US5237520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foot measurement and footwear sizing system
Assignee: Foot Image Tech Inc
•
Filing: 1992-05-29
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Granted: 1993-08-17
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Expires: 2012-05-29
Abstract
Abstract Systems and methods are provided for measuring bottom facing surfaces of a foot which comprise placing the foot against a reference surface, projecting light against the foot, and displaying an image of the foot on a visual display to differentiate relative distances of portions of the foot from the reference surface. In addition, the image differentiates portions of the foot exerting different pressures against the reference surface.
Inventors
- 👤 Jay P. White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:18
CPC Classifications
A; A43; A43D; A43D1/00; A43D1/02; A43D1/025; A61; A61B; A61B5/00; A61B5/103; A61B5/1036; A61B5/107; A61B5/1074
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
219 words
A system for mapping surfaces of a foot, the system comprising: a) a reference surface permitting viewing of the foot from below a bottom surface of the foot when the foot is positioned above the reference surface; b) a light source positioned to project light on the bottom surface of the foot; c) optical measuring means for measuring light reflected off of the foot to determine light intensity levels and color levels of the foot; d) processing means for converting the optically determined light intensity levels of the light reflected off the foot into distance values representing distances of the foot from the reference surface; and the processing means further converting the optically determined color levels of the light reflected off of the foot into pressure values representing pressures exerted by the foot on the reference surface; and e) display means for displaying the distance values so that portions of the foot surfaces which are closer to the reference surface are differentiated from other portions of the foot surfaces which are relatively distant from the reference surface, the display means further displaying the pressure values so that portions of the foot surfaces which are exerting greater pressure against the reference surface are differentiated from other portions of the foot surfaces which are exerting less pressure against the reference surface.
Claim 2
Independent Claim
219 words
A system for mapping surfaces of a foot, the system comprising: a) a reference surface permitting viewing of the foot from below a bottom surface of the foot when the foot is positioned above the reference surface; b) a light source positioned to project light on the bottom surface of the foot; c) optical measuring means for measuring light reflected off of the foot to determine light intensity levels and color levels of the foot; d) processing means for converting the optically determined light intensity levels of the light reflected off the foot into distance values representing distances of the foot from the reference surface; and the processing means further converting the optically determined color levels of the light reflected off of the foot into pressure values representing pressures exerted by the foot on the reference surface; and e) display means for displaying the distance values so that portions of the foot surfaces which are closer to the reference surface are differentiated from other portions of the foot surfaces which are relatively distant from the reference surface, the display means further displaying the pressure values so that portions of the foot surfaces which are exerting greater pressure against the reference surface are differentiated from other portions of the foot surfaces which are exerting less pressure against the reference surface.
Claim 3
Dependent Claim
52 words
The system of claim 1, wherein the display means further displays the distance values so that portions of the foot surfaces which are closer to the reference surface appear in closer three dimensional visual relief in comparison with other portions of the foot surfaces which are relatively distant from the reference surface.
Claim 4
Dependent Claim
55 words
The system of claim 2, wherein the display means further displays the pressure values so that portions of the foot surfaces which are exerting greater pressure against the reference surface appear in closer three dimensional visual relief in comparison with other portions of the foot surfaces which are exerting less pressure against the reference surface.
Claim 5
Dependent Claim
58 words
The system of claim 1, wherein the display means further displays the distance values so that portions of the foot surfaces which are closer to the reference surface than other portions of the foot are displayed with colors of greater wavelength or gray scale values of greater intensity than the portions of the foot which are relatively distant.
Claim 6
Dependent Claim
57 words
The system of claim 4, wherein the display means further displays the pressure values so that portions of the foot surfaces exerting greater pressure against the reference surface than other portions of the foot are displayed with colors of greater wavelength or gray scale values of greater intensity than the portions of the foot exerting less pressure.
Claim 7
Independent Claim
131 words
A method of measuring the displaying surfaces of a foot, the method comprising the steps of: a) placing a bottom surface of a foot adjacent a top of a reference surface; b) projecting light against the bottom surface of the foot; c) optically measuring light reflected off of the foot to determine light intensity levels and color levels of the foot; and d) assigning distance values to the optically determined light intensity levels of the foot; e) assigning pressure values to the optically determined color levels of the foot; f) displaying the distance values to show relative distances from the reference surface of different portions of the foot surfaces; and g) displaying the pressure values to show relative pressures exerted against the reference surface by different portions of the foot surfaces.
Claim 8
Independent Claim
131 words
A method of measuring the displaying surfaces of a foot, the method comprising the steps of: a) placing a bottom surface of a foot adjacent a top of a reference surface; b) projecting light against the bottom surface of the foot; c) optically measuring light reflected off of the foot to determine light intensity levels and color levels of the foot; and d) assigning distance values to the optically determined light intensity levels of the foot; e) assigning pressure values to the optically determined color levels of the foot; f) displaying the distance values to show relative distances from the reference surface of different portions of the foot surfaces; and g) displaying the pressure values to show relative pressures exerted against the reference surface by different portions of the foot surfaces.
References Cited (Backward Citations)
US2009471A
Cited
US3192627A
Cited
US3391392A
Cited
US3457647A
Cited
US3573546A
Cited
US3614237A
Cited
US3609322A
Cited
US3696456A
Cited
US3878761A
Cited
US3764877A
Cited
US3814521A
Cited
US3980938A
Cited
US4185918A
Cited
US4084244A
Cited
US4164815A
Cited
US4215960A
Cited
US4117385A
Cited
US4158507A
Cited
US4224670A
Cited
US4296473A
Cited
US4267728A
Cited
US4328050A
Cited
US4449699A
Cited
US4517504A
Cited
US4299491A
Cited
US4406544A
Cited
US4412364A
Cited
US4433275A
Cited
US4541054A
Cited
US4424570A
Cited
US4385360A
Cited
US4454618A
Cited
US4394608A
Cited
US4575805A
Cited
US4472782A
Cited
US4452057A
Cited
US4450014A
Cited
US4458689A
Cited
US4558420A
Cited
US4603285A
Cited
US4662079A
Cited
US4534365A
Cited
US4598376A
Cited
US4665492A
Cited
US4604807A
Cited
US4538353A
Cited
US4600016A
Cited
US4867570A
Cited
FR2607252A1
Cited
US4952149A
Cited
US4745290A
Cited
US4876758A
Cited
US5033014A
Cited
US5088503A
Cited
US4803348A
Cited
US4817222A
Cited
US4917105A
Cited
US4858621A
Cited
DE3812287A1
Cited
US4897924A
Cited
WO1990005345A1
Cited
US5128870A
Cited
US5123169A
Cited
US5126948A
Cited
US5128880A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-08-16 | 1997-02-15 | 1997-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-08-16 | 2001-02-15 | 2001-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-08-16 | 2005-02-15 | 2005-08-17 | $7700.00 | Window Closed / Lapsed |