A safety tank cover clamp 10 has first and second elongated claw members 24 and 25 pivotally attached to yoke member 11. Threaded cylindrical traveler member 17 is treadedly engaged with treaded throughhole 16 in yoke member 11. Upper end 18 of traveler member 17 has handle 20 pivotally attached thereto. Lower end 19 of traveler member 17 supports a pivotally mounted engagement foot 22 for engaging tank opening cover 3. Right and left springs 31 and 32 are each generally centrally attached to one of the elongated claw members. The second ends of right and left springs 31 and 32 are attached to pivotally mounted spring centering bracket 34 which itself is centrally and pivotally attached to yoke member 11.
