| 摘要 |
The invention is directed to a sealing apparatus for sealing around a medical instrument, the sealing apparatus comprising a housing body; a two-piece cam body disposed inside the housing body; a sealing member disposed inside the cam body and having a channel extending axially of the cam body, the sealing member having at least two protrusions disposed around the channel; a plurality of pins operable to engage with the protrusions of the sealing member for movement relative to the cam body to radially compress the sealing member against and form a seal around the medical instrument; and biasing means for compressing the sealing member. In one aspect of the invention, the biasing means includes a first finger tab fixed to and extending laterally from the housing body, a second finger tab operatively associated with the cam body for movement relative to the housing body, the second finger tab extending laterally from the housing body in apposition to the first finger tab, and a spring being disposed between the first and second finger tabs to normally force the finger tabs apart. In another aspect, the protrusions in the cam body are more than two in number and are disposed around the channel at substantially equally spaced angular intervals. In another aspect, at least one of a radius, width, length, and angle of engagement of the pins may be varied or changed to exert different pressure against the surface of the protrusions. In another aspect, a process of assembling the sealing apparatus of the invention is disclosed, the process comprising the steps of placing the pins onto or against the protrusions of the sealing member; placing a first cam body half and a second cam body half over the sealing member and joining the two cam body halves together forming the 2-piece cam body; placing the housing body over the cam body; and placing the biasing means over the cam body inside the housing body.
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