Vacuum chuck rotary seal
First Claim
1. A rotary device comprising a motor having an axially bored drive shaft, a vacuum chuck mounted on one end of said shaft;
- a first seal member mounted on the other end of said shaft opposite said chuck end;
a floating second seal member of restricted rotation;
means mounting said second seal member coaxial with said first seal member and longitudinally movable relative thereto and for restricting its rotation;
one of said seal members having formed therein an axial socket with a first conical face terminating in a base at its inner end and having a bore communicating with said socket and the other seal member having an axial projection with a second conical face nesting in said socket and superimposed on and slidably engaging said first conical face and provided with an axially extending bore, the apex of said projection being axially spaced from said base of said socket;
means connecting one of said bores to a vacuum source and means for axially resiliently biasing said seal members toward each other to urge said first and second faces into mutual engagement.
2 Assignments
0 Petitions
Accused Products
Abstract
A vacuum chuck apparatus includes a vacuum chuck mounted on one end of a hollow shaft whose other end is connected through a rotary seal to a vacuum source. The seal includes a first member having a cap portion cemented to the shaft end and an axially bored frustoconical projection on its end wall and a second member having a frustoconical socket complementing the projection which partially nests in the socket. The second member has a radial pin loosely engaging a longitudinal slot in a stationary bracket to restrict its rotation and permit its axial movement. A spring loaded pressure plate bears on the outer end face of the seal second member.
34 Citations
10 Claims
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1. A rotary device comprising a motor having an axially bored drive shaft, a vacuum chuck mounted on one end of said shaft;
- a first seal member mounted on the other end of said shaft opposite said chuck end;
a floating second seal member of restricted rotation;
means mounting said second seal member coaxial with said first seal member and longitudinally movable relative thereto and for restricting its rotation;
one of said seal members having formed therein an axial socket with a first conical face terminating in a base at its inner end and having a bore communicating with said socket and the other seal member having an axial projection with a second conical face nesting in said socket and superimposed on and slidably engaging said first conical face and provided with an axially extending bore, the apex of said projection being axially spaced from said base of said socket;
means connecting one of said bores to a vacuum source and means for axially resiliently biasing said seal members toward each other to urge said first and second faces into mutual engagement. - View Dependent Claims (2, 3, 4)
- a first seal member mounted on the other end of said shaft opposite said chuck end;
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5. A rotary vacuum chuck apparatus comprising a motor housing;
- a longitudinally axially bored hollow motor drive shaft extending through and projecting beyond said housing;
a vacuum chuck member mounted on one end of said shaft;
a first vacuum seal member mounted on and rotatable with the other end of said shaft proximate a first end face of said housing and said first vacuum seal member including a conical projection coaxial with said shaft and having an axial bore;
a floating second seal member of restricted rotation and having a conically shaped axial socket spaced proximate said first seal member and an axial bore communicating with said socket, said first seal member conical projection nesting in said socket and having an apex spaced from the base of said socket;
spring-loaded means axially biasing said second seal member toward said first seal member;
means limiting the rotation of said second seal member; and
means providing communication between said socket and a vacuum source. - View Dependent Claims (6, 7, 8, 9, 10)
- a longitudinally axially bored hollow motor drive shaft extending through and projecting beyond said housing;
Specification