611results about "Check valves" patented technology

A method for inspecting an erroneous / missing part of a discharge valve structure according to the present invention is a method for inspecting the erroneous / missing part of the discharge valve structure (1) of a compressor. The discharge valve structure (1) has an assembly structure including a partition wall (12), a discharge valve (12), a valve retainer (300) and a fixing bolt (40), and an inspection structure in which the valve retainer has an inspection hole (33) for inserting an inspection member and at least a part or the whole of the discharge valve enters a region of the discharge valve (20) corresponding to the inspection hole (33). The presence or absence of the discharge valve is inspected by inserting the inspection member into the inspection hole and by an insertion depth of the inspection member.

A double-use nozzle adapter includes a main body, a switch unit, and a needle unit. The switch unit includes a shifting member and a rigid retaining member. The rigid retaining member is arranged between the shifting member and the main body. The shifting member shifts the rigid retaining member between a first position and a second position. The needle unit is slidably installed in the main body and includes a needle. In the first position, the shifting member drives the rigid retaining member to press against the needle, thereby preventing the needle from moving with respect to the main body and making the needle connectable to a Schrader valve. In the second position, the rigid retaining member moves between the shifting member and the main body, so as to allow the needle to move with respect to the main body and make the needle connectable to a Presta valve.