Abstract: A polymer having a constituent unit derived from a monomer represented by the following formula (0), wherein the polymer has sites in which the constituent units are linked by direct bonding between aromatic rings of the monomer represented by the formula (0): wherein R is a monovalent group, and m is an integer of 1 to 5, wherein at least one R is a hydroxyl group, an alkoxy group having 1 to 40 carbon atoms and optionally having a substituent, or an amino group having 0 to 40 carbon atoms and optionally having a substituent.

Abstract: A closed impeller includes an impeller body including a plurality of blade portions, and a shroud fitted on the impeller body. The shroud is press formed into a curved shape along end portions of the blade portions. The shroud includes a plurality of protrusions protruding from a surface facing the impeller body and extending, and curved, along the end portions of the plurality of blade portions. An amount of protrusion of each of the protrusions is less than a thickness of the shroud. A brazing material is provided at least on end portions of the protrusions.

Abstract: A closed impeller (1) includes an impeller main body (2), which is composed of an aluminum alloy and has blades (22) that protrude from a hub (21). A shroud (3) covers the blades. The blades and the shroud are joined together by brazed joints (4). The shroud (3) is formed from a brazing sheet (30) that comprises a core material (31), which is composed of an aluminum alloy, and a filler material layer (320), which is disposed on an outermost surface (33) of the shroud that opposes or faces the blades when the shroud is brazed to the blades.

Abstract: A locking device includes a lever configured to sway around a rotation axis and including a restriction part restricting an operation of a handle, a hole, and an attaching portion where a moving member configured to move in accordance with an operation of an actuator is attached; and a pressure member disposed in the hole and configured to make a first back-and-forth movement in accordance with an unlocking operation of a key. The pressure member moves the restriction part from a position for restricting the operation of the handle to a position for allowing the operation of the handle by swaying the lever around the rotation axis by pressing a first portion which is a portion of the hole in a forward movement of the first back-and-forth movement, and moves away from the first portion without swaying the lever in a backward movement of the first back-and-forth movement.

Abstract: A closed impeller includes an impeller body including a plurality of blade portions, and a shroud fitted on the impeller body. The shroud is press formed into a curved shape along end portions of the blade portions. The shroud includes a plurality of protrusions protruding from a surface facing the impeller body and extending, and curved, along the end portions of the plurality of blade portions. An amount of protrusion of each of the protrusions is less than a thickness of the shroud. A brazing material is provided at least on end portions of the protrusions.

Abstract: A refrigeration apparatus performs refrigeration by freezing circuitry using refrigerant. The refrigeration apparatus includes: an inner door that is provided with a thermal insulation material inside; a case section that includes a peripheral edge section facing a perimeter section of the inner door while the inner door is closed, and that is refrigerated inside by the refrigerant; a packing that is pressed between the perimeter section of the inner door and the peripheral edge section while the inner door is closed; a pipe that is placed along the peripheral edge section, and that circulates the refrigerant warmed by a compression effect of a compressor; and an outer door that covers the inner door while the inner door is closed.

Abstract: A refrigeration apparatus includes: a housing that surrounds an internal space (refrigeration chamber) where a refrigeration target is stored; and a negative pressure release port that includes a pipe (cylindrical body) attached to the housing so as to protrude into the internal space, a heating element provided in the pipe, and a rib joining the pipe and the heating element.

Abstract: This refrigeration device, which cools by means of a refrigeration cycle using a refrigerant, is provided with: a door; a box which has a peripheral edge that is opposite of the outer peripheral portion of the door when the door is in a closed state, and which is internally cooled by the refrigerant; and multiple pipes which are arranged along the surface of the peripheral edge and which circulate a refrigerant warmed by the compression action of a compressor.

Abstract: The invention is provided with a housing which has an inner space open in a first direction, a partition body which divides the inlet of the inner space into a plurality of openings arranged next to each other in a second direction perpendicular to the first direction, a door which is provided to each of the openings and which closes the opening from the first direction side, a first vacuum heat insulating material which is disposed inside the partition body, and a second vacuum heat insulating material which is disposed inside the door. The first vacuum heat insulating material and the second vacuum heat insulating material are arranged so as to overlap each other when viewed from the first direction side or from the second direction side.

Abstract: Provided is a negative pressure release port that can prevent freezing in a channel. This negative pressure release port comprises: a cylindrical member made of a pipe in which a fluid can pass through and a base; a heating element disposed on one end inside the pipe; a retaining member that retains the heating element; a rib that connects an inner wall face of the pipe and the retaining member; and a check valve that is provided inside the base provided more toward the other end than the heating element, that allows air passing through the interior of the base to flow from the other end to the one end, and prevents flow from the one end to the other end.

Abstract: A closed impeller (1) includes an impeller main body (2), which is composed of an aluminum alloy and has blades (22) that protrude from a hub (21). A shroud (3) covers the blades. The blades and the shroud are joined together by brazed joints (4). The shroud (3) is formed from a brazing sheet (30) that comprises a core material (31), which is composed of an aluminum alloy, and a filler material layer (320), which is disposed on on an outermost surface (33) of the shroud that opposes or faces the blades when the shroud is brazed to the blades.

Abstract: A processed article is manufactured with a tool including a cutting blade. The cutting blade is arranged to be in contact with two machined segment surfaces so that two contact points are defined between the two machined segment surfaces and the cutting blade in a corner. A machining pitch is set in a pick feed direction of the tool at the corner to a first machining pitch for when a part of the cutting blade corresponding to a projected shape of a side surface of the cutting blade having a first curvature radius is a cutting point. A cut is performed along a feed direction in the two adjacent machined segment surfaces successively at the corner so that the tool proceeds toward the corner in one of the machined segment surfaces and away from the corner in the other one of the machined segment surfaces.

Abstract: The present invention is provided with: a housing having an inner space that is open in a first direction; a door that enters the inner space of the housing from the first direction side; and a seal member that is brought into a compression state between the door and an inner space-facing inner peripheral surface of the housing in a state in which the door has entered the inner space.

Abstract: The invention is provided with a housing which has an inner space open in a first direction, a partition body which divides the inlet of the inner space into a plurality of openings arranged next to each other in a second direction perpendicular to the first direction, a door which is provided to each of the openings and which closes the opening from the first direction side, a first vacuum heat insulating material which is disposed inside the partition body, and a second vacuum heat insulating material which is disposed inside the door. The first vacuum heat insulating material and the second vacuum heat insulating material are arranged so as to overlap each other when viewed from the first direction side or from the second direction side.

Abstract: A processed article is manufactured with a tool including a cutting blade. The cutting blade is arranged to be in contact with two machined segment surfaces so that two contact points are defined between the two machined segment surfaces and the cutting blade in a corner. A machining pitch is set in a pick feed direction of the tool at the corner to a first machining pitch for when a part of the cutting blade corresponding to a projected shape of a side surface of the cutting blade having a first curvature radius is a cutting point. A cut is performed along a feed direction in the two adjacent machined segment surfaces successively at the corner so that the tool proceeds toward the corner in one of the machined segment surfaces and away from the corner in the other one of the machined segment surfaces.

Abstract: Disclosed is an ultra-low temperature freezer comprising a seal. The seal member has: hollow first and second air layer forming portions which are aligned in a row in a second direction between a first and second peripheral edges when a door is closed; and a first connection portion which is connected between the first and second air layer forming portions so as to form an air layer. The first connection portion has a shape that would overlap part of the first and second air layer forming portions if moved in parallel to the second direction. The outer peripheral surface of the first connection portion and the outer peripheral surfaces of the first and second air layer forming portions form first and second recessed portions extending in a first direction.

Abstract: This refrigeration device, which cools by means of a refrigeration cycle using a refrigerant, is provided with: a door; a box which has a peripheral edge that is opposite of the outer peripheral portion of the door when the door is in a closed state, and which is internally cooled by the refrigerant; and multiple pipes which are arranged along the surface of the peripheral edge and which circulate a refrigerant warmed by the compression action of a compressor.

Abstract: Provided is a negative pressure release port that can prevent freezing in a channel. This negative pressure release port comprises: a cylindrical member made of a pipe in which a fluid can pass through and a base; a heating element disposed on one end inside the pipe; a retaining member that retains the heating element; a rib that connects an inner wall face of the pipe and the retaining member; and a check valve that is provided inside the base provided more toward the other end than the heating element, that allows air passing through the interior of the base to flow from the other end to the one end, and prevents flow from the one end to the other end.

Abstract: A handle is provided with a main unit base having an engaging pin, a door base having a rotating shaft, a knob portion, and a rotation stopper. The knob portion has an engaging groove. The engaging groove has an open end. At the door-locking position, the engaging groove and the engaging pin become engaged with each other, and at the door-unlocking position, the engagement is released. When the knob portion is located at the door-unlocking position, the rotation stopper positions the knob portion such that the engaging pin is located inside an extension range of the open end. The engaging groove has a pushing surface, which pushes the engaging pin at the time of the displacement of the knob portion.

Abstract: Disclosed is an ultra-low temperature freezer comprising a seal. The seal member has: hollow first and second air layer forming portions which are aligned in a row in a second direction between a first and second peripheral edges when a door is closed; and a first connection portion which is connected between the first and second air layer forming portions so as to form an air layer. The first connection portion has a shape that would overlap part of the first and second air layer forming portions if moved in parallel to the second direction. The outer peripheral surface of the first connection portion and the outer peripheral surfaces of the first and second air layer forming portions form first and second recessed portions extending in a first direction.