Breakaway coupling with flapper valve
First Claim
1. A breakaway coupler for coupling an upstream hose with a downstream hose for passing fluid therebetween when coupled and closing flow when uncoupled, the breakaway coupler comprising:
- an upstream housing securable to the upstream hose;
an upstream coupling member secured to the upstream housing and having a flow passage for fluid communication with the upstream hose;
a downstream housing securable to the downstream hose;
a downstream coupling member secured to the downstream housing and having a flow passage for fluid communication with the downstream hose;
a locking member carried by one of the upstream and downstream coupling members for selectively locking with the other of the upstream and downstream coupling member;
an upstream flapper pivotally secured with respect to the upstream housing and movable between an open and closed position to open and close flow through the upstream coupling member, the upstream flapper having a first engagement surface and a second engagement surface angled with respect to the first engagement surface, the first and second engagement surfaces radially spaced from a flapper axis of rotation; and
a pushrod axially movable with respect to the upstream housing in response to axial movement of the coupling members, the pushrod having an end surface engageable with the first engagement surface for moving the upstream flapper to the open position and engageable with the second engagement surface to retain the upstream flapper in the open position, such that locking the upstream and downstream coupling members opens the upstream flapper and unlocking the upstream and downstream coupling members allows the upstream flapper to close.
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Accused Products
Abstract
A breakaway coupler for coupling upstream and downstream hose includes one or more locking balls carried by a downstream coupling member. An upstream flapper is pivotally secured with respect to an upstream housing. A pushrod is axially movable in response to engagement by the downstream coupling member. A pry recess on the downstream coupling member is spaced between the downstream housing g and the upstream housing, such that a tool inserted into the pry recess is leverageable to move the downstream coupling member to unlock the breakaway coupler.
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Citations
17 Claims
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1. A breakaway coupler for coupling an upstream hose with a downstream hose for passing fluid therebetween when coupled and closing flow when uncoupled, the breakaway coupler comprising:
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an upstream housing securable to the upstream hose;
an upstream coupling member secured to the upstream housing and having a flow passage for fluid communication with the upstream hose;
a downstream housing securable to the downstream hose;
a downstream coupling member secured to the downstream housing and having a flow passage for fluid communication with the downstream hose;
a locking member carried by one of the upstream and downstream coupling members for selectively locking with the other of the upstream and downstream coupling member;
an upstream flapper pivotally secured with respect to the upstream housing and movable between an open and closed position to open and close flow through the upstream coupling member, the upstream flapper having a first engagement surface and a second engagement surface angled with respect to the first engagement surface, the first and second engagement surfaces radially spaced from a flapper axis of rotation; and
a pushrod axially movable with respect to the upstream housing in response to axial movement of the coupling members, the pushrod having an end surface engageable with the first engagement surface for moving the upstream flapper to the open position and engageable with the second engagement surface to retain the upstream flapper in the open position, such that locking the upstream and downstream coupling members opens the upstream flapper and unlocking the upstream and downstream coupling members allows the upstream flapper to close. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A breakaway coupler for coupling an upstream hose with a downstream hose for passing fluid therebetween when coupled and closing flow when uncoupled, the breakaway coupler comprising:
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an upstream housing securable to the upstream hose;
an upstream coupling member secured to the upstream housing and having a flow passage for fluid communication with the upstream hose;
a downstream housing securable to the downstream hose;
a downstream coupling member secured to the downstream housing and having a flow passage for fluid communication with the downstream hose;
one or more locking balls carried by the downstream coupling member;
one or more outwardly facing locking recesses on the upstream coupling member, the one or more locking balls movable radially inward into the one or more outwardly facing locking recesses to lock the upstream and downstream coupling members;
a trigger member radially outward of the one or more locking balls and having one or more inwardly facing unlocking recesses;
a trigger spring axially biasing the downstream housing from the trigger member to position the locking member at least partially downstream from the one or more inwardly facing unlocking recesses, to maintain locking of the upstream and downstream coupling members;
an upstream flapper pivotally secured with respect to the upstream housing and movable between an open and closed position to open and close flow through the upstream coupling member, the upstream flapper having a first engagement surface and a second engagement surface angled with respect to the first engagement surface; and
a pushrod axially movable in response to engagement by the downstream coupling member, the pushrod having an end surface engageable with the first engagement surface for moving the upstream flapper to the open position and engageable with the second engagement surface to retain the upstream flapper in the open position, such that locking the upstream and downstream coupling members opens the upstream flapper and unlocking the upstream and downstream coupling members allows the upstream flapper to close. - View Dependent Claims (15, 16, 17)
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Specification