Expansible chamber devices inventions 09/07

20070221055 - Breathing for single acting hydraulic cylinders: A single acting hydraulic cylinder apparatus includes a mechanism operated by a single acting hydraulic cylinder, the mechanism including a hollow member. A breathing chamber is provided by sealing at least a portion of the hollow member such that outside air is prevented from entering the breathing chamber. A pressurized... Agent: Frost Brown Todd, LLC

20070221056 - Two-stage hand pump: A hand pump for inflating rafts or similar inflatables has a first piston with a relatively low pumping volume which is capable of pumping relatively small volumes of air into a raft as the raft becomes full and is approaching its maximum pressure, and a second piston with a larger... Agent: Charles D. Mcclung

20070221057 - Self-vacuum arrangement for pneumatic equipment: A self-vacuum arrangement for pneumatic equipment is provided. A Venturi device having first and second ports and a central tap is provided. A first check valve having a first port operably coupled with the central tap of the Venturi device is configured to prevent pneumatic flow from the central tap... Agent: The Ollila Law Group LLC

20070221058 - Dual actuator cylinder assembly: A dual actuator cylinder assembly includes a cylinder body defining first and second axially aligned and separated internal cavities, which extend along aligned longitudinal axes. A first piston is movably mounted in the first internal cavity for movement along the longitudinal axis of the first internal cavity, and a second... Agent: Boyle Fredrickson S.c.

20070214952 - Position measuring system for a hydraulic cylinder: This invention relates to a position measuring system for a hydraulic cylinder, which comprises at least one sensor, one magnet and a piston rod with a metallic core of high magnetic susceptibility and with a groove structure in substantially axial direction, wherein the groove structure is filled up with a... Agent: Dilworth & Barrese, LLP

20070214953 - Combined service brake and spring brake cylinder assembly: A combined service brake and spring brake cylinder for the braking system of a motor vehicle, in particular for utility vehicles, includes service and spring brake pistons guided inside a casing which is common for the two brake cylinders. The spring brake piston is loaded by at least one storage... Agent: Crowell & Moring LLP Intellectual Property Group

20070204746 - Piston pin bearing for pistons of an internal combustion engine: The invention relates to a piston pin bearing of an internal combustion engine, in which a cylindrical piston pin is mounted. The aim of the invention is to create a hub bore shape that is improved compared to prior art in order to significantly reduce mechanical stress in the piston... Agent: William Collard Collard & Roe, P.C.