High vacuum seal
First Claim
Patent Images
1. In a vacuum-tight closure assembly including means defining a valve seat;
- a spreadable valve plate movable into a closed position for assuming a spreaded state in which it sealingly engages the valve seat; and
guide means for a centered guiding of the valve plate during its motion into the closed position;
the improvement wherein said guide means comprises(a) a plurality of lugs affixed to said means defining said valve seat;
each said lug having a guide face being situated in the vicinity of said valve seat; and
(b) a carrier affixed to and movable with said valve plate and having a periphery comprising counterguide faces;
said guide faces of said lugs being oriented towards said counterguide faces of said carrier;
said guide face cooperating with said counterguide faces during said motion of said valve plate.
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Abstract
A vacuum-tight closure assembly includes a valve seat; a spreadable valve plate movable into a closed position for assuming a spreaded state in which it sealingly engages the valve seat; and a guide arrangement for a centered guiding of the valve plate during its motion into the closed position. The guide arrangement includes guide faces located in the vicinity of and stationarily with respect to the valve seat and counterguide faces located on and movable with the valve plate. The guide faces cooperate with the counterguide faces during the motion of the valve plate towards the closed position.
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Citations
17 Claims
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1. In a vacuum-tight closure assembly including means defining a valve seat;
- a spreadable valve plate movable into a closed position for assuming a spreaded state in which it sealingly engages the valve seat; and
guide means for a centered guiding of the valve plate during its motion into the closed position;
the improvement wherein said guide means comprises(a) a plurality of lugs affixed to said means defining said valve seat;
each said lug having a guide face being situated in the vicinity of said valve seat; and(b) a carrier affixed to and movable with said valve plate and having a periphery comprising counterguide faces;
said guide faces of said lugs being oriented towards said counterguide faces of said carrier;
said guide face cooperating with said counterguide faces during said motion of said valve plate. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 16, 17)
- a spreadable valve plate movable into a closed position for assuming a spreaded state in which it sealingly engages the valve seat; and
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2. In a vacuum-tight closure assembly including means defining a valve seat having a central axis;
- a spreadable valve plate movable into a closed position for assuming a spreaded state in which it sealingly engages the valve seat; and
guide means for a centered guiding of the valve plate during its motion into the closed position;
the improvement wherein said guide means comprises(a) means defining guide faces arranged in the vicinity of and stationarily with respect to said valve seat; and (b) a carrier affixed to and movable with said valve plate;
said carrier having a circular periphery being concentric with said axis and comprising counterguide faces;
said guide faces cooperating with said counterguide faces during said motion of said valve plate. - View Dependent Claims (11, 12, 13, 14)
- a spreadable valve plate movable into a closed position for assuming a spreaded state in which it sealingly engages the valve seat; and
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3. In a vacuum-tight closure assembly including means defining a valve seat having a central axis and a cylindrical surface;
- a spreadable valve plate movable into a closed position for assuming a spreaded state in which it sealingly engages the valve seat; and
guide means for a centered guiding of the valve plate during its motion into the closed position;
the improvement wherein said guide means comprises(a) a plurality of lugs affixed to said means defining said valve seat;
each said lug having a guide face oriented towards said central axis and being concentric therewith;
the guide faces being situated in the vicinity of said valve seat and being spaced therefrom in a direction parallel to said central axis;
said guide faces and said valve seat defining adjacent cylindrical surfaces which are coaxial with said central axis and having identical diameters; and(b) means defining counterguide faces attached to and movable with said valve plate;
said guide faces cooperating with said counterguide faces during said motion of said valve plate. - View Dependent Claims (15)
- a spreadable valve plate movable into a closed position for assuming a spreaded state in which it sealingly engages the valve seat; and
Specification