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| Number | Title | Issue Date |
| 7409902 | Actuators with connected diaphragms An actuator assembly comprises a first diaphragm (422) and a second diaphragm (424) connected to the first diaphragm for forming a chamber (426) between the first diaphragm and the second diaphragm. An actuator shaft (427) is connected to... | 08/12/2008 |
| 7295131 | Diagnostic system for detecting rupture or thinning of diaphragms A diaphragm diagnostic system for use in an industrial field device has a diaphragm and a diagnostic feature. The diaphragm is configured to couple the field device to a process fluid and has a plurality of layers. A first layer of the plurality of layers is exposed... | 11/13/2007 |
| 7090474 | Diaphragm pump with overfill limiter A diaphragm pump which overcomes the problem of diaphragm failure due to overfill of the oil transfer chamber. An overfill preventive element in the form of a mechanical stop, a fully closed coil spring, or a valve system, or alternatives are provided. ... | 08/15/2006 |
| 6994122 | Heald frame for weaving machine A heald frame for a weaving machine includes stops (15, 16) made of a material with shock-absorbing properties associated with the ends of the healds (10). A gap is provided between the heald ends and the stops, such gap ensuring that the healds can be... | 02/07/2006 |
| 6907816 | Safety diaphragm for a diaphragm pump A safety diaphragm for a diaphragm pump, which makes it possible to detect a rupture of the diaphragm during operation or when at a standstill. The diaphragm has at least two diaphragm layers (1, 2) arranged lying one on top of the other The diaphragm has a c... | 06/21/2005 |
| 6892624 | Enhanced wobble plated driven diaphragm pump A pump that has a flexible liner located adjacent to a diaphragm. The liner provides structural support for the diaphragm. The flexible liner can slide relative to the diaphragm. This relative movement reduces the stiffness of the diaphragm/liner assembly. The diaph... | 05/17/2005 |
| 6893720 | Object coated with carbon film and method of manufacturing the same An object such as an automobile part, an image forming apparatus part, a bicycle part, other machine parts, a sport article or its part, a toy or its part, or a rain article or its part has a portion to be in contact with a contact object. The contact portion is mad... | 05/17/2005 |
| 6807865 | Pressure sensor with a radially tensioned metal diaphragm A pressure sensor having a radially tensioned diaphragm for measuring fluid pressure. The pressure sensor includes a first generally concave metal body member and a second generally concave metal body member, and a radially tensioned flexible metal diaphragm located... | 10/26/2004 |
| 6796215 | Membrane pump A membrane pump (104) with an operating membrane (1) delimiting a conveying space (2), and a supplemental membrane (3) arranged on the side of the operating membrane (1) facing away from the conveying space (2), with a membr... | 09/28/2004 |
| 6790014 | Fluid cooled diaphragms for diaphragm compressors Fluid cooled diaphragms for diaphragm compressors are provided which utilize a multi-layer diaphragm with an upper or gas contacting later, and a bottom or lower layer, which has cooling grooves through which cooling fluid is circulated to reduce the diaphragm tempe... | 09/14/2004 |
| 6773236 | Internally pressurized diaphragm positive displacement pump This disclosure relates to a highly durable positive displacement pump capable of dry-priming and pumping of a liquid containing abrasive non-soluble material. The pump assembly comprises an internally pressurized diaphragm assembly secured to a pump bowl and a pump... | 08/10/2004 |
| 6612223 | Pneumatic actuator A pneumatic actuator adapted for placement between a pair of spaced members for controlling relative movement between said members is formed of two different hardness plastic materials and includes a rigid base and a flexible top member forming an interna... | 09/02/2003 |
| 6604908 | Methods and systems for pulsed delivery of fluids from a pump A system is disclosed for pumping fluids at desired average flow rates by applying a predetermined force to a pump chamber and pulsing an outlet valve of the pump chamber to deliver a fluid therefrom. In some embodiments, pump chambers are provided within... | 08/12/2003 |
| 6582206 | Diaphragm chucking with elasticity adjustment A diaphragm pump with hydraulically powered diaphragm that is so chucked on a circulating rim between a pump lid and a pump housing in a predetermined radial chucking area and with a predetermined press-on force between the pump lid and the pump housing t... | 06/24/2003 |
| 6554587 | Pump and diaphragm for use therein The pump of the present invention preferably includes a housing having an inlet port, an outlet port and a chamber located in fluid communication with the inlet port and the outlet port. A diaphragm is sealingly secured in the chamber and, together with t... | 04/29/2003 |
| 6485263 | Systems for determining the volume of a volumetric chamber and pumping a fluid with a pump chamber Reusable pump drive systems are disclosed that utilize pressurized fluids for creating a force on a flexible or moveable surface of a pump chamber of a pumping cartridge. One such system includes a variable sized orifice valve included as part of a fluid ... | 11/26/2002 |
| 6464474 | Nonrespiratory diaphragm chucking A diaphragm pump with a pump lid, a pump housing and a hydraulically powered diaphragm that is arranged between the former, that delimits a hydraulic chamber from a delivery chamber and that is clamped in a circulating rim. There is provided between the p... | 10/15/2002 |
| 6302653 | Methods and systems for detecting the presence of a gas in a pump and preventing a gas from being pumped from a pump A method and system are disclosed for detecting the presence of a gas in a pump chamber of a pumping system. The methods, and systems employing the methods, involve isolating a pump chamber from its surroundings, for example by closing an inlet and outlet... | 10/16/2001 |
| 6276907 | Hydraulically driven diaphragm pump A diaphragm pump for pumping a fluid, such as paint, includes a diaphragm separating a first chamber for accommodating and dispensing the paint from a second chamber for accommodating a drive fluid, and a piston that reciprocates to drive the drive fluid ... | 08/21/2001 |
| 6267302 | Spray gun with rolling wall diaphragm and quick disconnect housing A spray gun configured with a roiling wall diaphragm piston and vented piston cylinder connecting the needle to the needle actuator and isolating the liquid chamber of the nozzle body from the actuator section. The flange of the rolling wall diaphragm is ... | 07/31/2001 |
| 6209927 | Isolation device and fluid connection A metal diaphragm is provided which acts as a spring while defining a flow path. A restraint limits upward movement of the diaphragm during transient motion. Downward movement is resisted by a Belleville spring.... | 04/03/2001 |
| 6155535 | Diaphragm compression limit stops A diaphragm-sealed valve having stops, mechanical means placed between a top and bottom plate to control assembled thickness and/or the amount of compression applied to the diaphragm which is placed between the top and bottom plate when the diaphragm-seal... | 12/05/2000 |
| 6145430 | Selectively bonded pump diaphragm A selectively bonded two-ply diaphragm for a diaphragm pump having adjacent first and second layers of the diaphragm which are selectively bonded at the interface between the layers in at least one attachment portion, which is adapted for attachment to a ... | 11/14/2000 |
| 6080685 | Abrasion resistant plastic bonded to a diaphragm An improved diaphragm substantially resistant to abrasive wear for use in certain applications in which at least a portion of such diaphragm is in contact with another surface which would tend to abrade such diaphragm, such diaphragm comprising at least o... | 06/27/2000 |
| 6067893 | Ribbed diaphragm The present invention provides a diaphragm having a generally truncated conical body for use in diaphragm actuating piston assemblies, such diaphragm comprising at least one layer of an elastomeric material selected from a group consisting of natural rubb... | 05/30/2000 |
| 5988652 | Fluid control assembly A fluid control assembly that includes fluid valving, fluid regulation, automatic safety shut-off valving and manual shut-off valving in one assembly, a novel fluid control unit that integrates the above functions in one unit, and a novel ignitor and a no... | 11/23/1999 |
| 5899440 | Diaphragm valve A diaphragm valve having a diaphragm functioning as a valve body. Unlike the conventional valve of this type, the retainer for pressing the sealing section of the diaphragm against the valve seat is provided with a predetermined number of rectangular aper... | 05/04/1999 |
| 5863184 | Diaphragm pump apparatus In a diaphragm pump apparatus having a first chamber and a second chamber divided from the first by a movable diaphragm, the diaphragm comprises on both sides annular surfaces, whereby the annular surface is rounded out and goes over into a conically tape... | 01/26/1999 |
| 5706715 | Composite diaphragm for diaphragm pumps having two different shore-hardness materials A pump diaphragm that is composed of two different shore-hardness materials of the same base polymer. The diaphragm includes a strong layer that will withstand hydraulic pressures and one or more soft layers that can be shaped into desirable sealing confi... | 01/13/1998 |
| 5699717 | Diaphragm pump with shaped diaphragm having radially and circumferentially extending ribs A diaphragm pump (1) has a shaped diaphragm (2) of elastic material. The central zone (3) of the diaphragm (2) is thickened in the direction of stroke and is surrounded by a flexible annular zone (5) held on the pump case by an external clamping edge (6).... | 12/23/1997 |
| 5690017 | Diaphragm pump with at least one reciprocating piston and balancing device therefor A diaphragm pump 1 has a reciprocating piston 2 operated with the aid of a connecting rod 5 and by this means moves an attached diaphragm 4 fixed in the pump housing 3. The connecting rod 5, in turn, is acted upon and driven at the end facing away from th... | 11/25/1997 |
| 5615597 | Composite diaphragm for diaphragm pumps having two different shore-hardness materials A pump diaphragm that is composed of two different shore-hardness materials of the same base polymer. The diaphragm includes a strong layer that will withstand hydraulic pressures and one or more soft layers that can be shaped into desirable sealing confi... | 04/01/1997 |
| 5528975 | Booster with a porous bellows forming a filter A pneumatic brake booster having a piston which slides in a casing with a portion that extends outside of the casing. A tubular protective bellows has a first end connected to the casing and a second end that engages an input rod through which an operatio... | 06/25/1996 |
| 5437219 | Low stress conical type diaphragm A multi-thickness diaphragm member including clamping sections that are sized for assembly of the diaphragm in standard air brake valve devices and a flexure portion intermediate the clamping sections that forms a convolution during assembly. The thicknes... | 08/01/1995 |
| 5372059 | Fluid operated brake actuator with internal valve A fluid-operated brake actuator having a hollow actuator rod between a spring chamber of a spring brake housing and a spring chamber of a service brake housing incorporates a valve within the actuator rod. The valve isolates the two spring chambers from e... | 12/13/1994 |
| 5357846 | Tandem brake booster A tandem brake booster ( 12 ) having a flow path ( 145 ) between a control valve (118) and a solenoid valve (180) connected to a source of vacuum and the surrounding environment. The flow path (145) is created by first (140) and second (150) telescoping s... | 10/25/1994 |
| 5345858 | Spring brake actuator with a pressure plate bearing for a caging tool A spring brake actuator, formed by a housing having an elastomeric diaphragm dividing the interior into two chambers, comprises a pressure plate adjacent the diaphragm in one of the chambers with a large force compression spring between the pressure plate... | 09/13/1994 |
| 5335584 | Improved diaphragm The diaphragm has an outer flange and an inner portion which is deflectable relative thereto, with the inner portion having a lone, primary annular corrugation connecting a center of the inner portion to the outer flange and which, when viewed in cross se... | 08/09/1994 |
| 5333534 | Booster A brake booster, and more particularly, an improvement of a coiled spring which is disposed within a valve body to return an input shaft to its inoperative position is disclosed. The coiled spring of the invention is generally cylindrical, and is disposed... | 08/02/1994 |
| 5285716 | Spring brake assembly having tamper-resistant welded housing and method for making same Disclosed is an improved spring brake assembly, and a method for making same, which is particularly resistant to unauthorized disassembly and its consequent hazards. A diaphragm is locked between two opposing portions of a housing. The two opposing portio... | 02/15/1994 |
