Aircraft lavatory drain plug

Claim 2

In combination with a valve of the type attachable to an aircraft lavatory drain port, the valve being generally tubular and axially alignable with the port and having a lateral outlet integratedly formed therewith, the valve including means for engaging a port plug to move the plug into and out of engagement with the port, the improvement comprising: the port plug comprising: a. a base plate; b. a first cam mounted on the base plate in fixed relationship therewith; c. radially expandable means connected for relative rotatable relationship with the first cam, the radially expandable means including: i a disc portion; and ii radial expanders pivotally mounted on the disc, each of the expanders including a radially inwardly facing peripheral surface being generally annular and having alternate curvilinear and rectilinear portions; d radially outwardly facing peripheral surface means on the first cam being generally annular and having alternate curvilinear and rectilinear portion for cooperating engagement with the alternate curvilinear and rectilinear portions, respectively, of the expanders, and, upon relative rotating motion between the first cam and the expandable means, for pivoting the expanders radially outwardly with respect to the disc portion due to engagement of the curvilinear and rectilinear portions of the cam with the rectilinear and curvilinear portions, respectively, of the expanders; e resilient seal means embracing the expanders for radial outward expansion therewith into radial sealing engagement with the port; f a second cam mounted on the base plate in relative rotatable relationship therewith; and g locking means mounted on the base plate for outward slidable radial extension thereof with respect to the base plate into locking engagement with the port upon rotation of the second cam

Claim 3

In combination with a valve of the type attachable to an aircraft lavatory drain port, the valve being generally tubular and axially alignable with the port and having a lateral outlet integratedly formed therewith, the valve including means for engaging a port plug to move the plug into and out of engagement with the port, the improvement comprising: the port plug including: a. a base plate; b. a first cam mounted on the base plate in fixed relationship therewith; c. radially expandable means connected for relative rotatable relationship with the first cam, the radially expandable means including: i. a disc portion; ii. radial expanders pivotally mounted on the disc, each of the expanders including a radially inwardly facing annular peripheral surface; and iii. flat portions formed on the radially inwardly facing annular peripheral portion of each expander; d. radially outwardly facing annular peripheral surface means on the first cam having flat means formed thereon for cooperating engagement with the annular inwardly facing surface and the flat portion, respectively, of each expander, and, upon relative rotating motion between the first cam and the expandable means, for pivoting the expanders radially outwardly with respect to the disc portion due to engagement of the annular outwardly facing surface means and the flat means of the cam with the flat portions and the annularly inwardly facing surface, respectively, of the expanders; e. resilient seal means embracing the expanders for radial outward expansion therewith into radial sealing engagement with the port; f. a second cam mounted on the base plate in relative rotatable relationship therewith; and g. locking means mounted on the base plate for outward slidable radial extension thereof with respect to the base plate into locking engagement with the port upon rotation of the second cam.

Claim 4

In combination with a valve of the type attachable to an aircraft lavatory drain port, the valve being generally tubular and axially alignable with the port and having a lateral outlet integratedly formed therewith, the valve including means for engaging a port plug to move the plug into and out of engagement with the port, the improvement comprising: the port plug including: a. a base plate; b. a first cam mounted on the base plate in fixed relationship therewith; c. radially expandable means connected for relative rotatable relationship with the first cam, the radially expandable means including: i. a disc portion; ii. radial expanders pivotally mounted on the disc, each of the expanders including a radially inwardly facing annular peripheral surface; and iii. flat portions formed on the radially inwardly facing annular peripheral portion of each expander; d. radially outwardly facing annular peripheral surface means on the first cam having flat means formed thereon for cooperating engagement with the annular inwardly facing surface and the flat portion, respectively, of each expander, and, upon relative rotating motion between the first cam and the expandable means, for pivoting the expanders radially outwardly with respect to the disc portion due to engagement of the annular outwardly facing surface means and the flat means of the cam with the flat portions and the annularly inwardly facing surface, respectively, of the expanders; e. resilient seal means embracing the expanders for radial outward expansion therewith into radial sealing engagement with the port; f. a second cam mounted on the base plate in relative rotatable relationship therewith; and g. locking means mounted on the base plate for outward slidable radial extension thereof with respect to the base plate into locking engagement with the port upon rotation of the second cam.