A low-force, non-displacement, micro/miniature valve and/or pump assembly is provided. A tube component having a first side port coupled to an inlet portion and a second side port coupled to an outlet portion can be selectively moved to alternatively couple the side ports to a first or second piston pump chamber. First and second pistons can be actuated after positioning the tube component to either draw in fluid or push out fluid from either the first or second piston pump chambers during each actuation of the pistons. The fluid can be drawn in from a reservoir and can be expelled to a patient for providing a dose of the fluid to the patient.

A low-force, non-displacement, micro/miniature valve and/or pump assembly is provided. A tube component having a first side port coupled to an inlet portion and a second side port coupled to an outlet portion can be selectively moved to alternatively couple the side ports to a first or second piston pump chamber. First and second pistons can be actuated after positioning the tube component to either draw in fluid or push out fluid from either the first or second piston pump chambers during each actuation of the pistons. The fluid can be drawn in from a reservoir and can be expelled to a patient for providing a dose of the fluid to the patient.

A linear compressor includes a spring axially elastically supporting a driving assembly. The spring includes a spring body axially extending, a front spring link forming an end of the spring body by extending from a side of the spring body, and a rear spring link forming the other end of the spring body by extending from the other side of the spring body. Any one of the front spring link and the rear spring link is fixed to the driving assembly and the other one is fixed to a supporting assembly.

A linear compressor includes a spring axially elastically supporting a driving assembly. The spring includes a spring body axially extending, a front spring link forming an end of the spring body by extending from a side of the spring body, and a rear spring link forming the other end of the spring body by extending from the other side of the spring body. Any one of the front spring link and the rear spring link is fixed to the driving assembly and the other one is fixed to a supporting assembly.

A peristaltic pump includes a rotor and first and second rollers mounted on the rotor. The first and second rollers rotate between a disengaged, initially engaged and a fully engaged position with respect to a section of tubing. The rollers begin to occlude the tubing when in the initially engaged positon and fully occlude the tubing when in the fully engaged position. The pump also includes an encoder and a rotor controller. The encoder monitors the position of the first and second rollers as the rotor rotates. The rotor controller is in electrical communication with the encoder and controls the operation of the pump and rotor. The controller stops the rotation of the rotor in response to a stop command and based upon the monitored position of the first and second rollers such that either the first or second roller remains in the fully engaged positon.

A vibrator(56A), including: a bar(16), a first location(64A) therealong including a first pivotal connection(20A) to the chassis(62) of the vibrator; a weight(14) including a second pivotal connection(20B) to a second location(64B) of the bar(16); and a motor(12), for rotating(70) the weight(14) about the second pivotal connection(20B), thereby converting the weight rotation(70) to back and forth linear motion(54), thereby the back and forth linear motion(54) is characterized by the distance between the first(64A) and second(64B) locations.

A vibrator(56A), including: a bar(16), a first location(64A) therealong including a first pivotal connection(20A) to the chassis(62) of the vibrator; a weight(14) including a second pivotal connection(20B) to a second location(64B) of the bar(16); and a motor(12), for rotating(70) the weight(14) about the second pivotal connection(20B), thereby converting the weight rotation(70) to back and forth linear motion(54), thereby the back and forth linear motion(54) is characterized by the distance between the first(64A) and second(64B) locations.

Metering pump having a stationary portion and a pump portion, which is mounted in a linear manner and can be moved relative to the stationary portion in order to move a displacement body, wherein, for the purpose of achieving a long service life, the pump portion is connected in an electrically potential-equalizing manner to the stationary portion via an electrically conductive spring element.

Metering pump having a stationary portion and a pump portion, which is mounted in a linear manner and can be moved relative to the stationary portion in order to move a displacement body, wherein, for the purpose of achieving a long service life, the pump portion is connected in an electrically potential-equalizing manner to the stationary portion via an electrically conductive spring element.

A pump assembly (22) including a piston (36) reciprocal within a cylinder (48) for pressurizing a fluid in a pressure chamber (38) of the cylinder. A biasing member is configured to exert a driving force on the piston to drive the piston in a pumping direction from a reset position to a deployed position. A drivetrain (34) is engageable with the piston and provides power sufficient to transition the piston back to the reset position. A stroke limiting mechanism (42) has a stopping member (82) with a stopping surface (86) against which a protrusion (92) of the piston contacts to define a stroke length of the piston by limiting movement of the piston in the pumping direction (94) when the protrusion engages the stopping surface. The stopping member has a first configuration corresponding to a first stroke length for the piston and a second configuration corresponding to a second stroke length.