Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 7975500 | Refrigerant accumulation and oil recovery device for refrigerant fluid recovery/regeneration/recharging systems A refrigerant accumulation and oil recovery device for recovery/regeneration/recharging units for a refrigerant fluid withdrawn from refrigeration or air conditioning plants or heat pumps, characterized by comprising a refrigerant fluid accumulation/evaporation vess... | 07/12/2011 |
| 7905467 | Dual position pilot operated valve assembly A dual position pilot operated valve assembly having a main piston, with a valve member, reciprocable within a valve body, wherein the valve body is adapted for sealingly mating with a valve seat and passage located intermediate the valve body inlet and outlet ports... | 03/15/2011 |
| 7886767 | Hydraulic valve with spool position sensing assembly A hydraulic valve includes a valve body, a valve spool that is movable relative to the valve body for controlling fluid flow through the valve body, and a spool return assembly for biasing the valve spool into a centered position relative to the valve body. The hydr... | 02/15/2011 |
| 7788983 | Sensor arrangement A sensor arrangement is arranged to detect at least one position of a displaceable component in a fluid device, which fluid device comprises a wall enclosing a cavity, in which cavity the component is displaced by pressurized fluid selectively applied to the compone... | 09/07/2010 |
| 7784391 | Arrangement for controlling a hydraulically driven motor The present invention relates to an arrangement for controlling a hydraulically driven motor, forming part of a hydraulic system in which hydraulic fluid under pressure forms a main flow through a main duct in which the motor is connected. The motor drives a varying... | 08/31/2010 |
| 7684950 | System for detecting and transmitting test data from a pressure chamber filled with a high-pressure fluid The invention relates to an arrangement for detecting and transmitting test data from a housing (10) including a pressure chamber (11) that is filled with a high-pressure fluid and is homogeneously pressurized via strip conductors (21) which are... | 03/23/2010 |
| 7677527 | Dual position pilot operated valve assembly A dual position pilot operated valve assembly having a main piston, with a valve member, reciprocable within a valve body, wherein the valve body is adapted for sealingly mating with a valve seat and passage located intermediate the valve body inlet and outlet ports... | 03/16/2010 |
| 7584764 | Coaxial quick disconnect coupling A method of fluidly connecting coaxially aligned first and second couplings (50, 130), wherein the both couplings (50, 130) have an inner high pressure passage (26) and a coaxial outer lower pressure passage (53). Initially the first coup... | 09/08/2009 |
| 7569943 | Variable speed wind turbine drive and control system A variable speed wind turbine utilizes a hydraulic transmission including a hydraulic pump coupled to a rotor and a hydraulic motor coupled to an induction generator to produce variable frequency power that is converted to grid frequency power by electronic controls... | 08/04/2009 |
| 7565756 | Lost motion mechanism for movable vehicle implements A lost motion mechanism that is operatively interconnected with a hydraulic cylinder is provided. The lost motion mechanism includes an elongated rod connected with a portion of the hydraulic cylinder. An elongated sleeve member is adapted to receive at least a port... | 07/28/2009 |
| 7552671 | Cylinder with fiber optical position sensing device and method An apparatus for sensing movement of a first object relative to a second object. The apparatus includes indicia markings formed on the first object and a sensor capable of reading the indicia markings. A slipper element is secured relative to the sensor and is biase... | 06/30/2009 |
| 7516942 | Plug-style air-conditioning service valve An air-conditioning service plug-type valve includes a valve body having a chamber. First and second openings extend through the valve body. The air conditioning plug-type valve also includes a stem having a plug portion configured for being received in the chamber ... | 04/14/2009 |
| 7503173 | Control devices for swashplate type variable displacement piston pump Improvements in trunnion shaft-controlled swashplate axial hydraulic piston pumps as well as hydraulic systems used in hydrostatic transmissions utilized. e.g., in zero-turn-radius (ZTR) wheeled vehicles, such as grass mowers, with one embodiment thereof pertaining ... | 03/17/2009 |
| 7487706 | Device for controlling a hydraulically driven motor The present invention relates to an arrangement for controlling a hydraulically driven motor (2), forming part of a hydraulic system in which hydraulic fluid under pressure forms a main flow through a main duct (1) in which the motor is connected. The ... | 02/10/2009 |
| 7469718 | Quick disconnect cryogenic coupler A generally cylindrical quick disconnect female cryogenic coupler, interconnected with a cryogenic fluid transfer apparatus, includes a coupler body with a first cavity housing a laterally severed tubular bushing, an adaptor having one end attached to the coupler bo... | 12/30/2008 |
| 7455132 | Hydraulic axle combination A hydraulic axle combination includes a housing having first and second pump chambers containing spaced, axially aligned, first and second hydrostatic pumps with respective pump shafts and input gears; first and second hydraulic motors connected with respective firs... | 11/25/2008 |
| 7451790 | Device for controlling hydraulic power units An arrangement for controlling two drive units which interact with one another, one of which includes a hydraulically driven motor (2). The motor drives a varying load, and one or more valves (6, 7) control hydraulic fluid flow through the motor during... | 11/18/2008 |
| 7430860 | Hydrostatic transmission circuit Improvement in a hydrostatic valve assembly for use in a hydrostatic transmission, for controlling fluid transfer between a first, second and third line, wherein two of the lines define first and second pressure lines within a closed loop circuit. The valve assembly... | 10/07/2008 |
| 7431635 | Internal gear grinding method In a method for successively generating, on the inner peripheral surface of a ring, the individual profiles of a plurality of teeth of an internally toothed gear wheel: positioning the ring on a turntable; imparting complex motions, at a predetermined speed relation... | 10/07/2008 |
| 7404538 | Dual restrictor shut-off valve A shut-off valve for pressurized fluids in an air cooling/heating apparatus having a first duct receiving a first restrictor and a second restrictor. Both restrictors are coaxially formed with a capillary through which the pressurized fluid passes and which causes t... | 07/29/2008 |
| 7392823 | Combination valve Improvement in a combination valve including check valve and pressure relief valve portions for regulating fluid flow pressure and direction in a hydraulic circuit, wherein a valve seat includes, in addition to a central aperture, a plurality of peripherally-spaced ... | 07/01/2008 |
| 7370673 | Self-contained isolated port A service valve for a refrigerant system comprising a valve body and a system port. The valve body has at least one fluid passage integrated therein including a longitudinal bore. An orifice is located at one end of the bore. An annular protrusion axially extends fr... | 05/13/2008 |
| 7360304 | Folding stand for a portable crimping device A folding stand adapted to be secured to the bottom wall of a portable crimping device which, in a folded position, is substantially flat against a wall portion thereof and, in an unfolded position, vertically raises the crimping device to a predetermined working he... | 04/22/2008 |
| 7325477 | Device for reducing energy losses in a machinery unit The present invention relates to a device for reducing energy losses in a machinery unit (1), having at least one part (4) which is arranged to rotate in fluid about a rotation axis (6) in a substantially closed chamber (3) delimited in t... | 02/05/2008 |
| 7243499 | Refrigeration capillary tube inside suction line assembly A refrigeration capillary tube inside suction tube heat exchanger assembly, including a suction tube whose ends each have a slot with a shaped inner end portion; two braze connectors, each including a sleeve portion with the free end having a shaped recess; a capill... | 07/17/2007 |
| 7159701 | Automatic drag brake for a power take-off unit output shaft Improvement in a drag brake assembly for a power take-off unit, for use on trucks and the like, including a first reaction member axially located on an output shaft thereon; a brake disc rotatably affixed to and axially movable on the output shaft; a second reaction... | 01/09/2007 |
| 7081207 | Method for cleaning a filter element in a filtering chamber and filter carrying out the method The invention relates to a method for cleaning a filter element (9) located in a filtering chamber (10, 11) and to a filter implementing the method. The filter includes an inlet (4) leading to the inlet side (10) of the filtering chamber,... | 07/25/2006 |
| 7051996 | Plug-style air-conditioning service valve In a plug-style valve, such as an air-conditioning service plug-style valve, basically including a valve body, a stem, a retainer including a service fitting and a valve core, and a cap, the plug including an intermediate O-ring, between the valve body and the plug,... | 05/30/2006 |
| 6971625 | Pilot operated valve with variable piston orifice A valve assembly having a valve body, a piston, a modulating plug, a valve cover adjoining the valve body, and a throttling member. The valve body has an inlet and outlet port, a partition with a valve seat separating the valve body into a first and second flow pass... | 12/06/2005 |
