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A ventricular apex connector for quick connection and disconnection of an inflow tube of a ventricular assist device, comprising a sewing ring, a cylindrical ring, gripping pins, a spring ring and a sealing O-ring is provided. The cylindrical ring defines two openings, diametrically opposed to each

A ventricular apex connector for quick connection and disconnection of an inflow tube of a ventricular assist device, comprising a sewing ring, a cylindrical ring, gripping pins, a spring ring and a sealing O-ring is provided. The cylindrical ring defines two openings, diametrically opposed to each other, in its walls. Gripping pins, comprising rods with gripping pads, are placed in the openings in the cylindrical ring so that the gripping pads are at rest within the inner circumference of the cylindrical ring. The spring ring is placed around the cylindrical ring and the rods of the gripping pads, which extend out of the outer wall of the cylindrical ring, are welded to the spring ring. The gripping pins are thus biased towards each other by the force of the spring ring. When the spring ring is squeezed, at points away from the gripping pin connection points, the deformation of the spring ring causes the gripping pads to be pulled out towards the inner wall of the cylindrical ring. An inflow tube of a heart pump may then be inserted into the ventricular apex connector, and upon the release of the spring ring, the inflow tube is sealedly held within the ventricle of the heart. In an embodiment an adapter sleeve may be attached to the inflow tube. In a further embodiment, the inflow tube may include an inner sleeve that is slidably and rotatably mounted therein. The inflow tube may have a bend at an end.

대표청구항 ▼

A ventricular apex connector for quick connection and disconnection of an inflow tube of a ventricular assist device, comprising a sewing ring, a cylindrical ring, gripping pins, a spring ring and a sealing O-ring is provided. The cylindrical ring defines two openings, diametrically opposed to each

A ventricular apex connector for quick connection and disconnection of an inflow tube of a ventricular assist device, comprising a sewing ring, a cylindrical ring, gripping pins, a spring ring and a sealing O-ring is provided. The cylindrical ring defines two openings, diametrically opposed to each other, in its walls. Gripping pins, comprising rods with gripping pads, are placed in the openings in the cylindrical ring so that the gripping pads are at rest within the inner circumference of the cylindrical ring. The spring ring is placed around the cylindrical ring and the rods of the gripping pads, which extend out of the outer wall of the cylindrical ring, are welded to the spring ring. The gripping pins are thus biased towards each other by the force of the spring ring. When the spring ring is squeezed, at points away from the gripping pin connection points, the deformation of the spring ring causes the gripping pads to be pulled out towards the inner wall of the cylindrical ring. An inflow tube of a heart pump may then be inserted into the ventricular apex connector, and upon the release of the spring ring, the inflow tube is sealedly held within the ventricle of the heart. In an embodiment an adapter sleeve may be attached to the inflow tube. In a further embodiment, the inflow tube may include an inner sleeve that is slidably and rotatably mounted therein. The inflow tube may have a bend at an end. ement while said locking means is engaged. 8. The mower of claim 1 wherein said bearing surface is a substantially cylindrical surface of a roller, said roller rotatably attached to said frame.9. The mower of claim 8 wherein said roller has a configuration similar to at least one of said primary ground contacting surfaces.10. The mower of claim 9 wherein said at least two primary ground contacting surfaces include a front cylinder rotatably attached to said frame in front of said cutting implement and a second primary ground contacting surface behind said cutting implement; and wherein said roller providing said bearing surface is adapted to be removably attached in front of said front cylinder when said bearing surface is coupled to said mower. 11. The mower of claim 10 wherein said roller is similar to said front cylinder.12. The mower of claim 11 wherein said bearing surface is located upon a riser attachment, said riser attachment removably attachable to said frame of said mower; and wherein said riser attachment includes a bracket secured to said frame, said roller rotatably coupled to an interface, said interface adapted to be toollessly removably coupled to said bracket. 13. The mower of claim 12 wherein said interface includes an arm extending linearly and said bracket includes a substantially linear cavity sized to receive said arm therein.14. The mower of claim 13 wherein a height adjuster is located between said bearing surface and said frame, said height adjuster adapted to change a distance at which said bearing surface extends below said mower support plane, such that said second cutting height can be adjusted; wherein said height adjuster includes a threaded bolt rotatable within a threaded hole with the height of said bearing surface below said mower support plane adjusted when said bolt is rotated; and means to lock said bolt rotationally so that said bolt is prevented from further movement while said locking means is engaged. 15. A riser attachment for a mower to change a grass cutting height at which the mower cuts, the mower having at least two ground contacting surfaces without said riser attachment, the riser attachment comprising in combination: a bearing surface adapted to support at least a portion of the mower upon the ground through said bearing surface when said bearing surface is coupled to the mower; and a fastener adapted to removably fasten said bearing surface to the mower with said bearing surface lower than a plane in which the ground contacting surfaces are located, such that at least a portion of the mower is elevated and the grass cutting height is changed. 16. The riser attachment of claim 15 wherein said bearing surface is a substantially cylindrical surface of a roller, said roller adapted to be rotatably attached to the mower.17. The riser attachment of claim 16 wherein said roller is similar to at least one of the ground contacting surfaces of the mower to which said roller is adapted to be rotatably attached.18. The riser attachment of claim 15 wherein said fastener includes a height adjuster adapted to set a height at which said bearing surface extends below said plane in which the ground contacting surfaces of the mower are located.19. The riser attachment of claim 18 wherein said height adjuster includes a threaded bolt rotatable within a threaded hole with the height of said bearing surface below said mower support plane adjusted when said bolt is rotated.20. The riser attachment of claim 19 wherein said height adjuster includes a means to lock said bolt rotationally so that said bolt is prevented from further movement while said locking means is engaged.21. The riser attachment of claim 15 wherein said fastener includes a pair of interfaces, said bearing surface having an elongate form between ends, each of said pair of interfaces connected to one of said ends of said bearing surface; and said fastener including a pair of brackets adapted to be coupled to the mo wer, the brackets each including means to releasably hold one of said interfaces adjacent one of said brackets. 22. The riser attachment of claim 21 wherein each said bracket includes an elongate cavity therein and each said interface includes an elongate arm therein sized to slide into and out of one of said cavities of one of said brackets.23. The riser attachment of claim 22 wherein at least one of said cavities includes a side hole therein with female threads adjacent thereto, said fastener including a threaded post extending through said side hole with a lever attached to said threaded post adapted to manually rotate said threaded post into said side hole, such that said threaded post can pinch said arm within said cavity to hold said bearing surface removably to said bracket coupled to the mower.24. The riser attachment of claim 23 wherein said height adjuster includes a threaded bolt rotatable within a threaded hole with the height of said bearing surface below said mower support plane adjusted when said bolt is rotated; and means to lock said bolt rotationally so that said bolt is prevented from further movement while said locking means is engaged. 25. The riser attachment of claim 21 wherein said pair of brackets each include mounting holes adapted to be aligned with bores on opposite sides of the mower, said fastener including mounting bolts adapted to pass through said mounting holes in said brackets and thread into the holes in the mower to removably attach the brackets to opposite sides of the mower for removable attachment of the bearing surface thereto.26. The riser attachment of claim 21 wherein said interfaces are each rotatably connected to said bearing surface, said bearing surface configured as a substantially cylindrical surface of a roller.27. The riser attachment of claim 26 wherein an axle is rigidly connected to each said interface with said roller rotatably supported upon said axle.28. The riser attachment of claim 27 wherein each said interface includes a collar with a non-circular cross-section matching a non-circular contour of tips of said axle, said collar including a set screw therein adapted to hold said axle relative to said collar without rotation there between, said axle including one groove adjacent each said tip with a locking ring located within said groove, said locking rings adapted to prevent said roller from translating laterally along said axle.29. A system for adjusting a mower cutting height for a mower having a cutting implement and at least two primary ground contacting surfaces defining a mower support plane, with the cutting implement located above the mower support plane by a distance substantially equal to a first cutting height, the height adjustment system comprising in combination: a bearing surface adapted to support at least a portion of the mower above ground, said bearing surface located below said mower support plane when said bearing surface is coupled to the mower; and means for removably coupling said bearing surface to the mower, such that the cutting implement is at a second cutting height when said bearing surface is coupled to the mower, the second cutting height higher than the first cutting height when said bearing surface is not coupled to the mower. 30. The system of claim 29 wherein said bearing surface is an elongate substantially cylindrical roller with a pair of rotational supports located at ends of said roller, said means for removably coupling said bearing surface to the mower located between each of said rotational supports and the mower.31. The system of claim 30 wherein said means for removably coupling said bearing surface to the mower includes means for removably fastening said rotational supports to the mower.32. The system of claim 31 wherein said means for removably coupling said bearing surface to the mower includes a pair of brackets removably bolted to the mower in a non-rotational fashion and with said rotational supports removab