Quick-coupling part arrangement
AssigneeDart Engineering AG
InventorThure Ekman
Life of this patent
Estimating the term…
Abstract
A first quick-coupling part can be brought into interaction with a second quick-coupling part via an interaction portion. The quick-coupling parts are held together with locking members. The interaction portion is designed with a surface layer which brings about an essentially crack-free flexibility for the locking members in spite of high actuating forces. One or more underlying layer(s) has (have) greater hardness than the surface layer, and the combination of said layers gives the necessary resistance against high media pressure.
Claims12
A quick coupling connection between first (4) and second (1) coupling means which are in sliding relation to each other comprising:
- said first coupling means (4) supporting thereon at least one bearing element (5),
- said second coupling member (1) having at least one means (7) for engaging with said at least one bearing element when said first and second coupling means are in their coupled relation,
- said engaging means (7) being a steel engaging means and having, at least at its surface layer which contacts said at least one bearing element (5), greater elasticity than at its at least one underlying layer, said greater elasticity being provided by changing chemical composition of the steel forming said engaging means,
- whereby the elasticity of the surface layer of said engaging means (7) provides increased surface contact between said at least one bearing element (5) as said bearing element (5) is pressed with greater force against said engaging means (7) of said second coupling member (1).
A quick coupling for fluids at high pressure comprising:
- a first female coupling member (4) and a second male coupling member (1) in close sliding relation to each other;
- said male coupling member having at least one annular recess (7) of machine steel for supporting therein a plurality of substantially spherical locking members (5) to permit releasable coupling of said first and second coupling members;
- said male coupling member (5) being formed from a material having a predetermined softness at an outer surface of said annular recess but having increased hardness at increased depth of said annular recess.
Dependencies are inferred from the claim text.