Patent US4793354A successfully refreshed from Google Patents.
US4793354A
Expired / Lapsed
US
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Touch enhancement
Assignee: Becton Dickinson and Co
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Filing: 1987-10-20
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Granted: 1988-12-27
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Expires: 2007-10-20
Abstract
Abstract The sense of touch is enhanced by: (1) placing two layers of a pliable, elastic material between the fingertips and the object being touched; (2) maintaining the coefficient of kinetic friction between the two layers at less than the coefficient between the fingertips and the top layer and less than the coefficient between the object being touched and the bottom layer; and (3) moving the fingertips over the object being touched separated by the two layers of material.
Inventors
- 👤 H. Earl Wright
- 👤 Don A. Perry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:53
CPC Classifications
A; A61; A61B; A61B10/00; A61B10/0041
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
194 words
A method of enhancing the sense of touch which comprises: (a) providing two layers of a pliable, elastic material, each layer having a thickness of about 0.002 to 0.020 inches, a modulus of elasticity at 300 percent elongation of less than about 3,500 psi, a tensile strength of greater than about 3,000 psi, and an ultimate elongation of greater than about 300 percent so that the layers are resistant to tearing and puncturing and are able to conform to the contours of the object being touched and to readily transmit touch stimuli; (b) placing the two layers between the fingertips and the object being touched in such a way that the two layers can move freely relative to each other; (c) maintaining the coefficient of kinetic friction between the two layers at less than the coefficient between the fingertips and the top layer and less than the coefficient between the object being touched and the bottom layer so that the top layer moves with the fingertips while the bottom layer remains stationary over the object being touched; and (d) moving the fingertips over the object being touched separated by the two layers of material.
Claim 2
Independent Claim
194 words
A method of enhancing the sense of touch which comprises: (a) providing two layers of a pliable, elastic material, each layer having a thickness of about 0.002 to 0.020 inches, a modulus of elasticity at 300 percent elongation of less than about 3,500 psi, a tensile strength of greater than about 3,000 psi, and an ultimate elongation of greater than about 300 percent so that the layers are resistant to tearing and puncturing and are able to conform to the contours of the object being touched and to readily transmit touch stimuli; (b) placing the two layers between the fingertips and the object being touched in such a way that the two layers can move freely relative to each other; (c) maintaining the coefficient of kinetic friction between the two layers at less than the coefficient between the fingertips and the top layer and less than the coefficient between the object being touched and the bottom layer so that the top layer moves with the fingertips while the bottom layer remains stationary over the object being touched; and (d) moving the fingertips over the object being touched separated by the two layers of material.
Claim 3
Dependent Claim
78 words
The method of claim 1 wherein step (c) comprises maintaining a minimum layer of lubricant between the two layers of material to maintain the coefficient of kinetic friction between the two layers at less than the coefficient between the fingertips and the top layer and less than the coefficient between the object being touched and the bottom layer so that the top layer moves with the fingertips while the bottom layer remains stationary over the object being touched.
Claim 4
Dependent Claim
90 words
The method of claim 2 wherein step (a) comprises providing two layers of a pliable, elastic material, each layer having a thickness of about 0.003 to 0.010 inches, a modulus of elasticity at 300 percent elongation of less than about 2,500 psi, a tensile strength of greater than about 4,000 psi, and an ultimate elongation of greater than about 400 percent so that the layers are resistant to tearing and puncturing and are able to conform to the contours of the object being touched and to readily transmit touch stimuli.
Claim 5
Dependent Claim
18 words
The method of claim 3 additionally comprising: (e) maintaining the fingertips in a dry condition throughout the method.
Claim 6
Dependent Claim
25 words
The method of claim 4 wherein step (c) further comprises reducing the coefficient of kinetic friction between the layers by at least about 60 percent.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-12-27 | 1992-06-27 | 1992-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-27 | 1996-06-27 | 1996-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-27 | 2000-06-27 | 2000-12-27 | $7700.00 | Window Closed / Lapsed |