Ti Corporate Services Limited

Other

Frank S Krasnicki

Murray R Mason

Gerrald A Klages

Apparatus for fluid filling and pressurizing a tube having a high pressure-low flow fluid circuit in the form of a shaft having a longitudinal bore communicating with a high pressure fluid source, a tube seal device adjacent the forward end of the shaft for sealing the tube when the shaft is engaged with the tube and high pressure fluid flows into the tube, and a device for reciprocating the shaft to advance and retract the shaft toward and away from the tube. A high flow low pressure circuit has a shroud for housing the forward end of the shaft when retracted and a rearward opening slidably and sealably engaging the shaft rearward of the tube seal device. The interior of the shroud communicates with a high flow-low pressure fluid source for sealing an external surface adjacent an end of the tube. In operation the shroud is advanced to seal the external surface; the tube is filled with low pressure fluid at a high flow rate, the shaft is advanced, the tube seal engaged, the tube is pressurized, and the process is reversed to release the tube.

Seal head for tube expansion apparatus

An apparatus is provided for filling a tube with fluid and for pressurizing the tube, in order to expand and form it within a die for example. The apparatus provides a high flow-low pressure fluid circuit for quickly filling and draining the tube, together with a separate high pressure-low flow fluid circuit for pressurizing and depressurizing the tube. The high pressure circuit of the apparatus comprises a shaft having a longitudinal bore communicating with a high pressure fluid source and control means; tube sealing means adjacent the forward end of the shaft for sealing the tube when the shaft is engaged with the tube and high pressure fluid flows into the tube; and shaft reciprocating means for advancing and retracting the shaft. The high flow circuit of the apparatus comprises: a forwardly open shroud, housing the forward end of the shaft when retracted and having a rearward opening slidably and sealably engaging the forward end of the shaft rearward of the tube sealing means, the interior of the shroud communicating with a high flow-low pressure fluid source and control-means; external seal means about the forward opening of the shroud for sealing an external surface adjacent an end of the tube; and shroud reciprocating means for advancing and retracting the shroud. In operation therefore: the shroud is advanced to seal the external surface; the tube is filled with low pressure fluid; the shaft is advanced and the tube sealing means engaged; the tube is pressurized; and the process is reversed to release the tube.

An apparatus is provided for filling a tube with fluid and for pressurizing the tube, in order to expand and form it within a die for example. The apparatus provides a high flow-low pressure fluid circuit for quickly filling and draining the tube, together with a separate high pressure-low flow fluid circuit for pressurizing and depressurizing the tube. The high pressure circuit of the apparatus includes a shaft having a longitudinal bore, communicating with a high pressure fluid source and controls; tube sealing device adjacent the forward end of the shaft for sealing the tube when the shaft is engaged with the tube and high pressure fluid flows into the tube; and a shaft reciprocating mechanism for advancing and retracting the shaft. The high flow circuit of the apparatus includes: a forwardly open shroud, housing the forward end of the shaft when retracted and having a rearward opening slidably and sealably engaging the forward end of the shaft rearward of the tube sealing device, the interior of the shroud communicating with a high flow-low pressure fluid source and controls; an external seal device about the forward opening of the shroud for sealing an external surface adjacent an end of the tube; and a shroud reciprocating mechanism for advancing and retracting the shroud. In operation therefore: the shroud is advanced to seal the external surface; the tube is filled with low pressure fluid; the shaft is advanced and the tube sealing device engaged; the tube is pressurized; and the process is reversed to release the tube.

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Kitchener, Canada

Frank S Krasnicki