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  Shoe system with a resilient shoe insertUSPTO Application #: 20060048411Title: Shoe system with a resilient shoe insert Abstract: The method is for using a shoe system having a resilient shoe insert. A shoe (300) has a shoe insert (500) disposed inside the shoe. The insert has an upper leg (506) and a lower leg (514) connected by a front end (502) with a curvature (512). The legs (506, 514) have a concave segments (510, 518) and end points (520, 522), respectively; A load is put on the insert to compress the end points towards one another. This shortens the effective length of the legs (506, 514) because the legs are in contact at a contact segment (524). This makes the insert stiffer the more it is compressed. The effective length of the legs is shorter at the outside (530) compared to the inside (532) so that the outside is stiffer than the inside. (end of abstract)
Agent: Fasth Law Offices (rolf Fasth) - Southern Pines, NC, US Inventors: Wilhelm Ove Lindqvist, Hans Larsson, Leif Lindh, Kjell Lindh USPTO Applicaton #: 20060048411 - Class: 036027000 (USPTO) Related Patent Categories: Boots, Shoes, And Leggings, Soles, Spring Heel The Patent Description & Claims data below is from USPTO Patent Application 20060048411. Brief Patent Description - Full Patent Description - Patent Application Claims
TECHNICAL FIELD [0001] The present invention relates to a resilient shoe spring system that is intergrated with a shoe system. BACKGROUND AND SUMMARY OF THE INVENTION [0002] Users and developers of elastic shoes and shoe soles are confronted with the problem of back injury and releasing the stored energy in the shoe sole in a manner which improves walking and running economy while at the same time achieving adequate bio-mechanical shoe stability and cushioning. Many shoe manufacturers have concentrated their effort on chock absorption by permanently increasing the thickness of the shoe sole. This has resulted in a slight change of the angle between the ankle and the foot that may weaken the tendons of the foot. This change of the angle may also lead to instability and reduced bio-mechanical effect. [0003] Many efforts have been made to develop an effective spring mechanism for shoes or shoe soles. However, the earlier proposed spring designs for shoe soles have not been entirely satisfactory. Despite many elaborate shoe sole solutions, back injuries and other injuries are still common due to poorly designed shoes. Injuries due to poor shoe designs are particularly common in sports and heavy duty work activities. [0004] One important function of a shoe, such as a running shoe, is to protect the foot from the stresses of running. The forces and motions that occur in different sports vary greatly. Because of these differences it is important that active participation in varied sports require varied shoes. For example, tennis and other racquet sports require much side-to-side motion and the shoe must provide lateral stability. If the shoe is unstable and has high heel elevation when the athlete is moving from one side to another the likelihood is great the athlete may suffer an ankle sprain. The majority of conventional shoes are not well designed. Some of insufficiencies of the current shoe designs may be overcome by the present invention. [0005] The method and shoe system of the present invention provide a solution to the above-mentioned problems. More particularly, the method is for using a shoe system having a resilient shoe insert. A shoe has a shoe insert disposed inside the shoe. The insert has an upper leg and a lower leg connected by a front end with a curvature. The upper and lower legs 506 have a concave segments and end points. A load is put on the insert to compress the end points towards one another. This shortens the effective length of the legs because the legs are in contact at a contact segment. This makes the insert stiffer the more it is compressed. The effective length of the legs is shorter at the outside compared to the inside so that the outside is stiffer than the inside. BRIEF DESCRIPTION OF THE DRAWINGS [0006] FIG. 1 is a side view of a shoe insert of the present invention; [0007] FIG. 2 is a side view of a shoe adapted to receive the shoe insert of FIG. 1; [0008] FIG. 3 is a rear view of the shoe in a vertical position along line 3-3 of FIG. 2 with the shoe insert of FIG. 1 placed inside the shoe; [0009] FIG. 4 is a rear view of the shoe along line 3-3 of FIG. 2 when the ankle is disposed in an inwardly sloping position; [0010] FIG. 5 is a side view of a person standing straight up on the shoe of the present invention; [0011] FIG. 6 is a side view of a person standing on the shoe and leaning forward; [0012] FIG. 7 is a side view of an alternative embodiment of the shoe insert of the present invention; [0013] FIG. 8 is a top view of the shoe insert; [0014] FIG. 9. is a top view of a second embodiment of a shoe insert for the right shoe; [0015] FIG. 10 is a top view of the second embodiment of the shoe insert for the left shoe; [0016] FIG. 11 is a bottom view of a third embodiment of a shoe insert; [0017] FIG. 12 is a side view of a fourth embodiment of a shoe insert; [0018] FIG. 13 is a side view of a fifth embodiment of a shoe insert integrated with a shoe sole; [0019] FIG. 14 is a side view of the fifth embodiment of the shoe insert in a compressed position; [0020] FIGS. 15A-D are schematic flow diagrams of a pressing technique for manufacturing the shoe insert; [0021] FIG. 16 is a top view of a sixth embodiment of the shoe insert of the present invention; Continue reading... Full patent description for Shoe system with a resilient shoe insert Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Shoe system with a resilient shoe insert patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Shoe system with a resilient shoe insert or other areas of interest. ### Previous Patent Application: Cantilevered shoe construction Next Patent Application: Article of footwear having an upper with a structured intermediate layer Industry Class: Boots, shoes, and leggings ### FreshPatents.com Support Thank you for viewing the Shoe system with a resilient shoe insert patent info. 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