SE516110C2

SE516110C2 - Ferrule

Info

Publication number: SE516110C2
Application number: SE0003774A
Authority: SE
Inventors: Staffan Skeppstedt; Karl Peter Olsson
Original assignee: Person Och Organisationspoetik
Priority date: 2000-10-18
Filing date: 2000-10-18
Publication date: 2001-11-19
Also published as: ATE318529T1; AU2001292525A1; WO2002032252A1; EP1326505A1; WO2002032252A8; SE0003774D0; SE0003774L; EP1326505B1; DE60117586T2; DE60117586D1

Abstract

A ferrule for a stick or crutch consists essentially of rubber and includes a support body (2) and a sleeve (3) connecting with said body. The sleeve (3) is grooved or fluted circumferentially with crests and troughs of the grooves extending generally parallel with the sleeve axis. The end-part (31) of the sleeve (3) connecting with the support body (2) increases in diameter in a direction towards the supporting body (2).

Description

20 25 30 35 .5162110 I en för närvarande föredragen utföringsform av uppfinningen har hylsan i sitt till kroppen anslutande enda avsnitt en mot kroppen tilltagande diameter. Vidare är hylsan utformad med en veckad vägg, där veckningens toppar och dalar sträcker sig väsentligen parallella med hylsans axel. Genom veckningens orientering blir hylsan relativt böjstyv och erbjuder därigenom en stadig anslutning av doppskon och speciellt dess stödkropp till skaftänden, samtidigt som hylsan enkelt kan anpassas till skaftändar av varierande diametrar och former. Genom att hyl- sans till stödkroppen anslutande ändparti vidgar sig mot stöd- kroppen, uppträder inga besvärande materialpåkänningar i hyls- väggen i närheten av stödkroppen. In a presently preferred embodiment of the invention, the sleeve in its only section connecting to the body has an increasing diameter to the body. Furthermore, the sleeve is formed with a folded wall, where the peaks and valleys of the fold extend substantially parallel to the axis of the sleeve. Due to the orientation of the fold, the sleeve becomes relatively flexurally rigid and thereby offers a stable connection of the dipping shoe and especially its support body to the shaft end, at the same time as the sleeve can easily be adapted to shaft ends of varying diameters and shapes. Because the end portion of the sleeve connecting to the support body widens towards the support body, no troublesome material stresses occur in the sleeve wall in the vicinity of the support body.

Doppskon, speciellt dess stödkropp kan i övrigt ha ett utförande av den art som framgår av svensk patentansökan 9903197-3.The immersion shoe, especially its support body, may otherwise have a design of the kind set out in Swedish patent application 9903197-3.

Uppfinningens grundtanke kan anses ligga i att hylsväggen eta- bleras av ett flertal làngsträckta ribbor som är åtskilda runt hylsans omkrets och som är riktade väsentligen i hylsans axel- riktning varvid närliggande ribbor är inbördes sammanhàllna av materialbryggor vilka väsentligen utbreder sig utmed ribbornas längd och vilka är anordnade att i omkretsled erbjuda ett väsentligt lägre töjningsmotstånd än ribborna. I föredragna utföringsformer av uppfinningen kan materialbryggorna därvid ha ett tvärsnitt som är allmänt U-formade så att deras skänklar kan böjas isär från varandra med ett relativt lågt motstånd då hylsans diameter skall vidgas. Materialbryggornas bottenliv kan därvid bilda ytterligare ribbor.The basic idea of the invention can be considered to lie in that the sleeve wall is established by a plurality of elongate ribs which are separated around the circumference of the sleeve and which are directed substantially in the axial direction of the sleeve, adjacent ribs being interconnected by material bridges which extend substantially along ribs. arranged to offer a substantially lower elongation of resistance than the ribs. In preferred embodiments of the invention, the material bridges can then have a cross section which is generally U-shaped so that their legs can be bent apart from each other with a relatively low resistance when the diameter of the sleeve is to be widened. The bottom life of the material bridges can then form further ribs.

Ett utföringsexempel på uppfinningen kommer i det följande att beskrivas i exempelform med hänvisningen till den bilagda rit- ningen.An embodiment of the invention will now be described, by way of example, with reference to the accompanying drawings.

Fig 1 visar en sidovy av doppskon enligt uppfinningen.Fig. 1 shows a side view of the immersion shoe according to the invention.

Fig 2 visar en ändvy mot doppskons hylsa. 10 15 20 25 30 35 _5115 lm Fig 3 visar en ändvy mot doppskons stödkropp.Fig. 2 shows an end view against the sleeve of the immersion shoe. 10 15 20 25 30 35 _5115 ch Fig. 3 shows an end view towards the support body of the immersion shoe.

Fig 4 visar schematiskt en axialsektion genom doppskon.Fig. 4 schematically shows an axial section through the immersion shoe.

Doppskon 1 innefattar en stödkropp 2 och en därtill ansluten hylsa 3. Hylsan 3 har i sin till kroppen 2 anslutande del 31 en innerdiameter som är tilltagande i riktning mot kroppen 2. Av fig 2 framgår att hylsans 3 vägg har väsentligen axiellt rik- tade urtagningar 31, 32 på hylsans innervägg respektive ytter- vägg. Urtagningarna 31, 32 alternerar i hylsans omkretsriktning och ger hylsan 3 en veckad konfiguration som betraktat på fig 2. Hylsan 3 kan därvid anses bestå av ett antal ribbor 40 som är parallella och åtskilda i omkretsled och är väsentligen axiellt riktade. Ribborna är inbördes förbundna av material- bryggor 41 vilka kan anses vara i huvudsak U-formiga i avbild- ningen enligt fig 2. Åtminstone hylsan 3 bestàr av ett gummi- elastiskt material och har i avlastat tillstànd den på fig 2 visade konfigurationen. När man skall montera doppskon 1 på en skaftände med en större ytterdiameter än den avlastade hylsans 3 fria innerdiameter, kommer materialbryggorna 41 att böjas med relativt ringa kraftansättning, så att doppskons hylsa 3 kan emotta skaftändar inom ett relativt stort diameterområde.The immersion shoe 1 comprises a support body 2 and a sleeve 3 connected thereto. The sleeve 3 has in its part 31 connecting to the body 2 an inner diameter which is increasing in the direction of the body 2. From Fig 31, 32 on the inner wall and outer wall of the sleeve, respectively. The recesses 31, 32 alternate in the circumferential direction of the sleeve and give the sleeve 3 a pleated configuration as seen in Fig. 2. The sleeve 3 can then be considered to consist of a number of ribs 40 which are parallel and separated in circumferential direction and are substantially axially directed. The ribs are interconnected by material bridges 41 which can be considered to be substantially U-shaped in the view according to Fig. 2. At least the sleeve 3 consists of a rubber-elastic material and has in the relieved condition the configuration shown in Fig. 2. When mounting the immersion shoe 1 on a shaft end with a larger outer diameter than the free inner diameter of the unloaded sleeve 3, the material bridges 41 will be bent with a relatively small force application, so that the immersion shoe sleeve 3 can receive shaft ends within a relatively large diameter range.

De väsentligen U-formade materialbryggorna 41 kan anses omfatta ett liv och till livet anslutna skänklar vilka vid sin motsatta ände också är godsfast anslutna till ribborna 40. Bryggornas liv kan också anses utgöra ribbor.The substantially U-shaped material bridges 41 can be considered to comprise a waist and legs connected to the waist which at their opposite end are also fixedly connected to the ribs 40. The life of the bridges can also be considered to constitute ribs.

I en variant av det visade utförandet kan materialbryggorna 41 utgöras av relativt tunt material som genom töjning medger diametervidgning av hylsan 3. Företrädesvis har dock hylsan 3 en veckad konfiguration som medger vidgning av hylsans diameter genom utböjning av materialbryggorna 41.In a variant of the embodiment shown, the material bridges 41 can consist of relatively thin material which, by elongation, allows diameter expansion of the sleeve 3. Preferably, however, the sleeve 3 has a pleated configuration which allows expansion of the diameter of the sleeve by deflection of the material bridges 41.

Av fig 1 och 4 framgår att hylsan 3 har en väsentligen konstant diameter utmed sin längd ända fram till partiet 31 där hylsans 10 15 i 516 4110 innerdiameter vidgas i riktning mot stödkroppen 2. Stödkroppens inneryta är företrädesvis försedd med en metallbricka 22.From Figs. 1 and 4 it can be seen that the sleeve 3 has a substantially constant diameter along its length all the way to the portion 31 where the inner diameter of the sleeve 10 in 516 4110 widens towards the support body 2. The inner surface of the support body is preferably provided with a metal washer 22.

Väggens 3 diameterökning mot kroppen 2 definierar ett diameter- område för skaftändar som kan emottas utan att farliga krafter uppträder i anslutningen mellan väggen 3 och kroppen 2.The diameter increase of the wall 3 towards the body 2 defines a diameter range for shaft ends that can be received without dangerous forces appearing in the connection between the wall 3 and the body 2.

Av fig 2 framgår att skårorna 32 sträcker sin även utmed hyl- sans 3 diametervidgade parti fram till kroppen 2. De inre skårorna 31 sträcker sig på motsvarande vis företrädesvis också fram till kroppen 2 i närheten av stödbrickan 22.From Fig. 2 it can be seen that the grooves 32 extend also along the diameter 3 of the sleeve 3 to the body 2. The inner grooves 31 correspondingly also extend to the body 2 in the vicinity of the support washer 22.

Av fig 3 framgår att stödkroppens 2 mot underlaget vända sida är konvex och har ett antal runt doppskons axel U-formigt för- delade stödytor vilka parvis har en total bredd i omkrets- riktningen vilken ökar med avståndet från doppskons axel.From Fig. 3 it can be seen that the side of the support body 2 facing the ground is convex and has a number of U-shaped distributed support surfaces around the axis of the immersion shoe which in pairs have a total width in the circumferential direction which increases with the distance from the immersion shoe axis.

Claims

10 15 20 25 30 35 5165110 P A T E N T K R A V

1. A dipping shoe for a ground-supporting end of a shaft belonging to a support cane, a support crutch or the like, the dipping shoe essentially consisting of a resilient elastic material such as rubber, which offers a high friction to the ground and wherein the dipping shoe comprises a support body (2 ) with a sleeve (3) connected thereto in which the shaft end can be inserted to support against the support body, characterized in that the wall of the sleeve (3) is substantially formed by a plurality of elongate ribs (40) which are separated around the circumference of the sleeve (3) and which are directed substantially in the axial direction of the sleeve (3), and that adjacent ribs (40) (41) which extend substantially along the length of the ribs (40) and are interconnected by material bridges are arranged to offer a substantially lower elongation of elongation than the ribs ( 40).

Dipping shoe according to claim 1, characterized in that the material bridges are U-shaped to be bent substantially in the normal plane to the sleeve, in the event of a change in the free inner diameters of the sleeve.

Dipping shoe according to claim 1 or 2, characterized in that the sleeve is formed with a substantially constant wall thickness along its length and that the sleeve has an end portion (31) adjoining the support body (2) which has an increasing inner diameter in the direction of the support body (2). ).

Dipping shoe according to one of Claims 1 to 3, characterized in that the material bridges are substantially U-shaped, as viewed in a normal plane to the axis of the sleeve (3).

Dipping shoe according to claim 4, characterized in that the material bridges (41) and the ribs (40) are defined by substantially axially directed recesses in the inner surface and outer surface of the sleeve (3). 515 1610

Dipping shoe according to one of Claims 1 to 5, characterized in that the support body (2) has on its inside a support washer (22) which distributes the load from the shaft end to the support body.

Dipping shoe according to one of the preceding claims, characterized in that the wall of the sleeve (3) is folded circumferentially, the ridges and valleys of the fold being directed substantially parallel to the axis of the sleeve.