Cam expansion ring assembly

An expansion ring assembly for use in radially expanding a gasket into sealing relationship with an opening in a wall, said expansion ring assembly comprising:

• a ring defining a longitudinal axis coincident with a center of said ring, said ring having first and second adjacent end portions;
• a first cam member rotatably coupled to said first ring end portion about a rotation axis, said rotation axis is perpendicular to said longitudinal axis, said first cam member having a cam surface engageable with at least a portion of said second ring end portion upon rotation of said first cam member to drive said first and second ring end portions apart from one another and thereby radially expand said ring, wherein said first cam member is rotatably coupled to said first ring end portion via a one-way clutch mechanism which allows rotation of said first cam member in a first direction and prevents rotation of said first cam member in a second direction opposite said first direction.

An expansion ring assembly for use in radially expanding a gasket into sealing relationship with an opening in a wall, said expansion ring assembly comprising:

• a ring defining a longitudinal axis coincident with a center of said ring, said ring having first and second adjacent end portions;
• a first cam member rotatably coupled to said first ring end portion about a rotation axis, said rotation axis is perpendicular to said longitudinal axis, said first cam member having a cam surface engageable with at least a portion of said second ring end portion upon rotation of said first cam member to drive said first and second ring end portions apart from one another and thereby radially expand said ring, wherein said first cam member further includes a plurality of ratchet teeth, and said first ring end portion includes a ratchet pawl sequentially engageable with said ratchet teeth upon rotation of said first cam member in a first direction to thereby prevent rotation of said first cam member in a second direction opposite said first direction.

An expansion ring assembly for use in radially expanding a gasket into sealing relationship with an opening in a wall, said expansion ring assembly, comprising:

• a ring defining a longitudinal axis coincident with a center of said ring, said ring having first and second adjacent end portions;
• first and second cam members rotatably coupled to said first and second end portions each about a respective rotation axis, each said rotation axis is perpendicular to said longitudinal axis, respectively, said first and second cam members each having a cam surface engageable with the other cam member upon rotation thereof to drive said first and second ring end portions apart from one another and thereby radially expand said ring, wherein said first and second cam members are rotatably coupled to said first and second ring end portions, respectively, via one-way clutch mechanisms which allow rotation of each of said first and second cam members in a first direction and prevent rotation of said first and second cam members in a second direction opposite said first direction.

An expansion ring assembly for use in radially expanding a gasket into sealing relationship with an opening in a wall, said expansion ring assembly, comprising:

• a ring defining a longitudinal axis coincident with a center of said ring, said ring having first and second adjacent end portions;
• first and second cam members rotatably coupled to said first and second end portions each about a respective rotation axis, each said rotation axis is perpendicular to said longitudinal axis, respectively, said first and second cam members each having a cam surface engageable with the other cam member upon rotation thereof to drive said first and second ring end portions apart from one another and thereby radially expand said ring, wherein said first and second cam members each further include a plurality of ratchet teeth, and said first and second ring end portions each include a ratchet pawl sequentially engageable with respective said ratchet teeth of said first and second cam members upon rotation of said first and second cam members in a first direction to thereby prevent rotation of said first and second cam members in a second direction opposite said first direction.