Battery powered power tools

• US 4,032,806 A
• Filed: 02/02/1976
• Issued: 06/28/1977
• Est. Priority Date: 02/02/1976
• Status: Expired due to Term

• Current Assignee: Ryobi Motor Products Incorporated (Techtronic Industries Company Limited)
• Original Assignee: Singer PLC (Hayleys Plc)
• Inventors: Seely, Robert West
• Primary Examiner(s): Skudy, R.
• Application Number:
  US05/654,330
• Time in Patent Office: 512 Days
• Field of Search: 310/50, 310/47, 310/89, 310/71, 310/91, 151/69, 339/92, 85/1 K, 292/251, 320/2
• US Class Current: 310/50
• CPC Class Codes: B25F 5/02 Construction of casings, bodies or handles B25F5/006, B25F5/008 take precedence
• 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: H02K 7/145 Hand-held machine tool
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A battery powered power tool which includes a housing having one portion for journaling the motor and another portion detachably connected thereto, for carrying the battery pack. Suitable plug and socket means are provided in each of the housing portions, so that when such portions are interconnected, the battery pack will be in circuit with the motor. Connecting means in the form of a retaining nut non-rotatively affixed to the motor portion of the housing, and a rotative screw carried by the battery portion of the housing serve to mechanically join the housing portions . The screw is retained in the battery portion by a neck-down portion formed in the aperture in which the screw is disposed. The screw will be threaded or otherwise forced through the neck-down portion which resiliently yields to permit passage of the enlarged threaded section thereof.

Claims

1. A power tool having a motor powered by a battery pack comprising:

(a) a housing having one portion for journaling the motor and another portion for carrying the battery pack;

(b) plug and socket means separately carried on each of the housing portions and detachably connectable to each other to place the battery pack in circuit with the motor;

(c) connecting means including a nut carried in the motor portion of the housing, and a screw carried by the battery portion of the housing and adapted to be mechanically connected to the nut to join the housing portions, and the plug and socket means operatively together;

(d) the screw having a longitudinal shank intermediate and an enlarged head at one end, and a threaded section at the other end;

(e) a longitudinal aperture formed in the battery portion of the housing;

(f) a necked-down portion formed in the aperture of a cross-sectional area larger than the shank, and smaller than the head and threaded section of the screw, whereby upon the screw being forced through the neck-down portion of the aperture the screw will remain normally entrapped therein by the neck-down portion with the screw free to rotate in the aperture;

(g) the motor portion of the housing having two interconnected clamshell members;

(h) a recess formed in each of the clamshell members in alignment with each other; and

,

(i) the nut disposed in the recesses to be held non-rotatively therein upon the clamshell members being interconnected.

2. The combination claimed in claim 1 wherein:

(a) The neck-down portion is formed of a pliable material which will resiliently yield to permit the threaded section of the screw to pass axially therethrough upon rotation of the screw.

3. The combination claimed in claim 2 wherein:

(a) A tapered tip is formed on the leading edge of the screw adjacent the threaded section to facilitate easy entrance into and through the neck-down portion of the aperture.

4. A power tool having a motor powered by a battery pack comprising:

(a) a housing having one portion for journaling the motor and another portion for carrying the battery pack;

(b) plug and socket means separately carried on each of the housing portions and detachably connectable to each other to place the battery back in circuit with the motor;

(c) connecting means including a non-rotative member carried by one of the housing portions, and a rotative member carried by the other housing portion and adapted to be mchanically connected to the non-rotative member to join the housing portions and the plug and socket means operatively together;

(d) the non-rotative member defining a nut;

(e) the rotative member defining a screw;

(f) The screw having a longitudinal shank intermediate and an enlarged head at one end, and a threaded section at the other end;

(g) a longitudinal aperture formed in the housing portion carrying the screw;

(h) a necked-down portion formed in the aperture of a cross-sectional area larger than the shank, and smaller than the head and threaded section of the screw, whereby upon the screw on being forced through the neck-down portion of the aperture will remain normally entrapped therein while the screw is free to rotate in the aperture;

(i) the housing portion carrying the screw is made of a plastic material; and

,

(j) the neck-down portion is pliable and will resiliently yield to permit passage of the threaded section of the screw.

5. The combination claimed in claim 4 wherein:

(a) the screw is longitudinally of greater length than the housing portion carrying the screw;

(b) the aperture having a countersunk portion thereof at one end; and

(c) the head to nest in the countersunk portion of the aperture when the connecting means are joined.

6. The combination claimed in claim 5 wherein:

(a) each of the housing portions has a substantially flat face at their respective ends thereof which are joined together by the connecting means;

(b) A peripheral annular recess formed adjacent the flat face of one of the housing portions; and

(c) a peripheral flange formed adjacent the flat face of the other housing portion and adapted to fit within the recess of the other housing portion upon the connecting means joining the housing portions together.