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US 5,341,725 AGranted
Twin piston power cylinder
OwnerJames B. Dickinventor
Life of this patent
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OwnerJames B. Dickinventor
Estimating the term…
A power cylinder (10) has two pistons (12, 20) slidably mounted within separate cylinders (14, 22) to define inner and outer chambers (16, 18; 24, 26) within each cylinder. One or more rods (28) are coupled between the pistons. The outer chambers (18, 26) are coupled together to allow pressurized hydraulic or pneumatic fluid to flow therebetween. The inner chambers (16, 24) are coupled together to allow pressurized hydraulic or pneumatic fluid to flow therebetween. The fluid flow aforesaid may be achieved by using two hollow rods (128, 130) and allowing the fluid to flow through the rods between the respective chambers. A guard (44) may surround first and second cylinders (14, 22). Bearings (46, 48) may be fixed around the opposed inner ends of cylinders (14, 22) to allow slidable displacement of the cylinders relative to guard (44). Seals (146, 148) may be fixed around the opposed inner ends of cylinders (114, 122) to provide a hydraulic chamber (158) enclosed by the guard (144) between the cylinders (114, 122). Where two rods interconnect the dual cylinders, the first piston (212) may be connected to the second cylinder (222) and the first cylinder (214) may be connected to the second piston (220).
A power cylinder (10) having a first piston (12) slidably mounted within a first cylinder (14) to define inner and outer chambers (16, 18) within said first cylinder, a second piston (20) slidably mounted within a second cylinder (22) to define inner and outer chambers (24, 26) within said second cylinder and at least one rod (28) coupled between said first and second pistons, characterized by:
A power cylinder as defined in claim 3, further comprising filtration means (151, 153) for preventing foreign matter penetration between said guard and said first or second cylinders.
A power cylinder (100) having a first piston (112) slidably mounted within a first cylinder (114) to define inner and outer chambers (116, 118) within said first cylinder, a second piston (120) slidably mounted within a second cylinder (122) to define inner and outer chambers (124, 126) within said second cylinder, characterized by:
A power cylinder (200) having a first piston (212) slidably mounted within a first cylinder (214) to define inner and outer chambers (216, 218) within said first cylinder, and a second piston (220) slidably mounted within a second cylinder (222) to define inner and outer chambers (224, 226) within said second cylinder, characterized by:
A power cylinder (300) having a first piston (312) slidably mounted within a first cylinder (314) to define inner and outer chambers (316, 318) within said first cylinder, and a second piston (320) slidably mounted within a second cylinder (322) to define inner and outer chambers (324, 326) within said second cylinder, characterized by:
A power cylinder (400) having a first piston (412) slidably mounted within a first cylinder (414) to define inner and outer chambers (416, 418) within said first cylinder, a second piston (420) slidably mounted within a second cylinder (422) to define inner and outer chambers (424, 426) within said second cylinder, characterized by:
Dependencies are inferred from the claim text.