Cap and locking means therefor

Claim 2

A cap adapted to be mounted on the end of a pipe or the like to close the end of the pipe or the like, said cap having at least two locking arms pivotally attached on the external outer peripheral edge of said cap at equal angular distances from each other, each of said locking arms being pivotally mounted on said cap between the ends of said locking arm, at least two links, each link being pivotally connected to each locking arm adjacent one end of each locking arm, a handle pivotally connected to the other end of each of said links and movable toward and away from said cap, and each of said locking arms having a camming surface thereon adjacent its end remote from its pivotal connection cooperation with a surface carried by the pipe or the like when said handle is moved toward said cap to lock said cap to the end of the pipe or the like.

Claim 3

The cap according to claim 1 and an adapter for connection to the end of the pipe, said cap closing the end of the pipe by closing the end of said adapter, said adapter having the surface carried by the pipe or the like for cooperation with said surfaces of said locking arms to cause said locking arms to lock said cap to said adapter whereby said cap is locked to the pipe, and sealing means supported on one of said cap and said adapter to form a fluid seal between said cap and said adapter.

Claim 4

The cap according to claim 2 in which said sealing means is supported on said cap.

Claim 5

A cap adapted to be mounted on the end of a pipe or the like to close the end of the pipe or the like, said cap having at least two locking arms pivotally attached on the outer peripheral edge of said cap at equal angular distances from each other, each of said locking arms being pivotally mounted on said cap between the ends of said locking arm, at least two links, each link being pivotally connected to each locking arm adjacent one end of each locking arm, means to pivotally connect said links to each other adjacent the other ends thereof, each of said locking arms having its pivotal connection to said cap in substantial axial alignment with its pivotal connection to said connecting link when said cap is locked to the end of the pipe or the like, and each of said locking arms having a surface thereon adjacent its end remote from its pivotal connection to said connected link for cooperation with a surface carried by the pipe or the like when said pivotal connecting means is moved axially toward said cap to lock said cap to the end of the pipe or the like.

Claim 6

A cap adapted to be mounted on the end of a pipe or the like to close the end of the pipe or the like, said cap having at least two locking arms pivotally attached on the outer peripheral edge of said cap at equal angular distances from each other, each of said locking arms being pivotally mounted on said cap between the ends of said locking arm, at least two links, each link being pivotally connected to each locking arm adjacent one end of each locking arm, means to pivotally connect said links to each other adjacent the other ends thereof, each of said locking arms having its pivotal connection to said cap in substantial axial alignment with its pivotal connection to said connecting link when said cap is locked to the end of the pipe or the like, and each of said locking arms having a surface thereon adjacent its end remote from its pivotal connection to said connected link for cooperation with a surface carried by the pipe or the like when said pivotal connecting means is moved axially toward said cap to lock said cap to the end of the pipe or the like.

Claim 7

The cap according to claim 4 in which each of said links has its pivotal connection to said pivotal connecting means closer to said cap than its pivotal connection to said locking arm when said locking arms are in locking position.

Claim 8

The cap according to claim 1 including guide means supported by said cap to cooperate with said handle to guide said handle for movement only in the axial direction.

Claim 9

The cap according to claim 1 in which said handle is axially aligned with the pipe or the like.

Claim 10

The cap according to claim 1 including means to lock said locking arms in the locking position.

Claim 11

A cap having an axially disposed stud and adapted to be mounted on the end of a pipe or the like to close the end of the pipe, a pair of opposed locking arms pivotally mounted to said cap at first pivot points on the peripheral edge of said cap and adapted to cooperate with an outside peripheral surface on said pipe or the like to lock said cap to the end of said pipe or the like, single movable means axially aligned with said pipe and operatively connected to said locking arms to simultaneously move both of said locking arms to the locking position, said movable means including means axially slidably mounted on said stud, and a pair of link means pivotally connecting said slidably mounted means to each of said locking arms, one end of each said link means pivotally connected to saiD slidably mounted means at second pivot points on said slidably mounted means and the other end of said link means pivotally connected at third pivot points to one end of said locking arms, said second pivot points being closer to said cap than said third pivot points when said arms are in locking position, and said third pivot points being closer to said cap than said second pivot points when said arms are in unlocking position, said first and third pivot points being axially aligned when said arms are in locking position.

Claim 12

A cap having an axially disposed stud and adapted to be mounted on the end of a pipe or the like to close the end of the pipe, a pair of opposed locking arms pivotally mounted to said cap at first pivot points on the peripheral edge of said cap and adapted to cooperate with an outside peripheral surface on said pipe or the like to lock said cap to the end of said pipe or the like, single movable means axially aligned with said pipe and operatively connected to said locking arms to simultaneously move both of said locking arms to the locking position, said movable means including means axially slidably mounted on said stud, and a pair of link means pivotally connecting said slidably mounted means to each of said locking arms, one end of each said link means pivotally connected to saiD slidably mounted means at second pivot points on said slidably mounted means and the other end of said link means pivotally connected at third pivot points to one end of said locking arms, said second pivot points being closer to said cap than said third pivot points when said arms are in locking position, and said third pivot points being closer to said cap than said second pivot points when said arms are in unlocking position, said first and third pivot points being axially aligned when said arms are in locking position.