A surgical instrument. The surgical instrument may comprise a transducer and an end effector. The transducer may be configured to provide vibrations along a longitudinal axis at a predetermined frequency and may comprise a piezoelectric stack positioned along the longitudinal axis. The transducer also may comprise a first metallic end mass positioned along the longitudinal axis adjacent a first end of the piezoelectric stack and a second metallic end mass positioned along the longitudinal axis adjacent a second end of the piezoelectric stack. The length of the transducer may be greater than or equal to of one wavelength and less than ½ of one wavelength. The end effector may be coupled to the transducer and may extend along the longitudinal axis. The length of the transducer and the end effector may be a multiple of ½ of one wavelength.

Ultrasonic surgical instruments

An ultrasonic clamp coagulator assembly that is configured to permit selective cutting, coagulation and clamping of tissue during surgical procedures. An elongated portion of the instrument can be configured for endoscopic applications and has an outside diameter of less than 6 mm. The construction includes a clamping mechanism, including a clamp arm pivotally mounted at the distal portion of the instrument, which is specifically configured to create a desired level of tissue clamping forces, exceeding 4 pounds when the trigger is fully closed. The clamping mechanism includes a force-limiting mechanism that effectively smooths out abusive tissue forces.

Actuation mechanism for use with an ultrasonic surgical instrument

The invention relates to a fuel-injection valve, in particular a high-pressure injection valve for directly injecting fuel into a combustion chamber of a compressed-mixture, spark-ignition internal combustion engine. Said valve is characterised in that an outlet opening (23) is provided downstream of the valve seat (20), the downstream end of said opening having a slit-forming element (30) that to a great extent closes the outlet opening (23). A slit-type flow outlet (35), through which a fuel spray can be discharged in a fan-type jet, is formed between the slit-forming element (30) and a front face (34) of the valve seat body (16).

Fuel-injection valve

In an internal combustion engine, a hydrocarbon feed valve (15) and an exhaust purification catalyst (13) are arranged in an engine exhaust passage. A first NO X removal method which injects hydrocarbons from the hydrocarbon feed valve (15) within a predetermined range of period so that the reducing intermediate generated thereby reduces the NO X contained in the exhaust gas and a second NO X removal method which makes the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst (13) a first target rich air-fuel ratio by a period which is longer than this predetermined range are used. When the NO X removal method is switched from the second NO X removal method to the first NO X removal method, the air-fuel ratio of the exhaust gas flowing into the exhaust purification catalyst (13) is made a second target air-fuel ratio which is smaller than the first target rich air-fuel ratio.

Exhaust purification system of internal combustion engine

An object of the invention is to provide an exhaust emission control device which eliminates the use of a heat-retention structure using heat-insulating material such as glass wool so as to attain substantial lessening in production cost. A discharge end of a gas gathering chamber is connected to an entry end of a mixing pipe so as to encase the entry end of the mixing pipe and close an opened end face in a required spaced-apart relationship. Moreover, a side surface of the entry end of the mixing pipe adjacent to the discharge side of the particulate filter is formed with an opening; and gas guide passages are formed in the gas gathering chamber by guide fins for tangential introduction of all of the exhaust gas from the discharge side of the particulate filter to the opening. An extra space isolated from the gas guide passages is ensured in the gas gathering chamber as a heat-retention chamber surrounding the entry end of the mixing pipe.

Exhaust emission control device

A pump for pumping a liquid, the pump comprising an inlet means (66), an outlet means (26), a pumping chamber (154) for receiving the liquid from the inlet means (66), and an actuator arrangement (70, 104, 126, 128) operable between a first position and a second position and arranged to pump the liquid from the pumping chamber (154) into the outlet means (26), wherein the inlet means (66) and the pumping chamber (154) are in fluid communication with a supply passage (112) when the actuator arrangement (70, 104, 126, 128) is in the first position, and the supply passage (112) extends into or around the actuator arrangement (70, 104, 126, 128) so as to allow transfer of heat from the actuator arrangement (70, 104, 126, 128) to the liquid.

Reducing agent dosing pump

A method of assembling a piezoelectric actuator arrangement (10) comprises the steps of providing a piezoelectric element (12) having first and second ends and arranging the piezoelectric element (12) within a sleeve member (20) such that the inner surface of the sleeve member (20) defines, together with the outer surface of the piezoelectric element (12), a chamber (24) for receiving a first filler material (30). The first filler material (30) is injected into the chamber (24) and a heating effect is applied to the sleeve member (20) such that the sleeve member (20) deforms to seal against the first filler material (30). The invention also relates to a piezoelectric actuator arrangement (10) arranged within a sleeve member (20), an inner surface of the sleeve member (20) and an outer surface of the piezoelectric element (12) together defining, at least in part, a chamber (24) containing a filler material (30) such that, when the actuator arrangement (10) is in use, a force due to fuel pressure within an injector accumulator volume is applied to the piezoelectric element (12) through the sleeve member (20) and the filler material (30).

Method of assembling an actuator arrangement

A mounting arrangement for attaching a pump arrangement (10, 110, 210) to an exhaust pipe (12, 112) at a boss (14, 114) is disclosed. The pump arrangement (10, 110, 210) comprises a delivery nozzle section (22, 122) and a remaining section including a pump body (20, 120), and the mounting arrangement comprises packing means (66, 152, 252) for supporting the pump body (20, 120) at the remaining section of the pump arrangement (10, 110, 210). The packing means provides thermal insulation and reduces noise during operation of the pump. A dosing device (110) for an exhaust system of an internal combustion engine is also disclosed. The dosing device comprises a pump (118) comprising a pump body (120); a delivery nozzle (122) for receiving fluid from the pump (118) and having an outlet end (130) from which fluid is expelled into the exhaust system upon operation of the pump (118); and a mounting arrangement (124, 126, 144) for mounting the pump (118) to an exhaust chamber of the exhaust system, in use. The mounting arrangement (124, 126, 144) comprises a heat shield (148) that surrounds at least an outlet end (130) of the nozzle (122) so as to define an air gap (150) between the heat shield (148) and the nozzle (122). The heat shield (148) is thermally decoupled from the nozzle (122) and the pump body (120), to guard against overheating of the reagent in the pump.

Fluid dosing device

A fuel injector comprises a first needle, and a second needle slidably within a passage formed in the first needle. The needles are engageable with respective seatings to control fuel delivery through respective groups of outlet openings. Load transmitting means are provided whereby movement of the first needle can be transmitted to the second needle. Also described is an injector in which a second needle is provided with formations defining an integral resilient biasing arrangement.

Fuel injector including outer valve needle and inner valve needle slidable within a passage provided in the outer valve needle

PROBLEM TO BE SOLVED: To provide a reservoir for a fluid dosing system. SOLUTION: The reservoir (28) for holding the fluid (21) for supply to a fluid dosing device (19) for introducing the fluid (21) into a gas flow (3), the reservoir comprising: an outer container (32); an inner container (30) located within the outer container (32), the inner container (30) being arranged to hold the fluid; an outlet (36) provided in the outer container, the outlet being in fluid communication with the inner container; wherein the inner container is flexible. COPYRIGHT: (C)2009,JPO&INPIT

Michael Peter Cooke

Papers

Reducing agent dosing pump

Method of assembling an actuator arrangement

Fluid dosing device

Fuel injector including outer valve needle and inner valve needle slidable within a passage provided in the outer valve needle

Reservoir for a fluid dosing system