# US 4,392,661 A · Supply apparatus to provide electricity to motor-driven appliances, especially lawn edge trimmers, driven with electric motors

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 4,392,661 A
- Document ID: US4392661A
- Status: Granted
- Kind: A
- Application number: 06/188,732
- Filed: 1980-09-19
- Granted: 1983-07-12
- Earliest claimed: 1979-09-22
- Inventors: Max Langenstein
- Web page: https://patentgrep.com/patent/US4392661A

## CPC

- B25F 5/00: Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
- Y02E 60/10: Energy storage using batteries
- Y10S 224/902: Battery carrier
- B25F: COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR {(machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass B23P23/00 and subgroups)}
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

An electrical supply apparatus particularly for hand-tools, in the form of a housing having a handle at its upper end and a bottom constituting a skid, the housing having a vertical, longitudinal median plane along which the skid bottom is elongated. An electrical cable can be wound in a recess above this bottom and emerges from an opening below the center of gravity of the apparatus by being connected to the housing by a stress relief. The curvature of the skid is greater in the longitudinal direction than in its transverse direction.

## Claims

### Claim 1

An electrical supply apparatus for hand-tools or the like, comprising:
an upright housing having a downwardly convex bottom elongated in one direction to form a runner extending in said direction, said housing being formed with a handle at its upper end, said housing having an outwardly open annular recess above said runner, said bottom having a greater curvature in a vertical median plane in said direction than transversely to said plane, said housing being formed with an opening in said plane and in said recess at a level not substantially above the center of gravity of the apparatus;
a battery in said housing;
a cable running to said battery extending out of said housing through said opening for connecting the apparatus to a hand-tool or the like, said cable being adapted to be coiled in said recess; and
cable-tension relief means connecting said cable to said housing.

### Claim 2 (depends on 1)

The electrical supply apparatus defined in claim 1 wherein said recess is defined between a pair of shoulders formed in said housing and vertically spaced apart thereon, said opening being provided adjacent the lower shoulder.

### Claim 3 (depends on 1, 2)

The electrical supply apparatus defined in claim 1 or claim 2 wherein said housing is formed by two identical congruent housing shells joined along said vertical median plane and each defining half of the housing.

### Claim 4 (depends on 3)

The electrical supply apparatus defined in claim 3 wherein each of said shells is symmetrical about another vertical median plane perpendicular to the first mentioned plane, said shells being provided with mating tongue and groove formations enabling their interconnection.