Sanitary seal design and vent using such seal

摘要

A seal, a vent for a filter housing and a system for using them.The seal is designed a first outer seal having a closed outer periphery that divides and isolates a first inner area from the outside environment and a second inner seal formed along a portion of the inner surface of the first outer seal and forming a second inner area within the first inner area and which is isolated from both the first inner area and the outside environment.The seal is incorporated into a vent for a filter housing having opening is contained within a vent area and the opening is offset from the center of the vent area. The opening establishes a fluid pathway from the interior to the exterior of the filter device. The inner seal surrounds the vent opening. The outer seal also surrounds the vent opening at one of its ends and surrounds the entire periphery of the vent area so as to isolate the vent area from the area outside of the vent area. A vent cap is secured at its outer periphery to the outer periphery of the vent area. The cap has an exhaust port which when in alignment with the vent allows fluid to flow out of the housing interior. The exhaust port is offset from the center of the cap and is designed to align with the offset opening of the vent. The cap is either moved in a linear or rotational motion and the vent opening and the cap opening are always contained within the area defined by the outer seal so as to form a sanitary seal.Also disclosed in a sanitary recovery system utilizing the seal and vent of the present invention.