projections.

### Claim 8 (depends on 7)

The method of claim 7, further comprising pressing the button and pulling a length of floss from the source spool before wrapping the end of the broken floss around the grip.

### Claim 9 (depends on 8)

The method of claim 8, further comprising re-threading the floss through a handle of the flosser, a head of the flosser, and at least one of the projections.

### Claim 10 (depends on 7)

The method of claim 7, further comprising holding an end of the floss against the grip while rotating the take-up bobbin.

### Claim 11 (depends on 7)

The method of claim 7, further comprising:
a) detecting slip of the floss on the spindle when applying tension;
b) pressing the button;
c) further rotating the take-up bobbin at least two additional complete turns to wrap additional floss around a spindle of the take-up bobbin;
d) releasing the button;
e) rotating the take-up bobbin to apply tension to the floss and detect slipping;
f) repeating steps b-e if slip of the floss on the spindle is detected when applying tension.

### Claim 12 (depends on 7)

The method of claim 7, further comprising removing floss wrapped around the grip of the take-up bobbin.

### Claim 13 (depends on 7)

The method of claim 7, wherein the guide edge forms an angle with respect to the retie slot, the angle of the guide edge configured to force the floss into the retie slot.

### Claim 14 (depends on 7)

The method of claim 7, wherein the ends of the grip form an angle configured to hold the floss wound around the grip and against the upper flange.

### Claim 15

A retiable flosser comprising:
a head including a pair of projections configured to support floss suspended therebetween;
a source chamber supporting the head;
a handle coupled to the source chamber;
a take-up chamber coupled to the handle;
a bobbin rotatably disposed in the take-up chamber, the bobbin including an upper flange, a lower flange, a spindle for winding floss between the upper and lower flanges, and a grip for rotating the bobbin, wherein the grip includes an undercut forming a horn configured for holding floss on the grip while wrapping floss around the grip;
a retie slot disposed in the take-up chamber proximate the handle;
a capture fence extending above a rim of the take-up chamber, the capture fence configured to constrain floss above the retie slot while wrapping floss around the grip;
a guide edge disposed along one side of the retie slot, the guide edge forming an angle configured for forcing floss into the take-up chamber while rotating the bobbin;
a retie channel disposed in the upper flange; and
a retie flange forming one edge of the retie channel, the retie flange extending above a plane of the upper flange and above a rim of the take-up chamber, the retie flange configured for forcing floss against the guide edge and into the retie slot while rotating the bobbin using the grip, the grip further configured for receiving at least two wraps of floss around the grip and holding wraps of floss adjacent the upper flange while rotating the bobbin.

### Claim 16 (depends on 15)

The flosser of claim 15, further comprising a longitudinal channel along the handle for providing free movement of used floss along the handle while gripping the handle, the longitudinal channel aligned with the retie slot.

### Claim 17 (depends on 15)

The flosser of claim 15, wherein the grip, the retie flange, the upper flange, the lower flange, the spindle, and a ratchet are fabricated as one single entire unitary piece.

### Claim 18 (depends on 15)

The flosser of claim 15, wherein the horn is further configured to dispose a portion of the floss adjacent a plane of the upper flange.