Connection of two members shrunk on each other

Claim 2

A connection of two members of which the first comprises a cylindrical fitting surface on its inner circumference and is shrunk on the second member which comprises a cylindrical fitting surface on its outer circumference, an annular chamber being present in at least one of the members at the area of said fitting surfaces, through which chamber a first liquid supply duct communicates with the atmosphere, the parts of the fitting surface present on either side of the chamber having the same dimensions viewed in the axial direction, characterized in that the second member changes, on at least one of its two sides, into a part of the outside diameter of which differs from that of the fitting surface on said second member, said part being surrounded by a part of the first member having an inside diameter which is slightly larger than the outside diameter of the said part of the second member, one of the said parts comprising a groove-shaped recess in which a flexible sealing element, preferably an O-ring, can be provided, a second liquid supply duct debouching between the transition in diameter and the recess, the other end of said duct communicating with the atmosphere, the said diameter transition being such that, viewed in the direction of mounting, the various parts of the connection show an increasing diameter, and wherein said first member comprises on its outer circumference at the area of the transition in diameter a grooveshaped recess extending throughout the circUmference.

Claim 3

For use with a supply of pressurized fluid, a pair of shaft and cylinder members, each having first and second axially spaced parts of different diameters to permit relative axial translation for disassembly, with a transitional area between the first and second parts of each member, the two first parts of the shaft and cylinder respectively having adjacent circumferential contact surfaces corresponding in diameter for a shrink -fit connection to each other, at least one of said contact surfaces of the two first parts formed to define a first annular chamber between said surfaces, this chamber defining axially spaced end-surfaces and radially spaced side-surfaces, and each end-surface of any one member being adjacent a corresponding end-surface only of the same member, the shaft further including an internal duct having a first opening in said contact surface thereof for communication with said chamber and a second opening connectible to said fluid supply, said two members having adjacent surfaces at said transitional area which surfaces define between them a second annular chamber having radially spaced side-surfaces and axially spaced end-surfaces, with at least one end-surface of one member being adjacent a corresponding end-surface of the other member, said shaft further including a second internal duct having a first opening connectible to said fluid supply, and a second opening in said second annular chamber whereby fluid is conductible via said first duct to said first annular chamber for applying radial forces between said shrink fit connection to release said members, and fluid is conductible via said second duct to said second chamber for applying both radial and axial forces between said two members for separating same, at least one of said adjacent surfaces at said transitional area also having an annular groove therein forming part of said second annular chamber.

Claim 4

For use with a supply of pressurized fluid, a pair of shaft and cylinder members, each having first and second axially spaced parts of different diameters to permit relative axial translation for disassembly, with a transitional area between the first and second parts of each member, the two first parts of the shaft and cylinder respectively having adjacent circumferential contact surfaces corresponding in diameter for a shrink -fit connection to each other, at least one of said contact surfaces of the two first parts formed to define a first annular chamber between said surfaces, this chamber defining axially spaced end-surfaces and radially spaced side-surfaces, and each end-surface of any one member being adjacent a corresponding end-surface only of the same member, the shaft further including an internal duct having a first opening in said contact surface thereof for communication with said chamber and a second opening connectible to said fluid supply, said two members having adjacent surfaces at said transitional area which surfaces define between them a second annular chamber having radially spaced side-surfaces and axially spaced end-surfaces, with at least one end-surface of one member being adjacent a corresponding end-surface of the other member, said shaft further including a second internal duct having a first opening connectible to said fluid supply, and a second opening in said second annular chamber whereby fluid is conductible via said first duct to said first annular chamber for applying radial forces between said shrink fit connection to release said members, and fluid is conductible via said second duct to said second chamber for applying both radial and axial forces between said two members for separating same, at least one of said adjacent surfaces at said transitional area also having an annular groove therein forming part of said second annular chamber.

Claim 5

For use with a supply of pressurized fluid, a pair of cylinder and shaft members respectively having inner and outer first circumferential surfaces for contact in a shrink fit, at least one of said surfaces formed to define an annular space therebetween, and the shaft including a first duct connecting said annular space with a first inlet, said cylinder and shaft members respectively having inner and outer second circumferential surfaces having diameters corresponding to define a clearance space between them, and also means disposed in said clearance space forming a seal between said members, each of said members having a transitional area between the first and second surfaces thereof defined by a stepped portion, the two transitional areas defining a second annular space therebetween, this second space defined by axially spaced end-surfaces and radially spaced side-surfaces, at least one end-surface of one member being adjacent a corresponding end-surface of the other member, the shaft having a second duct connecting said second annular space with a second inlet, whereby fluid is conductible via said first duct to said first annular chamber for applying radial forces between said shrink fit connection to release said members, and fluid is conductible via said second duct to said second chamber for applying both radial and axial forces between said two members for separating them at least one of said members at said stepped portion having an annular groove therein forming part of said second annular space.

Claim 6

For use with a supply of pressurized fluid, a pair of cylinder and shaft members respectively having inner and outer first circumferential surfaces for contact in a shrink fit, at least one of said surfaces formed to define an annular space therebetween, and the shaft including a first duct connecting said annular space with a first inlet, said cylinder and shaft members respectively having inner and outer second circumferential surfaces having diameters corresponding to define a clearance space between them, and also means disposed in said clearance space forming a seal between said members, each of said members having a transitional area between the first and second surfaces thereof defined by a stepped portion, the two transitional areas defining a second annular space therebetween, this second space defined by axially spaced end-surfaces and radially spaced side-surfaces, at least one end-surface of one member being adjacent a corresponding end-surface of the other member, the shaft having a second duct connecting said second annular space with a second inlet, whereby fluid is conductible via said first duct to said first annular chamber for applying radial forces between said shrink fit connection to release said members, and fluid is conductible via said second duct to said second chamber for applying both radial and axial forces between said two members for separating them at least one of said members at said stepped portion having an annular groove therein forming part of said second annular space.

Claim 7

For use with a supply of pressurized fluid, a pair of cylinder and shaft members respectively having inner and outer first circumferential surfaces for contact in a shrink fit, at least one of said surfaces formed to define an annular space therebetween, and the shaft including a first duct connecting said annular space with a first inlet, the diameter of said first surfaces being substantially equal on both sides axially of said first annular space, said cylinder and shaft members respectively having inner and outer second circumferential surfaces having diameters correspOnding to define a clearance space between them, and also means disposed in said clearance space forming a seal between said members, each of said members having a transitional area between the first and second surfaces thereof, the two transitional areas defining a second annular space therebetween, said cylinder further including in its transitional area on the outer circumference thereof an annular recess whereby the cylinder wall thickness in the transitional area is thinner than in said first part, the shaft having a second duct connecting said second annular space with a second inlet, whereby fluid is conductible via said first duct to said first annular chamber for applying radial forces between said shrink fit connection to release said members, and fluid is conductible via said second duct to said second chamber for applying both radial and axial forces between said two members for separating same.

Claim 8

For use with a supply of pressurized fluid, a pair of cylinder and shaft members respectively having inner and outer first circumferential surfaces for contact in a shrink fit, at least one of said surfaces formed to define an annular space therebetween, and the shaft including a first duct connecting said annular space with a first inlet, the diameter of said first surfaces being substantially equal on both sides axially of said first annular space, said cylinder and shaft members respectively having inner and outer second circumferential surfaces having diameters correspOnding to define a clearance space between them, and also means disposed in said clearance space forming a seal between said members, each of said members having a transitional area between the first and second surfaces thereof, the two transitional areas defining a second annular space therebetween, said cylinder further including in its transitional area on the outer circumference thereof an annular recess whereby the cylinder wall thickness in the transitional area is thinner than in said first part, the shaft having a second duct connecting said second annular space with a second inlet, whereby fluid is conductible via said first duct to said first annular chamber for applying radial forces between said shrink fit connection to release said members, and fluid is conductible via said second duct to said second chamber for applying both radial and axial forces between said two members for separating same.