초록 ▼

A fluid flow controlling butterfly valve assembly is disclosed which comprises a valve body defining a through passage for fluid, a butterfly valving member supported within the body, a shaft extending transversely through the passage and drivingly connected to the valving member, and a shaft suppor

A fluid flow controlling butterfly valve assembly is disclosed which comprises a valve body defining a through passage for fluid, a butterfly valving member supported within the body, a shaft extending transversely through the passage and drivingly connected to the valving member, and a shaft supporting structure rotatably supporting the shaft in the body while sealing against leakage from the valve. In a preferred embodiment the shaft supporting structure includes a band extending about the body and defining recesses aligned with shaft portions emerging from the body. Resilient flexible elements are disposed within the recesses and compressively engage the shaft and body to provide both bearings and seals.

대표청구항 ▼

A fluid flow controlling valve assembly comprising: (a) a tubular valve body defining a through passage for fluid flow; (b) a butterfly valving member supported within said valve body; (c) a shaft extending transversely of said passage, said shaft drivingly connected to said valving member for rotat

A fluid flow controlling valve assembly comprising: (a) a tubular valve body defining a through passage for fluid flow; (b) a butterfly valving member supported within said valve body; (c) a shaft extending transversely of said passage, said shaft drivingly connected to said valving member for rotating said valving member within said passage, said shaft defining spaced sections extending through openings in said valve body; and, (d) shaft supporting means supporting said shaft for rotation within said openings and sealing against the escape of fluid from said valve assembly through said openings, said shaft supporting means comprising: (i) band structure disposed about said body and defining first and second recesses aligned respectively with said openings, said recesses each defining a recess wall portion spaced outwardly from the valve body, said shaft portions extending into said respective recesses; (ii) a resilient flexible element disposed within each of said recesses, each said resilient flexible element extending about an adjacent respective shaft section; and, (iii) connecting means for securing said band structure about said valve body with said band structure compressively engaging each of said resilient flexible elements between said body and a respective recess wall portion, said elements urged into bearing engagement with said shaft sections.