Abstract: An improved pump for providing pressurized fluid to a pressurized fluid operating device for opening and closing a door comprising having a pump housing with a pump chamber therein; a rotatable pumping element within the pump chamber; a pair of passages adapted for connection to a pressurized fluid operating device extending from the pump chamber to the exterior of the pump housing; means for driving the pump element in rotation; and a pair of pressure responsive bypass valves. The pump element is adapted to deliver pressurized fluid to either one of the pair of passages as determined by the sense of rotation of the pump element, with the other passage receiving the exhaust flow of pressurized fluid. Each of the pressure responsive bypass valves is connected to a different one of the pair of passages in the pump housing and is adapted to bypass pressurized fluid at a predetermined pressure setting.

Abstract: An improved hydraulic door actuator comprising a hydraulic fluid pump having first and second ports; integral operating cylinder and fluid control apparatus including a barrel coupled at each end to the first and second ports of the hydraulic fluid pump; a piston fluidly sealed within the barrel; and means for controlling the flow of fluid of the hydraulic fluid pump to and from the barrel disposed between the barrel and the first and second ports such that the door automatically slows to a stop upon opening or closing wherein the fluid flow control means comprises a plurality of openings disposed along the length of the barrel for bypassing pressurized fluid from the barrel.

Abstract: A facing for a golf club having a series of channel-shaped spaced apart slots, said slots having a width of approximately 0.080 inches; said slots having a depth of 0.020 inches; and the distance between each set of slots being approximately 0.080 inches is disclosed.