Assignee
SPIRAC ENGINEERING AB
SE·14 granted patents·343 citations·filing 1986–1998
Top patents by PatentIndex Score
14 records- 0197US4779528AFloating shaftless helix screw pressSPIRAC ENGINEERING AB·Filed 1986·Granted Oct 25, 1988·74 cites·19 claims
- 0285US5092453AHelical conveyorSPIRAC ENGINEERING AB·Filed 1990·Granted Mar 3, 1992·44 cites·12 claims
- 0379US5000307ATransportation deviceSPIRAC ENGINEERING AB·Filed 1989·Granted Mar 19, 1991·30 cites·22 claims
- 0478US5562029AConveying and compacting apparatus having a shaftless spiral in a casing with drainage openingsSPIRAC ENGINEERING AB·Filed 1994·Granted Oct 8, 1996·22 cites·18 claims
- 0578US5368153ATransportation device having a driven shaftless spiral freely fitted in a casing and resting thereonSPIRAC ENGINEERING AB·Filed 1992·Granted Nov 29, 1994·33 cites·15 claims
- 0675US5337658AConveying and compacting apparatus having a shaftless spiral in a casing with drainage openingsSPIRAC ENGINEERING AB·Filed 1993·Granted Aug 16, 1994·20 cites·20 claims
- 0769US6357577B1Conveyor arrangements with multiple shaftless screwsSPIRAC ENGINEERING AB·Filed 1998·Granted Mar 19, 2002·25 cites·10 claims
- 0864US4961864ASeparating deviceSPIRAC ENGINEERING AB·Filed 1989·Granted Oct 9, 1990·24 cites·21 claims
- 0961US5676827AApparatus for discharge of sediment from a tankSPIRAC ENGINEERING AB·Filed 1994·Granted Oct 14, 1997·20 cites·15 claims
- 1053US5910243ADisplacement deviceSPIRAC ENGINEERING AB·Filed 1997·Granted Jun 8, 1999·17 cites·19 claims
- 1150US5421251AApparatus for compacting materialSPIRAC ENGINEERING AB·Filed 1994·Granted Jun 6, 1995·9 cites·35 claims
- 1246US6187180B1Apparatus for screeningSPIRAC ENGINEERING AB·Filed 1997·Granted Feb 13, 2001·17 cites·10 claims
- 1339US4922768ADriving deviceSPIRAC ENGINEERING AB·Filed 1989·Granted May 8, 1990·6 cites·11 claims
- 1430US4984477ADriving deviceSPIRAC ENGINEERING AB·Filed 1989·Granted Jan 15, 1991·2 cites·15 claims
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