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US 4,539,732 AGranted
Double locking safety snap
AssigneeD B Industries, Inc.
InventorJames T. Wolner
Life of this patent
Estimating the term…
Abstract
A double lock safety hook adapted to a single lock hook permitting a belt connection, such as a fall protection device, window washer's harness, and the like, to be retained within a hook throat. A snap keeper is engageable with the latch member to lock the latch member with the latch member abutting the hook nose so that accidental release of the belt connection is reduced. The snap keeper is mounted along and in juxtaposition to the shank of the single lock hook and is easily installed on equipment without the necessity of drilling holes in the hook body. A means for positioning the keeper along the shank is also provided for moving the keeper between its first and second positions.
Claims10
A double lock safety hook for reliably retaining a single lock snap system and for anchoring a belt connection, comprising:
- a shank having a return portion at one end thereof to define a hook and having a nose spaced from the shank to define a hook throat;
- means on the other end of said shank for attaching the load support member;
- a latch member having one end pivotally mounted on said shank and the other end engageable with said hook nose to close said hook throat, said latch member is movable between a close position, wherein the belt connection is retained within said hook throat by means of said latch member engaging said hook nose, and an open position, wherein the belt connection may be released from within said hook throat;
- a keeper, slidably mounted on said shank whereby no physical modification of said shank is necessary, said keeper being slidably displaceable along said shank between a first position, wherein said latch member is firmly retained in its closed position engaging said hook nose, and a second position wherein said latch member is capable of moving into its open position disengaging said hook nose and opening said hook throat so that the belt connection may be removed from within said hook throat;
- and
- means for biasing said keeper toward said first position.
3 more elements
The double lock safety hook for reliably retaining a single lock snap system and for anchoring a belt connection, comprising:
- a shank having a return portion at one end thereof to define a hook and having a nose spaced from the shank to define a hook throat;
- means on the other end of said shank for attaching the load support member;
- a keeper mounted adjacent to and in juxtaposition with said shank whereby no physical modification of said shank is necessary, said keeper being displaceable between a first position, wherein said latch member is firmly retained in its closed position engaging said hook nose, and a second position wherein said latch member is capable of moving into its open position disengaging said hook nose and opening said hook throat so that the belt connection may be removed from within said hook throat, wherein said keeper further includes a cover having first and second ends, and a pin which extends transversely through said keeper engaging said second end;
- and
- means for positioning said keeper along said shank to enable said keeper to be moved between its first and second positions wherein said positioning means further includes a second spring positioned between said cover and said shank with one end abutting said pin, and a wire form having one end encompassing and retained by said means for attaching the load support member and the other end including a plurality of diverging prongs which engage the opposite end of said second spring, said prongs and said pin cooperating with said second spring to move said keeper between its first and second positions.
2 more elements
A double lock safety hook for retaining a single lock snap system and for anchoring a belt connection comprising:
- a shank having a return portion at one end thereof to define a hook and having a nose spaced from the shank to define a hook throat;
- an eyelet on the other hand of said shank for attaching the load support member;
- a latch member having a curved edge and also having one end pivotally mounted on said shank and the other end engageable with said hook nose to close said hook throat;
- said latch member being movable between a closed position, wherein the belt connection is retained within said hook throat by means of said latch member engaging said hook nose, and an open position, wherein the belt connection may be released from within said hook throat;
- a keeper having an arcuate section and mounted adjacent to and in embracing juxtaposition with said shank whereby no physical modification of said shank is necessary, said keeper being movable between a first position, wherein said latch member is held in its closed position engaging said hook nose by means of said arcuate section closely abutting said curved edge, and a second position, wherein said arcuate section of said keeper may disengage said curved edge enabling said latch member to move into its open position disengaging said hook nose and opening said hook throat so that the best connection may be removed from within said hook throat;
- a cover mounted adjacent to said keeper and having first and second ends;
- said keeper further including a recessed groove for retaining and receiving said first end and a pin extending transversely therethrough engaging said second end and retaining said second end, said groove and said pin cooperating to retain said cover;
- a second spring positioned within said keeper between said cover and said shank with one end abutting said pin;
- and
- a wire form having one end encompassing said eyelet and the other end including a plurality of diverging prongs which engage one end of said second spring, said prongs and said pin cooperating with said second spring to move said keeper between its first and second positions.
7 more elements
Dependencies are inferred from the claim text.