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US 2006/0122005 A1Published application
Golf club device
AssigneeDevilray AS
InventorsJohnny Nilsson, Jon Karlsen, Arnulf Larsgard
Life of this patent
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AssigneeDevilray AS
InventorsJohnny Nilsson, Jon Karlsen, Arnulf Larsgard
Estimating the term…
A golf club device, more specifically a putter (1), comprising a head (2) and a shaft (3) attached to the head (2), the free end of the shaft (3) possibly being provided with a grip, wherein the moment of mass inertia of the head (2) constitutes less than seventy-nine percent of the total moment of inertia of the putter (1) when the putter (1) is rotated about an axis of rotation (4), which is perpendicular to the longitudinal axis (7) of the shaft (3) and about one hundred and twenty centimetres from the longitudinal axis (5) of the head (2), and/or wherein the mass of the shaft, including a possible displaceable weight (11), divided by the length of the shaft is at least one hundred and seventy grams per metre of shaft in a shaft which is up to one metre long, and at least one hundred and ninety grams per metre of shaft in a shaft which is longer than one metre.
A golf club device, more specifically a putter (1), comprising a head (2) and a shaft (3), which is attached to the head (2), the free end of the shaft (3) possibly being provided with a grip, characterized in that the moment of mass inertia of the head (2) constitutes less than seventy-nine percent of the total moment of inertia of the putter (1) when the putter (1) is rotated about an axis of rotation (4), which is perpendicular to the longitudinal axis (7) of the shaft (3) and about one hundred and twenty centimetres from the longitudinal axis (5) of the head (2), and/or that the mass of the shaft, including a possible displaceable weight (11), divided by the length of the shaft is at least one hundred and seventy grams per metre of shaft in a shaft which is up to one metre long, and at least one hundred and ninety grams per metre of shaft in a shaft which is longer than one metre.
A golf club device according to one or more of the preceding claims, characterized in that a displaceable weight (11) is disposed on the shaft (3) and arranged to be attached to the shaft (3).
Dependencies are inferred from the claim text.