Tools – Wrench – screwdriver – or driver therefor – Machine
Patent
1980-11-12
1983-01-18
Jones, Jr., James L.
Tools
Wrench, screwdriver, or driver therefor
Machine
B25B 2902
Patent
active
043686559
ABSTRACT:
A continuous ratchet drive, especially for use in a wrench for tightening or loosening a threaded connector, mainly comprises a support on which a ratchet gear is mounted for rotation about its axis. The ratchet drive includes further a pair of drive pawls engaging with free ends thereof the teeth of the ratchet gear, a cylinder mounted on the support, a piston reciprocable in the cylinder and having a piston rod connected at one end to the piston and a transmission arrangement between the other end of the piston rod and the drive pawls constructed and arranged to move during the forward stroke of the piston one of the drive pawls along an active stroke driving the ratchet gear in a given direction through a given angle while moving the other drive pawl along a return stroke opposite to the active stroke of the one drive pawl over at least one tooth of the ratchet gear, and to move during the rearward stroke of the piston rod the other drive pawl along its active stroke and the one drive pawl along its return stroke so that the ratchet gear is continuously rotated during reciprocation of the piston in the cylinder.
REFERENCES:
patent: 4027561 (1977-06-01), Junkers
patent: 4079641 (1978-03-01), Junkers
patent: 4086830 (1978-05-01), Latham
Jones Jr. James L.
Striker Michael J.
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