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US 4,184,657 AGranted
Climbing aids
OwnerRaymond D. Jardineinventor
Life of this patent
Estimating the term…
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OwnerRaymond D. Jardineinventor
Estimating the term…
A climbing aid having a support bar, a spindle mounted on the support bar, two pairs of cam members pivotally mounted on the spindle adapted for opposite pivotal movement from a "closed" position to an "open" position, and spring members mounted on the spindle between each pair of cam members which act to apply force to each cam member to urge it into its open position. An operating bar is slidably mounted on the support bar and is connected to each cam member, there being at the opposite end of the support bar to the spindle an attachment point for a climbing rope. A downward force on the operating bar puts the cams into the "closed" position so that the climbing aid can be inserted into a crack formed in rock or the like. The bar is then released and the spring members force the cams into their "open" position to lock the climbing aid within the crack. The support bar may also include means to hold the operating bar in a position where the cam members are in the "closed" position.
A climbing aid comprising a support bar, a spindle mounted on the support bar, at least two cam members pivotally mounted on the spindle and adapted for opposite pivotal movement from a "closed" position to an "open" position, means to apply a force to each cam member to urge it to its "open" position, an operating bar slidably mounted on the support bar and connected to each cam member and there being at the opposite end of the support bar to the spindle an attachment point for a climbing rope.
A climbing aid comprising a support bar, a spindle mounted on the support bar, two pairs of cam members pivotally mounted on the spindle and adapted for opposite pivotal movement from a "closed" position to an "open" position, one pair of the cam members on each side of the support bar being mutually spring loaded towards the "open" position by a coil spring mounted on the spindle between the cam members of each pair, an operating bar slidably mounted on the support bar and connected to each cam member, means provided on the support bar to hold the operating bar in a position where the cam members are in the "closed" position, and an attachment point for a climbing rope formed at the opposite end of the support bar to the spindle.
Dependencies are inferred from the claim text.