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US 4,976,173 AGranted
Manual electric tool
OwnerTai-Her Yanginventor
Life of this patent
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OwnerTai-Her Yanginventor
Estimating the term…
A manual electric tool which has a housing having a handle and a body. The housing has a socket formed in the body and electrical contacts are accessible internally of the socket. The electrical contacts are connected to a source of energy through the handle. A removable power unit is adapted to be received within the socket and retained within the housing. A second pair of electrical contacts are carried by the power unit and adapted to engage the electrical contacts in the socket when the power unit is inserted in the socket. A motor in the power unit is connected to the electrical contacts. A shaft driven by the motor protrudes beyond the power unit. The shaft receives a tool implement on the protruding portion. The power unit has opposite end portions and the shaft protrudes beyond each end. The opposite end portions of the shaft may be directly driven by the motor, may be driven through a speed reduction gearing or combinations thereof. Other embodiments may not have an electric motor in the power unit and have directly powered implements at opposite ends of the power unit. In this manner, the power unit may be inserted into the socket in a desired orientation to provide two distinct implements.
An electric tool comprising a housing including a handle, the housing having a forwardly-opening socket formed therein, a first pair of spaced-apart electrical contacts carried by the housing and accessible internally of the socket, means within the handle for connecting the first pair of contacts with a source of electrical energy, a power unit adapted to be received within the socket and retained within the housing, a second pair of spaced-apart electrical contacts carried by the power unit and adapted to engage the first pair of spaced-apart electrical contacts when the power unit is inserted into the socket in the housing, a motor in the power unit and connected to the source of electrical energy through the engaging first and second pairs of electrical contacts, respectively, a shaft diven by the motor and having a portion thereof protruding beyond the power unit, means carried by the protruding portion of the shaft to receive a tool implement, and speed-reduction gearing between the motor and the protruding portion of the shaft.
An electric tool comprising a housing including a handle, the housing having a forwardly-opening socket formed therein, a first pair of spaced-apart electrical contacts carried by the housing and accessible internally of the socket, means within the handle for connecting the first pair of contacts with a source of electrical energy, a power unit adapted to be received within the socket and retained within the housing, a second pair of spaced-apart electrical contacts carried by the power unit and adapted to engage the first pair of spaced-apart electrical contacts when the power unit is inserted into the socket in the housing, a motor in the power unit and connected to the source of electrical energy through the engaging first and second pairs of electrical contacts, respectively, the power unit having one end portion and further having another end portion opposite to the one end portion, a shaft driven by the motor and having a portion thereof protruding beyond each end portion of the power unit, means carried by each protruding portion of the shaft to receive a tool implemert thereon, such that the power unit may be removed from the socket in the housing and reinserted therein in a desired orientation.
An electric tool comprising a housing including a handle, at least one electric battery disposed within the handle, the housing having a forwardly-opening socket formed therein, a first pair of spaced-apart electrical contacts carried by the housing and accessible internally of the socket, means within the handle for connecting the first pair of contacts with the electrical battery, a power unit adapted to be received within the socket and retained within the housing, a second pair of spaced-apart electrical contacts carried by the power unit and adapted to engage the first pair of spaced-apart electrical contacts when the power unit is inserted into the socket in the housing, a motor in the power unit and connected to the source of electrical energy through the engaging first and second pairs of electrical contacts, respectively, a shaft driven by the motor and having a portion thereof protruding beyond the power unit, and means carried by the protruding portion of the shaft to receive a tool implement.
An electric tool comprising a housing including a handle, the housing having a forwardly-opening socket formed therein, a first pair of spaced-apart electrical contacts carried by the housing and accessible internally of the socket, means within the handle for connecting the first pair of contacts with a source of electrical energy, a power unit adapted to be received within the socket and retained within the housing, a second pair of spaced-apart electrical contacts carried by the power unit and adapted to engage the first pair of spaced-apart electrical contacts when the power unit is inserted into the socket in the housing, the power unit having a one end portion and further having another end portion opposite to the one end portion, the one end portion adapted to receiving a first electric implement and the other end portion adapted to receiving a second electric implement such that the power unit may be removed from the socket in the housing and reinserted therein in a desired orientation to provide two distinct implements.
Dependencies are inferred from the claim text.