Adjustable "over center" toggle locking plier wrench, with an optional "lock preventing latch" to allow for ratchet-like action.
The corresponding trade mark (RATCHLOK no. 1,186,455) was registered Jan. 19, 1982 and cancelled Sept. 10, 1988.
Patent nos. 372,080, 1,810,938, 2,471,734, 2,536,463 and 2,577,888 are cited as references; Richard W. Haner - patent attorney