Home | Links | Contact Us | More About Intellectual Property | Bookmark

Search patents:

Home

Heart Surgery

Centrifuge-with-clutch-mechanism-for-synchronous-blade-and-bowl-rotation

Flextensional output actuators for surgically implantable hearing aids

This invention relates to devices and methods relating to implantable hearing aids for placement ...

Self-expanding defect closure device and method of making and using

The present invention provides a self-expanding defect closure device that overcomes the many ...

Method and apparatus for treating pain with therapeutic magnets

What is claimed is: 1. A method of arranging a plurality of therapeutic electromagnetic treatment ...

Minimally invasive direct cardiac massage device and method

The cardiac pumping device and method presented below allows for direct cardiac massage in a ...

Heater door mechanism for infant warming apparatus

Accordingly, the present invention relates to an infant care apparatus that combines the functions ...

Prosthetic heart valve with increased valve lumen

A heart valve prosthesis for implantation in the heart of a patient includes a valve housing or ...

Method of making hollow elastomeric bodies

In accordance with the invention, an annular hollow body having an integral, sharp-cornered flange ...

Artificial heart valve made by vacuum forming technique

OF THE PREFERRED EMBODIMENTS Reference is now made to the accompanying drawings wherein like parts ...

Method of making a blood pumping membrance for artificial ventricles

OF THE INVENTION FIG. 1 shows an artificial ventricle 10 which may be used as a ventricle assist ...

Device and method for an IAB assist with multiple balloons

The present invention involves the use of two or more intra-aortic balloons which may be of ...

Centrifuge with clutch mechanism for synchronous blade and bowl rotation

Details

Inventors: Beattey, Jeffery N.;
Assignee:
Primary Examiner: Cooley; Charles E.
Assistant Examiner:
Attorney, Agent or Firm: Martin, Esq; C. Richard

An improved centrifuge apparatus comprising a spindle with an affixed bowl and a drive shaft passing through the spindle with a plurality of scraper blades affixed which rotate within the bowl. The spindle is driven by a pulley with a belt attached to a motor. The centrifuge has a clutch mechanism which provides a positive lock to insure synchronous blade and bowl rotation during processing. The clutch mechanism comprises a shifting coupling attached to the drive shaft with a bottom set of teeth and a top set of teeth. The bottom set of teeth interlockingly engage a matching set of teeth located on either the pulley or the top of the spindle. The top set of teeth interlockingly engage a matching set of teeth that are either immovably attached to a plate or attached to a sprocket which is rotatably attached to the plate. The scraper blades have recesses in their front face to allow a variable cutting edge geometry and the mixing and matching of cutting edge geometry while permitting the use of the same base blade. The centrifuge has a tangential outlet and an annular housing to minimize spray and misting in the exiting centrifuged liquid.

DETAILED DESCRIPTION In one aspect of the invention the centrifuges comprises a spindle centered on a longitudinal axis with a top portion, a bottom portion, and a hollow interior extending along the longitudinal axis, a bowl attached to the bottom portion of the spindle and a drive shaft passing through the hollow interior with a plurality of scraper blades attached to the drive shaft.
The centrifuge has a clutch mechanism comprising a shifting coupling attached to the blade drive shaft via a key locked in a rotary direction.
The shifting coupling has a first set of teeth that interlockingly engage a second set of teeth.
The second set of teeth are attached to the top of the spindle in one embodiment.
In another embodiment the second set of teeth are attached to a pulley attached to the top portion of the spindle.
The shifting coupling may be shifted upward and downward along the longitudinal axis between two positions.
In the first position the first and second set of teeth are lockingly engaged so that the spindle and the scraper drive shaft rotate together.
In the second position the first and second sets of teeth are disengaged.
In another aspect of this invention the centrifuge comprises a spindle configured to rotate about an axis.
A bowl is attached to and rotates with the spindle.
A drive shaft is received within a passageway of the spindle and rotates about the same axis.
A scraper blade is attached to and rotates with the drive shaft.
A mechanism is provided to selectively couple the drive shaft and spindle together to allow both to be driven by the same motor.
In another aspect of this invention the centrifuge scraping apparatus comprises blades with recesses on its front face adjacent the end of the blade next to the inner surface of the bowl.
Inserts are placed in the recesses to give the scraper blade different cutting surfaces for contacting solids accumulated on the interior wall of the bowl.
In another aspect of the invention the centrifuge scraping kit comprises a rotatable scraper frame with a number of opposing ends

Related patents

	Haemofiltration with filtrate flow control by adjustable venting OF A PREFERRED EXAMPLE EMBODIMENT AND OF THE BEST MODE OF THE INVENTION A double tube pump 1 is provided for simultaneously conveying blood and filtrate. The upper part ...
	Infant thermal support device It has therefore been an objective of the present invention to improve upon prior art incubators by providing an incubator which will maintain the appropriate ...
	Surface-modifying copolymers having cell adhesion properties What is claimed is: 1. A hemocompatible surface-modifying copolymer additive for modifying poly(urethane), poly(urethane urea) or polystyrene base polymers, said ...
	System for administering a combination of therapies to a body lumen The present invention is aimed at using an implantable medical device to effect a desired treatment, which is often, but not necessarily, the prevention of restenosis. S...
	Piezoelectric pumps The present invention is directed to an electro-motional device, specifically piezoelectric pumps. More specifically, the present invention is directed to various ...
	Magnetically driven axial-flow pump According to the present invention, there is provided a magnetically driven axial-flow pump comprising (i) an electromagnet unit arranged about the periphery of a pipe, (...
	Electric motor driven blower assembly with integral motor cooling duct The subject invention provides an alternative structure for providing an integral motor cooling air passage, with better sealing and higher tolerance at the joint. In ...
	Tongue-airway appliance The present invention provides an intra-oral appliance in the form of a tongue-airway functional appliance which restores/encourages training of the tongue, which ...
	Method and apparatus for preventing air embolisms One aspect of the present invention involves providing a method of preventing air embolisms. The method comprises the steps of: (a) providing a fluid source in ...
	Isolation chamber The present invention provides an isolation chamber that provides containment for a contaminated patient. Advantageously, embodiments of the present invention are usable ...

0.014
Archive: All patents - Links Copyright (c)2006 Eipa-patents.org - All rights reserved