POWER PACK

• US 3,883,789 A
• Filed: 03/19/1974
• Issued: 05/13/1975
• Est. Priority Date: 06/08/1973
• Status: Expired due to Term

• Current Assignee: Dieter Achenbach, Siegfried Adolf Joswig, Walter Kolb
• Original Assignee: Dieter Achenbach, Siegfried Adolf Joswig, Walter Kolb
• Inventors: Achenbach, Dieter, Joswig, Siegfried Adolf, Kolb, Walter
• Primary Examiner(s): Miller, J. D.
• Assistant Examiner(s): Hickey, Robert J.
• Application Number:
  US05/452,634
• Time in Patent Office: 420 Days
• Field of Search: 320/2-5 310/50 30/DIG.1 15/DIG.1 16/DIG.15 307/150
• US Class Current: 429/9
• CPC Class Codes: A01G 3/00 Cutting implements specially adapted for horticultural purposes; Delimbing standing trees forestry delimbers A01G23/095
• CPC Class Codes: H01M 50/213 adapted for cells having curved cross-section, e.g. round or elliptic H01M50/209, H01M50/216 take precedence
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y10S 15/01 Rechargeable batter
• CPC Class Codes: Y10S 30/01 Rechargeable battery operated

Abstract

The specification describes a power pack for house and garden equipment with an electric motor drive. Rechargeable batteries including a battery charger and a battery charger plug are mounted in a housing, which with a guide holding collar having two electrical contact terminals can be slid into a correspondingly shaped recess with a close fit in the housing of an article of equipment and can be locked in place.

Claims

1. A power pack for use with a hand tool comprising a housing, an electric motor positioned within the forward end of said housing;

a reciprocating tool assembly extending from the forward end of said housing and being coupled for operation to said motor;

an integral handle portion extending rearwardly from the rear upper portion of said housing;

the rear-most free end of said handle having a downwardly facing groove defined by a pair of spaced surfaces;

the lower rear portion of said tool housing having a hollow rearwardly facing collar;

first electrical contact means along one interior surface of said collar;

one wall of said collar having an opening;

said power pack comprising;

an L-shaped housing;

a plurality of batteries in said L-shaped housing;

means in said L-shaped housing for electrically connecting said batteries;

one limb of said L-shaped housing having a configuration conforming to the shape of the hollow limb receiving collar provided at the lower rear end of said tool housing;

said one limb being adapted to be slidably inserted into said hollow collar;

second electrical contact means along one exterior portion of said one limb and means for connecting said second contact means to said batteries;

said second contact means slidably engaging said first contact means when said one limb is inserted into said collar;

the remaining limb of said L-shaped housing having a T-shaped projection for slidably engaging the facing edges of said spaced surfaces when said one limb is inserted into said hollow collar;

said one limb having a locking projection, biasing means for urging said locking projection outwardly and into said collar opening to lock said L-shaped housing in said collar when said one limb is inserted into said hollow collar;

said tool housing handle and said L-shaped housing collectively defining a large opening for receiving the operator'"'"''"'"'s hand to facilitate gripping of the tool.

2. The tool of claim 1 wherein the opening in said limb receiving collar and said locking projection face into said hand receiving opening.

3. A power pack in accordance with claim 1, characterised in that five batteries are accommodated in the L-shaped housing, of which respectively two pairs are arranged with parallel axes alongside each other and in a tandem fashion, while the remaining battery lies perpendicular to said two pairs of batteries.

4. A power pack in accordance with claim 1, characterised in that the first contact means of said holding collar comprises contact connecting lugs, which cooperate with said secOnd contact means comprised of contact connection springs arranged within a recess with a close fit of the housing.