Patent ID: 7179637

Claim:
An article comprising: an enclosure having a first aperture and a second aperture; a tissue support have a third aperture and a fourth aperture, wherein said tissue support is disposed within and axially aligned with said enclosure along an axis coinciding with said first aperture, second aperture, third aperture, and said fourth aperture; a first feed fitting, wherein said first feed fitting is received by said first aperture and said third aperture; a first spring-biasing element, wherein said first spring-biasing element mechanically couples to said first feed fitting; a second feed fitting, wherein said second feed fitting is received by said second aperture and said fourth aperture; and a second spring-biasing element, wherein said second spring-biasing element mechanically couples to said second feed fitting; wherein: said first spring-biasing element, said first feed fitting, said second feed fitting and said second spring-biasing element are aligned with said axis.