Pipe joints or couplings – Having plural independent paths – Allowing relative motion of pipes
Reexamination Certificate
2008-09-11
2010-11-02
Dunwoody, Aaron (Department: 3679)
Pipe joints or couplings
Having plural independent paths
Allowing relative motion of pipes
C285S273000
Reexamination Certificate
active
07823929
ABSTRACT:
The present invention relates to a radial rotary transmission leadthrough with a rotating shaft which has at least two substantially axially running channels (4, 4′) which have radial transition openings (5) open to the periphery of the shaft, and with at least one guide bush (2, 2a) tightly surrounding the shaft (1) in the area of the transition openings (5) which has at least one radial feed bore each (6) for every one of the channels (4, 4′) to be connected via the bush (2, 2a), wherein the different channels (4, 4′) have their radial transition openings (5) at different axial positions of the shaft (1). In order to create a radial rotary transmission leadthrough of the type named at the outset which has a small axial length and by which, despite small friction, the leakage rates can be reduced and accordingly the risk of the shaft jamming in the bush can be minimized, it is proposed according to the invention that the rotary transmission leadthrough has at least two bushes (2, 2a) which encompass the shaft (1) for the connection with different channels (4, 4′) at axially different positions, and which are housed independently of each other in a common bush holder (10), wherein at least one of the bushes has several radial feed bores (6, 6a, 6′).
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patent: 4422676 (1983-12-01), Sitabkhan
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patent: 7083200 (2006-08-01), Falconer
patent: 19621020 (1997-11-01), None
patent: 2171765 (1986-09-01), None
Hoff Dennis
Ott Stephan
Dunwoody Aaron
GAT Gesellschaft fur Antriebstechnik mbH
Paul & Paul
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