Abstract: A razor cartridge has a housing with a blade mounting region between a guard and a cap. A first, second and third razor blade are sequentially mounted in the blade mounting region. An over-guard is secured over the blades. The cutting edges of the blades have an as-defined increased sharpness. The blades are mounted at a reduced angle between each blade portion bearing the cutting edge and a reference plane tangential to the cutting edges of the first and third blade. Individual longitudinal members of the over-guard that lie over each blade and have a progressively decreasing height above the reference plane in a front to back direction of the razor cartridge. A further longitudinal member is forward of the first blade and has a height above the reference plane.

Abstract: Systems, devices, and methods for applying machine learning to provide feedback related to a personal care device are described. Embodiments of the systems, devices, and methods may identify data from a device such as a razor comprising a plurality of sensors on a razor, predict one or more features such as shaving features based on the data using a machine learning model trained using data from the plurality of sensors, and provide shaving feedback based on the one or more features such as shaving features. Embodiments of the systems, devices, and methods may train a machine learning model, execute a trained machine learning model, capture and/or process data for the machine learning model, provide feedback based on the output of the trained machine learning model, or combinations thereof.

Abstract: A razor cartridge has an elongated housing with a guard having spaced-apart ribs; a cap at a respective front and rear region of the housing; and a partition extending between and integrally formed with opposed lateral side walls of the housing. A first razor blade is mounted in a first blade mounting region between the guard and the partition. A second razor blade adjacent the partition, and a third razor blade are mounted in a second blade mounting region between the partition and the cap. A first span between the cutting edge of the first razor blade and the cutting edge of the second razor blade is at least 3.0 mm up to 5.12 mm. Pivotal connecting structure of the housing defines a pivot axis in a region between the cutting edges of the first and second razor blades.

Abstract: A razor cartridge has a housing with a blade mounting region between a guard and a cap. A first, second and third razor blade are sequentially mounted in the blade mounting region. An over-guard is secured over the blades. The cutting edges of the blades have an as-defined increased sharpness. The blades are mounted at a reduced angle between each blade portion bearing the cutting edge and a reference plane tangential to the cutting edges of the first and third blade. Individual longitudinal members of the over-guard that lie over each blade and have a progressively decreasing height above the reference plane in a front to back direction of the razor cartridge. A further longitudinal member is forward of the first blade and has a height above the reference plane.

Abstract: A razor cartridge has an elongated housing with a guard having spaced-apart ribs; a cap at a respective front and rear region of the housing; and a partition extending between and integrally formed with opposed lateral side walls of the housing. A first razor blade is mounted in a first blade mounting region between the guard and the partition. A second razor blade adjacent the partition, and a third razor blade are mounted in a second blade mounting region between the partition and the cap. A first span between the cutting edge of the first razor blade and the cutting edge of the second razor blade is at least 3.0 mm up to 5.12 mm. Pivotal connecting structure of the housing defines a pivot axis in a region between the cutting edges of the first and second razor blades.

Abstract: A razor cartridge has a housing with a blade mounting region between a guard and a cap. A first, second and third razor blade are sequentially mounted in the blade mounting region. An over-guard is secured over the blades. The cutting edges of the blades have an as-defined increased sharpness. The blades are mounted at a reduced angle between each blade portion bearing the cutting edge and a reference plane tangential to the cutting edges of the first and third blade. Individual longitudinal members of the over-guard that lie over each blade and have a progressively decreasing height above the reference plane in a front to back direction of the razor cartridge. A further longitudinal member is forward of the first blade and has a height above the reference plane.

Abstract: Systems, devices, and methods for applying machine learning to provide feedback related to a personal care device are described. Embodiments of the systems, devices, and methods may identify data from a device such as a razor comprising a plurality of sensors on a razor, predict one or more features such as shaving features based on the data using a machine learning model trained using data from the plurality of sensors, and provide shaving feedback based on the one or more features such as shaving features. Embodiments of the systems, devices, and methods may train a machine learning model, execute a trained machine learning model, capture and/or process data for the machine learning model, provide feedback based on the output of the trained machine learning model, or combinations thereof.

Abstract: A razor cartridge has an elongated housing with a guard having spaced-apart ribs; a cap at a respective front and rear region of the housing; and a partition extending between and integrally formed with opposed lateral side walls of the housing. A first razor blade is mounted in a first blade mounting region between the guard and the partition. A second razor blade adjacent the partition, and a third razor blade are mounted in a second blade mounting region between the partition and the cap. A first span between the cutting edge of the first razor blade and the cutting edge of the second razor blade is at least 3.0 mm up to 5.12 mm. Pivotal connecting structure of the housing defines a pivot axis in a region between the cutting edges of the first and second razor blades.

Abstract: A pivotal bi-directional shave cartridge configured to shave a skin surface in a first and a second opposite direction is provided. The shave cartridge includes a housing, a first blade group, a second blade group, and a guard bar disposed between the two blade groups. The first blade group includes at least a first razor blade having a cutting edge. The second blade group includes at least a first razor blade having a cutting edge. A lengthwise extending center plane is disposed equidistant between the cutting edge of the first razor blade of the first blade group and the cutting edge of the first razor blade of the second blade group. The center plane is perpendicular to a reference plane that is tangential to the cutting edge of the first razor blade of the first blade group and the cutting edge of the first razor blade of the second blade group.

Abstract: A lubrication box for a shaving cartridge has a body including an upper wall and a sidewall in combination defining a cavity. The upper wall has an aperture. A support structure is disposed within the cavity. The support structure has a plurality of support structure apertures that extend, directly or indirectly, from the upper wall aperture. A solid shaving aid material is disposed within the cavity, the shaving aid material at least partially filling the upper wall aperture and the support structure apertures. A lid is attached to the sidewall such that the cavity is substantially closed. The support structure can be integrally formed with the body or the support structure and body can be separate structures. The support structure apertures can be aligned with the upper surface aperture or can be relatively angled.

Abstract: An interface for a waste disposal device includes a cassette and a waste disposal device. Features of the interface reside on the cassette and on the waste disposal device. The interface permits connection of the cassette into the waste disposal device to assist with proper insertion and/or attachment of the cassette to the waste disposal device. In one embodiment, one or more latch features in the waste disposal device engage with one or more ramp features on the cassette body.

Abstract: A safety razor includes a handle adapted to support a razor cartridge and a razor cartridge mounted to the handle. The razor cartridge includes a reservoir assembly and a cartridge assembly that defines a shave plane and is adapted to move with relation to the reservoir assembly during normal shaving operation. A delivery channel connects the reservoir assembly to the cartridge assembly. The reservoir assembly adapted to contain a non-solid shaving aid. The delivery channel is adapted to allow the non-solid shaving aid to flow between the reservoir assembly and the cartridge assembly during normal shaving operation. The delivery channel is further adapted to undergo an internal volume change that creates a pumping action as the cartridge assembly pivots with relation to the reservoir assembly during normal shaving operation.

Abstract: According to one aspect of the present invention, a lubrication box includes a first portion, a shaving aid material, and a second portion. The first portion of the lubrication box has a skin-engaging surface and at least one sidewall that, together, form a cavity. The skin-engaging surface includes at least two holes therethrough. The shaving aid material, which is optionally distributed in the cavity in a series of layers, is ultrasonically compressed into the cavity. The second portion of the lubrication box is attached to the first portion such that the cavity is substantially closed. A gap exists between in the cavity between the shaving aid and the second portion of the lubrication box to permit the shaving aid material to expand during normal use. The skin-engaging surface is askew relative to the shave plane of the blades.