Patent for a new and improved pipe wrench. This design consists, "with the stationary jaw provided with a shank and an inclined portion on the shank, of a movable jaw, also provided with a shank, having an inclined portion on it and pivotally connected to the stationary jaw, and a loop pivoted to the stationary jaw and engaging with the shank of the movable jaw, whereby the said two inclined portions are retained in working position" (lines 85-94).