Cordless circular saw
First Claim
Patent Images
1. A circular saw comprising:
- a motor housing having a first end portion and a second end portion in a direction parallel to an axis of rotation of a circular blade, the outer end of said second end portion having a recess configured to receive a removable battery pack in locking engagement;
a motor assembly disposed within said housing;
a handle assembly extending from said motor housing, said handle assembly having a gripping portion that is generally centered between said first and second housing end portions;
a rotary blade assembly including a circular blade having said axis of rotation, said blade assembly having a first predetermined weight and being disposed at said first end portion of said motor housing, said first predetermined weight multiplied by the distance from said blade assembly to said gripping portion defining a first moment arm;
a battery pack having a second predetermined weight and being configured to be placed in said recess of said second end portion of said housing, said second predetermined weight multiplied by the distance from said battery pack to said gripping portion of a handle assembly defining a second moment arm; and
said first moment arm is generally equal to said second moment arm.
1 Assignment
0 Petitions
Accused Products
Abstract
A circular saw including a motor housing having a first end portion and a second end portion, a motor assembly disposed within the housing, a rotary blade assembly having a predetermined weight mounted to the first end portion of the motor housing, and a battery pack having a predetermined weight disposed on the second end portion of the motor housing. The battery pack and the rotary blade assembly are configured and arranged to be in longitudinal alignment with one another, and the longitudinal alignment of the battery pack with the rotary blade assembly promotes counterbalancing between the predetermined weight of the rotary blade assembly and the predetermined weight of the motor housing.
33 Citations
7 Claims
-
1. A circular saw comprising:
-
a motor housing having a first end portion and a second end portion in a direction parallel to an axis of rotation of a circular blade, the outer end of said second end portion having a recess configured to receive a removable battery pack in locking engagement; a motor assembly disposed within said housing; a handle assembly extending from said motor housing, said handle assembly having a gripping portion that is generally centered between said first and second housing end portions; a rotary blade assembly including a circular blade having said axis of rotation, said blade assembly having a first predetermined weight and being disposed at said first end portion of said motor housing, said first predetermined weight multiplied by the distance from said blade assembly to said gripping portion defining a first moment arm; a battery pack having a second predetermined weight and being configured to be placed in said recess of said second end portion of said housing, said second predetermined weight multiplied by the distance from said battery pack to said gripping portion of a handle assembly defining a second moment arm; and said first moment arm is generally equal to said second moment arm. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A circular saw comprising:
-
a motor housing having a first end portion and a second end portion and a predetermined length from said first end portion to said second end portion in a direction generally parallel to an axis of rotation of a blade, the outer end of said second end portion having a recess configured to receive a removable battery pack in locking engagement; a motor assembly disposed within said housing; a handle assembly extending from said motor housing, said handle assembly having a gripping portion that is generally centered between said first and second housing end portions in a direction parallel to said axis of rotation, a rotary blade assembly including a circular blade with said axis of rotation, said assembly having a first predetermined weight and being disposed at said first end portion of said motor housing, said first predetermined weight multiplied by the distance from said assembly to said gripping portion defining a first moment arm; a battery pack having a second predetermined weight, and being configured to be placed in said recess of said second end portion of said housing, said second predetermined weight multiplied by the distance from said battery pack to said gripping portion defining a second moment arm; said first moment arm is generally equal to said second moment arm to thereby balance said saw about said gripping portion. - View Dependent Claims (7)
-
Specification