Plug-in connection for pipelines and hoses

A connection for connecting a generally cylindrical hose to a pipe, the hose having an outer surface and an inner surface defining a bore, the connection comprising:

• an inner sleeve sized to fit within the bore and to engage the inner surface;
• an outer sleeve sized to be placed about the outer surface of the hose and to engage the outer surface of the hose, the outer sleeve having a radially projecting detent projection that forms a stop surface;
• a pipe socket sized to be placed about the outer sleeve and having a circumferential slot formed in the pipe socket adjacent to the radially-projecting detent projection;
• and
• a snap-in pin having an inner surface, the inner surface having an indentation disposed within the slot and matched to the contour of the detent projection to engage the stop surface and a side of the slot in order to attach the outer sleeve to the pipe socket, the snap-in pin having a radially projecting handle.

A connection for connecting a generally cylindrical hose to a pipe, the hose having an outer surface and an inner surface defining a bore, the connection comprising:

• an inner sleeve sized to fit within the bore and to engage the inner surface;
• an outer sleeve sized to be placed about the outer surface of the hose and to engage the outer surface of the hose, the outer sleeve having a radially projecting detent projection that forms a stop surface;
• a pipe socket sized to be placed about the outer sleeve and having a circumferential slot formed in the pipe socket adjacent to the radially-projecting detent projection;
• a generally U-shaped detent spring having a leg with a central portion and an end connected to a curved portion, the curved portion engaging an outer surface of the pipe socket with the central portion of the leg disposed within the slot and engaging the stop surface of the detent projection and a side of the slot to attach the pipe socket to the outer sleeve and with the end of the leg being positioned outside of the slot and adjacent to the outer surface of the pipe socket;
• and
• the pipe socket has a locking cam on the outer surface, the cam engaging the spring end when the spring end is in a release position to maintain the spring end in the release position.

A connection for connecting a generally cylindrical hose to a pipe, the hose having an outer surface and an inner surface defining a bore, the connection comprising:

• an inner sleeve sized to fit within the bore and to engage the inner surface;
• an outer sleeve sized to be placed about the outer surface of the hose and to engage the outer surface of the hose, the outer sleeve having a radially projecting detent projection that forms a stop surface;
• a pipe socket sized to be placed about the outer sleeve and having a circumferential slot formed in the pipe socket adjacent to the radially-projecting detent projection;
• a generally U-shaped detent spring having a leg with a central portion and an end connected to a curved portion, the curved portion engaging an outer surface of the pipe socket with the central portion of the leg disposed within the slot and engaging the stop surface of the detent projection and a side of the slot to attach the pipe socket to the outer sleeve and with the end of the leg being positioned outside of the slot and adjacent to the outer surface of the pipe socket;
• and
• wherein the pipe socket has a longitudinally-extending recess having a sidewall and a floor adapted to accommodate the detent spring, the sidewall being spaced to provide a gap between the detent spring and the sidewall.

A connection for connecting a generally cylindrical hose to a pipe, the hose having an outer surface and an inner surface defining a bore, the connection comprising:

• an inner sleeve sized to fit within the bore and to engage the inner surface;
• an outer sleeve sized to be placed about the outer surface of the hose and to engage the outer surface of the hose, the outer sleeve having a radially projecting detent projection that forms a stop surface;
• a pipe socket sized to be placed about the outer sleeve and having a circumferential slot formed in the pipe socket adjacent to the radially-projecting detent projection;
• and
• a snap-in pin having an inner surface, the inner surface having an indentation disposed within the slot and matched to the contour of the detent projection to engage the stop surface and a side of the slot in order to attach the outer sleeve to the pipe socket, the snap-in pin having a stiffening rib extending circumferentially along an outer surface of the snap-in pin.