| 摘要 |
A selectively operable extendable fulcrum device 100 is described. The device includes a casing 116 with a slot 124 to selectively guide and lock a selectively telescoping rod 128 into place when extended. A ridge on the inside of the casing provides a resting place for a compression spring 126. The compression spring is operable to selectively retract the telescoping rod back into its retracted position and keeps the telescoping rod and fulcrum head assembly securely in place when retracted. The fulcrum head 102 provides added leverage needed to pull out nails from materials when it is retracted as well as providing added leverage for longer nails when the fulcrum head is extended. The casing and the associated components of the device can be press fit into any conventional hammer head member.
|
