Abstract: A door closer comprises a housing mountable to one of a door or a door frame, an arm having a first end pivotally attached to the housing and a second end connected to the other of the door or door frame, the arm being movable between a neutral door position and first and second open door positions up to 180 degrees from the neutral position in opposite directions, and opposing first and second racks movable relative to each other and relative to the housing. Each of the first and second racks has a first end adapted to engage a piston within the housing. The door closer further comprises a pinion within the housing pivotally connected to the arm first end and engaging teeth of the first and second racks, a piston having a first end adapted to engage the first end of the first and second racks, and a spring compressible by an opposite end of the piston.

Abstract: A door closer comprises a housing mountable to one of a door or a door frame, an arm having a first end pivotally attached to the housing and a second end connected to the other of the door or door frame, the arm being movable between a neutral door position and first and second open door positions up to 180 degrees from the neutral position in opposite directions, and opposing first and second racks movable relative to each other and relative to the housing. Each of the first and second racks has a first end adapted to engage a piston within the housing. The door closer further comprises a pinion within the housing pivotally connected to the arm first end and engaging teeth of the first and second racks, a piston having a first end adapted to engage the first end of the first and second racks, and a spring compressible by an opposite end of the piston.

Abstract: A hold open arm assembly for a door closer to facilitate access to the holding feature by a resiliently biased plunger on a closer arm that is mounted to a soffit plate. A soffit ramp may extend from the soffit plate to provide a sloped surface for engagement by the plunger, leading to the plunger being gradually depressed as the door continues to open and receiving in a recessed area of its free end a rivet head at the soffit plate to hold the door open. When the first arm member pivots relative to the soffit plate and the plunger approaches the head, the plunger engages the sloped surface of the soffit ramp, slides along the sloped surface toward the head, and receives at least a portion of the head in the opening in the free end.

Abstract: A hold open arm assembly for a door closer to facilitate access to the holding feature by a resiliently biased plunger on a closer arm that is mounted to a soffit plate. A soffit ramp may extend from the soffit plate to provide a sloped surface for engagement by the plunger, leading to the plunger being gradually depressed as the door continues to open and receiving in a recessed area of its free end a rivet head at the soffit plate to hold the door open. When the first arm member pivots relative to the soffit plate and the plunger approaches the head, the plunger engages the sloped surface of the soffit ramp, slides along the sloped surface toward the head, and receives at least a portion of the head in the opening in the free end.

Abstract: An electro-hydraulic control module for deactivating and reactivating intake and exhaust valves in an internal combustion engine comprising a series of stacked plates that form hydraulic valves, manifolding for supply, control and exhaust hydraulic flow and supports electromagnetic solenoids for activating the hydraulic valves. The plate structure is economical to manufacture and is advantageously small in vertical size. A bleed circuit keeps the hydraulic system relatively free of air to achieve fast, reliable and repeatable performance.