Abstract:
An actuator assembly includes a cylinder disposed in an actuator housing, the cylinder having a cylinder interior is in fluid communication with a source of pressurized fluid. A ram member has a piston head within the cylinder interior, and pressure on the piston head moves the ram member. An end of the ram member acts on a collar having a collar interior, and an end of a rod member is disposed within the collar interior. The rod member is displaceable relative to the collar such that the end of the rod member does not contact the collar. Accordingly, fluid in the cylinder interior acting on the ram member may expand due to thermal expansion without damaging a hard stop at an opposite end of the rod member and without losing system pressure by triggering a relief valve.
Abstract:
METHODS AND APPARATUS TO CHARGE ACCUMULATORS ARE DESCRIBED. AN EXAMPLE SYSTEM TO CHARGE AN ACCUMULATOR APPARATUS (100) INCLUDES A PISTON (104) DISPOSED WITHIN A HOUSING (102) TO DEFINE A FIRST CHAMBER ADJACENT A FIRST SIDE (106) OF THE PISTON AND A SECOND CHAMBER ADJACENT A SECOND SIDE (108) OF THE PISTON. A FILL PROBE (202) HAVING A BODY AND A PASSAGEWAY BETWEEN A FIRST END (306) OF THE FILL PROBE AND A SECOND END (308) OF THE FILL PROBE REMOVABLY COUPLES TO THE PISTON TO FLUIDLY COUPLE TO THE PASSAGEWAY OF THE FILL PROBE TO THE SECOND CHAMBER OF THE HOUSING WHEN THE ACCUMULATOR IS IN A CHARGING CONDITION. A VALVE (142) IS FLUIDLY COUPLED TO THE PISTON TO ENABLE FLUID FLOW TO THE SECOND CHAMBER OF THE HOUSING VIA THE PISTON (104) WHEN THE FILL PROBE IS COUPLED TO THE PISTON (104).
Abstract:
Example apparatus for absolute position detection are disclosed. An example apparatus includes a housing and digit gears coupled to the housing to rotate about respective parallel axes. Each digit gear has a first portion including a first set of teeth disposed about an entire circumference of the first portion and a second portion including a second set of teeth disposed about only a portion of a circumference of the second portion. Each digit gear is to correspond to a respective digit in a code representing an absolute position of a shaft. A respective idler gear between each adjacent pair of the digit gears is to be intermeshed with the first set of teeth of one of the digit gears and the second set of teeth of the other one of the digit gears.
Abstract:
An actuator assembly (10) includes a cylinder (26) disposed in an actuator housing (14), the cylinder having a cylinder interior (32) is in fluid communication with a source of pressurized fluid (36). A ram member (40) has a piston head (46) within the cylinder interior, and pressure on the piston head moves the ram member. An end of the ram member acts on a collar (50) having a collar interior (54), and an end of a rod member (82) is disposed within the collar interior. The rod member is displaceable relative to the collar such that the end of the rod member does not contact the collar. Accordingly, fluid in the cylinder interior acting on the ram member may expand due to thermal expansion without damaging a hard stop (129) at an opposite end of the rod member and without losing system pressure by triggering a relief valve.
Abstract:
Example apparatus for absolute position detection are disclosed. An example apparatus includes a housing and digit gears coupled to the housing to rotate about respective parallel axes. Each digit gear has a first portion including a first set of teeth disposed about an entire circumference of the first portion and a second portion including a second set of teeth disposed about only a portion of a circumference of the second portion. Each digit gear is to correspond to a respective digit in a code representing an absolute position of a shaft. A respective idler gear between each adjacent pair of the digit gears is to be intermeshed with the first set of teeth of one of the digit gears and the second set of teeth of the other one of the digit gears.
Abstract:
Rotary valve actuators having partial stroke damping apparatus are described herein. An example rotary valve actuator described herein includes a housing containing a first piston and a second piston opposite the first piston, where the pistons move in opposite directions to rotate a shaft of the rotary valve actuator. A damper is operatively coupled to at least one of the first piston or the second piston to slow the movement of the piston for only a portion of a stroke of the rotary valve actuator.