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US 9,518,600 B2Granted
Safety hook
AssigneeUsang Industrial Co., Ltd.
InventorYu-Wen Lin
Life of this patent
Estimating the term…
Abstract
A safety hook includes a hook body and a trigger unit. The hook body has an opening. The trigger unit includes a keeper member and a trigger member. The keeper member is connected to the hook body. The trigger member is connected to the keeper member. The keeper member is operable to pivot relative to the hook body. The trigger member engages the hook body, and is unable to pivot relative to the keeper member so as to block the opening of the hook body when the keeper member is at a released position. The trigger member is moved via the keeper member to be disengaged from the hook body, and is able to pivot to unblock the opening of the hook body when the keeper member is at a pressed position.
Claims14
A safety hook, comprising:
- a hook body including:
- a base segment,
- a hook segment that extends curvedly from said base segment, and
- an auxiliary hook segment that extends from a distal end of said hook segment, said auxiliary hook segment and said base segment cooperatively defining an opening therebetween;
- and
- a trigger unit including:
- a keeper member that is connected pivotally to said base segment of said hook body, and
- a trigger member that is connected pivotally to said keeper member, said keeper member being operable to pivot relative to said base segment between a released position and a pressed position, so as to drive said trigger member to move relative to said hook body, said trigger member engaging said base segment and said auxiliary hook segment of said hook body and being unable to pivot relative to said keeper member so as to block said opening of said hook body when said keeper member is at said released position, said trigger member being disengaged from said base segment and said auxiliary hook segment of said hook body and being able to pivot relative said keeper member to unblock said opening of said hook body when said keeper member is at said pressed position;
- a first rod member that interconnects pivotally said keeper member and said base segment, and
- a second rod member that interconnects pivotally said keeper member and said trigger member;
- wherein said trigger member has a base wall that has a portion proximate to said second rod member and having an engaging surface that faces toward said hook segment;
- and
- wherein said base segment of said hook body has an abutment surface, said engaging surface abutting against said abutment surface when said keeper member is at said released position, said engaging surface being separated from said abutment surface when said keeper member is at said pressed position.
10 more elements
A safety hook comprising:
- a hook body having
- a base segment,
- a hook segment that extends curvedly from said base segment, and
- an auxiliary hook segment that extends from a distal end of said hook segment, said auxiliary hook segment and said base segment cooperatively defining an opening therebetween;
- and
- a trigger unit including
- a keeper member that is connected pivotally to said base segment of said hook body, and
- a trigger member that is connected pivotally to said keeper member, said keeper member being operable to pivot relative to said base segment between a released position and a pressed position, so as to drive said trigger member to move relative to said hook body, said trigger member engaging said base segment and said auxiliary hook segment of said hook body and being unable to pivot relative to said keeper member so as to block said opening of said hook body when said keeper member is at said released position, said trigger member being disengaged from said base segment and said auxiliary hook segment of said hook body and being able to pivot relative said keeper member to unblock said opening of said hook body when said keeper member is at said pressed position;
- wherein said base segment of said hook body is formed with a limiting groove that has opposite first and second ends;
- wherein said trigger unit further includes
- a first rod member that interconnects pivotally said keeper member and said base segment, and
- a second rod member that interconnects pivotally said keeper member and said trigger member, that extends through said limiting groove, and that is slidable within said limiting groove between said first and second ends so as to limit a range of pivot movement of said keeper member relative to said base segment, said second rod member being at said first end of said limiting groove when said keeper member is at said released position, and being moved to said second end of said limiting groove via pivot movement of said keeper member from said released position to said pressed position so as to disengage said trigger member from said base segment and said auxiliary hook segment of said hook body;
- wherein said keeper member has an operating section that is away from said first rod member for being pressed to drive said keeper member to pivot from said released position to said pressed position;
- wherein said trigger member has an operating section that is away from said second rod member for being pressed to drive said trigger member to pivot toward said hook segment of said hook body so as to unblock said opening when said keeper member is at said pressed position;
- and
- wherein said trigger member further includes:
- a pair of spaced-apart lever walls that are respectively disposed at two opposite sides of said hook body, each of said lever walls having a central portion for extension of said second rod member therethrough, a first distal portion that is proximate to said auxiliary hook segment, and a second distal portion that is distal from said auxiliary hook segment;
- a base wall that interconnects said first distal portions of said lever walls;
- a connecting pin that extends through and interconnects said second distal portions of said lever walls;
- and
- a roller member that is mounted on said connecting pin, wherein said connecting pin, said roller member and said second distal portions of said lever walls cooperatively serve as said operating section of said trigger member.
18 more elements
A safety hook, comprising:
- a hook body having
- a base segment,
- a hook segment that extends curvedly from said base segment, and
- an auxiliary hook segment that extends from a distal end of said hook segment, said auxiliary hook segment and said base segment cooperatively defining an opening therebetween;
- and
- a trigger unit including
- a keeper member that is connected pivotally to said base segment of said hook body, and
- a trigger member that is connected pivotally to said keeper member, said keeper member being operable to pivot relative to said base segment between a released position and a pressed position, so as to drive said trigger member to move relative to said hook body, said trigger member engaging said base segment and said auxiliary hook segment of said hook body and being unable to pivot relative to said keeper member so as to block said opening of said hook body when said keeper member is at said released position, said trigger member being disengaged from said base segment and said auxiliary hook segment of said hook body and being able to pivot relative said keeper member to unblock said opening of said hook body when said keeper member is at said pressed position;
- wherein said base segment of said hook body is formed with a limiting groove that has opposite first and second ends;
- wherein said trigger unit further includes
- a first rod member that interconnects pivotally said keeper member and said base segment, and
- a second rod member that interconnects pivotally said keeper member and said trigger member, that extends through said limiting groove, and that is slidable within said limiting groove between said first and second ends so as to limit a range of pivot movement of said keeper member relative to said base segment, said second rod member being at said first end of said limiting groove when said keeper member is at said released position, and being moved to said second end of said limiting groove via pivot movement of said keeper member from said released position to said pressed position so as to disengage said trigger member from said base segment and said auxiliary hook segment of said hook body;
- wherein said keeper member has an operating section that is away from said first rod member for being pressed to drive said keeper member to pivot from said released position to said pressed position;
- wherein said trigger member has an operating section that is away from said second rod member for being pressed to drive said trigger member to pivot toward said hook segment of said hook body so as to unblock said opening when said keeper member is at said pressed position;
- and
- wherein said trigger member further has:
- a pair of spaced-apart lever walls that are respectively disposed at two opposite sides of said hook body, each of said lever walls having a central portion for extension of said second rod member therethrough, a first distal portion that is proximate to said auxiliary hook segment, and a second distal portion that is distal from said auxiliary hook segment;
- a base wall that interconnects said first distal portions of said lever walls;
- and
- a pair of positioning walls that extend respectively from said second distal portions of said lever walls toward each other, and that clamp slidably said base segment of said hook body for positioning said trigger member relative to said base segment of said hook body.
17 more elements
A safety hook, comprising:
- a hook body having
- a base segment,
- a hook segment that extends curvedly from said base segment, and
- an auxiliary hook segment that extends from a distal end of said hook segment, said auxiliary hook segment and said base segment cooperatively defining an opening therebetween;
- and
- a trigger unit including
- a keeper member that is connected pivotally to said base segment of said hook body, and
- a trigger member that is connected pivotally to said keeper member, said keeper member being operable to pivot relative to said base segment between a released position and a pressed position, so as to drive said trigger member to move relative to said hook body, said trigger member engaging said base segment and said auxiliary hook segment of said hook body and being unable to pivot relative to said keeper member so as to block said opening of said hook body when said keeper member is at said released position, said trigger member being disengaged from said base segment and said auxiliary hook segment of said hook body and being able to pivot relative said keeper member to unblock said opening of said hook body when said keeper member is at said pressed position;
- wherein said base segment of said hook body is formed with a limiting groove that has opposite first and second ends;
- wherein said trigger unit further includes
- a first rod member that interconnects pivotally said keeper member and said base segment, and
- a second rod member that interconnects pivotally said keeper member and said trigger member, that extends through said limiting groove, and that is slidable within said limiting groove between said first and second ends so as to limit a range of pivot movement of said keeper member relative to said base segment, said second rod member being at said first end of said limiting groove when said keeper member is at said released position, and being moved to said second end of said limiting groove via pivot movement of said keeper member from said released position to said pressed position so as to disengage said trigger member from said base segment and said auxiliary hook segment of said hook body;
- wherein said keeper member has an operating section that is away from said first rod member for being pressed to drive said keeper member to pivot from said released position to said pressed position;
- wherein said trigger member has an operating section that is away from said second rod member for being pressed to drive said trigger member to pivot toward said hook segment of said hook body so as to unblock said opening when said keeper member is at said pressed position;
- and
- wherein said trigger unit further includes a resilient member that is connected to said base segment of said hook body for biasing said keeper member toward said released position, and for biasing said trigger member away from said hook segment of said hook body.
13 more elements
A safety hook comprising:
- a hook body having
- a base segment,
- a hook segment that extends curvedly from said base segment, and
- an auxiliary hook segment that extends from a distal end of said hook segment, said auxiliary hook segment and said base segment cooperatively defining an opening therebetween;
- and
- a trigger unit including
- a keeper member that is connected pivotally to said base segment of said hook body, and
- a trigger member that is connected pivotally to said keeper member, said keeper member being operable to pivot relative to said base segment between a released position and a pressed position, so as to drive said trigger member to move relative to said hook body, said trigger member engaging said base segment and said auxiliary hook segment of said hook body and being unable to pivot relative to said keeper member so as to block said opening of said hook body when said keeper member is at said released position, said trigger member being disengaged from said base segment and said auxiliary hook segment of said hook body and being able to pivot relative said keeper member to unblock said opening of said hook body when said keeper member is at said pressed position;
- wherein said base segment of said hook body is formed with a limiting groove that has opposite first and second ends;
- wherein said trigger unit further includes
- a first rod member that interconnects pivotally said keeper member and said base segment, and
- a second rod member that interconnects pivotally said keeper member and said trigger member, that extends through said limiting groove, and that is slidable within said limiting groove between said first and second ends so as to limit a range of pivot movement of said keeper member relative to said base segment, said second rod member being at said first end of said limiting groove when said keeper member is at said released position, and being moved to said second end of said limiting groove via pivot movement of said keeper member from said released position to said pressed position so as to disengage said trigger member from said base segment and said auxiliary hook segment of said hook body;
- wherein said keeper member has an operating section that is away from said first rod member for being pressed to drive said keeper member to pivot from said released position to said pressed position;
- wherein said trigger member has an operating section that is away from said second rod member for being pressed to drive said trigger member to pivot toward said hook segment of said hook body so as to unblock said opening when said keeper member is at said pressed position;
- and
- wherein said keeper member further has:
- a pair of spaced-apart lever walls that are respectively disposed at two opposite sides of said hook body, each of said lever walls having a central portion for extension of said first rod member therethrough, a first distal portion for extension of said second rod member therethrough, and a second distal portion that is opposite to said second rod member and that is proximate to said base segment of said hook body;
- and
- a connecting wall that interconnects said second distal portions of said lever walls, wherein said connecting wall and said second distal portions of said lever walls cooperatively serve as said operating section of said keeper member.
16 more elements
Dependencies are inferred from the claim text.