Including Plural Separately Operable Master Actuators Or Master Units Driving A Common Slave Patents (Class 60/567)
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Patent number: 4300352Abstract: A hydraulic pressure integrator for averaging a plurality of independent input pressures comprising a base plate, a pivot plate mounted above the base plate for pivotal movement about a horizontal pivot axis disposed above and parallel to the base plate, a plurality of input cylinders mounted between the base plate and the pivot plate, each input cylinder having a slidable input piston mounted therein and adapted to contact the pivot plate along a given side of the pivot axis, and a single output cylinder mounted between the base plate and the pivot plate and having an output piston slidably mounted therein and adapted to contact the base plate on a side of the pivot axis opposite from the input pistons, each input cylinder receiving one of the independent input pressures.Type: GrantFiled: September 10, 1979Date of Patent: November 17, 1981Assignee: The Geolograph CompanyInventor: Henry L. Williams
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Patent number: 4248046Abstract: A vent accumulator for a hydraulic integrator of the type having at least three pistons arranged in end-to-end relationship within an elongated housing. Each piston is adapted to move under hydraulic pressure in a direction away from one longitudinal end of the housing towards the opposite longitudinal end. Each of the pistons, except for the last piston adjacent the opposite end of the housing, is provided with a piston rod operatively connected to the piston next adjacent towards one end of the housing. Each piston is defined as having a first side directed towards one end of the housing and a second side directed towards the opposite end of the housing. Each of the pistons, except for the last two pistons in line, is provided with means for receiving hydraulic fluid under pressure from a load cell on its first side and an air vent communicates on it second side.Type: GrantFiled: April 23, 1979Date of Patent: February 3, 1981Assignee: Unit Rig & Equipment Co.Inventor: Robert M. Fornell
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Patent number: 4244185Abstract: A master cylinder includes a master cylinder piston which is slidable by a booster with a hydraulic transmission interposed between the booster and the master cylinder piston. The booster includes two booster pistons the first of which has the same effective area as the master cylinder piston. With the system intact, the master cylinder piston is shifted as a result of the pressure fluid displaced by the two booster pistons to provide the hydraulic transmission. In the event of failure of the booster, the master cylinder piston is actuated directly by mechanical means through the first booster piston with the hydraulic transmission thereby being omitted.Type: GrantFiled: June 29, 1978Date of Patent: January 13, 1981Assignee: ITT Industries, Inc.Inventor: Juan Belart
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Patent number: 4241581Abstract: A synchronizer is provided for synchronizing the movements of two hydraulic actuators. The synchronizer consists of a two-piston pump which supplies hydraulic fluid to both actuators. The two pistons are mechanically connected so as to move simultaneously through equal distances, and on each complete stroke of the pump, each actuator receives fluid from both cylinders of the pump, so that both actuators receive precisely equal amounts of fluid.Type: GrantFiled: December 5, 1978Date of Patent: December 30, 1980Assignee: The Boeing CompanyInventor: Richard A. Chace
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Patent number: 4220007Abstract: A servo-assisted hydraulic master cylinder has a variable ratio effect so that brake fluid is initially displaced to the brakes at a high rate with respect to driver pedal movement and then at a low rate when an appropriate pressure has developed. A stepped piston assembly comprising a first piston slidable in a second piston defines a first chamber which is directly connected to the brakes and a second chamber in which a variable pressure is developed. The first piston is operated directly by the pedal through the servo valve and is subject only to brake pressure in the first chamber so that brake pressure is proportional to driver effort during normal operation. The second piston is operated by the servo diaphragm through the servo valve housing.Type: GrantFiled: February 2, 1979Date of Patent: September 2, 1980Assignee: Automotive Products LimitedInventor: Alastair J. Young
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Patent number: 4194437Abstract: A base structure defining a generally hemispherical seat and a generally spherically shaped body mounted in seating engagement with the seat. The base defines a pair of diametrically opposed guide channels each of which receives a portion of a different one of a pair of trunnions, another portion of each trunnion being received in a first circumferentially extending channel in the body. The body has a second circumferentially extending channel at right angles to the first circumferentially extending channel for sliding and rotating reception of a portion of each of a pair of second trunnions that have other portions each journaled in the base between respective ends of the guide channels and in diametrically opposed relationship.Type: GrantFiled: March 9, 1978Date of Patent: March 25, 1980Inventor: Mark E. Rosheim
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Patent number: 4172364Abstract: A servo-assisted hydraulic master cylinder has a variable ratio effect so that brake fluid is initially displaced to the brakes at a high rate with respect to driver pedal movement and then at a low rate when an appropriate pressure has developed. A stepped piston assembly comprising a first piston slidable in a second piston defines a first chamber which is directly connected to the brakes and a second chamber in which a variable pressure is developed. The first piston is operated directly by the pedal through the servo valve and is subject only to brake pressure in the first chamber so that brake pressure is proportional to driver effort during normal operation. The second piston is operated by the servo diaphragm through the servo valve housing.Type: GrantFiled: May 17, 1977Date of Patent: October 30, 1979Assignee: Automotive Products LimitedInventor: Alastair J. Young
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Patent number: 4170876Abstract: A drive system for use in a press in which a pneumatic cylinder and hydraulic pressure transformer are coupled together and connected by separate valves to respective gas and hydraulic sources. The valves are controlled by position transducers arranged along the path of movement of the output member of the transformer.Type: GrantFiled: June 9, 1977Date of Patent: October 16, 1979Inventors: Herbert R. Dits, Egon A. J. Bauer
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Patent number: 4134266Abstract: Apparatus for hydraulic control of friction brakes of an automobile vehicle which comprises a first master-cylinder directly connected to the hydraulic brake circuit and operated by the driver's brake pedal and a second master-cylinder operated by release of the gas pedal, and connected to the first master-cylinder in place of the reservoir thereof. The first master-cylinder is a tandem master-cylinder which comprises a first piston connected by the intermediary of a linkage to the brake pedal and a second piston dividing the interior of the first master-cylinder into first and second chambers. The first chamber is located between the two pistons and is connected to a first hydraulic brake control-circuit, while the second chamber is situated at an end of said cylinder and is connected to a second hydraulic brake control-circuit. The two chambers are supplied with liquid.Type: GrantFiled: April 26, 1977Date of Patent: January 16, 1979Assignee: Labavia S.G.E.Inventor: Jean-Claude Sertori
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Patent number: 4127360Abstract: Pumping apparatus which incorporates connected piston type positive displacement, slip free pumps is disclosed. They provide pumped outputs at a common displacement rate. They run out of phase to one another so that while one is pumping, the other is able to refill. A three way valve under control of a pressure responsive switch delivers pumped fluid to the down stream outlet when a pressure match is achieved. The apparatus finds application as a constant rate continuous fluid injection pump.Type: GrantFiled: December 16, 1976Date of Patent: November 28, 1978Inventor: Clarence W. Carpenter
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Patent number: 4099476Abstract: Apparatus for remotely controlling direction and speed of marine engines, including at least two operator controllers located remotely from each other in respective areas of the vessel, electric-hydraulic apparatus operably interposed between the two controllers and responsive to control signals transmitted from and corresponding to the direction and speed setting of one of the controllers for synchronously effecting corresponding setting of the other controller at all times.Type: GrantFiled: April 18, 1977Date of Patent: July 11, 1978Assignee: The Nippon Air Brake Co., Ltd.Inventors: Hiroo Inoue, Isao Kishimoto
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Patent number: 4089172Abstract: A device for infinitely controlling the position of a controlled member along its axis of movement. The device includes hydraulic actuators coaxially secured to the controlled member and a mechanically and/or manually actuated cylinder is fluidly connected to the hydraulic actuator so that by actuation of the cylinder, both the speed and the position of the controlled member along its axis of movement can be carefully controlled.Type: GrantFiled: October 13, 1976Date of Patent: May 16, 1978Inventor: David W. Junttila
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Patent number: 4088048Abstract: A method and a device for holing an oblong member, particularly a guard rail, substantially directly in front of a hole in a second member, particularly a pole, by utilizing a punching device comprising a punch and first and second pressure means with different ratios, of which the first means causes the punch to abut the oblong member, and the second means effects further movement of the punch to carry out holing in said member.Type: GrantFiled: November 1, 1976Date of Patent: May 9, 1978Assignee: Hans Olssons Mekaniska Verkstad ABInventor: Hans Olsson
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Patent number: 4074531Abstract: A load-controlling piston of the double-action type, dividing an associated cylinder into two compartments, is positionable by a hydraulic servomechanism comprising a block wherein a high-pressure supply port and a low-pressure discharge port communicate with a pair of pressure cylinders occupied by respective plungers which are hydrostatically linked with the piston through conduits connecting the compartments of the piston cylinder with respective pressure chambers of variable volume formed by the two pressure cylinders. Each plunger has an axial bore accommodating a valve stem with a tapering head which is surrounded with small clearance by a valve chamber communicating at one end with the discharge port and at the opposite end via an internal passage with a gap adjacent a plunger face remote from the corresponding pressure chamber.Type: GrantFiled: September 3, 1976Date of Patent: February 21, 1978Assignee: Lamborghini Oleodinamica S.p.A.Inventor: Corrado Menini
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Patent number: 4050251Abstract: The invention relates to a hydraulic servomotor comprising a housing provided with a bore slidably receiving two pistons separating an actuating chamber from an utilization chamber, said pistons including an annular outer piston and an inner piston received within the annular piston. Releasable coupling means are provided between both pistons to permit said pistons to move in unison when high pressure fluid is available in the actuating chamber and to permit the inner piston to be moved alone by the push rod in the event of a high pressure failure in the actuating chamber. The motion of the outer piston towards the interior of the actuating chamber is limited by an abutment fixed to the housing.Type: GrantFiled: January 26, 1976Date of Patent: September 27, 1977Assignee: Societe Anonyme D.B.A.Inventors: Jean-Jacques Carre, Roland Muterel
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Patent number: 4020931Abstract: A vehicle hydraulic braking installation includes a main master-cylinder 1 operated by the driver's brake pedal with or without servo-assistance and an additional master-cylinder 13 which is operated when the driver releases the accelerator pedal. The additional master-cylinder is connected to the braking circuit only through the main master-cylinder. As soon as the main master-cylinder begins to be operated, the main master-cylinder cuts off any communication between the additional master-cylinder and the braking circuit.Type: GrantFiled: February 4, 1975Date of Patent: May 3, 1977Assignee: Labavia-S.G.E.Inventor: Jean-Claude Sertori
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Patent number: 4011724Abstract: Actuator for selectively and sequentially providing dual pressure forces for positioning and seating fasteners and for other purposes. Air pressure is selectively applied to a first piston to apply a relatively low level of hydraulic pressure to the actuating rod and then to a second pneumatic piston to intensify the hydraulic pressure applied to the actuating rod. The actuator is caused to be extended a first distance at low force and then to be extended an additional distance at a relatively higher force. Air pressure is selectively applied to cause all pistons and the actuating rod to retract to their initial positions.Type: GrantFiled: September 16, 1971Date of Patent: March 15, 1977Assignee: Lockheed Aircraft CorporationInventors: Ralph K. Landes, William E. Thomas