A cordless electric device having improved contact means

Claim 2

A cordless electric device having a housing (16), a motor (not shown) mounted in the housing (15 or 16) and a battery source (62) detachably connectable to the housing to operate the motor; wherein there are provided: a) a hollow portion (36) formed in the housing (16) and adapted removably to receive the battery source (62) therein; b) a pair of terminals (48,50) electrically isolated (52) from each other and in circuit with the motor extending into the hollow portion (36) with c) each of the terminals (48, 50) in spaced relationship with the other terminal (50,48) and adapted to make individual electrical contact with the battery source (62); characterised by the feature that d) resilient means (66) are provided yieldably enaging a pair of terminals (48,50) to provide an increased mechanical and electrical connection between said terminals (48,50) and the respective battery source (62 via 58,60).

Claim 3

A device as claimed in claim 1 characterised by the feature that there are provided: a) the resilient means defines an "0"-ring (66) made of dielectric material, and b) the "0"-ring (66) encircles the pair of terminals (48,50) continuously to urge said terminals (48,50) toward each other whereby upon connection with the battery source (62) the mechanical and the electrical connection therebetween will be increased.

Claim 4

3 . A cordless electric device having a motor (not shown) mounted in a housing (16), a control switch (26) in circuit with the motor to operate the motor, and a battery source (62) connectable to the housing, wherein there are provided a) a hollow portion (36) formed in the housing (16) b) a pair of motor terminals (48,50) individually in circuit with the motor with c) the motor terminals (48,50) extending into the hollow portion (36) in predetermined spaced relationship to each other, d) a battery pack (30) detachably connected to the housing (16) and having the battery source (62) therein, e) an insertion portion (56) formed in the battery pack (30) and said portion receivable within the hollow portion (36), f) a pair of battery terminals (58,60) spaced from each other on opposite sides of the insertion portion (56) and individually in circuit with the battery source (62), g) the pair of battery terminals (58,60) and the pair of motor terminals (48,50) to mate in individual pairs, respectively, upon the battery pack (30) being connected to the housing (16), and characterised by the feature that there are provided h) a resilient means operatively (66) associated with one of the pairs of terminals (58, 60 or 48, 50) to urge each of said terminals into increased mechanical and electrical connection with the respective mating terminal thereof (48,50 or 58,60).

Claim 5

3 . A cordless electric device having a motor (not shown) mounted in a housing (16), a control switch (26) in circuit with the motor to operate the motor, and a battery source (62) connectable to the housing, wherein there are provided a) a hollow portion (36) formed in the housing (16) b) a pair of motor terminals (48,50) individually in circuit with the motor with c) the motor terminals (48,50) extending into the hollow portion (36) in predetermined spaced relationship to each other, d) a battery pack (30) detachably connected to the housing (16) and having the battery source (62) therein, e) an insertion portion (56) formed in the battery pack (30) and said portion receivable within the hollow portion (36), f) a pair of battery terminals (58,60) spaced from each other on opposite sides of the insertion portion (56) and individually in circuit with the battery source (62), g) the pair of battery terminals (58,60) and the pair of motor terminals (48,50) to mate in individual pairs, respectively, upon the battery pack (30) being connected to the housing (16), and characterised by the feature that there are provided h) a resilient means operatively (66) associated with one of the pairs of terminals (58, 60 or 48, 50) to urge each of said terminals into increased mechanical and electrical connection with the respective mating terminal thereof (48,50 or 58,60).

Claim 6

A device as claimed in claim 3, characterised by the feature that there are provided: a) the resilient means defines an "0"-ring (66) made of dielectric material, and b) the "0"-ring (66) encircles the motor terminals (48,50) continually to urge the motor terminals (48,50) toward each other, and momentarily to yield upon engagment therewith by the respective battery terminals (58,60).

Claim 7

A device as claimed in claim 4 characterised by the feature that there are provided: a) the hollow portion (36) had oppositely facing walls (38) b) each of the motor terminals (48,50) extends along one of the walls in spaced relationship thereto and, c) the "0"-ring (66) extends adjacent the oppositely facing walls and upon connection of the battery pack (30) to the housing (16) the motor terminals (48,50) urge the "0"-ring in the direction of the adjacent walls.

Claim 8

A device as claimed in claim 5 characterised by the feature that there are provided: a) the motor terminals (48,50) define parallel legs electrically from each other, and b) each of the legs have a free end (52) bent in the direction of the adjacent walls.

Claim 9

A device as claimed in claim 6 characterised by the feature that there are provided: a) a recess (54) is formed in each of the walls corresponding to the free end (52) of the respective legs whereby upon connection of the battery pack (30) to the housing (16) the motor terminals (48,50) are expanded to force the free ends (52) thereof into the respective adjacent recesses (54).

Claim 10

8 . A device as claimed in claim 7, characterised by the feature that there are provided: a) each of the motor terminals (48,50) have straight legs extending into the hollow portion (36), b) the free end (52) of each leg is bent away from each other toward the adjacent walls, and c) the "0" ring (66) is sized to fit within the space between the respective motor terminals (48,50) and the adjacent wall (38) and to be squeezed against said wall upon connection of the battery terminals (58,60) to the motor terminals (48,50).