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US 8,978,258 B2Granted
Razor handle with a rotatable portion
AssigneeThe Gillette Company
InventorsAshok Bakul Patel, Emma Keeling, Matthew Frank Murgida, Robert Harold Johnson
Life of this patent
Estimating the term…
Abstract
A razor includes a cartridge having a blade, the cartridge configured to rotate about a first axis, and a handle coupled to the cartridge. The handle includes a first end, a second end opposite the first end, and a rotatable portion coupled to the second end such that the rotatable portion is configured to rotate relative to the first end and about a second axis. The rotatable portion includes a base and a retention system. The retention system is configured to apply a resistance torque upon the rotatable portion when the rotatable portion is rotated from an at rest position.
Claims18
A razor comprising:
- a cartridge comprising a blade;
- and
- a handle coupled to the cartridge by a blade cartridge connecting assembly such that the cartridge is configured to rotate about a first axis substantially parallel to the blade, the handle comprising:
- a first end;
- a second end opposite the first end;
- and
- a rotatable portion coupled to the second end such that the rotatable portion is configured to rotate relative to the first end and about a second axis substantially perpendicular to the blade and the first axis, wherein the rotatable portion comprises a base and a retention system, the retention system with the second end is configured to apply a resistance torque upon the rotatable portion when the rotatable portion is rotated from an at rest position,
- wherein a portion of the rotatable portion between the first axis and the second axis defines a cartridge moment arm and the retention system has a static stiffness as determined by a Static Stiffness Method such that a ratio of the static stiffness to the moment arm is about 0.05 N/degree to about 1.2 N/degree.
5 more elements
A razor comprising:
- a cartridge comprising a blade;
- and
- a handle coupled to the cartridge by a blade cartridge connecting assembly such that the cartridge is configured to rotate about a first axis substantially parallel to the blade, the handle comprising:
- a first end;
- a second end opposite the first end;
- and
- a rotatable portion coupled to the second end such that the rotatable portion is configured to rotate relative to the first end and about a second axis substantially perpendicular to the blade and the first axis, wherein the rotatable portion comprises a base and a retention system and wherein the retention system with the second end is configured to apply a resistance torque upon the rotatable portion when the rotatable portion is rotated from an at rest position,
- wherein a portion of the rotatable portion between the first axis and the second axis defines a cartridge moment arm and the rotatable portion has a damping value as determined by a Pendulum Test Method such that a ratio of the damping value to the moment arm is about 0.0005 N*sec/degree to about 0.02 N*sec/degree and the retention system has a static stiffness as determined by a Static Stiffness Method such that a ratio of the static stiffness to the moment arm is about 0.05 N/degree to about 1.2 N/degree.
5 more elements
A razor comprising:
- a cartridge comprising a blade;
- and
- a handle coupled to the cartridge by a blade cartridge connecting assembly such that the cartridge is configured to rotate about a first axis substantially parallel to the blade, the handle comprising:
- a first end;
- a second end opposite the first end;
- and
- a rotatable portion coupled to the second end such that the rotatable portion is configured to rotate relative to the first end and about a second axis substantially perpendicular to the blade and the first axis, wherein the rotatable portion comprises a base and a retention system and wherein the retention system with the second end is configured to apply a resistance torque upon the rotatable portion when the rotatable portion is rotated from an at rest position,
- wherein a portion of the rotatable portion between the first axis and the second axis defines a cartridge moment arm and the retention system has a static stiffness as determined by a Static Stiffness Method such that a ratio of the static stiffness to the moment arm is about 0.05 N/degree to about 1.2 N/degree and a ratio of an inertia of the rotatable portion to the moment arm is about 0.013 kg-mm to about 0.067 kg-mm.
5 more elements
Dependencies are inferred from the claim text.