| 摘要 |
A bed apparatus is pivotal from a horizontal position to a generally upright position and has a base frame with a mattress supporting platform hinged thereto for pivoting between a generally horizontal position and a generally upright position. A counterweight container has a generally flat side intersected along two edges by a generally arcuate side. The container has a sealable opening adjacent one intersecting edge of the intersecting arcuate and flat sides. The sealable opening is positioned above the fluid material in the container in both the horizontal and upright positions to thereby prevent leakage from the sealable opening and to allow filling the container from either position.
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