Electric tool with source of power independent of the line
First Claim
Patent Images
1. An electric tool having a source of power that is independent of a utility power supply line, comprising:
- a housing having a grippable surface which may be gripped by a user of the electric tool;
a grip-shaped portion extending from a side of said housing which may also be gripped by the user;
first battery holding means attached to an end of said housing, and second battery holding means attached to an end of said grip-shaped portion for holding two battery packs in said tool, said electric tool having a center of gravity located by a combination of said two battery holding means and said two battery packs so that said electric tool is substantially balanced in any operating position of said tool;
said two battery packs increasing the duration of operation of said tool.
1 Assignment
0 Petitions
Accused Products
Abstract
An electric tool with a source of power that is independent of the line and with a transmission housing or motor housing that is also designed to function as a grip, with another grip merging into one side of it. To position the center of gravity such that the tool will be easier to handle and to allow the operator to continue working when one battery pack goes dead, attachments for battery packs are provided at the end of each grip.
77 Citations
11 Claims
-
1. An electric tool having a source of power that is independent of a utility power supply line, comprising:
- a housing having a grippable surface which may be gripped by a user of the electric tool;
a grip-shaped portion extending from a side of said housing which may also be gripped by the user;
first battery holding means attached to an end of said housing, and second battery holding means attached to an end of said grip-shaped portion for holding two battery packs in said tool, said electric tool having a center of gravity located by a combination of said two battery holding means and said two battery packs so that said electric tool is substantially balanced in any operating position of said tool;
said two battery packs increasing the duration of operation of said tool. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- a housing having a grippable surface which may be gripped by a user of the electric tool;
-
11. An electric tool having a source of power that is independent of a utility power supply line, comprising:
- a housing having a grippable surface which may be gripped by a user of the electric tool;
a grip-shaped portion extending from a side of said housing which may also be gripped by the user;
first battery holding means attached to an end of said housing, and second battery holding means attached to an end of said grip-shaped portion for holding two battery packs in said tool, said electric tool having a center of gravity located by a combination of said two battery holding means and said two battery packs so that said electric tool is substantially balanced in any operating position of said tool;
said two battery packs increasing the duration of operation of said tool;
a toggle switch for switching back and forth from one battery pack to the other battery pack in said first and second battery holding means attached to the end of said housing and to an end of said grip-shaped portion, said toggle switch having a first position for connecting one battery pack to operate said electric tool, said toggle switch having a second position for connecting the other battery pack to operate said electric tool;
a switching circuit for switching power selectively to that battery pack having the highest charge;
indicator means on each battery pack for showing level of charge of the battery pack;
rails with undercuts for said end of said housing and said end of said grip-shaped portion for mating with substantially similar rails and undercuts on said battery packs;
electrical contacts on a longitudinal side of one ral;
said contacts projecting out of said one rail to different extends;
a resilient tongue located parallel to said rails on each battery pack;
a nose-shaped portion on said tongue for snapping into said ends of said housing and said grip-shaped portion;
cover means having rails substantially identical to said rails and having snap-in webs for securing tools on a surface facing away from the rails on said cover means.
- a housing having a grippable surface which may be gripped by a user of the electric tool;
Specification