US3797505A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Planing instrument for calloused skin
Assignee: Individual
•
Filing: 1972-08-07
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Granted: 1974-03-19
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Expires: 1992-08-07
Abstract
Abstract A planing instrument for corns in which a cutting blade is held by a clip to a planing head. The clip is of U-shaped section with side pieces which are sufficiently large to be readily gripped in one hand to remove the clip for blade replacement purposes. A transverse slot is formed in the planing head adjacent the blade and a portion interconnecting the planing head with a handle is formed with a lens. The head, interconnecting portion and the handle are formed of clear plastics to enable the planing operations to be viewed easily by a user of the instrument.
Inventors
- 👤 H Gilhaus
- 👤 M Villiers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:30
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/54; A61B17/32; A61B17/322; A61B90/00; A61B90/36; A61B90/361; A61B2090/3616
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
161 words
A planing instrument for calloused skin comprising an elongated handle at one of which a junction section, a transverse slot and a planing head are provided, the planing head has a slightly arched working surface adapted to have secured thereon a cutting blade by means of a detachable retaining clip which partially embraces the planing head thus locking itself, said blade being secured in such a way that a gap is formed between its cutting edge and an end of the transverse slot adjacent the handle side, wherein the retaining clip is of essentially Ushaped cross-section defining side pieces extending upwards sufficiently to enable them to be grasped laterally by the thumb and forefinger of one hand, said side pieces abutting against corresponding side surfaces of the planing head and the junction section respectively, the thickness of these being at least as great as the height of the side pieces, and wherein the junction section is provided with a magnifying lens.
Claim 2
Dependent Claim
161 words
A planing instrument for calloused skin comprising an elongated handle at one of which a junction section, a transverse slot and a planing head are provided, the planing head has a slightly arched working surface adapted to have secured thereon a cutting blade by means of a detachable retaining clip which partially embraces the planing head thus locking itself, said blade being secured in such a way that a gap is formed between its cutting edge and an end of the transverse slot adjacent the handle side, wherein the retaining clip is of essentially Ushaped cross-section defining side pieces extending upwards sufficiently to enable them to be grasped laterally by the thumb and forefinger of one hand, said side pieces abutting against corresponding side surfaces of the planing head and the junction section respectively, the thickness of these being at least as great as the height of the side pieces, and wherein the junction section is provided with a magnifying lens.
Claim 3
Dependent Claim
75 words
A planing instrument as claimed in claim 1, wherein the transverse slot has a relatively wide section near to the end adjacent the handle said section being adopted to receive an inclined lug on the retaining clip said lug being perpendicular to the working surface and flared, and wherein inner walls are provided at the opposite end of the slot to the handle and are correspondingly flared so as to receive engagingly said flared lug.
Claim 4
Dependent Claim
31 words
A planing instrument as claimed in claim 2, wherein the transverse slot (7) is provided at the end thereof opposite to the handle with an inclined stop surface for the lug.
Claim 5
Dependent Claim
25 words
A planing instrument as claimed in claim 2, wherein the lug and the corresponding inner walls of the transverse slot are of 1 dove-tail construction.
Claim 6
Dependent Claim
71 words
A planing instrument as claimed in claim 1 wherein the side piecEs of the retaining clip are provided with inner guideways which extend parallel to the handle, there being grooves provided on side surfaces of the planing head for accommodating said inner guideways said grooves terminating respectively on portions of the side surfaces remote from the handle so as to form a stop for the retaining clip in its working position.
Claim 7
Dependent Claim
51 words
A planing instrument as claimed in claim 1, wherein the side pieces of the clip are formed so as to engage in parallel grooves when pressure is applied perpendicularly on the working surface, said grooves being disposed on either side of the working surface in side faces of the planing head.
Claim 8
Dependent Claim
27 words
A planing instrument as claimed in claim 6, wherein the working surface has projections thereon which are constructed as abutments for the blade and the retaining clip.
Claim 9
Dependent Claim
28 words
A planing instrument as claimed in claim 7, wherein one of the projections is a spigot which passes through central apertures in the blade and the clip respectively.
Claim 10
Dependent Claim
38 words
A planing instrument as claimed in claim 8, wherein a further projection is constructed as a shoulder which is perpendicular to the direction of operation of the planing head, said shoulder presenting an abutment for the retaining clip.
Claim 11
Dependent Claim
35 words
A planing instrument as claimed in claim 6 wherein edges of the blade which are perpendicular to its cutting edges on the surfaces abut against internal surfaces of the side pieces of the retaining clip.
Claim 12
Dependent Claim
20 words
A planing instrument as claimed in claim 6, wherein the planing head has indentations in the region of the grooves.
Claim 13
Dependent Claim
22 words
A planing instrument as claimed in claim 1, wherein the magnifying lens is received by a window provided in the junction section.
Claim 14
Dependent Claim
29 words
A planing instrument as claimed in claim 12 wherein the planing head, the handle and the magnifying lens are made in one integral part out of transparent plastics material.
Claim 15
Dependent Claim
18 words
A planing instrument as claimed in claim 13, wherein the magnifying lens is formed at the junction section.
Claim 16
Dependent Claim
26 words
A planing instrument as claimed in claim 1, characterised in that the junction section is constructed on its side adjacent the blade as a flat surface.
Claim 17
Dependent Claim
42 words
A planing instrument as claimed in claim 1 wherein the end of the transverse slot adjacent the handle side is formed by a lug which projects between the working face of the planing head and the corresponding side of the junction section.
References Cited (Backward Citations)
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Cited
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US2286190A
Cited
US2573487A
Cited
US2631368A
Cited
US3600803A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |