B - Operations – Transporting – 26 – D
Patent
B - Operations, Transporting
26
D
164/120
B26D 5/12 (2006.01) B21D 28/20 (2006.01)
Patent
CA 1162142
GA1-4P-6532 SHOCK DAMPENING SYSTEM FOR PRESSES Abstract of the Disclosure An improved hydraulic fluid shock dampening system is disclosed for a shearing press to minimize shock loading vibra- tion, and the level of noise emanating upon breakthrough of the material being sheared. The system includes cylinder and piston units interposed between the press bed and slide, each providing a variable volume fluid receiving chamber from which fluid under pressure is expelled during movement of the slide toward the bed to achieve a shearing operation. A flow sensitive valve in com- munication with the chambers has a first fixed flow rate there- across during the shearing operation, and prior to breakthrough, and is responsive to accelerated movement of the slide upon break- through to provide a second and substantially lower fixed flow rate thereacross during completion of the movement of the slide toward the press bed.
385161
Gowling Lafleur Henderson Llp
Gulf & Western Manufacturing Company
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