Unitary, ridged and ratcheted pulley block
OwnerGerald M. Kingeryinventor
Life of this patent
Estimating the term…
Abstract
A ratchet for use with a cord includes a pair of opposed tear drop shaped members defining a one piece housing for rotatably supporting a one piece ratchet spool, a pivotally mounting a thumb release and supporting an angularly displacable hook. Circular cavities are disposed within the members to rotatably support corresponding bosses extending from opposed sides of the spool. A plurality of studs, one of which provides support for the hook, extend from one member into corresponding cavities of the other member and are sonically welded or otherwise permanently fixed therein. A steel pin, having opposed ends inserted into cavities in the opposed members, mounts the thumb release and an associated spring.
Claims32
A ratchet for use with a cord, said ratchet comprising in combination:
- a) first and second members affixed to one another to form a housing;
- b) a spool having first and second wheels secured to one another to mechanically capture the cord, said spool including a circular boss formed on each of said first and second wheels and extending from opposed sides of said spool for journalling said spool;
- c) a cavity having a cylindrical side wall and a surface of the respective one of said first and second members intersecting said side wall and formed in a respective one of said first and second members for receiving and rotatably supporting the respective one of said bosses of said spool within said housing;
- and
- d) a thumb release pivotally mounted within said housing for engaging said spool to prevent rotation of said spool in one direction.
A ratchet, said ratchet comprising in combination:
- a) a housing, said housing including a pair of opposed cavities formed therein, each cavity of said pair of cavities including a cylindrical side wall and a surface intersecting said side wall;
- b) a spool, said spool including a pair of circular bosses extending in from opposed sides of said spool for mating engagement with said pair of cavities to rotatably support said spool within said housing;
- and
- c) a thumb release for selectively restricting rotation of said spool.
A ratchet for use with a cord, said ratchet comprising in combination:
- a) first and second members affixed to one another to form a housing;
- b) a spool including first and second wheels having a common axis of rotation and secured to one another to mechanically capture the cord and means for preventing independent rotation of said first wheel relative to said second wheel, said first wheel including a first cylindrical boss centered upon the axis of rotation and extending in a first direction, said second wheel including a second cylindrical boss centered upon the axis of rotation and extending in a second direction opposite from the first direction;
- c) first and second cavities formed in respective ones of said first and second members for receiving and rotatably supporting the respective ones of said first and second bosses within said housing, each cavity of said first and second cavities including a cylindrical side wall and a surface of the respective one of said first and second members intersecting said side wall;
- and
- d) a pivotally mounted thumb release for selectively engaging said spool to prevent rotation of said spool in one direction.
A ratchet for use with a cord, said ratchet comprising in combination:
- a) first and second members affixed to one another to form a housing;
- b) a spool including first and second wheels having a common axis of rotation and secured to one another to mechanically capture the cord, said first wheel including a key extending therefrom along the axis of rotation, said second wheel including a keyway extending along the axis of rotation for receiving said key to prevent independent rotation of said first wheel relative to said second wheel;
- c) means for rotatably supporting said first and second wheels within said housing, said supporting means including a circular boss formed on each of said first and second wheels and extending from opposed sides of said spool for journalling said spool and a cavity having a cylindrical side wall and a surface intersecting said side wall and formed in each of said first and second members for receiving and rotatably supporting the respective one of said bosses;
- and
- d) a pivotally mounted thumb release for selectively engaging said spool to prevent rotation of said spool in one direction.
Dependencies are inferred from the claim text.