Portable hoist

A unit usable as a hoist, puller or the like comprising a cable drum, support means rotatably mounting said cable drum, ratchet means in connection with said drum, a displaceable retainer pawl for ratchet means normally biased to hold said ratchet means and the drum thereby but arranged to permit the advance thereof, a lever arm in connection with said support means, a feed pawl on said lever arm, said lever arm being pivotally mounted for movement of said feed pawl to and from said ratchet means, means mounting said feed pawl for selectively orienting the same in one position for directly engaging and advancing said ratchet means on movement of said lever in one sense or in another position in which said pawl would normally be displaced from said ratchet means on advance thereof in said one sense and in a position to displace said displaceable retainer pawl, and means on said support means selectively positionable to provide for control of said retainer pawl and to predetermine the increment of retrograde movement of said drum on displacement of said retainer pawl, said selectively positionable means including latch means which are so arranged in one position to hold said retainer pawl disengaged from said ratchet means upon displacement thereof from said ratchet means and said lever arm including a portion thereof operable on movement of said lever arm in a direction opposite to said one sense positively to disable said latch means to provide for a reengagement of said retainer pawl with said ratchet means at a predetermined point in the movement of said lever arm in said opposite sense.

A unit usable as a hoist, puller or the like comprising a cable drum, support means rotatably mounting said cable drum, ratchet means in connection with said drum, a displaceable retainer pawl for said ratchet means normally biased to hold said ratchet means and the drum thereby but arranged to permit the advance therof, a lever arm in connection with said support means, a feed pawl on said lever arm, said lever arm being pivotally mounted for movement of said feed pawl to and from said ratchet means, means mounting said feed pawl for selectively orienting the same in one position for directly engaging and advancing said ratchet means on movement of said lever in one sense or in another position in which said pawl feed would normally be displaced from said ratchet means on advance thereof in said one sense and in a position to displace said displaceable retainer pawl, said retainer pawl having, in association therewith, a stop pawl, said stop pawl and retainer pawl having a common pivotal mount, said stop pawl having stop portions to opposite sides of said retainer pawl, one of said stop portions being normally engaged with one side of the retainer pawl while the other is spaced from an opposite side thereof, means providing a biased relation between said stop and retainer pawls and providing for a lost motion of said stop pawl in displacement of said retainer pawl under the influence of a displaced feed pawl, and means on said support means selectively positionable to provide for control of said stop pawl and to predetermine the increment of retrograde movement of said drum on displacement of said retainer pawl.

A unit usable as a hoist, puller or the like comprising a cable drum, support means mounting said cable drum for rotation thereon, a ratchet means in connection with said drum, a retainer pawl for said ratchet means normally biased to hold said ratchet means and said drum thereby, said retainer pawl being adapted for displacement from said ratchet means to permit the advance of said drum, an actuating lever mounting a feed pawl for pivotal movement thereon, said actuating lever being pivotally connected to said support means and embodying means for selectively orienting said feed pawl in one position for directly engaging said advancing said ratchet means and said drum on movement of said lever in one sense or in another position in which said pawl is normally displaced from said ratchet means on advance thereof in said one sense, said actuating lever including means defining an opening therein and said means for selectively orienting said feed pawl in said one position or another including a tensioning unit disposed in said opening one end portion of which tensioning unit is anchored to said lever within said opening and an opposite end portion of which is engaged to said feed pawl within said opening, said feed pawl having, in connection therewith, means defining a guide surface on which the engaged end of said tensioning unit bears in tension, said guide surface being smoothly continuous, arcuate in form and free of offsets or depressions and having terminal ends, and the opening in said actuating lever in which said tensioning unit is located being configured to provide that a finger of a user may be applied directly to said tensioning unit to cause the same to move in lever-like fashion to have the end thereof engaged to said guide surface bearingly move to one or the other end thereof, through the medium of which said tensioning unit will then apply tension to fix said feed pawl in either said one position in which it may engage with said ratchet means or another position in which it is displaced therefrom.

A unit usable as a hoist, puller or the like comprising a cable drum, support means mounting said cable drum for rotation thereon, a ratchet means in connection with said drum, a retainer pawl for said ratchet means normally biased to hold said ratchet means and said drum thereby, said retainer pawl being adapted for displacement from said ratchet means to permit an advance of said drum, an actuating lever mounting a feed pawl for pivotal adjustment thereon, said actuating lever being pivotally connected to said support means and embodying means for selectively orienting said feed pawl in one position for directly engaging said advancing said ratchet means and said drum on movement of said lever in one sense or in another position in which said feed pawl is normally displaced from said ratchet means on advance thereof in said one sense, said support means including a frame comprised of opposed plates held in a parallel spaced relation intermediate their respective ends, adjacent of which ends are turned over, overlapped and so interconnected as to form flats to either end of said fram, said opposed plates forming said frame being transversely bridged by pivot means providing a mount of said cable drum for rotation on and within said frame and wherein said retainer pawl has, in association therewith, a stop pawl, said retainer and stop pawls having a common pivotal mount and being mounted for relative pivotal movement on said frame, and said stop pawl forms a pocket nesting said retainer pawl, the remote sides of which pocket dispose to opposite sides of said retainer pawl to define limits for the pivoting movement of said stop pawl relative to said retainer pawl, wherein means are included to provide a biased relation between said retainer pawl and said stop pawl which provides for a lost motion of said stop pawl under the influence of said feed pawl as it is moved in said displaced position thereof to effect a displacement of said retainer pawl from said drum, and additional pivot means disposed in bridging relation to the opposed plates forming said frame pivotally mounting said retainer and stop pawls, and a biasing spring mounted on said additional pivot means one end of which is anchored with respect to said frame and the other of which provides said normal bias to position said retainer pawl to hold said ratchet means.

A unit usable as a hoist, puller or the like comprising a cable drum, support means mounting said cable drum for rotation thereon, a ratchet means in connection with said drum, a retainer pawl for said ratchet means normally biased to hold said ratchet means and said drum thereby, said retainer pawl being adapted for displacement from said ratchet means to permit the advance of said drum, an actuating lever mounting a feed pawl for pivotal movement thereon, said actuating lever being pivotally connected to said support means and embodying means for selectively orienting said feed pawl in one position for directly engaging and advancing said ratchet means and said drum on movement of said lever in one sense or in another position in which said pawl is normally displaced from said ratchet means on advance thereof in said one sense, said actuating lever including means defining an opening therein and said means for selectively orienting said feed pawl in said one position or another including a tensioning unit disposed in said opening one end portion of which tensioning unit is anchored to said lever within said opening and an opposite end portion of which is engaged to said feed pawl within said opening, said feed pawl having, in connection therewith, means defining a guide surface on which the engaged end of said tensioning unit bears in tension, said guide surface being smoothly continuous, arcuate in form and free of offsets or depressions and having terminal ends, said tensioning unit being a lever-like spring device responding to the direct application of pressure in a longitudinally extending plane thereof to cause the same to move in lever-like fashion providing that the end thereof engaged to said guide surface will bearingly move to one or the other end thereof and apply tension to fix said feed pawl in either said one position in which it may engage with said ratchet means or other position in which it is displaced therefrom.