US3729840A - Backless clog construction - Google Patents

Backless clog construction Download PDF

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Publication number
US3729840A
US3729840A US00231505A US3729840DA US3729840A US 3729840 A US3729840 A US 3729840A US 00231505 A US00231505 A US 00231505A US 3729840D A US3729840D A US 3729840DA US 3729840 A US3729840 A US 3729840A
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US
United States
Prior art keywords
clog
foot
liner
opening
foam
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.)
Expired - Lifetime
Application number
US00231505A
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English (en)
Inventor
J Famolare
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Famolare Inc
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Famolare Inc
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Filing date
Publication date
Application filed by Famolare Inc filed Critical Famolare Inc
Application granted granted Critical
Publication of US3729840A publication Critical patent/US3729840A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B3/00—Footwear characterised by the shape or the use
    • A43B3/10—Low shoes, e.g. comprising only a front strap; Slippers
    • A43B3/101—Slippers, e.g. flip-flops or thong sandals
    • A43B3/102—Slippers, e.g. flip-flops or thong sandals leaving the heel of the foot bare 
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B1/00—Footwear characterised by the material
    • A43B1/14—Footwear characterised by the material made of plastics

Definitions

  • ABSTRACT A comfortable, backless clog having a specially shaped rigid upper and a rigid lower is disclosed herein.
  • the clog is held comfortably and snugly to the foot of the wearer by a unique arrangement including a foam lining which cooperates with the rigid upper and lower to define a keyhole" opening into which the skewed foot of the user may be inserted and then rotated to lock the foot securely in the clog.
  • the clog may be made from wood or plastic and provides a new shoe construction having the appearance of so-called wooden shoes, or Dutch shoes.
  • Wooden shoes especially Dutch-type wooden shoes are very well known to the art. Indeed, the patent literature includes disclosures of such wooden shoes dating back more than a hundred years. Foam lined shoes and foam lined rigid boots, all having backs and/or ankle supports, are also well known to the art, and the patent literature is replete with disclosures of this type of ski boots.
  • a Dutch shoe type of clog which may be securely, safely, and comfortably held to the foot of the wearer and which may be mass produced at reasonable cost, has not been available to the art. Accordingly, it is to the provision of a new and improved wooden shoe type construction (although the present shoe may also be manufactured from injection molded plastic or other comparable rigid materials) that the present disclosure is directed.
  • the new shoe construction comprises essentially a specially configured and foam filled rigid upper and a contoured rigid lower, which rigid elements give the new clog the general appearance of a conventional wooden shoe.
  • the rigid upper is shortened and does not include any back portion.
  • the rear edges of the upper are specially arched and disposed in a plane canted with respect to the lower.
  • the upper and lower combine to form an oversized," in relation to the foot size intended to be accommodated by the new clog, cavity for the foot of the wearer.
  • This cavity is overstuffedwith a specially configured, partly folded liner of expanded plastic foam sheet material, such as flexible, resilient, polyurethane foam.
  • the liner is blanked out of sheets of foam material and specially shaped and folded to line or to overstuff the cavity and to define a foot space between the upper and lower.
  • the folded foam liner defines a narrow keyhole or throat opening which may be entered by the foot only when it is rotated slightly to a position generally parallel with the opening, a position in which the foot is in a vertical or inclined plane, rather than in a horizontal plane of the surfaces of the lower.
  • the user of the shoe may lock his foot therein by, turning the foot, after its widest portions have passed through the narrow throat opening, to a position in which the widest portions of the foot are in a horizontal plane and locked behind the narrow throat opening.
  • the flexi' ble foam provides cushioning of the upper portions of the foot as well as locking of the foot within the clog.
  • FIG. 1 is a front, perspective view of a new and improved clog embodying the principles of the presentinvention
  • FIG. 2 is a rear, perspective view of the clog of the invention
  • FIG. 3 is a cross-sectional view of the upper of the invention showing details of construction of the plastic foam lining
  • FIG. 4 is a plan view of the new and improved foam liner blank of the present invention.
  • FIG. 5 is a perspective view showing the manner in which the liner is folded twice upon itself for insertion into and assembly with the rigid upper of the clog of the invention
  • FIG. 6 is a cross-sectional view of the upper of the in vention showing the manner in which the folded liner is inserted into the new clog and secured thereto;
  • FIG. 7 is a cross-sectional view of the new and improved clog taken along line 7-7 of FIG. 3 and showing the folded lining of the new clog and the throat-like portions defined by said lining in accordance with the principles of the invention.
  • the new Dutch-type clog of the invention is indicated generally by the reference numeral 10 and includes a rigid upper 11 and a rigid lower 12, both of which advantageously may be carved out of separate solid blocks of wood, as indicated in the drawings, or, alternatively, both of which may be carved out of a single block of wood or injection molded as a single or two plastic components.
  • the outer surfaces of the upper and lower are contiguous and the side edges are flush with one another to give the shoe the appearance of being formed from a single element, as, of course, is the case with a conventional Dutch shoe. That is to say, the upper 11 and the lower 12 appear to be integral, in accordance with the invention, whether or not they are, in fact, derived from a solid block of wood, two blocks of wood, or one or more plastic elements.
  • the upper I1 and lower 12 are joined to one another by an adhesive 12 along a peripheral joint 14.
  • the lower 12 is of thick dimension and defines a heel l5 and sole 16 separated by an arch 17.
  • the upper surfaces 18 of the lower 12 are contoured and define an insole upon which the foot of the wearer will rest as will be understood.
  • the rearmost edges of the upper 11 are disposed in a plane which makes a blunt angle with the insole 18.
  • the upper terminates at the beginning of the heel portions 15 of the lower 12.
  • the backless clog includes a liner 30 of resilient polyurethane foam which reduces the oversized foot cavity defined between the inner surfaces of the upper 1 l and the insole 18 to a foot space which, by nature of the configuration and resiliency of the special liner 30, will snugly and comfortably accommodate all widths of a given foot size.
  • the liner 30 of the invention is derived from a bell-shaped blank 31 of polyurethane foam which has its side edges effectively skived by a line of stitching 32 running adjacent a periphery thereof. The stitching 32 tends to compress and reduce the thickness of the peripheral portions of the blank 31 so that it may readily conform itself to the corners where the upper and lower meet.
  • the remaining edge of the blank is reinforced and embraced by a leather collar 33 which is secured thereto by stitching 36.
  • the collar 33 will provide a comfortable wear surface for the arched entrance to the shoe, as shown in FIG. 3, as well as providing a reduction in thickness of the liner immediately adjacent the opening to the shoe.
  • the rearmost portions of the upper 11 and the lining 30 associated therewith define a keyhole" opening 35 having vertical dimensions which are greater than and horizontal dimensions which are less than the normal full width dimensions of the foot size for which the particular clog is intended.
  • the sizing and shaping of the upper 11 and the liner 30 are such that upon insertion of the liner into the shoe, in a manner to be described in greater detail hereinafter, the liner folds and is compressed along an asymmetrical axis 37 providing a foot opening specifically shaped for a left or a right foot. That is to say and referring to FIG. 7, the foot opening 35 in canted toward the instep side, providing a right shoe.
  • the contour of the insole is also appropriately rightfooted or leftfooted for each shoe.
  • the overstuffed foam liner tends to lock the new clog onto the foot of the user by trapping the normal arch of the foot and the remaining portions of the foot between the contoured insole and the foam lining 30.
  • the foam lining 30 is oversized, although it is resilient and deformable, it is necessary, in accordance with the principles of the invention, to rotate the foot of a user into a vertical or inclined plane to get the widest dimension of the foot through the narrow vertical opening or throat defined by pillow" portions 38, 39 straddling the fold 37 and by the rearmost portions of the upper. Thereafter, when the widest part of the foot clears the throat and enters the wider portions of the upper disposed forwardly of the opening 35, it cannot be readily withdrawn by a rearward motion after it is returned to a horizontal plane. In other words and as shown in FIGS. 2 and 7, the rearmost portions of walls 1?, 20 are more closely mutually spaced than intermediate wall portions.
  • the height of the upper wall 21 or its spacing from the insole 18 is sufficient to accommodate insertion ofa twisted foot having predetermined width dimensions, but the spacing of the rearmost portions of upper walls 19, 20 are less than that maximum dimension and do not accommodate the insertion or withdrawal of a foot in its normal flat position or horizontal position.
  • this unique construction enables a clog to be held securely and comfortably on the foot of a user. Importantly, the twist and straighten entry and locking of the foot is facilitated enormous and the styling of the clog is accentuated by the elimination ofa back. 7
  • the new foam lining is inserted in the rigid clog 10 by folding the blank 31 twice upon itself along the Y-Y and then along the X-X axes, as indicated in fig. 5, to form a compressed and four layer subassembly 40 generally having a heart-shaped profile (FIG. 5) which is sufficiently compact to be inserted into the mouth of the clog, as indicated in FIG. 6.
  • the entrance arch 41 of the upper and other areas of the inner surfaces 11a of the upper may be coated with adhesive 42, as will be understood.
  • the subassembly 40 is inserted into the upper and is opened down to the toe of the shoe, and the bead or skived edges opened into contact with the edges.
  • the geometry and size of the liner will overstuff the shoe, as indicated in FIGS. 2, 3 and 7.
  • the skived or effectively skived peripheral portions of the liner are adhered at the interface of the upper and lower along the joint 14, remaining contacting portions of the liner are adhered at the inner surfaces 1 1a of the upper 1 1, and the collar 33 is adhered to the arch 41.
  • the blank 31 is oversized in terms of area, in comparison to the upper area 11a, the lining foam 30, as indicated in FIG.
  • the clogs of the present invention may be varied slightly in shape and construction without departing from the principles of the present invention.
  • the present construction accommodates the sizing of shoes in regular whole sizes, without any regard to width or to halfsizes, inasmuch as the resilient foam liners will accommodate any width of given shoe size and slight variations in length quite comfortably.
  • the configuration of the upper and the overstuffed nature of the liner it may be possible in certain cases to accommodate a series of whole sizes as well as a series of widths of feet for a given size clog.
  • a backless clog for a predetermined foot size com prising a rigid, solid lower having contoured upper surfaces adapted to support the toes, ball, instep, and heel of a human foot of said predetermined size comfortably thereupon;
  • said lower having forward and rearward bottom surfaces definitive of an inflexible sole and an inflexible heel, respectively, separated by an arch;
  • said upper having contoured inner surfaces of predetermined area substantially larger than the area required to cover the forward portions of a foot of said predetermined foot size and cooperative with said lower to form an oversized liner receiving space;
  • a resilient foam liner means disposed in said liner receiving space and effectively reducing the same to a foot receiving space snugly accommodative of a foot of said predetermined size
  • said clog may be securely and comfortably held to the foot of the wearer by the snug enclosure of the forward portions of the foot by said foam, said upper, and said lower.
  • a reinforcing collar is secured to the rearward edges thereof.
  • said collar is a sheet material having the characteristics of leather.
  • the clog of claim 1 which includes a resilient, non-skid sole wear surface and a resilient, non-skid heel wear surface attached to the bottom surfaces of said sole and heel portions, respectively, of said lower.
  • said foot is adapted] to be locked in said clog by the insertion of said foot thereinto with the sole thereof at an angle to the plane of said lower and the subsequent rotation. of said foot into a plane generally parallel with that of said lower.
  • a. said keyhole opening is a narrow, vertical slot having a width dimension at the lowermost portions of said opening less than the maximum full width dimension of said predetermined foot size.
  • a method of manufacturing a clog for a predetermined foot size including the steps of clog having the general appearance ofa w0oden".

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  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
US00231505A 1972-03-03 1972-03-03 Backless clog construction Expired - Lifetime US3729840A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US23150572A 1972-03-03 1972-03-03

Publications (1)

Publication Number Publication Date
US3729840A true US3729840A (en) 1973-05-01

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Application Number Title Priority Date Filing Date
US00231505A Expired - Lifetime US3729840A (en) 1972-03-03 1972-03-03 Backless clog construction

Country Status (14)

Country Link
US (1) US3729840A (fr)
JP (1) JPS5541761B2 (fr)
AU (1) AU473852B2 (fr)
BE (1) BE793449A (fr)
CA (1) CA962452A (fr)
CH (1) CH567381A5 (fr)
DE (1) DE2260364A1 (fr)
FI (1) FI54047C (fr)
FR (1) FR2174492A5 (fr)
GB (1) GB1403898A (fr)
IT (1) IT975712B (fr)
NL (1) NL7216044A (fr)
NO (1) NO134357C (fr)
SE (1) SE381800B (fr)

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0044086A1 (fr) * 1980-07-15 1982-01-20 Israel Melcer Semelle en matériau rigide, en particulier en bois, et chaussures comportant une telle semelle
USD404554S (en) * 1998-04-30 1999-01-26 Skechers U.S.A., Inc. Shoe upper
USD404905S (en) * 1998-05-23 1999-02-02 Skechers U.S.A., Inc. Shoe upper
USD409364S (en) * 1998-09-08 1999-05-11 Skechers U.S.A., Inc. Shoe upper
USD411246S (en) 1998-10-23 1999-06-22 Skechers U.S.A., Inc. Shoe upper
USD415877S (en) 1998-11-06 1999-11-02 Skechers U.S.A., Inc. Shoe upper
USD416128S (en) 1999-04-22 1999-11-09 Skechers U.S.A., Inc. Shoe upper
USD418283S (en) * 1999-05-14 2000-01-04 Skechers U.S.A., Inc. Shoe upper
USD419756S (en) * 1999-03-16 2000-02-01 Skechers U.S.A., Inc. Shoe upper
USD420211S (en) * 1998-09-08 2000-02-08 Skechers U.S.A., Inc. Shoe upper
USD420498S (en) * 1999-03-16 2000-02-15 Skechers U.S.A., Inc. Shoe upper
USD421835S (en) * 1999-01-07 2000-03-28 Skechers U.S.A., Inc. Shoe upper
USD422403S (en) * 1999-04-23 2000-04-11 Skechers U.S.A., Inc. Shoe upper
USD423204S (en) * 1999-03-16 2000-04-25 Skechers U.S.A., Inc. Shoe upper
USD424290S (en) * 1999-03-16 2000-05-09 Skechers U.S.A., Inc. Shoe upper
USD431712S (en) * 2000-02-01 2000-10-10 Skechers U.S.A., Inc., Ii Shoe upper
USD435959S1 (en) 2000-07-10 2001-01-09 Skechers U.S.A., Inc., Ii Shoe upper
USD439734S1 (en) 2000-02-08 2001-04-03 Skechers U.S.A., Inc., Ii Shoe upper
USD441417S1 (en) 2000-08-15 2001-05-01 Skechers U.S.A., Inc., Ii Shoe upper
USD446919S1 (en) 1999-10-14 2001-08-28 Skechers U.S.A., Inc. Ii Shoe upper
USD446918S1 (en) 1999-10-14 2001-08-28 Skechers U.S.A., Inc. Ii Shoe upper
US20050223594A1 (en) * 2004-04-07 2005-10-13 Issler David C One-piece shoe construction with improved ventilation
US20130247416A1 (en) * 2012-03-22 2013-09-26 Nike, Inc. Restraint Configured to Allow Relative Heel/Forefoot Motion
CN106015215A (zh) * 2016-08-19 2016-10-12 天津市展特装饰工程有限公司 板材的拼接结构及其加工方法
US9936759B2 (en) 2012-03-22 2018-04-10 Nike, Inc. Footwear and foot support member configured to allow relative heel/forefoot motion
USD860596S1 (en) * 2016-11-21 2019-09-24 Birkenstock Sales GmbH Footwear
USD1002990S1 (en) * 2020-10-29 2023-10-31 Pavan S.P.A Snack
USD1012419S1 (en) * 2020-10-29 2024-01-30 Pavan S.P.A. Snack

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2759550B1 (fr) * 1997-02-19 1999-03-26 Oxypas Article chaussant en forme de sabot

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US154592A (en) * 1874-09-01 Improvement in wooden shoes
FR875918A (fr) * 1941-10-08 1942-10-08 Protège-pieds, sabots, semelles, etc. à ossature métallique
US2755567A (en) * 1955-06-15 1956-07-24 Ruth L Rudine Hollow plastic clogs

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US154592A (en) * 1874-09-01 Improvement in wooden shoes
FR875918A (fr) * 1941-10-08 1942-10-08 Protège-pieds, sabots, semelles, etc. à ossature métallique
US2755567A (en) * 1955-06-15 1956-07-24 Ruth L Rudine Hollow plastic clogs

Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1982000245A1 (fr) * 1980-07-15 1982-02-04 I Melcer Semelle en materiau rigide, en particulier en bois, et chaussures et bottes equipees de cette semelle
EP0044086A1 (fr) * 1980-07-15 1982-01-20 Israel Melcer Semelle en matériau rigide, en particulier en bois, et chaussures comportant une telle semelle
USD404554S (en) * 1998-04-30 1999-01-26 Skechers U.S.A., Inc. Shoe upper
USD404905S (en) * 1998-05-23 1999-02-02 Skechers U.S.A., Inc. Shoe upper
USD420211S (en) * 1998-09-08 2000-02-08 Skechers U.S.A., Inc. Shoe upper
USD409364S (en) * 1998-09-08 1999-05-11 Skechers U.S.A., Inc. Shoe upper
USD411246S (en) 1998-10-23 1999-06-22 Skechers U.S.A., Inc. Shoe upper
USD415877S (en) 1998-11-06 1999-11-02 Skechers U.S.A., Inc. Shoe upper
USD421835S (en) * 1999-01-07 2000-03-28 Skechers U.S.A., Inc. Shoe upper
USD419756S (en) * 1999-03-16 2000-02-01 Skechers U.S.A., Inc. Shoe upper
USD420498S (en) * 1999-03-16 2000-02-15 Skechers U.S.A., Inc. Shoe upper
USD423204S (en) * 1999-03-16 2000-04-25 Skechers U.S.A., Inc. Shoe upper
USD424290S (en) * 1999-03-16 2000-05-09 Skechers U.S.A., Inc. Shoe upper
USD416128S (en) 1999-04-22 1999-11-09 Skechers U.S.A., Inc. Shoe upper
USD422403S (en) * 1999-04-23 2000-04-11 Skechers U.S.A., Inc. Shoe upper
USD418283S (en) * 1999-05-14 2000-01-04 Skechers U.S.A., Inc. Shoe upper
USD446919S1 (en) 1999-10-14 2001-08-28 Skechers U.S.A., Inc. Ii Shoe upper
USD446918S1 (en) 1999-10-14 2001-08-28 Skechers U.S.A., Inc. Ii Shoe upper
USD431712S (en) * 2000-02-01 2000-10-10 Skechers U.S.A., Inc., Ii Shoe upper
USD439734S1 (en) 2000-02-08 2001-04-03 Skechers U.S.A., Inc., Ii Shoe upper
USD435959S1 (en) 2000-07-10 2001-01-09 Skechers U.S.A., Inc., Ii Shoe upper
USD441417S1 (en) 2000-08-15 2001-05-01 Skechers U.S.A., Inc., Ii Shoe upper
US20050223594A1 (en) * 2004-04-07 2005-10-13 Issler David C One-piece shoe construction with improved ventilation
US7146750B2 (en) 2004-04-07 2006-12-12 Columbia Insurance Company One-piece shoe construction with improved ventilation
US10201210B2 (en) * 2012-03-22 2019-02-12 Nike, Inc. Restraint configured to allow relative heel/forefoot motion
US20130247416A1 (en) * 2012-03-22 2013-09-26 Nike, Inc. Restraint Configured to Allow Relative Heel/Forefoot Motion
US9936759B2 (en) 2012-03-22 2018-04-10 Nike, Inc. Footwear and foot support member configured to allow relative heel/forefoot motion
CN106015215A (zh) * 2016-08-19 2016-10-12 天津市展特装饰工程有限公司 板材的拼接结构及其加工方法
CN106015215B (zh) * 2016-08-19 2023-09-22 天津市展特工程科技有限公司 板材的拼接结构及其加工方法
USD860596S1 (en) * 2016-11-21 2019-09-24 Birkenstock Sales GmbH Footwear
USD1002990S1 (en) * 2020-10-29 2023-10-31 Pavan S.P.A Snack
USD1012419S1 (en) * 2020-10-29 2024-01-30 Pavan S.P.A. Snack

Also Published As

Publication number Publication date
AU473852B2 (en) 1976-07-08
FI54047C (fi) 1978-10-10
NO134357C (fr) 1976-09-29
DE2260364A1 (de) 1973-09-06
FR2174492A5 (fr) 1973-10-12
JPS5541761B2 (fr) 1980-10-27
AU4812972A (en) 1974-04-26
NO134357B (fr) 1976-06-21
CA962452A (en) 1975-02-11
CH567381A5 (fr) 1975-10-15
SE381800B (sv) 1975-12-22
NL7216044A (fr) 1973-09-06
IT975712B (it) 1974-08-10
FI54047B (fi) 1978-06-30
BE793449A (fr) 1973-04-16
GB1403898A (en) 1975-08-28
JPS4961A (fr) 1974-01-05

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