초록 ▼

A variable flow restricting device comprises a part (12) having a groove (14) provided in a face (18) thereof and a through-passage (20) communicating with the groove. The device further comprises a covering structure (22) for engaging the face (18) to cover the groove (14) and thereby define a flow

A variable flow restricting device comprises a part (12) having a groove (14) provided in a face (18) thereof and a through-passage (20) communicating with the groove. The device further comprises a covering structure (22) for engaging the face (18) to cover the groove (14) and thereby define a flow path which extends from the through-passage (20) in communication therewith. Covering of the groove is facilitated by a structure (26) for providing relative displacement between the part (12) and the covering structure (22) for causing resilient deformation of the covering structure and/or the part (12) to provide adjustably variable covering of the groove. The flow path extends from the through-passage (20) to an extent which is adjustably variable according to relative displacement of the part (12) and the covering structure.

대표청구항 ▼

[ I claim:] [1.] A variable flow restricting device comprising a part having groove means provided in a face thereof and through-passage means communicating with said groove means, covering means for engaging said face for covering said groove means to define flow path means which extend from said t

[ I claim:] [1.] A variable flow restricting device comprising a part having groove means provided in a face thereof and through-passage means communicating with said groove means, covering means for engaging said face for covering said groove means to define flow path means which extend from said through-passage means in communication therewith, and means for providing relative displacement between said part and said covering means for causing resilient deformation of said covering means and/or said part to provide adjustably variable covering of said groove means such that said flow path means extends from said through-passage means to an extent which is adjustably variable according to said relative displacement, said covering means comprises a resiliently deformable member and a resilient membrane disposed between said deformable member and said face, said deformable member comprises a dome-shaped portion having a generally convex face directed toward said resilient membrane, said membrane includes a generally convex face directed toward said face of said part.