EP0250634A1 - Nonskid hobnailed undershoe - Google Patents
Nonskid hobnailed undershoe Download PDFInfo
- Publication number
- EP0250634A1 EP0250634A1 EP86109079A EP86109079A EP0250634A1 EP 0250634 A1 EP0250634 A1 EP 0250634A1 EP 86109079 A EP86109079 A EP 86109079A EP 86109079 A EP86109079 A EP 86109079A EP 0250634 A1 EP0250634 A1 EP 0250634A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- undershoe
- sole
- hobnailed
- featured
- protrusions
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43C—FASTENINGS OR ATTACHMENTS OF FOOTWEAR; LACES IN GENERAL
- A43C15/00—Non-skid devices or attachments
- A43C15/06—Ice-gripping devices or attachments, e.g. ice-spurs, ice-cleats, ice-creepers, crampons; Climbing devices or attachments, e.g. mountain climbing irons
-
- A—HUMAN NECESSITIES
- A43—FOOTWEAR
- A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- A43B5/00—Footwear for sporting purposes
- A43B5/18—Attachable overshoes for sporting purposes
Definitions
- This invention concerns a nonskid hobnailed undershoe which can be worn under usually worn shoes directly and quickly.
- the hobnailed.undershoe concerned allows to avoid skidding when one walks on icy and/or snowy surfaces with no need of wearing special shoes or boots.
- An essential feature of this invention is that the undershoe is a sheath of elastic material, which has an open upper side into which the usual shoe wearing foot can be inserted and a lower side that comprises a sole of resilient, semiflexible material that, on its turn, comprises a range of nail-shaped metal inserts, the points of which protrude out of the sole of resilient material and are turned toward the outside of the sole.
- a further main feature of the invention is that the sole of resilient material is shaped with grooves alternated with protrusions.
- the grooves and the protrusions are parallel, have a rectangular section parallelepiped shape and are arranged transversally to the main dimension (length) of the undershoe.
- the metal nails which are preferably made of stainless steel or other hard, stainless metal alloys, are favourably inserted into the protrusions. It is obvious to any expert in this line that many other shapes and arrangements of protrusions and grooves in the stiff side of the sole of the undershoe concerned are possible, such as a range of rolls or square-based parallelepipeds, evenly arranged on the sole surface. In any case, the ratio between the contact surfaces of the protruding parts to the ground and the total surface of the undershoe sole shall range from 40 % and 70 %. Lower values of protruding surface are unfavourable and make walking uncomfortable, while higher values reduce the grip of protrusions on snow.
- the quantity of metal nails inserted into the protruding parts of sole is typically 20 to 60 nails in total per .sole.
- the points of said nails protrude from the semirigid side of sole for an height O.1 to 2 mm; in the favourite model the value of said protrusion is 0.2 to 0.6 mm.
- natural and/or synthetic polymeric materials of elastomeric type such as natural rubber, SBR, nitrile,.chloroprene, butyl, ethylene-propylene, silicone, fluoride, polyurethan elastomers, both as vulcanizable moldable masses and as latexes.
- thermoplastic type such as polyesters, polyamides, polycarbonates, polyacetales, polyolefines, polyacrylics, polyurethanes, ABS, PVC proved particularly suitable.
- the above said materials can be compounded with their proper additives, plasticizers, pigments commonly used in the rubber industry and compatible with the chosen material, in order to get the rigidity-, resiliency- and abrasion resistance - values required for the specific case.
- Molding of this undershoe according to this invention can be done with the usual molding or casting methods used for the single materials. Molding or casting are performed as a two-stage process: during the first stage the sole with metal inserts is molded, during the second stage the sheath is molded and the sole is used as an insert. This following-insert two-stage process makes the finished piece particularly resistant, because there is no possibility of unsticking of the sole from the sheath.
- the hobnailed undershoe of th shown type is a sheath of vulcanized natural rubber into which, before vulcanizing, an insert or molded ABS polymer having a range of rectangular section parallelepiped protrusions 2 with inserted steel nails 1 was inserted.
- the parallelepiped protrusions 2 are spaced by grooves 3 so that the lower surface of the protruding part amounts to 60 % of the total sole surface.
- the side edge of the sheath is 1 to 3 cm. high, while the front side is shaped to enclose shoe- tip for a length of 2 to 4 cm. and the back side is 3 to 6 cm. high. It is clear that the undershoe under this invention can be made in different shapes suitable to be easily worn both on standard shoes and on climbing-or ski-boots, both for men and for women.
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Abstract
A nonskid hobnailed undershoe composed of a sheath (4) of elastic material with a shaped insert of semiflexible, resilient material as sole, said insert having downward protruding metal nails (1), is specified herein.
Description
- This invention concerns a nonskid hobnailed undershoe which can be worn under usually worn shoes directly and quickly. Precisely, the hobnailed.undershoe concerned allows to avoid skidding when one walks on icy and/or snowy surfaces with no need of wearing special shoes or boots. An essential feature of this invention is that the undershoe is a sheath of elastic material, which has an open upper side into which the usual shoe wearing foot can be inserted and a lower side that comprises a sole of resilient, semiflexible material that, on its turn, comprises a range of nail-shaped metal inserts, the points of which protrude out of the sole of resilient material and are turned toward the outside of the sole. A further main feature of the invention is that the sole of resilient material is shaped with grooves alternated with protrusions. In a favourite type of the invention, the grooves and the protrusions are parallel, have a rectangular section parallelepiped shape and are arranged transversally to the main dimension (length) of the undershoe.
- The metal nails, which are preferably made of stainless steel or other hard, stainless metal alloys, are favourably inserted into the protrusions. It is obvious to any expert in this line that many other shapes and arrangements of protrusions and grooves in the stiff side of the sole of the undershoe concerned are possible, such as a range of rolls or square-based parallelepipeds, evenly arranged on the sole surface. In any case, the ratio between the contact surfaces of the protruding parts to the ground and the total surface of the undershoe sole shall range from 40 % and 70 %. Lower values of protruding surface are unfavourable and make walking uncomfortable, while higher values reduce the grip of protrusions on snow. The quantity of metal nails inserted into the protruding parts of sole, is typically 20 to 60 nails in total per .sole. The points of said nails protrude from the semirigid side of sole for an height O.1 to 2 mm; in the favourite model the value of said protrusion is 0.2 to 0.6 mm. Among the elastic materials that are very useful to make the undershoe under this invention we can mention natural and/or synthetic polymeric materials of elastomeric type such as natural rubber, SBR, nitrile,.chloroprene, butyl, ethylene-propylene, silicone, fluoride, polyurethan elastomers, both as vulcanizable moldable masses and as latexes.
- Obviously, it is also possible to compound the above said elastomers with normal additives used in rubber industry in order to obtain particular performances or looks or reductions in:,the-costs of finished goods. Among the semirigid, resilient materials suitable for making the sole of the undershoe concerned, polymer materials of thermoplastic type, such as polyesters, polyamides, polycarbonates, polyacetales, polyolefines, polyacrylics, polyurethanes, ABS, PVC proved particularly suitable. In this case, too, like the elastomeric materials for sheath, the above said materials can be compounded with their proper additives, plasticizers, pigments commonly used in the rubber industry and compatible with the chosen material, in order to get the rigidity-, resiliency- and abrasion resistance - values required for the specific case. Molding of this undershoe according to this invention can be done with the usual molding or casting methods used for the single materials. Molding or casting are performed as a two-stage process: during the first stage the sole with metal inserts is molded, during the second stage the sheath is molded and the sole is used as an insert. This following-insert two-stage process makes the finished piece particularly resistant, because there is no possibility of unsticking of the sole from the sheath.
- The attached figures show a favourite type of the invention.
- In particular
- FIGURE 1 is a plan view of the lower side of the undershoe
- FIGURE 2 is a side view of the undershoe on Fig.1 and
- FIGURE 3 is a plan view of the upper side of the undershoe concerned.
- Making reference to the above figures, the hobnailed undershoe of th shown type is a sheath of vulcanized natural rubber into which, before vulcanizing, an insert or molded ABS polymer having a range of rectangular section
parallelepiped protrusions 2 with inserted steel nails 1 was inserted. - The
parallelepiped protrusions 2 are spaced by grooves 3 so that the lower surface of the protruding part amounts to 60 % of the total sole surface. - Height and shape of the side edge of the
sheath 4 . guarantee the best bodying between the lower edge of the footwear inserted into the undershoe concerned and the undershoe under this invention. - Typically, the side edge of the sheath is 1 to 3 cm. high, while the front side is shaped to enclose shoe- tip for a length of 2 to 4 cm. and the back side is 3 to 6 cm. high. It is clear that the undershoe under this invention can be made in different shapes suitable to be easily worn both on standard shoes and on climbing-or ski-boots, both for men and for women.
Claims (5)
1. Nonskid hobnailed undershoe directly and quickly wearable under usual footwear, featured by a sheath of elastic material the upper side of which is open and the lower side of which has an inserted sole of resilient, semiflexible material that, on its turn, encloses a range of nail-shaped metal inserts, the points of which protrude out of the sole of resilient material and are turned toward the outside of the sole.
2. Hobnailed undershoe according to the claim 1, featured by a sheath of elastic material having a 1 to 3 cm. high side edge, a front side shaped to enclose shoe- tip for a length of 2 to 4 cm. and a 3 to 6 cm. high back side.
3. Hobnailed undershoe according to the claims 1 and 2, featured by the fact that its sole of resilient, semiflexible material is shaped with a range of protrusions alternated with grooves, so that the ratio of the contact surfaces of the protruding parts in touch with ground to the total surface of the undershoe sole is 40 % to 70 %.
4. Hobnailed undershoe according to the claim 3, featured by the fact that the grooves and the protrusions have rectangular section parallelepiped shapes, are parallel and arranged transversally to the main dimension of the undershoe.
5. Hobnailed undershoe according to claim 3 featured by the fact that the metal inserts in the sole protrusions of resilient material protrude from the soles for an height of 0.1 to 2 mm and there are 20 to 60 inserts per sole.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP86109079A EP0250634A1 (en) | 1986-07-03 | 1986-07-03 | Nonskid hobnailed undershoe |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP86109079A EP0250634A1 (en) | 1986-07-03 | 1986-07-03 | Nonskid hobnailed undershoe |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0250634A1 true EP0250634A1 (en) | 1988-01-07 |
Family
ID=8195238
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86109079A Withdrawn EP0250634A1 (en) | 1986-07-03 | 1986-07-03 | Nonskid hobnailed undershoe |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP0250634A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4985340A (en) * | 1988-06-01 | 1991-01-15 | Minnesota Mining And Manufacturing Company | Energy curable compositions: two component curing agents |
FR2699375A1 (en) * | 1992-12-21 | 1994-06-24 | Nadaud Jean | Sole fixed to shoe for walking on slippery ground |
FR2709929A1 (en) * | 1993-09-13 | 1995-03-24 | Inova France | Non-slip sole |
US5469644A (en) * | 1992-06-09 | 1995-11-28 | Vidler; James W. | Footwear accessory |
EP1181872A2 (en) * | 2000-08-25 | 2002-02-27 | Sure Foot Corporation | Anti-slip overshoe and spike assembly |
EP2465374A1 (en) * | 2010-12-16 | 2012-06-20 | Urban Art, S.L. | Footwear cover with nails |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1841710A (en) * | 1930-12-06 | 1932-01-19 | Edward C Byrne | Overshoe for use in sports |
DE1936861A1 (en) * | 1969-07-19 | 1971-01-28 | Otto Enser | Chimney hood |
US3643352A (en) * | 1970-10-02 | 1972-02-22 | Raymond K S Adair | Overshoe for golf |
FR2423173A1 (en) * | 1978-04-19 | 1979-11-16 | Michel Martial | Sole for walking on slippery ground - is secured by straps to shoe and has studs on lower face |
US4246707A (en) * | 1980-03-27 | 1981-01-27 | Frank Pedersen | Convertible overshoes |
US4434565A (en) * | 1980-03-27 | 1984-03-06 | Haley Robert D | Non-slip overshoe |
-
1986
- 1986-07-03 EP EP86109079A patent/EP0250634A1/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1841710A (en) * | 1930-12-06 | 1932-01-19 | Edward C Byrne | Overshoe for use in sports |
DE1936861A1 (en) * | 1969-07-19 | 1971-01-28 | Otto Enser | Chimney hood |
US3643352A (en) * | 1970-10-02 | 1972-02-22 | Raymond K S Adair | Overshoe for golf |
FR2423173A1 (en) * | 1978-04-19 | 1979-11-16 | Michel Martial | Sole for walking on slippery ground - is secured by straps to shoe and has studs on lower face |
US4246707A (en) * | 1980-03-27 | 1981-01-27 | Frank Pedersen | Convertible overshoes |
US4434565A (en) * | 1980-03-27 | 1984-03-06 | Haley Robert D | Non-slip overshoe |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4985340A (en) * | 1988-06-01 | 1991-01-15 | Minnesota Mining And Manufacturing Company | Energy curable compositions: two component curing agents |
US5469644A (en) * | 1992-06-09 | 1995-11-28 | Vidler; James W. | Footwear accessory |
FR2699375A1 (en) * | 1992-12-21 | 1994-06-24 | Nadaud Jean | Sole fixed to shoe for walking on slippery ground |
FR2709929A1 (en) * | 1993-09-13 | 1995-03-24 | Inova France | Non-slip sole |
EP1181872A2 (en) * | 2000-08-25 | 2002-02-27 | Sure Foot Corporation | Anti-slip overshoe and spike assembly |
EP1181872A3 (en) * | 2000-08-25 | 2004-07-07 | Sure Foot Corporation | Anti-slip overshoe and spike assembly |
US6836977B2 (en) | 2000-08-25 | 2005-01-04 | Larson Jon C | Anti-slip overshoe |
USRE42965E1 (en) | 2000-08-25 | 2011-11-29 | Sure Foot Corporation | Anti-slip overshoe |
USRE44193E1 (en) | 2000-08-25 | 2013-05-07 | Sure Foot Corporation | Replaceable spikes for anti-slip overshoe |
EP2465374A1 (en) * | 2010-12-16 | 2012-06-20 | Urban Art, S.L. | Footwear cover with nails |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE FR GB IT LI LU NL SE |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 19880908 |
|
RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: SALUTATI, GIOVANNI |