The Invention Of A Handheld Electric Mixer

Field of the Invention The current invention relates to handheld electric mixers and more particularly to variable speed handheld electric mixers.

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Background Information handheld electric mixers consist of a housing with an uppermost handle and a pair of downwardly extending rotational output spindles that removeably receive work pieces for mixing, beating, blending and or whipping food items or recipe constituents. The spindles are driven by a variable speed motor located in the housing via a reduction gearbox.

The electronic variable speed control can be a continuous type, in more expensive mixers, or a stepped speed control, comprising typically 3 stepped speeds, in less expensive mixers. Both speed control methods vary voltage to control the motor speed.

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Less expensive universal motors often used in such mixers might have a narrow speed torque range and so exhibit poor voltage speed control over the full speed range of the motor. This limits versatility of the mixer which ideally should be able to achieve very low mixer speeds for preparation of delicate food items or recipe constituents through to very high mixing speeds for thoroughly mixing, blending, beating, whipping or otherwise food items or recipe constituents.

In view of the foregoing there is disclosed herein a handheld electric mixer comprising a housing, a pair of rotational output spindles located with the housing for holding mixer work pieces, a variable speed motor located in The Invention Of A Handheld Electric Mixer housing and having a rotational output shaft, an electronic speed controller for controlling rotational speed the motor, and a two-speed gearbox located in the housing and receiving torque from the output shaft of the motor and transmitting the torque to the pair of rotational output spindles, wherein the gearbox has a first gear ratio for providing a first range of output speeds and a second ratio for providing a second range of output speeds, and wherein the first ratio transmits at least twice as much torque to the rotational output spindles as does the second ratio.

Preferably, the first ratio transmits three times as much torque to the rotational output spindles as does the second ratio. Preferably, the gearbox comprises a pair of shafts rotationally coupling the motor and spindles, a pair of first ratio shaft gears positioned on the shafts, a pair of second ratio shaft gears positioned on the shafts and a selector mechanism located on one of the shafts for selecting between the first ratio shaft gears or the second ratio shaft gears. Preferably, the output spindles include a par of spindle gears and the shafts are parallel to the output spindles such that the pair of shaft gears selectively engages with the pair of spindle gears.

Preferably, the shafts are perpendicular to the spindles, one of said shafts having a worm gear for rotationally engaging with the spindles gears https://modernalternativemama.com/wp-content/custom/argumentative-essay/wal-mart-brasil.php the other one of the shafts rotationally engaging the motor. Preferably, one of each of the first and second ratio gears is freely rotatable on one of the shafts and wherein the selector mechanism comprises a clutch disk positioned on the shaft between the freely rotatable gears and moveable axially along the shaft for alternatively engaging with The Invention Of A Handheld Electric Mixer freely rotatable gears for rotatable locking the engaged gear with the shaft.

Preferably, the clutch disk has opposed axial faces each having dogs for alternatively engaging the freely rotating gears and rotationally locking the engaged gear with the clutch disk. Preferably, the clutch disk is axially captive with a shifter The Invention Of A Handheld Electric Mixer and the shifter ring is coupled to a linkage for moving the shifter ring axially between the freely rotating gears. Preferably, in the first ratio position a first one of the shaft gears engages with a first one of the spindle gears and in the second ratio position a second one of the shaft gears engages with a second one of the spindle gears.

Further aspects of the invention will become apparent from the following description.

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Referring to FIGS. Rotational speed of the motor 19 is controlled electronically by an electronic speed controller A two-speed gearbox 24, having low and high gear ratios, receives torque from the output shaft 18 of the motor and transmits it to a pair of rotational output spindles The combination of electronic speed controller 25 and two-speed gearbox 24 provides the chief or cook with a larger range of torque and speed for mixing, blending, https://modernalternativemama.com/wp-content/custom/essay-service/where-to-buy-a-research-paper.php or otherwise acting upon a food item or recipe constituents.

As will be apparent to the skilled addressee, for any give power output torque is inversely proportional to speed i. Therefore, the first, low, gearing ratio provides the mixer with a high torque and low speed output and the second, high, gearing ratio provides the mixer with a low torque and high speed output. In the preferred embodiment the first, low, gearing ratio provide an output speed range of revolutions per minute rpm for preparation of thick or delicate food items or recipe constituents and the second, high, gearing ratio provide an output speed range of rpm for thoroughly mixing, blending, beating, link or otherwise food The Invention Of A Handheld Electric Mixer or recipe constituents.

Mixer speed within each range is controlled via the variable speed motor controller In the preferred embodiment, for any given electronic speed setting the low gearing ratio provides an output torque that is at least twice that of the high gearing ratio. The hand mixer comprises a housing 1 having a handle 2 for holding the mixer.]

The Invention Of A Handheld Electric Mixer - excited

The handheld electric mixer of claim 1 wherein the clutch disk has opposed axial faces, each face having dogs for alternatively engaging the freely rotating gears and rotationally locking the freely rotatable gear that is engaged with the clutch disk. The handheld electric mixer of claim 1 including a shifter ring and a linkage, wherein the clutch disk is axially captive with the shifter ring and the shifter ring is coupled to the linkage for moving the shifter ring axially between the freely rotating gears. The handheld electric mixer of claim 1 wherein, in a first ratio position, a first of the ratio shaft gears of each of the pair of first and second ratio shaft gears engages the pair of rotational output spindles, and, in a second ratio position, a second of the ratio shaft gears of each of the pair of first and second ratio shaft gears engages the pair of rotational output spindles. The handheld electric mixer of claim 5 wherein the clutch disk has opposed axial faces, each face having dogs for alternatively engaging the freely rotating gears and rotationally locking the freely rotating gear that is engaged with the clutch disk. The handheld electric mixer of claim 5 including a shifter ring and a linkage, wherein the clutch disk is axially captive with the shifter ring and the shifter ring is coupled to the linkage for moving the shifter ring axially between the freely rotating gears. The handheld electric mixer of claim 5 wherein, in a first ratio position, a first of the ratio shaft gears of each of the pair of first and second ratio shaft gears engages the pair of rotational output spindles, and, in a second ratio position, a second of the ratio shaft gears of each of the pair of first and second ratio shaft gears engages the pair of rotational output spindles. A handheld electric mixer comprising: a pair of rotational output spindles for holding mixer work pieces, an electric variable speed motor for driving the pair of rotational output spindles, and an output speed selector coupling the motor to the pair of rotational output spindles, wherein the speed selector comprises a pair of shafts rotationally coupling the motor to the pair of rotational output spindles, a pair of high ratio shaft gears positioned on the pair of shafts, a pair of low ratio shaft gears positioned on the pair of shafts, a selector mechanism located on one shaft of the pair of shafts for selecting between one of the pair of high ratio shaft gears and the pair of low ratio shaft gears, and a biasing spring biasing the selector mechanism to select the pair of high ratio shaft gears. Field of the Invention The current invention relates to handheld electric mixers and more particularly to variable speed handheld electric mixers.

Was: The Invention Of A Handheld Electric Mixer

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The Invention Of A Handheld Electric Mixer	A handheld electric mixer has a rotational output spindle for holding mixer work pieces, first and second gears located on the rotational output spindle, and a motor. The first gear is rotationally coupled to the motor output shaft. The mixer includes a two-speed gear-box receiving torque from the motor, and transmitting the torque to the output modernalternativemama.com by: 7. hand electric mixer held electric held mixer Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US29/, Inventor Stephen WongCited by: 7. Handheld electric mixer. United States Patent Abstract: A handheld electric mixer has a variable speed motor and a two-speed gearbox for transmitting driving torque of the motor to a pair of work pieces that mix, blend, beat or otherwise act upon a food item or recipe constituents. The gear box has a first gear ratio for providing a.