CA1116593A - Electric household blender - Google Patents
Electric household blenderInfo
- Publication number
- CA1116593A CA1116593A CA000364760A CA364760A CA1116593A CA 1116593 A CA1116593 A CA 1116593A CA 000364760 A CA000364760 A CA 000364760A CA 364760 A CA364760 A CA 364760A CA 1116593 A CA1116593 A CA 1116593A
- Authority
- CA
- Canada
- Prior art keywords
- lock
- motor base
- bolts
- holder
- electric household
- 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
Links
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J43/00—Implements for preparing or holding food, not provided for in other groups of this subclass
- A47J43/04—Machines for domestic use not covered elsewhere, e.g. for grinding, mixing, stirring, kneading, emulsifying, whipping or beating foodstuffs, e.g. power-driven
- A47J43/07—Parts or details, e.g. mixing tools, whipping tools
- A47J43/075—Safety devices
- A47J43/0761—Safety devices for machines with tools driven from the lower side
- A47J43/0772—Safety devices for machines with tools driven from the lower side activated by the proper positioning of the cover
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J43/00—Implements for preparing or holding food, not provided for in other groups of this subclass
- A47J43/04—Machines for domestic use not covered elsewhere, e.g. for grinding, mixing, stirring, kneading, emulsifying, whipping or beating foodstuffs, e.g. power-driven
- A47J43/046—Machines for domestic use not covered elsewhere, e.g. for grinding, mixing, stirring, kneading, emulsifying, whipping or beating foodstuffs, e.g. power-driven with tools driven from the bottom side
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J43/00—Implements for preparing or holding food, not provided for in other groups of this subclass
- A47J43/04—Machines for domestic use not covered elsewhere, e.g. for grinding, mixing, stirring, kneading, emulsifying, whipping or beating foodstuffs, e.g. power-driven
- A47J43/06—Machines for domestic use not covered elsewhere, e.g. for grinding, mixing, stirring, kneading, emulsifying, whipping or beating foodstuffs, e.g. power-driven with a plurality of interchangeable working units, e.g. with a single driving-unit
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Food Science & Technology (AREA)
- Food-Manufacturing Devices (AREA)
Abstract
ABSTRACT
Electric household blender having a base enclosing a motor to drive the tools of an auxiliary unit such as a carved element, wherein the auxiliary unit is anchored by lock bars arranged thereon to bolts provided on the base.
The bolts can be rotatably moved together with a ring mounted on the base for the purpose of locking, which ring, in turn, cooperates with an operating switch to turn the drive motor on and off and with a positioning member, lock rod and lock fork. The lock bars are either rigidly arranged on the auxiliary unit and formed in two pieces, or formed as one-piece, double-bent, flat pushers mounted in a movable manner in the housing of the auxiliary unit. The operating switch and the lock bars can only be activated when the lock bolts have first entered into the recesses or lock bar in such a manner that the auxiliary unit is nonremovably locked in place.
Electric household blender having a base enclosing a motor to drive the tools of an auxiliary unit such as a carved element, wherein the auxiliary unit is anchored by lock bars arranged thereon to bolts provided on the base.
The bolts can be rotatably moved together with a ring mounted on the base for the purpose of locking, which ring, in turn, cooperates with an operating switch to turn the drive motor on and off and with a positioning member, lock rod and lock fork. The lock bars are either rigidly arranged on the auxiliary unit and formed in two pieces, or formed as one-piece, double-bent, flat pushers mounted in a movable manner in the housing of the auxiliary unit. The operating switch and the lock bars can only be activated when the lock bolts have first entered into the recesses or lock bar in such a manner that the auxiliary unit is nonremovably locked in place.
Description
;593 This application is a division of our Canadian patent application Serial no. 325,910 filed April 19, 1979.
The invention relates to an electric household blender having an attachable device in which cutting tools driven by a motor rotate, and a motor base with an electric switch.
In known devices of this type, if the material to be processed in the container is quite thin, the rotor often continues to rotate for several seconds after being turned off. If the user is not careful, he runs the danger of placing his hand in the container too early, before the blades have stopped, and severely injuring himself.
In order to protect the user of a household blender from injury by the still rotating blades, it has already been proposed ~German Publication
The invention relates to an electric household blender having an attachable device in which cutting tools driven by a motor rotate, and a motor base with an electric switch.
In known devices of this type, if the material to be processed in the container is quite thin, the rotor often continues to rotate for several seconds after being turned off. If the user is not careful, he runs the danger of placing his hand in the container too early, before the blades have stopped, and severely injuring himself.
In order to protect the user of a household blender from injury by the still rotating blades, it has already been proposed ~German Publication
2,228,189, Mantelet, August 30, 1973) to close the control circuit of a brake device of the motor as soon as the lid is removed from the container with the material to be processed. For this purpose the electrical circuit of the drive motor includes one or more switches connected in series, whose movable switch element can assume either an operating position in which the electrical circuit is closed, or a rest position in which this electrical circuit is open, whereby the movable switch element has one contact which in the rest position closes the control circuit of the brake device of the motor. Moving the switch out of the brake position to turn the blender on is effected by pressing the lid against the container. This known blender has the disadvantage that the user must continually press the lid of the device downward during operation, and cannot leave it unattended. Furthermore, the known blender cannot be combined with auxiliary units such as a mixer, citrus press or meat grinder, because these units require a firm anchor with the motor base.
The object of the present invention is to provide an electric household 6~i~3 blender in which, after the motor is turned off, all danger of injury from still rotating blades is eliminated and which allows the provision of auxiliary units. The apparatus is formed such that the user of the blender need not remain next to the apparatus during its operation. Finally, the type of inter-locking mechanism for the attachable device is formed such that the attachable device can have a different free diameter than that of the motor base.
This object is achieved according to the invention in that the contain-er is held by a container holder with lock bolt supports which can be placed on the motor base and which can be locked with lock bolts by means of a locking ring, for which purpose the locking ring, which is held and guided in the motor base, is rotatable about the longitudinal axis of the motor base and can be moved by a lock bolt. It cooperates with a lock bar which can be moved longi-tudinally in the motor base, and which in turn releasesor locks the operating switch for turning the motor on and off, depending on the position of the locking ring.
The motor base and container holder are advantageously provided with guide surfaces, whereby the container holder has lock openings or slots in the vicinity of the guide surfaces as lock bolt supports, in which lock bolts or studs engage. These lock bolts or studs are arranged on the movable lock ring and are supported and guided in openings in the housing of the motor base.
The container is advantageously provided with guide surfaces, at least two of which are arranged so as to be distributed on the circumferential surface~ whereby each locking pocket is provided with a locking groove or lock-ing slot and the locking pockets are enclosed in corresponding depressions equipped with guide surfaces, which are provided on the motor base.
By means of the apparatus according to the invention, it is assured that the apparatus can only be turned on when the container for the material to . . .
16~ 3 be blended or an au~iliary unit is placed on the motor base and is rigidly locked thereto. The unlocking procedure and subsequent removal of the contain-er holder requires so much time that the motor will surely have stopped before contact with the tools or blades is possible.
The invention allows a wide variety of possible embodiments. One of these is schematically illustrated in the attached drawings, wherein:
Figures 1 and 2 show an electric household blender in perspective view, whereby the holder for the container for receiving the material to be blended is shown separately from the motor base;
Figure 3 shows a partial section through the blender, whereby the device for locking the container holder, part of the container and the contain-er locked by the container holder are shown in section. The motor and wing blades are not depicted for better visibility;
Figure 4 shows a perspective partial illustration of the container holder with interlocking pocket;
Figure 5 shows a perspective partial illustration of the motor base;
Pigures 6 and 7 show a schematic and perspective illustration of the basic parts of the device for locking the container holder to the motor base;
The container l, together with the container lid 10, is held by a container holder 2 between the edge 20 of the container holder 2 on one side and the motor base 4 on the other side. In order to be able to lock the contain-er 1 with lid 10 to the motor base 4, said holder 2 has three interlocking pockets 5 with guide surfaces 35, 36 37 uniformly distributed about its cir-cumference. These guide surfaces are equipped with respective perpendicular pins 7 and a lock bolt support 12 ~Figure 4). When the holder 2 is placed on the motor base 4, the pins 7 move in the direction A of the arrows (Figure 4) and press against the lock bolts 8, three of which are distributed on the ~6593 circumference of a lock ring 9 arranged in the inside of the motor base 4, and thus make the interlocking mechanism (shown in Figures 6 and 7) ac~ivatable.
After placement of the h~der 2 and movement thereof in the direction A, the lock ring 9 which is movably mounted in the motor base 4 ~Figure 6) is pushed by the pins 7 in direction A against the force of springs 16. If the lock ring 9 is then rotated in direction C by the lock bar 11, the lock bolt 8 becomes enclosed in the lock bolt support 12 (Figure 7). The horizontally ar-ranged lock bolts 8 are held and guided for this purpose in L-shaped longitudi-nal holes 13 cut in the housing wall of the motor base 4. The lock ring 9 also has three longitudinal holes 17 distributed about its circumference whereby a screw 14 with spring 16 passes through each of these longitudinal holes 17, which screws 14 are attached at 15 to the motor base 4. The springs 16 press the lock ring 9 upward against arrow direction A.
On the outside wall of the motor base 4 in the area of the L-shaped longitudinal holes ~4, downwardly open guide studs 30 (Figure 5) with bores 28 are provided for the pins 7 of the interlocking pockets 5 so that they exactly meet the lock bolts 8 of the lock ring 9 when the container holder 2 is placed on the motor base 4. As shown in Figures6 and 7~ the lock ring 9 can be moved in direction C or D with the aid of the lock bar ll, which is guided in a longi-tudinal hole (not shown in greater detail) present in the housing wall of the motor base.
In addition to a stud 24, with which it is enclosed in a recess 43 of the lock ring 9, the lock bar 11 also has a lock fork 25 which acts together with the lock rod 26 movable in a perpendicular direction in the motor base 4 and in which, in turn, the studs 38 of the operating switch engage. When the lock ring 9 is in the position shown in Figure 7, i.e., when the holder 2 is locked by the bolts 8 and the lock bolt supports 12 after the lock bar 11 is moved in direction C, the lock rod 26 can be moved vertically upward in direction E by rotating the operating switch 27 in direction G, so that the lock rod 26 enters into the recess 29 of the lock fork 25. Only in this posi-tion (Figure 7) can the operating switch 27 be rotated and the motor be turned on to drive the wing blades. If the operating switch 27 is rotated in the opposite direction G, the lock rod 26 falls vertically downward against the direction E, so that the lock bar 11 can be moved in direction D. After the lock bar 11 is moved in direction D (Figure 6), the lock rod 26 is locked, because one end thereof abuts the shoulder 23, which renders the operating switch 27 incapable of rotating.
The exemplary embodiment of the holder 2 shown in Figure 3 is not only suited to hold a lid on a container and lock both parts (10 and 1) to the motor base 4, but rather the container 1 with lid 10 can be exchanged for a mixing unit, a meat grinder or a citrus press. These auxiliary units only require a base portion which corresponds in diameter d and height h (Figure 3) to the illu-strated container 1 and lid 10. Because the holder 2 is provided on its upper side with an opening o, parts of the auxiliary units can be formed in such a manner that they project far beyond the holder 2. Finally, container holders can be provided whose dimensions h and o are such that, for example with a mixing unit, it is impossible for the user to reach the rotating blades with the hand or fingers from the top through the opening. The inner surfaces of the holder are effectively provided with ribs, cams or the like (not shown), which reliably prevent the holder or the auxiliary unit from rotating about the blade axis when the motor is turned on. The electrical control portion in the motor base may also be provided with a known braking device, thus when the motor is turned off, the control circuit of a braking device is closed so that the motor instantaneously comes to a halt. Instead of an electrically operat-~6Si~3 ing braking clevice, the lock bar 26 can also be coupled with a mechanically operating motor brake. ~s soon as the lock bar moves opposite the arrow di-rection E, i.e., when the motor is turned off, it presses a brake shoe (not shown) against the motor shaft.
The object of the present invention is to provide an electric household 6~i~3 blender in which, after the motor is turned off, all danger of injury from still rotating blades is eliminated and which allows the provision of auxiliary units. The apparatus is formed such that the user of the blender need not remain next to the apparatus during its operation. Finally, the type of inter-locking mechanism for the attachable device is formed such that the attachable device can have a different free diameter than that of the motor base.
This object is achieved according to the invention in that the contain-er is held by a container holder with lock bolt supports which can be placed on the motor base and which can be locked with lock bolts by means of a locking ring, for which purpose the locking ring, which is held and guided in the motor base, is rotatable about the longitudinal axis of the motor base and can be moved by a lock bolt. It cooperates with a lock bar which can be moved longi-tudinally in the motor base, and which in turn releasesor locks the operating switch for turning the motor on and off, depending on the position of the locking ring.
The motor base and container holder are advantageously provided with guide surfaces, whereby the container holder has lock openings or slots in the vicinity of the guide surfaces as lock bolt supports, in which lock bolts or studs engage. These lock bolts or studs are arranged on the movable lock ring and are supported and guided in openings in the housing of the motor base.
The container is advantageously provided with guide surfaces, at least two of which are arranged so as to be distributed on the circumferential surface~ whereby each locking pocket is provided with a locking groove or lock-ing slot and the locking pockets are enclosed in corresponding depressions equipped with guide surfaces, which are provided on the motor base.
By means of the apparatus according to the invention, it is assured that the apparatus can only be turned on when the container for the material to . . .
16~ 3 be blended or an au~iliary unit is placed on the motor base and is rigidly locked thereto. The unlocking procedure and subsequent removal of the contain-er holder requires so much time that the motor will surely have stopped before contact with the tools or blades is possible.
The invention allows a wide variety of possible embodiments. One of these is schematically illustrated in the attached drawings, wherein:
Figures 1 and 2 show an electric household blender in perspective view, whereby the holder for the container for receiving the material to be blended is shown separately from the motor base;
Figure 3 shows a partial section through the blender, whereby the device for locking the container holder, part of the container and the contain-er locked by the container holder are shown in section. The motor and wing blades are not depicted for better visibility;
Figure 4 shows a perspective partial illustration of the container holder with interlocking pocket;
Figure 5 shows a perspective partial illustration of the motor base;
Pigures 6 and 7 show a schematic and perspective illustration of the basic parts of the device for locking the container holder to the motor base;
The container l, together with the container lid 10, is held by a container holder 2 between the edge 20 of the container holder 2 on one side and the motor base 4 on the other side. In order to be able to lock the contain-er 1 with lid 10 to the motor base 4, said holder 2 has three interlocking pockets 5 with guide surfaces 35, 36 37 uniformly distributed about its cir-cumference. These guide surfaces are equipped with respective perpendicular pins 7 and a lock bolt support 12 ~Figure 4). When the holder 2 is placed on the motor base 4, the pins 7 move in the direction A of the arrows (Figure 4) and press against the lock bolts 8, three of which are distributed on the ~6593 circumference of a lock ring 9 arranged in the inside of the motor base 4, and thus make the interlocking mechanism (shown in Figures 6 and 7) ac~ivatable.
After placement of the h~der 2 and movement thereof in the direction A, the lock ring 9 which is movably mounted in the motor base 4 ~Figure 6) is pushed by the pins 7 in direction A against the force of springs 16. If the lock ring 9 is then rotated in direction C by the lock bar 11, the lock bolt 8 becomes enclosed in the lock bolt support 12 (Figure 7). The horizontally ar-ranged lock bolts 8 are held and guided for this purpose in L-shaped longitudi-nal holes 13 cut in the housing wall of the motor base 4. The lock ring 9 also has three longitudinal holes 17 distributed about its circumference whereby a screw 14 with spring 16 passes through each of these longitudinal holes 17, which screws 14 are attached at 15 to the motor base 4. The springs 16 press the lock ring 9 upward against arrow direction A.
On the outside wall of the motor base 4 in the area of the L-shaped longitudinal holes ~4, downwardly open guide studs 30 (Figure 5) with bores 28 are provided for the pins 7 of the interlocking pockets 5 so that they exactly meet the lock bolts 8 of the lock ring 9 when the container holder 2 is placed on the motor base 4. As shown in Figures6 and 7~ the lock ring 9 can be moved in direction C or D with the aid of the lock bar ll, which is guided in a longi-tudinal hole (not shown in greater detail) present in the housing wall of the motor base.
In addition to a stud 24, with which it is enclosed in a recess 43 of the lock ring 9, the lock bar 11 also has a lock fork 25 which acts together with the lock rod 26 movable in a perpendicular direction in the motor base 4 and in which, in turn, the studs 38 of the operating switch engage. When the lock ring 9 is in the position shown in Figure 7, i.e., when the holder 2 is locked by the bolts 8 and the lock bolt supports 12 after the lock bar 11 is moved in direction C, the lock rod 26 can be moved vertically upward in direction E by rotating the operating switch 27 in direction G, so that the lock rod 26 enters into the recess 29 of the lock fork 25. Only in this posi-tion (Figure 7) can the operating switch 27 be rotated and the motor be turned on to drive the wing blades. If the operating switch 27 is rotated in the opposite direction G, the lock rod 26 falls vertically downward against the direction E, so that the lock bar 11 can be moved in direction D. After the lock bar 11 is moved in direction D (Figure 6), the lock rod 26 is locked, because one end thereof abuts the shoulder 23, which renders the operating switch 27 incapable of rotating.
The exemplary embodiment of the holder 2 shown in Figure 3 is not only suited to hold a lid on a container and lock both parts (10 and 1) to the motor base 4, but rather the container 1 with lid 10 can be exchanged for a mixing unit, a meat grinder or a citrus press. These auxiliary units only require a base portion which corresponds in diameter d and height h (Figure 3) to the illu-strated container 1 and lid 10. Because the holder 2 is provided on its upper side with an opening o, parts of the auxiliary units can be formed in such a manner that they project far beyond the holder 2. Finally, container holders can be provided whose dimensions h and o are such that, for example with a mixing unit, it is impossible for the user to reach the rotating blades with the hand or fingers from the top through the opening. The inner surfaces of the holder are effectively provided with ribs, cams or the like (not shown), which reliably prevent the holder or the auxiliary unit from rotating about the blade axis when the motor is turned on. The electrical control portion in the motor base may also be provided with a known braking device, thus when the motor is turned off, the control circuit of a braking device is closed so that the motor instantaneously comes to a halt. Instead of an electrically operat-~6Si~3 ing braking clevice, the lock bar 26 can also be coupled with a mechanically operating motor brake. ~s soon as the lock bar moves opposite the arrow di-rection E, i.e., when the motor is turned off, it presses a brake shoe (not shown) against the motor shaft.
Claims (7)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Electric household blender having a mountable apparatus in which cutting tools driven by a motor rotate, and having a motor base with an elec-tric switch, characterized in that the apparatus is held by a holder with lock bolt supports which can be placed on the motor base and locked thereon by means of a lock ring with lock bolts, for which purpose the lock ring which is held and guided in the motor base can be rotated about a longitudinal axis of the motor base and can be moved by a lock bar, cooperates with a lock rod which is longitudinally movable in the motor base and which, in turn, releases or locks the operating switch for turning the motor on and off depending on the position of the lock ring.
2. Electric household blender according to claim 1, characterized in that the motor base and holder have associated guide surfaces whereby the holder has interlocking openings or slots in the area of the guide surfaces as lock bolt supports, in which openings or slots lock bolts or studs engage, said lock bolts or studs being mounted on the movable lock ring and supported and guided in openings in the housing of the motor base.
3. Electric household blender according to claim 2, characterized in that the holder has at least two interlocking pockets provided with guide surfaces uniformly distributed about its circumference, whereby each interlock-ing pocket is provided with a lock groove or lock slot and the interlocking pockets are enclosed in corresponding depressions equipped with guide surfaces, which depressions are provided on the motor base.
4. Electric household blender according to claim 1, 2 or 3, character-ized in that the lock ring, which is rotatable in the motor base and can be moved perpendicularly to the plane of rotation has at least two horizontally extend-ing studs or bolts which come into contact with pins arranged on the holder next to the interlocking pockets in the area of the lock bolt supports when the holder is placed on the motor base and said pins move the lock bolts together with the lock ring into a position in front of the lock bolt supports.
5. Electric household blender according to claim 1, 2 or 3, characteriz-ed in that openings or slots for the bolts of the lock ring are formed in the shape of L's in the housing of the motor base and the lock bolts lie against studs, cams or pins on the container holder in their unlocked position, which studs, cams or pins, in turn, pass through openings provided in guide studs on the motor base.
6. Electric household blender according to claim 1, 2 or 3, characteriz-ed in that the lock ring has a recess which encloses the stud of a lock bar movably mounted on the housing of the motor base, by means of which the lock ring can be rotated for the purpose of locking or unlocking.
7. Electric household blender according to claim 1, 2 or 3, characteriz-ed in that the lock bar has a recess into which the end of the lock rod, which is vertically movably mounted in the motor base enters when the lock ring is in the locking position, whereby a shoulder is provided on the lock rod which cooperates with a stud on the operating switch and moves the lock rod as the operating switch is rotated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000364760A CA1116593A (en) | 1978-04-19 | 1980-11-14 | Electric household blender |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2817044A DE2817044C3 (en) | 1978-04-19 | 1978-04-19 | Electric household mixer chopper |
| DEP2817044.7 | 1978-04-19 | ||
| CA000325910A CA1118408A (en) | 1978-04-19 | 1979-04-19 | Safety lock-switch system for household blenders |
| CA000364760A CA1116593A (en) | 1978-04-19 | 1980-11-14 | Electric household blender |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1116593A true CA1116593A (en) | 1982-01-19 |
Family
ID=27166195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000364760A Expired CA1116593A (en) | 1978-04-19 | 1980-11-14 | Electric household blender |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1116593A (en) |
-
1980
- 1980-11-14 CA CA000364760A patent/CA1116593A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |