Rolling Diaphragm Patents (Class 92/98D)
  • Patent number: 6068198
    Abstract: A generator/dispenser for mono-dispersed aerosol, with droplet size precisely controlled by a stepper motor and a nozzle array having a great number of operational micro-vias, and with fluid volume dosage control. A specified dose is delivered over an accurately controlled interval of time, by decrementing the volume of a fluid reservoir upon each of a specified number of control pulses to a stepper motor, which moves a ball screw linear actuator with great precision on each control pulse. The reservoir is closed at the aerosol delivery position by a nozzle array, which is a thin sheet with myriad micro-via holes. The micro-vias are of the same dimensions and orientation, producing for a medical inhaler the desired micro-droplet volume, for example the volume of a diameter droplet from each micro-via, for each pulse.
    Type: Grant
    Filed: March 23, 1999
    Date of Patent: May 30, 2000
    Inventor: Umesh Gupta
  • Patent number: 5941610
    Abstract: A tandem vacuum servo unit includes a movable power piston having a supporting portion and a front movable wall member having a first engaging portion for engaging the movable power piston. The first engaging portion has an input side face that engages the output side face of the supporting portion along a first contacting portion. A rear movable wall member has a second engaging portion whose input side face engages the output side face of the first engaging portion along a second contacting portion. The first contacting portion is spaced radially outwardly of the second contacting portion. This construction of the vacuum servo unit increases the durability of the front movable wall member.
    Type: Grant
    Filed: January 31, 1997
    Date of Patent: August 24, 1999
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Kenji Hayashi, Kazuhiko Suzuki, Satoshi Kawasumi, Yuzuru Sugiura
  • Patent number: 5918853
    Abstract: A vacuum valve includes a housing having an operating chamber, a plunger provided in the housing; and a self-lubricating rolling diaphragm provided between the plunger and the housing. The rolling diaphragm may have a tapered form. A vacuum valve further includes a valve rod connected to the plunger and penetrating the housing to connect with a valve body. A self-lubricating shaft seal comes into contact with the valve rod to provide an airtight seal between the housing and the valve rod.
    Type: Grant
    Filed: December 27, 1996
    Date of Patent: July 6, 1999
    Assignee: Seikisui Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yasuo Yamabe, Tetsushi Ohtsuka
  • Patent number: 5913665
    Abstract: A pump mechanism for a fill system of a packaging machine is set forth. The pump mechanism is utilized to pump a product that is dispensed by the fill system and includes a pump chamber for conducting the product therethrough. A further chamber is disposed proximate the pump chamber and a piston is disposed in the further chamber. The piston has at least one first opening in fluid communication with the further chamber and at least one second opening disposed at a head portion of the piston. The piston further includes at least one channel for providing fluid communication between the first and second openings. A first diaphragm is secured on the head portion of the piston and against the at least one second opening. As such, the first diaphragm is secured to the head portion using suction forces resulting from an underpressure communicated through the first opening to the at least one second opening via the at least one channel.
    Type: Grant
    Filed: March 28, 1997
    Date of Patent: June 22, 1999
    Assignee: Tetra Laval Holdings & Finance, SA
    Inventors: Paul C. Sundby, Kenneth M. Eno, Jonathan P. Buesing
  • Patent number: 5794509
    Abstract: An actuator system having a motor that drives a pneumatic spool valve to a known position based upon the number of step commands delivered to it. Valve ports or passages uncovered by the net position difference between the spool valve and a piston create gas flow to or from a control chamber. This gas flow causes a pressure differential across the face of the piston, inducing the piston to follow the spool valve. In this two-stage system, the piston acts as a force amplifier so that large forces and/or inertias may be actuated by positioning the motor. During steady state conditions, the piston achieves the same position as the spool valve is. Proportional control and very accurate positioning of the piston are provided without active position or position rate feedback control.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: August 18, 1998
    Assignee: Raytheon Company
    Inventors: Charles M. DeLair, Russell B. Cline
  • Patent number: 5771774
    Abstract: An air-operated diaphragm spring brake actuator has a pressure plate formed entirely of plastic. The diaphragm is secured to the pressure plate by ultrasonic welding. The pressure plate also has a central hub which centers the opening and receives the actuator rod in press-fit engagement.
    Type: Grant
    Filed: October 9, 1996
    Date of Patent: June 30, 1998
    Assignee: Nai Anchorlok, Inc.
    Inventor: Steven M. Stojic
  • Patent number: 5727447
    Abstract: A supercharge pressure control apparatus comprises a crimped member for securing an enclosure to a mounting member fixed in an internal combustion engine by crimping, a notch formed at one end portion of the crimped member for preventing the end portion from becoming cracked, a diaphragm disposed inside the enclosure for partitioning the interior of the enclosure into a first pressure room and a second pressure room, a holder disposed on the diaphragm and inside the second pressure room, a spring disposed inside the second pressure room for urging the diaphragm in the direction of the first pressure room or in the opposite direction through the holder, and a rod which is able to move backward and forward in accordance with the pressure of gas applied to the first pressure room for controlling the pressure of air to be supplied into the internal combustion engine.
    Type: Grant
    Filed: December 29, 1995
    Date of Patent: March 17, 1998
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Kazunari Shiraishi, Hidetoshi Okada, Sotsuo Miyoshi
  • Patent number: 5725365
    Abstract: A submersible pump cylinder (10; 110) for immersion in and displacement of a fluid (W), including a cylindrical housing (20; 120), a plunger assembly (45; 145) positioned for reciprocating motion within the cylindrical housing, a sealing sleeve assembly (85; 185) attached to the cylindrical housing and to the plunger assembly and overlapped to maintain a convolution (90; 190; 190') which moves during the reciprocating motion of said plunger assembly, and a balance valve (55) associated with the plunger assembly maintaining pressure within the flexible sleeve, whereby the flexible sleeve is maintained in engagement with the housing and the plunger assembly and substantially without frictional interengagement during motion of the plunger assembly.
    Type: Grant
    Filed: December 12, 1995
    Date of Patent: March 10, 1998
    Inventors: Fred D. Solomon, Charles S. Solomon, Dale F. Solomon
  • Patent number: 5716110
    Abstract: A housing of a brake booster 100 includes a pair of shells 1 and 5 and a ring 3 interposed therebetween which cooperatively define an interior space for accommodating a power piston 13. The interior space is divided into a front chamber 15 and a rear chamber 16 partitioned by the power piston 13. The power piston 13 has a diaphragm 2 interposed between the front chamber 15 and the rear chamber 16. The diaphragm 2 is shiftable in an axial direction thereof in response to pressure imbalance between the front chamber 15 and the rear chamber 16. A convolution chamber 2d is provided between an inner side of the housing and an outer peripheral edge of the diaphragm 2. The convolution chamber 2d is defined by a resilient annular member flattened in the axial direction and isolated from both the front chamber 15 and the rear chamber 16.
    Type: Grant
    Filed: January 23, 1996
    Date of Patent: February 10, 1998
    Assignees: Nippondenso Co., Ltd., Nippon Soken, Inc.
    Inventors: Kazuo Sunami, Kenji Takeda, Mitsuo Inagaki, Hiroyuki Shinkai
  • Patent number: 5673607
    Abstract: A rolling head diaphragm and dome-shaped piston configuration where the geometry of the diaphragm and piston, and the length of stroke, are modified to enable the commonly known rolling wall action of rolling wall diaphragms to be extended into the center section of the diaphragm up over the piston head when it is at the lower end of it's stroke, thus eliminating the right angle of the head/wall juncture of common pistons and the tight radius of the head/wall shoulder molded into other diaphragms, thereby extending the maximum available stroke and improving diaphragm reliability and longevity.
    Type: Grant
    Filed: October 19, 1995
    Date of Patent: October 7, 1997
    Assignee: Diacom Corporation
    Inventor: Charles G. Schwab
  • Patent number: 5560276
    Abstract: A pneumatic booster having a casing (16) formed from a cylinder (32) and a cover (34). The casing (16) is divided into two chambers (18,20) by a movable wall (10). The movable wall. (20) has a plate (12) and a flexible membrane (14). A bead (30) on the outer peripheral edge of flexible membrane (14) is fixed to the casing (16). The flexible membrane (14) forms a fold in a space located between the peripheral edge of the plate (12) and the casing (16). The plate (12) is secured to a hub structure which houses a valve member for operating the pneumatic booster. The plate (12) which is substantially parallel to the end cover has an extension (40) that extends in a forward direction substantially concentric to the cylinder (32). The extension (40) has front part (46) and a rear part (44) with a radial shoulder (42) on the front part.
    Type: Grant
    Filed: July 31, 1995
    Date of Patent: October 1, 1996
    Assignee: AlliedSignal Europe Services Techniques
    Inventor: Jean Pierre Gautier
  • Patent number: 5538478
    Abstract: A tensioner for a chain or toothed belt which includes an oil reservoir. Oil contained in the oil reservoir is hermetically sealed by a diaphragm fixed to the oil reservoir by a plug. A pressurizing means is mounted between the diaphragm and the plug. The pressurizing means includes a compression spring and a bowl-shaped spring seat. A diaphragm is urged by the pressurizing means. A detent portion, extending upwardly from the diaphragm, is integrally formed on the surface of the diaphragm facing the atmosphere. The spring seat includes a recess at the central portion of the spring seat so that the detent portion of the diaphragm is engaged with the recess preventing free movement between the diaphragm and the pressurizing means.
    Type: Grant
    Filed: March 21, 1995
    Date of Patent: July 23, 1996
    Assignee: Tsubakimoto Chain Co.
    Inventors: Katsuya Nakakubo, Hiroyuki Miyake
  • Patent number: 5524526
    Abstract: A vacuum motor 10 for an automotive vehicle comprises a generally cylindrical housing 12 having an end wall 14 with the depression 16 therein and a diaphragm 22 axially reciprocating within the housing. The diaphragm includes an annular ridge 38 having a predetermined diameter which provides an interference fit for a spring 40 contained within the housing. The interference fit of the spring within the housing reduces the vibration of the spring and the objectionable noise produced by the vacuum motor.
    Type: Grant
    Filed: October 28, 1994
    Date of Patent: June 11, 1996
    Assignee: Ford Motor Company
    Inventor: Niranjan G. Humbad
  • Patent number: 5477682
    Abstract: A hydraulic master cylinder and reservoir assembly having a master cylinder body with a fluid reservoir, and a master cylinder bore with a piston assembly sealingly reciprocal within the bore. The fluid reservoir has at least a portion thereof concentric with the master cylinder bore and is sealed from the atmosphere by a rolling diaphragm, which is sealingly slidable relative to an internal surface of the reservoir allowing the volume of fluid within the reservoir to expand or contract.
    Type: Grant
    Filed: July 25, 1994
    Date of Patent: December 26, 1995
    Assignee: Automotive Products France, SA
    Inventor: Andre Tobiasz
  • Patent number: 5363743
    Abstract: A fluid pressure operated servomotor having a housing shell containing a flexible diaphragm forming a fluid pressure chamber with a port through the housing connectable for receiving a fluid pressure signal. The diaphragm has a rigid insert extending therethrough and sealed thereabout with a cup shape on the interior of the chamber and having a rod pivot surface formed on the exterior side of the diaphragm. A spring inside the chamber has one end registered in the cupped shape to bias the diaphragm insert in one direction. In one embodiment, the insert is shaped to have a rod pivot surface nested in the coils spring such that the rod pivot load resists lateral buckling of the spring; and, in another embodiment, a shroud is formed on the insert about the rod pivot surface for limiting rotation of the insert with respect to the rod end.
    Type: Grant
    Filed: April 14, 1993
    Date of Patent: November 15, 1994
    Assignee: Eaton Corporation
    Inventors: Claus D. Raddatz, Ronald J. Wojtecki, Norman E. Zerndt
  • Patent number: 5355770
    Abstract: The invention relates to a brake-booster comprising a casing (10) within which is found a piston structure which, with the help of an unrolling membrane (12), defines a front chamber (16) permanently connected to a partial vacuum source by a valve (17) and a back chamber (16) selectively connected to the front chamber (16) or to the atmosphere via a valve means (34) when a control rod (30) is actuated, and a device (36) for fastening the booster on a wall (38) adjacent to a first face of the casing (10). According to the invention, apertures (50, 60) are made in the piston structure (14) and in a second face of the casing (10) and are aligned in the axial direction of the booster so as to permit the actuation of the fastening device (36) through the aperture (60) made in the second face of the casing (10).
    Type: Grant
    Filed: May 4, 1993
    Date of Patent: October 18, 1994
    Assignee: AlliedSignal Europe Services Techniques
    Inventors: Jean Pierre Gautier, Ulysse Verbo, Miguel Perez Revilla, Guy Meynier, Philippe Castel
  • Patent number: 5332370
    Abstract: A miniature diaphragm pump comprises a motor having an output shaft rotating about its axis, an eccentric pin fixed in eccentric relation to the axis of the output shaft, a drive member connected to the eccentric pin to be driven thereby to reciprocate in a direction perpendicular to the axis of the output shaft, at least one pump chamber disposed radially outwardly of the drive element with respect to the axis of the output shaft and having inlet and outlet valves. Each pump chamber has one diaphragm surface with a rigid joint rod and is connected with the drive member through the joint rod. The reciprocating motion of the drive member is transmitted to each pump chamber such that one pumping action including a compression step and an inflation step is provided to the respective pump chamber during one revolution of the eccentric pin about the output shaft.
    Type: Grant
    Filed: April 21, 1993
    Date of Patent: July 26, 1994
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Satoshi Nakayama, Yoshie Watari, Mitsuo Nakatani, Makoto Fujiwara
  • Patent number: 5316273
    Abstract: A counterbalance actuator is disclosed for reducing the energy required in weight lifting operations. The counterbalance actuator includes a piston and a flexible bellows attached to the piston. A bellows extension is attached to the top of the bellows with a gas impervious seal. The bellows extension permits the counterbalance actuator to achieve an extended stroke while allowing the counterbalance actuator to be collapsed to a reduced size.
    Type: Grant
    Filed: February 22, 1993
    Date of Patent: May 31, 1994
    Assignee: Litton Industrial Automation Systems, Inc.
    Inventor: John L. Vaphiadis
  • Patent number: 5293811
    Abstract: A control fin actuator (28) for a guided missile (20) includes a pressure actuator (40) having a slidable piston (44) inside a housing (42). Rolling diaphragm seals (50, 56) of the top piston face (46) and the bottom piston face (48) to the inside wall of the housing (42) divide the interior of the housing (42) into at least two chambers (54, 58). The rolling diaphragm seals (50, 56) eliminate sliding friction as the piston (44) moves within the housing. The two chambers (54, 58) are controllably pressurized to slide the piston (44) within the housing (42), thereby moving a push rod (78) attached to the piston (44) and extending out of the housing (42). The push rod (78) is connected to a missile control fin output shaft (24) by a taut band connector (80) that avoids backlash. A magnet (86) may be positioned adjacent to the push rod (78) to induce eddy currents in the push rod (78), thereby providing a damping force that increases with increasing rate of movement.
    Type: Grant
    Filed: August 2, 1991
    Date of Patent: March 15, 1994
    Assignee: Hughes Aircraft Company
    Inventors: Charles M. DeLair, Russell B. Cline
  • Patent number: 5275014
    Abstract: A heat pump system (10, 210) includes a power section (11, 211) having a generator (15, 215) for converting a first working fluid from a liquid to a relatively high pressure gas, a power unit (25, 222) providing energy by the conversion of the relatively high pressure gas to relatively low pressure gas to power a drive piston (27, 228') for intermittently delivering a power stroke, a power section condenser (51, 251) converting the first working fluid from relatively low pressure gas to the liquid, a compressor section (12, 212) intermittently driven by the drive piston, the compressor section having a compressor (75, 275) converting relatively low pressure gas second working fluid to relatively high pressure gas second working fluid for circulating the second working fluid through a compressor section condenser (108, 308) and a compressor section evaporator (115, 315) to effect heating and cooling operations.
    Type: Grant
    Filed: July 13, 1992
    Date of Patent: January 4, 1994
    Inventor: Fred D. Solomon
  • Patent number: 5257682
    Abstract: A hub clutch assembly for a vehicle which comprises a drive axle, a wheel, and a housing of a closed structure. The wheel is fixedly mounted on the housing. A clutch is movable between a connecting position where the housing and the drive axle are connected to each other, and a disconnecting position where the housing and the drive axle are disconnected from each other. An actuator is supplied with pressure to move the clutch to either the connecting position or the disconnecting position. A biasing element is provided for biasing the clutch both to the connecting and disconnecting positions. A closed chamber is defined between the housing and the actuator. A valve is provided for allowing the pressure to escape from the closed chamber to the actuator when the actuator is inoperative and for cutting off movement of the pressure when the actuator is operative.
    Type: Grant
    Filed: April 16, 1992
    Date of Patent: November 2, 1993
    Assignee: Tochigifujisangyo Kabushiki Kaisha
    Inventor: Tadashi Kuroki
  • Patent number: 5255711
    Abstract: A chamber (24) is filled with a fluid whose pressure is to be regulated to a predetermined value. A valve (30) is disposed between the chamber (24) and a high pressure source of the fluid. A rolling diaphragm (18) has a face (18c) exposed to the fluid in the chamber (24), and actuates the valve (30) to connect the chamber (24) to the source when the chamber pressure drops below the predetermined value and to disconnect the chamber (24) from the source when the chamber pressure rises to substantially the predetermined value. A spring (26) urges the diaphragm (18) against the chamber pressure with a force corresponding to the predetermined pressure value.
    Type: Grant
    Filed: August 28, 1992
    Date of Patent: October 26, 1993
    Assignee: Hughes Aircraft Company
    Inventor: John W. Reeds
  • Patent number: 5207142
    Abstract: A diaphragm for a brake booster having an annular inner bead with first and second radial surfaces separated by an apex. The second radial surface has a plurality of indentations that extend from the apex. In response to a positive pressure differential created by vacuum in a first chamber and air in a second chamber, an output force is developed to effect a brake application corresponding to an input force. This positive pressure differential act on the annular bead to urge said first radial face into engagement with a wall to prevent communication between the first and second chambers during a brake application. In the absence of the presence of vacuum in the first chamber, the input force acts on the wall to develop an operational pressure in the first chamber to develop a negative pressure differential between the first and second chambers.
    Type: Grant
    Filed: July 23, 1992
    Date of Patent: May 4, 1993
    Assignee: Allied Signal Inc.
    Inventor: Wayne A. Hewitt
  • Patent number: 5205133
    Abstract: A high efficiency pool heating system (10) includes a power circuit (12) and heat pump circuit (14). Each circuit having a working fluid flowing therein. In the power circuit, a heater (16) vaporizes the working fluid which is periodically delivered and exhausted through a valve section (32) to a driving section (28) of a power unit (26). The driving section drives a driven section (30) which operates as a compressor for the working fluid in the heat pump circuit. Fluid exhausted from the driven section of the power unit is passed to a first portion (48) of a heat exchanger (46) which is in fluid communication with the water of a pool. In the heat exchanger, the working fluid in the power circuit is condensed to a liquid. Thereafter, the liquid is passed through the power circuit back to the heater where it is again vaporized.
    Type: Grant
    Filed: January 16, 1992
    Date of Patent: April 27, 1993
    Assignee: R & D Technologies, Inc.
    Inventor: David Lackstrom
  • Patent number: 5184468
    Abstract: A vacuum brake power booster is presented in which the vacuum control valve (81) is arranged parallel to the master cylinder (55). The housing (92) of the booster is used as a carrier element for actuating members, such as the brake pedal (60, 8) and the clutch pedal (11) as well as for other elements. A twin master cylinder is employed. A short overall axial length and a space-saving design of the assembly as a whole, enabling efficient incorporation of the overall assembly at the assembly line of the vehicle manufacturer, are achieved by the selection and arrangement of the components of the brake power booster and of the master cylinder, as well as of the actuating members.
    Type: Grant
    Filed: November 13, 1990
    Date of Patent: February 9, 1993
    Inventors: Juergen Schonlau, Alfred Birkenbach, Ralf Harth
  • Patent number: 5163355
    Abstract: According to the present invention, a rotation preventive portion for preventing the rotation of bead portion, such as a stepped projection, is provided on the bead portion of diaphragm, which is squeezed between a front shell and a rear shell. When the front shell and the rear shell are assembled with such a diaphragm, the rotation of the bead portion is prevented by this rotation preventive portion (stepped bead). As the result, outer lip of the bead portion of diaphragm or the rolling portion of diaphragm are not squeezed between the front shell and the rear shell, and the front shell and the rear shell can be assembled without damaging or breaking the diaphragm.
    Type: Grant
    Filed: January 11, 1991
    Date of Patent: November 17, 1992
    Assignee: Jidosha Kiki Co., Ltd.
    Inventor: Shintaro Uyama
  • Patent number: 5155997
    Abstract: A fluid transmission linear actuator having a chamber with a cylindrical boundary and a central axis. An output plunger has a head in the boundary. A neck is formed on the chamber with a passage entering it. An input plunger is axially movable in the neck. The input plunger and the ouput plunger are coaxial. A transmission capsule has a continuous skin forming a first reentrant fold between the output plunger and the boundary, and a second reentrant fold between the neck and the input plunger. A substantially incompressible fluid fills the capsule so that movement of either plunger results in proportional movement of the other plunger. This input plunger can be formed with an exponential surface so that its movement can result in a non-linear response, or in some circumstances can provide a linear output in response to a non-linear input.
    Type: Grant
    Filed: November 15, 1990
    Date of Patent: October 20, 1992
    Inventor: Kevin D. McGushion
  • Patent number: 5138936
    Abstract: A rolling piston comprises a substantially cylindrical piston slidably supported within a chamber. One end of the chamber is sealed by a first sealing cap including a circular base portion having a fluid inlet therethrough and opposite ends of a substantially tubular flexible diaphragm are sealingly anchored around a first end of the piston and around an inside periphery of the first sealing cap, respectively. The diaphragm comprises a cylindrical thin-walled outer sleeve having high axial tensile strength and a cylindrical, thin-walled inner sleeve inside the outer sleeve and contiguous therewith having high elasticity both longitudinally and radially.
    Type: Grant
    Filed: December 28, 1990
    Date of Patent: August 18, 1992
    Inventor: Elie Kent
  • Patent number: 5133187
    Abstract: A fluid circuit assembly for maintaining substantially constant pressure between two abutting solid objects, the circuit assembly comprising a master cylinder assembly, a plurality of working cylinder assemblies, piston rods extending from the working cylinder assemblies, a spool on distal ends of the piston rods adapted to engage a surface against which it is desired to maintain constant pressure, the master cylinder and the working cylinders having first chambers in communication with a first fluid circuit, the master cylinder having a second chamber in communication with a source of gas under a selected substantially constant pressure, said gas being in communication with a gas reservoir portion of a liquid/gas tank, a liquid reservoir portion of said tank being in communication with second chambers of said working cylinder assemblies, such that upon change of pressure on the spool by the surface, a reaction is generated in the circuit assembly, such as to move the spool to restore a selected pressure betw
    Type: Grant
    Filed: December 14, 1990
    Date of Patent: July 28, 1992
    Assignee: SW Industries, Inc.
    Inventors: James J. Beaudreault, James O. Gallant
  • Patent number: 5090298
    Abstract: The invention relates to a brake booster comprising a casing (10) and a flexible diaphragm (12) which sealingly divides the interior of the casing into a front chamber (16) and a rear chamber (18). According to the invention, it possesses at least one passage which extends sealingly through it from one face of the casing to the opposite face. The invention is utilized for the braking of motor vehicles.
    Type: Grant
    Filed: February 24, 1989
    Date of Patent: February 25, 1992
    Assignee: Bendix France
    Inventors: Jean-Pierre Gautier, Miguel Perez
  • Patent number: 5090299
    Abstract: A piston unit is disclosed which includes a pressure-compensating device wherein pressure variations in a product line are dampened by subjecting a side of the piston (6) remote from the product line (5) to a variable air pressure. Rolling membranes (7,8) are positioned on both sides of the piston and enclose between them a chamber (13) which is connected to a source of vacuum (14) so as to secure contact of the membranes with the piston. The vacuum is distributed in the chamber (13) with the help of a vacuum line (15) with enlarged outlet area, and is distributed over the end faces of the piston (6) by way of a network of ducts (19,20) in the piston.
    Type: Grant
    Filed: June 13, 1990
    Date of Patent: February 25, 1992
    Assignee: Tetra Dev-Co
    Inventors: Franco Santi, Giorgio Bordini
  • Patent number: 5067392
    Abstract: The pneumatic booster of the vacuum type comprises mainly a housing (12) divided into two chambers (7, 8) by a movable wall structure (6), constructed of a substantially radial plate (9) and a flexible diaphragm (10) secured by its outer peripheral edge to the housing (12), and forming a flange (11) in the space between the plate (9) and the housing (12). The plate is centrally integral with a hub structure housing, a distribution valve device and linked to a control member and to a controlled member, each by a swivel connection. The plate (9) has at its outer edge an extension (13) cooperating in a non-leaktight manner with the internal wall of the housing (12) in order to ensure axial guidance of the movable wall (6) inside the housing (12).
    Type: Grant
    Filed: August 16, 1990
    Date of Patent: November 26, 1991
    Assignee: Bendix Europe Services Techniques
    Inventor: Jean-Pierre Gautier
  • Patent number: 5062348
    Abstract: A seal unit is provided for a brake booster such as of a tandem type which includes a center plate within its shell. The brake booster includes annular means disposed within the shell for maintaining a hermetic seal between the center plate and a valve body. An axial portion of the center plate is formed with an axially extending cylindrical portion, the end of which is folded radially inward to define a U-shaped fold. The annular seal means is fitted inside the cylindrical portion, with its part disposed between the inner peripheral surface of the cylindrical portion and the outer peripheral surface of the fold. This effectively prevents the annular seal means from being withdrawn from the center plate.
    Type: Grant
    Filed: August 15, 1990
    Date of Patent: November 5, 1991
    Assignee: Jidosha Kiki Co., Ltd.
    Inventors: Hiroya Gotoh, Kazuo Kobayashi
  • Patent number: 5048648
    Abstract: The present invention relates to a piston cap for a disc brake, comprising a brake motor consisting of a piston (24) sliding in a cylinder (26), this cap being composed of a flexible material ensuring sealing between the piston (24) and the cylinder (26) by way of a bead (32) located on its inner periphery and coming to rest in an annular groove (34) made in the head of the piston (2) and of a retention part on its outer periphery, capable of coming in contact with the inner wall of a receptacle formed at the end of the cylinder, this retention part comprising a metal insert (36) in the form of a cylindrical ring. According to the invention, the cap possesses at least one vent allowing the air contained in the volume which it delimits with the piston (24) and the cylinder (26) to escape and preventing the entry of foreign bodies or corrosive agents into this volume.
    Type: Grant
    Filed: January 11, 1991
    Date of Patent: September 17, 1991
    Assignee: Bendix France
    Inventor: Gerard Le Deit
  • Patent number: 5029813
    Abstract: A sliding stem valve for controlling fluid flow in a valve body having a seat, a bonnet, a valve stem and plug slidably mounted in the bonnet for engaging the seat during valve shut-off, and a diaphragm forming a stem seal for preventing the undesired leakage of fluid into the atmosphere. The diaphragm is formed of elastomeric material with bead edges at opposite ends. The top diaphragm bead edge is sealed with a retainer to the bonnet. The bottom diaphragm bead seal is sealed to the valve stem while enabling the valve stem to rotate with respect to the bottom diaphragm bead edge. A sized retainer, bushing and retainer ring mount the bottom diaphragm bead edge to the valve stem and permit slidable motion of the bead edge with the valve stem while enabling the valve stem to rotate with respect to the bead edge and still maintain a viable diaphragm seal.
    Type: Grant
    Filed: August 6, 1990
    Date of Patent: July 9, 1991
    Assignee: Fisher Controls International, Inc.
    Inventors: Herbert H. Walton, Randy J. Hall
  • Patent number: 5027693
    Abstract: The combination diaphragm and valve body comprises a plastic vacuum booster valve body (32) which has molded integrally therewith via living hinges (34) a plurality of diaphragm arms (36). The diaphragm arms (36) may be disposed initially in a position substantially parallel to a longitudinal axis (A) of said valve body (32). The diaphragm arms (36) are pivoted to a position substantially orthogonal relative to the longitudinal axis (A) of the valve body (32) and ultrasonically welded to the valve body (32). Each of said diaphragm arms (36) includes a plurality of radial openings (38) at a radial end (39) thereof for receiving a metal connection member (40). The metal connection member (40) is snap-fitted into associated radial openings (38) in the diaphragm arms (36), and a diaphragm (50) is compression molded about the valve body (32) and over the surface of the diaphragm arms (36). The diaphragm arms (36) may be manufactured separately and then welded to the valve body (32).
    Type: Grant
    Filed: November 24, 1989
    Date of Patent: July 2, 1991
    Assignee: Allied-Signal Inc.
    Inventor: Dennis W. Wilkinson
  • Patent number: 5025709
    Abstract: In a tandem type vacuum booster, the booster comprises a first and a second flange, and the second flange is formed with a first stop projection and a second stop projection, the first stop projection being adapted to abut against a predetermined one of the locking claw to stop the flanges at the assembled position before the locking claws interfere with a positioning means during rotation of the flanges to the assembled position, and the second stop projection permitting passing thereover of a locking claw other than the predetermined locking claw during rotation of the flanges toward the assembled position, but coming into abutment against such other locking claw to resist the rotation of the flanges back to the disassembled position when the flanges have reached the assembled position.
    Type: Grant
    Filed: May 24, 1990
    Date of Patent: June 25, 1991
    Assignee: Nissin Kogyo Kabushiki Kaisha
    Inventor: Yoshihisa Miyazaki
  • Patent number: 5007329
    Abstract: Working pistons, in particular those of brake boosters, have to tolerate a considerable number of changes in stress and great forces acting on the piston. Simultaneously, it is an object to construct the pistons as light-weight as possible. Due to the considerable forces in the axial direction, it is imperative for the piston to be well secured on the guiding axis. On the other hand, the central guide's projection securing the piston in the axial direction can cause local stresses on the piston and, thus, fatigue in the material which implies a premature failure of the piston. It is an object of this invention to improve the central circumference of the piston no longer is rigidly clamped into the central guide, but rather in that the inner end and the support are designed so as to enable a swivelling motion of the piston plate without local bending stress, thereby the life of the piston being considerably prolonged.
    Type: Grant
    Filed: April 11, 1989
    Date of Patent: April 16, 1991
    Assignee: Alfred Teves GmbH
    Inventor: Bernd Toepperwien
  • Patent number: 4987920
    Abstract: A pilot operated, diaphragm actuated fluid valve assembly having an annular main valve seat with a tapered annular surface disposed therearound. A movable diaphragm has a generally flat central main valving surface thereon and an integrally formed annular wiper extending outwardly therefrom. The annular wiper contacts the tapered annular surface a relatively small distance before the main valving surface contacts the main valve seat.
    Type: Grant
    Filed: April 25, 1990
    Date of Patent: January 29, 1991
    Assignee: Eaton Corporation
    Inventor: Richard A. Donner
  • Patent number: 4988082
    Abstract: A two-part, spliced air sleeve assembly for use with an air spring damper includes a first corded, resilient sleeve member bonded to a second corded, resilient sleeve member. The bond angles and fabrics of the first sleeve members are selected so that the first sleeve inflates to a smaller diameter than the second sleeve. A first fastener secures the first sleeve member to the second portion of a damper. A second fastener secures the upper sleeve to a piston rod of the damper to form a closed chamber for receiving pressurized fluid. When inflated for operation, the first sleeve has a smaller diameter than the second sleeve.
    Type: Grant
    Filed: July 18, 1989
    Date of Patent: January 29, 1991
    Assignee: General Motors Corporation
    Inventor: James M. Pees
  • Patent number: 4986164
    Abstract: A pneumatic gun having an improved firing valve is disclosed wherein the firing valve is sealingly secured to the housing of the gun by a pair of rolling diaphragm seals. On the underside of the firing valve, there is a deflector having a downwardly curled outer edge operative to direct air flow into the top of the cylinder upon opening of the firing valve. The firing valve is so configured that exposure of multiple differential areas of the valve to a common high pressure results in the valve being biased toward a sealed position relative to the cylinder of the gun while in the unfired position.
    Type: Grant
    Filed: June 13, 1989
    Date of Patent: January 22, 1991
    Assignee: Senco Products, Inc.
    Inventor: John P. Crutcher
  • Patent number: 4984507
    Abstract: A brake booster of triple type comprises a shell in which constant pressure and variable pressure chambers are formed. According to the invention, individual variable pressure chambers defined within the shell communicate with a valve mechanism through respective variable pressure passages having a minimum channel length. In this manner, hydraulic fluid contained within the respective variable pressure chambers which communicate with the associated variable pressure passages can be rapidly displaced through the valve mechanism, thus preventing an operational lag in terminating the brake action in a favorable manner.
    Type: Grant
    Filed: July 17, 1989
    Date of Patent: January 15, 1991
    Assignee: Jidosha Kiki Co., Ltd.
    Inventors: Haruo Suzuki, Tohru Satoh
  • Patent number: 4938271
    Abstract: A dosing apparatus for packaging containers comprises a dosing device including a housing, a wall within the housing and reciprocable to draw in and expel a substance through an inlet and an outlet, respectively, of the housing, a rotary stepping motor which drives the wall, and a screw device which converts rotary motion of the motor to linear motion of the wall; and a control programmable to control the speed and stroke angle of the motor. The filled containers may be weighed in turn and the weight data used automatically to make any necessary corrections to the wall stroke.
    Type: Grant
    Filed: February 19, 1988
    Date of Patent: July 3, 1990
    Assignee: Elopak Systems AG
    Inventors: Kevin R. Bunce, William Russell
  • Patent number: 4930555
    Abstract: A microgravity dispenser system including a carbonator, metering device and cup filler for dispensing a still or carbonated beverage in the microgravity conditions of outer space.
    Type: Grant
    Filed: March 23, 1989
    Date of Patent: June 5, 1990
    Assignee: The Coca-Cola Company
    Inventor: Arthur G. Rudick
  • Patent number: 4915018
    Abstract: A diaphragm piston assembly in which an annular ring member is provided, preferably at the outer clamping periphery of the diaphragm between the underside of the diaphragm and body, to exert a force on the diaphragm in the direction of the cover that clamps the diaphragm to the body, thereby encouraging the diaphragm convolution to assume a disposition in a preferred direction corresponding to the direction in which the convolution is predisposed by the inherent "spring effect" of the diaphragm.
    Type: Grant
    Filed: September 13, 1988
    Date of Patent: April 10, 1990
    Assignee: American Standard Inc.
    Inventors: Daniel G. Scott, Theodore B. Hill
  • Patent number: 4905573
    Abstract: A tandem-type vacuum booster having a partition plate providing front and rear chambers with a booster piston and diaphragm in each chamber. A piston boss is slidably supported on the partition plate and a connecting cylinder is formed on the front chamber booster piston. A press plate is provided on the piston boss and the rear booster piston and an end plate of the connecting cylinder are coupled to the piston boss by the press plate and a plurality of bolts disposed around the piston boss with the rear booster piston and diaphragm clamped between the press plate and piston boss. The front ends of the bolts are disposed to come closer to the piston boss axis than the rear ends. The bolt heads are also received in recesses provided in the press plate to prevent relative rotation between the bolts and press plate.
    Type: Grant
    Filed: November 3, 1988
    Date of Patent: March 6, 1990
    Assignees: Nissin Kogyo Kabushiki Kaisha, Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Yoshihisa Miyazaki, Tsuyoshi Hatada, Kazuo Miyazaki, Takahiro Hachigo
  • Patent number: 4887516
    Abstract: A diaphragm clamping arrangement for assembly of a diaphragm-type piston in the body of a valve device or the like such that the diaphragm is biased in a direction to cause the diaphragm convolution to assume a preferred disposition in which a desired diaphragm "spring effect" is maintained.
    Type: Grant
    Filed: September 13, 1988
    Date of Patent: December 19, 1989
    Assignee: American Standard Inc.
    Inventors: Daniel G. Scott, Theodore B. Hill
  • Patent number: 4885982
    Abstract: A vacuum-type brake booster device for automotive use having a shape such that the mounting of the booster device and surrounding components inside the engine compartment of the vehicle is markedly eased. The shell of the booster device, and hence the diaphragm contained therein, has the shape in the plane of the diaphragm of a circle having a peripheral segment thereof removed. This causes the effective center of the diaphragm to be shifted from the center of the circle. The input and output shafts and the master cylinder are mounted on the shell aligned with the offset effective center of the diaphragm.
    Type: Grant
    Filed: June 15, 1984
    Date of Patent: December 12, 1989
    Assignee: Jidosha Kiki Co., Ltd.
    Inventor: Morihiko Shimamura
  • Patent number: 4844112
    Abstract: An electromagnetically actuated, pilot operated valve having a nonmetallic body with a pressure responsive diaphragm for opening the main valve and defining, in cooperation with a guide member, a pilot chamber having an armature/pilot valve member movably received thereon. The guide member has a bleed-supply hole formed therein and is secured to the body by an annular member attached to the body by nonmetallic weldment and integrally defining a cup into which a solenoid coil is received over the guide member and potted by liquid-cast insulating material. An armature guide member-diaphragm subassembly has the guide with armature received therein with the diaphragm peripherally secured thereto by a ring pressed thereover, the ring interfitting with cooperating body surfaces to define restricted passage to filter flow to the pilot chamber bleed hole.
    Type: Grant
    Filed: September 30, 1988
    Date of Patent: July 4, 1989
    Assignee: Eaton Corporation
    Inventors: James M. Pick, Wesley S. Swanson, Edward D. Hurst
  • Patent number: 4841843
    Abstract: A device for converting energy of a fluid medium into mechanical work comprises a hermetically sealed chamber (1) communicated through valves with systems for supply and discharge of a fluid medium. The chamber has an opening (4) in which a sleeve (5) of flexible material is secured through one end along the perimeter, the sleeve being mounted in the chamber (1) with a possibility of reciprocation relative to the secured end so that during the motion from the initial position to the extreme position a part of the sleeve (5) is turned inside out forming a space (9) communicating with the chamber (1). The sleeve (5) through its other end is connected to a drum (7) disposed in the chamber (1) and mounted on a shaft (6) coupled to a reverser (11) through an overrunning clutch (8). In the initial position the sleeve (5) is wound on the drum (7).
    Type: Grant
    Filed: July 27, 1987
    Date of Patent: June 27, 1989
    Inventors: Viktor V. Shishkin, Nikolai F. Kryazhevskikh, Jury P. Shapovalov