A foldable step apparatus having an upper tread with a first end and a second end, a first support pivotably joined to the first end at a first joint and a second support pivotably joined to the second end at a second joint. A lower tread has a third end and a fourth end, the third end pivotably joined to the second support at a third joint and a third support pivotably joined to the fourth end at a fourth joint. The lower tread has a first portion and a second portion pivotably joined at a fifth joint between the third end and the fourth end of the lower tread.

A foldable step apparatus having an upper tread with a first end and a second end, a first support pivotably joined to the first end at a first joint and a second support pivotably joined to the second end at a second joint. A lower tread has a third end and a fourth end, the third end pivotably joined to the second support at a third joint and a third support pivotably joined to the fourth end at a fourth joint. The lower tread has a first portion and a second portion pivotably joined at a fifth joint between the third end and the fourth end of the lower tread.

A washing machine, which is adapted for cages and accessories used in the field of research on laboratory animals, and which has a wash chamber and an assembly for introducing washing liquid and rinsing liquid into the wash chamber, includes: two loading levels in the wash chamber, each loading level having two shelves arranged in symmetrical positions relative to the median longitudinal axis of the wash chamber; supports for the shelves, the supports being located in symmetrical positions on both sidewalls of the wash chamber and allowing the shelves to be arranged at different tilting angles; three washing and rinsing assemblies oscillating and rotating about a respective longitudinal axis in the wash chamber, the three assemblies being fed by the assembly for introducing washing liquid and rinsing liquid, and being interposed between the loading levels and lying in a symmetrical vertical plane in the wash chamber; an assembly for causing the oscillation and rotation of the three washing and rinsing assemblies.

A washing machine, which is adapted for cages and accessories used in the field of research on laboratory animals, and which has a wash chamber and an assembly for introducing washing liquid and rinsing liquid into the wash chamber, includes: two loading levels in the wash chamber, each loading level having two shelves arranged in symmetrical positions relative to the median longitudinal axis of the wash chamber; supports for the shelves, the supports being located in symmetrical positions on both sidewalls of the wash chamber and allowing the shelves to be arranged at different tilting angles; three washing and rinsing assemblies oscillating and rotating about a respective longitudinal axis in the wash chamber, the three assemblies being fed by the assembly for introducing washing liquid and rinsing liquid, and being interposed between the loading levels and lying in a symmetrical vertical plane in the wash chamber; an assembly for causing the oscillation and rotation of the three washing and rinsing assemblies.

A kit for building a module for a pet comprises two bases and at least three wall panels. Each base comprises a base body extending along a first plane, a base contour wall extending substantially perpendicular to the first plane along its contour and a base secondary wall extending substantially parallel to the base contour wall thereby defining an anchoring space therebetween. Each wall panel comprises a panel body and a panel secondary wall substantially parallel to the panel body for insertion into the anchoring space between the base secondary wall and the base contour wall.

A kit for building a module for a pet comprises two bases and at least three wall panels. Each base comprises a base body extending along a first plane, a base contour wall extending substantially perpendicular to the first plane along its contour and a base secondary wall extending substantially parallel to the base contour wall thereby defining an anchoring space therebetween. Each wall panel comprises a panel body and a panel secondary wall substantially parallel to the panel body for insertion into the anchoring space between the base secondary wall and the base contour wall.

An animal pen retention system includes a collapsible animal cage that has a plurality of walls. Each of the walls is hingedly coupled together. Thus, the collapsible animal cage is positionable in a deployed position having the collapsible animal cage forming an enclosed geometric shape. A plurality of clips is provided. Each of the clips is positionable on the walls when the collapsible animal cage is positioned in the deployed position. Thus, each of the clips inhibits the collapsible animal cage from being urged out of the deployed position.

A grooming apparatus for a household pet is provided having a wall with an opening for admitting the pet into an enclosure, whereby a flexible, resilient sheet positioned in the opening is deflected by the pet and a pressure sensitive adhesive on the surface of the sheet attracts and retains loose pet hair.

A grooming apparatus for a household pet is provided having a wall with an opening for admitting the pet into an enclosure, whereby a flexible, resilient sheet positioned in the opening is deflected by the pet and a pressure sensitive adhesive on the surface of the sheet attracts and retains loose pet hair.

A deployable pet carrier assembly for a vehicle includes a sliding rail guide system configured to attach the pet carrier to a vehicle seat back and collapsible front, rear, and side walls defining a box structure when deployed. An actuator is provided, configured to retain or release the pet carrier walls for transitioning the pet carrier between a collapsed configuration and a deployed configuration. The sliding guide rail system includes front and rear guide rails configured to slidingly hold the pet carrier front wall and rear wall. A tray may be included to define a floor of the pet carrier.