US 4,305,596 AGranted

Joint seal on the rotor drive of an eccentric screw machine

AssigneeNetzsch-Mohnopumpen GmbH

InventorEugen Unterstrasser

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Abstract

Improved joint seal for the rotor drive of an eccentric screw machine comprises a sealing cuff of elastomeric or thermoplastic material with a radially exterior rim bead connected to the outer joint sleeve by means of an exterior supporting ring, and a radially interior rim bead with a generally axis-parallel ring apron radially outward thereof. An interior supporting ring with an axis-parallel annular limb connects the radially interior rim bead of the cuff to a coupling rod of the joint with the annular limb of the interior supporting ring clasped between the radially interior rim bead and the ring apron disposed outwardly thereof on the sealing cuff. The radially exterior rim bead may be connected to the joint sleeve by means of an exterior suporting ring similar to the interior supporting ring.

Claims10

Dependent claims

A joint seal on a rotor drive of an eccentric screw machine having a joint sleeve and a coupling rod connected together such as to be movable at an angle with respect to one another and a sealing cuff made of elastomeric or thermoplastic material, said sealing cuff having two radially displaced ends,

a radially interior rim bead being formed on one of said ends, a radially exterior rim bead being formed on the other of said ends,
said radially interior rim bead being connected to said coupling rod by means of an interior supporting ring,
said radially exterior rim bead being connected to said joint sleeve by means of an exterior supporting ring,
said radially interior rim bead extending generally axis-parallel with respect to said coupling rod, the sealing cuff additionally having a likewise generally axis-parallel ring apron radially displaced outwardly from its radially interior rim bead,
said interior supporting ring having a likewise generally axis-parallel annular limb formed thereon, said annular limb of the interior supporting ring being clasped between said radially interior rim bead and said ring apron of the sealing cuff.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 06/067,407Filed 17 Aug 1979
Priority: DE 283704924 Aug 1978
Granted: 15 Dec 1981
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

F01C 19/125
For other than working fluid: shaft sealings specially adapted for rotary or oscillating-piston machines or engines
F16D 3/185
The coupling parts having slidably-interengaging teeth: radial teeth connecting concentric inner and outer coupling parts
F16D 3/845
Enclosed covers: allowing relative movement of joint parts due to the flexing of the cover
F01C
Rotary-piston or oscillating-piston machines or engines