Abstract: A sealed transmission device for controlling a valve including a casing containing a transfer member coupled to a control shaft and to a receiver shaft. A bellows surrounds the receiver shaft and is fixed and sealed at its upper end to the transfer member and is fixed and sealed at its lower end to the casing. The transfer member is operably connected to a tilting member, which tilting member is adapted to protect the bellows from the effects of torsion due to rotation of the control shaft.
Abstract: A sealed rotary transmission device comprises a control shaft and a receiver shaft parallel to and spaced from the control shaft. A bellows surrounds the receiver shaft, and has one end fixed in a sealed way to a casing of the device. The device also includes a transfer member constrained to move parallel to a plane perpendicular to the receiver shaft. The other end of the bellows is fixed to this transfer member in a sealed way. On each of the control and receiver shafts is a respective crank, eccentric to its axis by the same distance. These cranks are coupled to the transfer member and spaced by the same distance as the shafts. This enables circular translation of the transfer member.
Type:
Grant
Filed:
July 1, 1988
Date of Patent:
January 9, 1990
Assignee:
501 Normetex
Inventors:
Daniel Pottier, Remy Leclaire, Paul Vulliez
Abstract: A completely dry fluid-tight reciprocating vacuum pump comprises one or more pumping chambers defined between two rigid parts which face one another in the axial direction. One is reciprocated in a straight line relative to the other. They are connected to one another by at least one axially flexible member of appropriate radial stiffness. Each of these members comprises an outside part fixed to a first of these rigid parts. The side of the first rigid part facing the flexible member is shaped to have a profile in diametral cross-section which is substantially the same as the profile in diametral cross-section that this member tends to assume, by virtue of its stiffness, in the configuration with the aforementioned rigid parts moved towards one another. The pump can be used for pumping corrosive and radioactive gases, such as tritium, for example.
Type:
Grant
Filed:
July 15, 1985
Date of Patent:
January 12, 1988
Assignee:
NORMETEX
Inventors:
Daniel Pottier, Remi Leclaire, Paul Vulliez