Seal assembly for control lever

Claim 2

In combination, a wall having an enlarged opening therein, a seal assembly for sealing said enlarged opening in said wall, a control lever extending through the enlarged opening and being supported for pivotal movement about first and second mutually perpendicular non-intersecting axes with the first axis being located further from said wall than the second axis, said seal assembly comprising a stationary base member and first and second seal members adapted to be carried by the control lever and to move relative to the base member during movement of the control lever, said base member having an opening to allow movement of said control lever about said first and second axes, a first groove formed in said base member and having a first curved surface located on a sector of a circle generated by a point on said control lever as the latter is pivoted about said first axis, the first seal member being located in said first groove and having a complementary curved surface sealingly engaging said first curved surface of said first groove, a second groove formed in said first seal member and having a second curved surface located on a sector of a circle generated by a point located on the control lever as the latter is pivoted about the said second axis, said second seal member located in the second groove and having a complementary curved surface sealingly engaging said second curved surface of said second groove, the arrangement being such that when the control lever is pivoted about the first axis the first and second seal members move relative to the base member and when the control lever is pivoted about the second axis the second seal member moves relative to the first seal member and the base member.

Claim 3

In combination, a wall having an enlarged opening therein, a seal assembly for sealing said enlarged opening in said wall, a control lever extending through the enlarged opening and being supported for pivotal movement about first and second mutually perpendicular non-intersecting axes with the first axis being located further from said wall than the second axis, said seal assembly comprising a stationary base member and first and second seal members adapted to be carried by the control lever and to move relative to the base member during movement of the control lever, said base member having an opening to allow movement of said control lever about said first and second axes and being attached to said wall so that the latter mentioned opening registers with said enlarged opening in the wall, a first groove formed in said base member and being defined by a pair of side walls and a first curved surface located on a sector of a circle generated by a point on said control lever as the latter is pivoted about said first axis, the first seal member being located in said first groove and having a complementary curved surface sealingly engaging said first curved surface of said first groove, a second groove formed in said first seal member and being defined by a pair of side walls and a second curved surface located on a sector of a circle generated by a point located on the control lever as the latter is pivoted about the said second axis, said second seal member located in the second groove and having a complementary curved surface sealingly engaging said second curved surface of said second groove, the arrangement being such that when the control lever is pivoted about the first axis the first and second seal members move relative to the base member and when the control lever is pivoted about the second axis the second seal member moves relative to the first seal member and the base member.

Claim 4

In combination, a wall having an enlarged opening therein, a seal assembly for sealing said enlarged opening in said wall, a control lever extending through the enlarged opening and being supported for pivotal movement about first and second mutually perpendicular non-intersecting axes with the first axis being located further from said wall than the second axis, said seal assembly comprising a stationary base member and first and second seal members adapted to be carried by the control lever and to move relative to the base member during movement of the control lever, said base member having an opening to allow movement of said control lever about said first and second axes and being attached to said wall so that the latter mentioned opening registers with said enlarged opening in the wall, a first groove formed in said base member and being defined by a pair of side walls and a first curved surface located on a sector of a circle generated by a point on said control lever as the latter is pivoted about said first axis, the first seal member being located in said first groove and having a complementary curved surface sealingly engaging said first curved surface of said first groove, a second groove formed in said first seal member and being defined by a pair of side walls and a second curved surface located on a sector of a circle generated by a point located on the control lever as the latter is pivoted about the said second axis, said second seal member located in the second groove and having a complementary curved surface sealingly engaging said second curved surface of said second groove, the arrangement being such that when the control lever is pivoted about the first axis the first and second seal members move relative to the base member and when the control lever is pivoted about the second axis the second seal member moves relative to the first seal member and the base member.

Claim 5

In combination, a wall having an enlarged opening therein, a seal assembly for sealing said enlarged opening in said wall, a control lever extending through the enlarged opening and being supported for pivotal movement about first and second mutually perpendicular non-intersecting axes with the first axis being located further from said wall than the second axis, said seal assembly comprising a base member and first and second seal members adapted to be carried by the control lever and to move relative to the base member during movement of the control lever, said base member having an opening to allow movement of said control lever about said first and second axes, means for attaching said base member to said wall so that the opening in the base member registers with said enlarged opening in the wall, a first groove formed in said base member and having a first curved surface located on a sector of a circle generated by a point on said control lever as the latter is pivoted about said first axis, the first seal member being located in said first groove and having a complementary curved surface sealingly engaging said first curved surface of said first groove, said first seal member having an oblong slot formed therein for accommodating said control lever, a second groove formed in said first seal member and having a second curved surface located on a sector of a circle generated by a point located on the control lever as the latter is pivoted about the said second axis, said second seal member located in the second groove and having a complementary curved surface sealingly engaging said second curved surface of said second groove, the arrangement being such that when the control lever is pivoted about the first axis the first and second seal members move relative to the base member and when the control lever is pivoted about the second axis the second seal member moves relative to the first seal member and the base member.

Claim 6

In combination, a wall having an enlarged opening therein, a seal assembly for sealing said enlarged opening in said wall, a control lever extending through the enlarged opening and being supported for pivotal movement about first and second mutually perpendicular non-intersecting axes with the first axis being located further from said wall than the second axis, said seal assembly comprising a base member and first and second seal members adapted to be carried by the control lever and to move relative to the base member during movement of the control lever, said base member having an opening to allow movement of said control lever about said first and second axes, means for attaching said base member to said wall so that the opening in the base member registers with said enlarged opening in the wall, a first groove formed in said base member and having a first curved surface located on a sector of a circle generated by a point on said control lever as the latter is pivoted about said first axis, the first seal member being located in said first groove and having a complementary curved surface sealingly engaging said first curved surface of said first groove, said first seal member having an oblong slot formed therein for accommodating said control lever, a second groove formed in said first seal member and having a second curved surface located on a sector of a circle generated by a point located on the control lever as the latter is pivoted about the said second axis, said second seal member located in the second groove and having a complementary curved surface sealingly engaging said second curved surface of said second groove, the arrangement being such that when the control lever is pivoted about the first axis the first and second seal members move relative to the base member and when the control lever is pivoted about the second axis the second seal member moves relative to the first seal member and the base member.