NZ756042B2 - Vacuum blender - Google Patents
Vacuum blender Download PDFInfo
- Publication number
- NZ756042B2 NZ756042B2 NZ756042A NZ75604218A NZ756042B2 NZ 756042 B2 NZ756042 B2 NZ 756042B2 NZ 756042 A NZ756042 A NZ 756042A NZ 75604218 A NZ75604218 A NZ 75604218A NZ 756042 B2 NZ756042 B2 NZ 756042B2
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- NZ
- New Zealand
- Prior art keywords
- vessel
- vacuum
- conduit
- motor
- vacuum pump
- Prior art date
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Abstract
vacuum blender having a vessel, a motor base containing a motor having a motor drive shaft, the motor base containing a vacuum pump, the motor drive shaft adapted to drive the vacuum pump, a blade holder having a blade with a blade shaft for engaging the motor drive shaft, and a fan connected to the motor drive shaft. The blender includes a conduit system for the passage of air from the vessel to the ambient environment. The fan and blade are capable of being selectively actuated using a gear or clutch system, preferably operated by firmware. The vacuum pump may also be selectively actuated using a solenoid to disengage the motor drive shaft from the vacuum pump or by closing the conduit system from the vessel to the vacuum pump. The invention is capable of evacuating air from the vessel before blending of the food contents occurs. This solves the issue of the food oxidising when blended, and allows greater end user control of the oxidation process. he motor drive shaft. The blender includes a conduit system for the passage of air from the vessel to the ambient environment. The fan and blade are capable of being selectively actuated using a gear or clutch system, preferably operated by firmware. The vacuum pump may also be selectively actuated using a solenoid to disengage the motor drive shaft from the vacuum pump or by closing the conduit system from the vessel to the vacuum pump. The invention is capable of evacuating air from the vessel before blending of the food contents occurs. This solves the issue of the food oxidising when blended, and allows greater end user control of the oxidation process.
Description
VACUUM BLENDER
CROSS-REFERENCE TO D APPLICATIONS
This application claims priority to United States Patent Application
,933 filed on September 13, 2017, which claims a priority to and benefit of United
States Patent Application No. 15/633,383, filed on June 26, 2017, which claims a priority to
and benefit of United States Patent Application No. 15/457,874, filed on March 13, 2017,
which claims priority to and benefit of United States Provisional Patent Application No.
62/456,920, filed on February 9, 2017, the contents of each are incorporated by reference in
their entireties.
FIELD OF THE INVENTION
The present invention relates to household and kitchen appliances. In
particular, the invention s to vacuum blenders, specifically relating to nutrient extractor
vacuum blenders.
OUND OF THE INVENTION
Kitchen blenders have a motor base to which a vessel containing a
combination of food items and liquid is mounted on top of the motor base Such blenders
are defined by the orientation of the vessel when attached to the motor base. Therefore, it is
important to properly define the top and bottom of such vessels. The top of such s are
defined as the end of the vessel at which the blended food and/or liquid enters the vessel for
2018/017435
blending. The bottom of the vessel is the end of the vessel opposite the top of the vessel.
The functionality of the top and bottom of the vessel is different, depending upon the type
of kitchen r involved,
In traditional kitchen blenders, a blade holder, in which a rotary blade is
centrally integrated, is secured to the bottom of the vessel and a cap seals the top of the vessel
to prevent the contents from splashing out of the vessel during blending. The blade of the
vessel has a shaft that is capable of engaging the shaft of the motor contained in the motor
base in a manner to permit activation of the blade.
Vacuum blenders are a subcategory of kitchen blenders, which remove the
ambient air from the mixing vessel of the blender. The removal ofthe t air is desired
because the air oxidizes nutritionally valuable antioxidant vitamins and nutrients when these
bioactive ingredients are released during blending from the protective cell walls in which
they are located. The health benefits of using the blender to release idants will be
increased if the nutritional value of such antioxidants can be preserved by removing the air
from the vessel.
Other benefits of vacuum blenders include the l of s and
g from the drink. When blended, the air is mixed into the drink. The gases added to
the drink can cause discomfort to the consumer. The gases also make it more difficult to
mix in protein powder to drinks. Foaming occurs when n powder supplements are
added to the mix, which has been known to cause additional strain on the motor, which can
shorten the life of the blender. Vacuum blenders have also been shown to chop the
ingredients into a finer consistency, which is a goal of making a nutritious smoothie.
2018/017435
Vacuum blenders typically have a valve in the top of the cap at the top of the
vessel, which is secured to a passage, such as a hose, that is connected to a separate n
pump, which permits the removal of the air in the vessel. These types of vacuum blenders
require costly structural additions to the r to achieve these s, such as the addition
of a vacuum pump. Generally, more material resources make them more costly to
manufacture. Many vacuum blenders increase the footprint of the blender to accommodate
the additional apparatus required to evacuate the . The additional bulkiness requires
larger packaging and increases the weight, thereby limiting the number that can be shipped
and stored within a defined space. Heavier and bulkier items are generally more costly to
ship. Many such vacuum blenders require more counter space, which is a disadvantage for
many consumers. A typical vacuum blender having a separate vacuum pump can be found
in United States Publication No. 173105 A1.
The configuration of a traditional vacuum blender described above does not
work for a certain subset of blenders called nutrient extractors, or sometimes called single
serve blenders. In such blenders, the vessel configuration is inverted. The top of the vessel
does not have a cap. Instead, a blade holder is attached to the top of the vessel. The bottom
of the vessel is completed closed and is fully integrated into the sides ofthe vessel. The food
contents are placed inside the vessel, then the blade holder is attached to the top of the vessel
thereby g the food contents inside for blending. The vessel and blade holder are
inverted ing in the top becoming the bottom so that the blade holder can be placed on
to the motor base to permit activation of the blade. There is no cap in such a configuration
to which a vacuum connection can be made. Since the bottom of such a nutrient extractor
vessel is continuous with the walls of the vessel, a valve for a vacuuming tube cannot be
WO 48418
incorporated into the bottom without compromising the integrity of the bottom of the vessel,
which could result in leakage through the valve or leakage about the seal around the valve
when the vessel is re—inverted after ng.
For kitchen blenders having the inverted configuration of a nutrient extractor,
it is difficult to add the vacuum function. The problem arises with evacuating the air from
nutrient extractors because the air in the vessel is located above the water line in the ed
bottom of the vessel, which is the top of the vessel when the vessel is inverted for blending.
It is comparable to an air pocket in a capsized ship. The present invention is able to evacuate
the air from this sealed space without drilling a hole through the bottom to attach a vacuum
pump. The t invention also avoids any substantial increase in the footprint of the
blender, incorporating all inventive features within the ng spaces within the nutrient
extraction blender, and taking advantage of the existing motor in such blenders to create the
suction needed to evacuate the vessel.
Vacuum blenders with the opening for accessing the contents of the vessel
on top can also t from the present ion. Such conventional vacuum blenders still
have a separate vacuum pump separate from the motor that drives the blade. The vacuum
pump is sometimes located within the motor base g such as in Korean Patent No. 10-
1441093. In other vacuum blenders, the vacuum pump is located separately from the motor
base housing. But in either case, a separate motor drive is required to for evacuation of the
vessel and blending with the blade. The present invention eliminates the need for a separate
vacuum pump in a vacuum blender.
BRIEF DESCRIPTION OF THE DRAWINGS
is a perspective view of an assembled blender in accordance with an
embodiment of the present invention.
is a perspective view of a vessel in ance with an embodiment
of the present invention.
is a perspective view of a vessel with a blade holder ed in
accordance with an embodiment of the present ion.
is a top perspective view of a blade holder in accordance with an
embodiment of the t invention.
is a top perspective view a motor base in accordance with an
embodiment of the t invention.
is a bottom perspective internal view of the motor base in accordance
with an embodiment of the present invention.
is a bottom perspective internal view of the motor base in accordance
with an embodiment of the present invention.
is a side view of the operation of the gravity gate in accordance with
an embodiment of the present invention where the cup is oriented in an inverted position.
is a side view of the operation of the gravity gate in accordance with
an embodiment of the present invention where the cup is oriented in a drinking position.
is a side view of the operation of the ball gate in ance with an
embodiment of the present invention where the cup is oriented in an inverted position.
is a side view of the ion of the ball gate in accordance with an
embodiment of the present invention where the cup is oriented in a drinking position.
is a cross sectional view of the motor base in accordance with an
2018/017435
embodiment of the present invention.
is an ed view of internal components spring clutch in
accordance with an embodiment of the present invention.
is a perspective view of internal components of spring clutch in
accordance with an embodiment of the present invention.
is a perspective view of an led spring clutch in accordance
with an embodiment of the present invention.
A is a dissected perspective view of an electromechanical clutch in
accordance with an embodiment of the present invention.
B is an exploded view of a gear coupling in accordance with an
embodiment of the present invention.
is an ed perspective view of a top loading blender vessel in
accordance with an embodiment of the present invention.
is an exploded view of an electromagnetic clutch in accordance with
an embodiment of the present invention.
is a cross sectional perspective view of a gear clutch in accordance
with an embodiment of the present invention.
is a cross sectional view of an electromagnetic clutch in accordance
with an embodiment of the present invention.
is a cross sectional View of an electromagnetic clutch in accordance
with an embodiment of the t invention.
is a cross nal view of an omagnetic clutch in accordance
with an embodiment of the present invention.
is a cross sectional view of an electromagnetic clutch in ance
with an embodiment of the present invention.
is a cross sectional View of an electromagnetic clutch in accordance
with an embodiment of the present invention.
is a cross sectional View of an electromagnetic clutch in accordance
with an embodiment of the present invention.
is a cross sectional View of an electromagnetic clutch in accordance
with an embodiment of the present ion.
is a dissected view of a planetary screw in accordance with an
embodiment of the present invention.
is a dissected View of a ball screw in accordance with an embodiment
of the present invention.
is a cross sectional View of the drive shaft and vacuum pump located
in the motor base in accordance with an embodiment of the present invention.
is a bottom perspective al View ofvacuum pump and drive shaft
gear coupling in the motor base in ance with an embodiment of the present invention.
is a bottom ctive internal view ofvacuum pump and drive shaft
gear coupling in the motor base in accordance with an embodiment of the present invention.
is a bottom perspective internal view ofvacuum pump and drive shaft
gear coupling in the motor base in accordance with an ment of the present invention.
is a bottom ctive internal View ofvacuum pump and drive shaft
gear coupling in the motor base in accordance with an embodiment of the present invention.
is cross sectional view of the operation of the coupling of gears of
the vacuum pump and drive shaft in accordance with an embodiment of the present
invention.
is cross sectional view of the operation of the coupling of gears of
the vacuum pump and drive shaft in accordance with an embodiment of the present
invention.
is cross sectional view of the operation of the electromagnetic gate
of the vacuum pump in accordance with an embodiment of the t invention.
is cross sectional view of the operation of the electromagnetic gate
of the vacuum pump in accordance with an embodiment of the present invention.
is cross sectional view of the vacuum pump in accordance with an
embodiment of the present invention.
is a cross sectional perspective view of the vacuum pump in
ance with an embodiment of the t invention.
is cross nal view of the vacuum pump in ance with an
embodiment of the present invention.
is a cross sectional perspective view of the vacuum pump in
accordance with an embodiment of the present invention.
is a cross sectional perspective view of the motor base in ance
with an embodiment of the present invention.
is a bottom perspective internal view of the motor base with a cross
sectional view of the vacuum pump in accordance with an embodiment of the present
invention.
is a cross sectional perspective view of the motor base in accordance
WO 48418
with an embodiment of the present invention.
is a bottom ctive internal view of the motor base with a cross
sectional view of the vacuum pump in accordance with an embodiment of the present
invention.
DETAILED DESCRIPTION OF THE INVENTION
The Invention’s Conduit System
As shown in Figures 1 to 3, a preferred embodiment of the invention is
comprised of a blender 10 having a vessel 12 to which the blade holder 14 is attached to the
top of the vessel 12 and the bottom 16 of the vessel is integral with the sidewalls 18 of the
vessel 12. The blade holder 14 is e of being detachably secured to a motor housing
. The invention has a system of conduits from the bottom of the inverted vessel 12 to the
bottom 21 of the motor housing 20. In the red ment, the vessel has at least one
hollow vessel conduit or tube 22 formed in the wall of the vessel. The vessel conduit 22 has
an opening 24 at the top of the vessel 12 as shown in Figure 3. This opening has a first
coupling 26 that can engage a second coupling 28 located in the blade holder 14.
The vessel conduit 22 also has an opening or aperture 36 in proximity to the
bottom 16 of the vessel 12. The blade holder 14 has a plate 30 to which a rotatory blade 32
is centrally secured. The plate 30 has a first side 34 and a second side 36. The blade 32
protrudes from the first side 34 of the plate 30. The second side 36 of the plate 30 faces the
motor housing 20 when mounted operationally to the motor housing 20. As shown in Figure
4, the second coupling 28 is located on the first side 34 the plate 30 and passes through the
plate 30. On the underside of the plate 30, the second coupling 28 is capable of engaging a
third coupling 40 located on the motor base 20.
The vessel 12 can have ridges 23 formed in the walls of the vessel 12. The
ridges 23 create turbulence when they protrude from the or side of the sidewall 18 of
the vessel 12, and can provide better griping of the vessel 12 when the ridges 23 de on
the exterior of the sidewall 18 of the vessel. Whether the ridges 23 are protrude on the inside
or the outside of the vessel or both side, the vessel conduit 22 can be formed within one or
more of the ridges 23.
The motor base 20 has a housing 42 in which a motor 44 is located. The
housing contains at least the motor 44, a motor drive shaft 78 that engages a shaft 48 of the
blade 32 via the clutch or gear system 120, and a fan 50 at the bottom of the motor. The
blades 52 of the fan 50 are oriented to expel air from the motor housing 20 to cool the motor
44. The side of the fan 50 that draws air from inside the motor housing 20 is defined as an
intake side 54. As shown in Figures 5 and 10, the third coupling 40 in the motor base 20 is
connected to a ding conduit 56 that passes through the interior of the housing of the
motor base 20,
The Invention’s Valve System
The descending conduit 56 is connected to a three way valve 58 shown in
Figures 6 and 7. The three way valve 58 has an inlet coupling 60, an t coupling 62, a
vacuum coupling 64, and a flow switch 66. The flow switch 66 can be manually operated
by positioning the three way valve 58 so that the switch 66 protrudes from the motor housing
. This is collectively defined as a three way valve system 59. The preferable method of
lling the flow switch 66 is by an electro—mechanical device, such as a solenoid, that is
on a timer or is controlled by firmware in a microcontroller. Controlling the flow switch 66
by using a mechanical timer, or by using an electromechanical device operated by a
microcontroller, is well known in the art of flow es.
The descending conduit 56 is connected to the inlet coupling 60 of the three
way valve 58. The exhaust coupling 62 is connected to an exhaust conduit 68, which vents
to the outside of the motor base housing 20. As shown in Figure 6 and 7, the vacuum
coupling 64 is connected to a vacuum conduit 70, which is substantially perpendicular to the
inlet conduit 60 and exhaust 64 conduit. The vacuum conduit 70 has a terminal end 72.
The terminal end 72 is positioned on the intake side 54 of the fan 50 in the motor base 20 in
an operational position so that the fan 50 sucks air from the terminal end 72 of the vacuum
conduit 70. This s a gas Venturi effect causing the air in the vessel 12 to be sucked
out through the system of conduits Via the vessel conduit 22 and the descending conduit 56
to be expelled through the exhaust t 68. The flow switch is in the open position after
activation of the fan for long enough to expel the gas from the vessel. At that point, the
blade is engaged by the motor to begin the blending process.
In a preferred embodiment, the descending, vacuum, and exhaust conduits 56,
70, 68 have a larger diameter than the ponding inlet, vacuum and exhaust couplings
60, 62, 64 of the three way valve 58. This creates a Venturi effect by forcing air to travel at
a higher speed through the er three way valve 58. The higher speed through the
narrower valve 58 lowers the pressures in the valve. The lower pressure in such a Venturi
valve draws air from the higher pressure descending t 56 until all air from the chamber
has been vacuumed out.
2018/017435
A Venturi valve can also be constructed by simply having a narrower e
at any point in the conduit system. For example, the valve system would also work by
joining the descending conduit 56 to the exhaust conduit 68 with a section of conduit that is
narrower in diameter than both. Preferrably, a valve would be added at any point to turn on
and off the evacuation s. The exhaust conduit would terminate on the intake side 54
of the fan 50 in order to begin the draw of air through the system to set up the pressure
differential for the Venturi effect. The disadvantage of this design is that any liquids
inadvertently sucked through the conduit system would run the risk of hitting the fan and
being projected back up on to the ic motor, which could cause a short circuit.
The vessel 12 can be formed with one or more vessel conduits 22. Each
vessel t 22 can be operationally connected to its own valve system 59. The advantage
of a plurality of such vessel conduits 22 with each having a dedicated valve system 59 is that
it will decrease the time required to evacuate the vessel 12 because more than conduit 22 is
simultaneously evacuating the vessel 22. Another advantage is if one conduit 22 becomes
clogged, the other conduit 22 is still evacuating the vessel 12. The disadvantage is the
additional cost and space constraints within the g. The ial clogging of the vessel
conduit 22 can be addressed by providing a plurality of vessel conduits 22 that are ted
to a single conduit system in the motor base 20, which connects to a single valve system 22.
Such an embodiment will not necessarily evacuate the vessel faster than a single vessel
conduit 22, but it will insure redundancy such that if a vessel conduit 22 becomes clogged,
the remaining vessel conduits 22 will continue to evacuate the vessel 12.
The conduit system has been described as internal to the vessel 12, blade
holder 14, and motor housing 20. But it is within the scope of the invention to place all or
part of the conduit system on the external side of the vessel 12, blade holder 14, and motor
g 20 or any effective combination thereof.
The Gear Mechanism for ing the Blade Separately From the Fan
As shown in Figure 10, the invention has a gear mechanism 120 in the motor
base 20 to permit the motor to operate the fan without rotating the blade. The gear
mechanism 120 can be a clutch system or an axial gear system. The clutch system can be a
mechanical, electromechanical, or electromagnetical clutch system as described below. The
gear mechanism is important to the invention because the evacuation of the air from the
vessel must be completed before the blade is activated. Otherwise, the vessel t would
be sucking fluid and food particles out of the vessel along with air. ore, it is important
to have a gear mechanism that allows the motor to te the fan, but not the blade, when
the valve system is in the open position.
The gear mechanism delaying activation of the timer can be mechanical in
nature. Such mechanical gears are well known in the art of timers. Electromechanical timers
can also control the closing of the valve 58 and the tion of the blade shaft 74. But
preferably, the timing can be controlled by firmware located in a microcontroller. The delay
before the flow switch 58 is closed and the blade shaft 74 is engaged will depend upon the
length of time required to evacuate the vessel 12, taking into consideration such factors as
the power of the motor, the size of the vessel 12, and the diameter of the conduits and
couplings in the system.
The Spring Clutch Embodiment
As shown in Figures 11 to 13, a spring clutch system 76 can be used to couple
the motor shaft 78 (also known as an input shaft) to the blade shaft 80 (also known as a load
shaft). The location of the spring clutch system is shown in Figure 13 with the details of the
spring clutch system shown in Figures 14, 15, and 16. Using a conventional spring clutch
system 76, the motor shaft 78 is coupled to the blade shaft 80 when a solenoid 82 is ted
to disengage a wrap spring 84 from a stop collar 86. This frees the stop collar 86, which is
connected to the clutch spring 88 via the control tang 90. When this happens, the clutch
spring 88 tightens, thereby ng the motor shaft 78 and blade shaft 80 together. When
power to the solenoid 82 is turned off, the id arm retracts thereby permitting the wrap
spring 84 to age the stop collar 86 thereby disengaging the blade shaft 80 from the
motor shaft 78. The clutch spring 88 is contained within clutch housing 92.
Modern blenders operate at significant rotational speeds of up to 20,000 to
,000 revolutions per minute (RPM). Spring clutches are y employed in lower RPM
environments. But blenders are a special case because the load is generally reduced as a
function of time. In a blender, the spring clutch 76 is not likely to be under high load at high
RPM for a significant period of time given that the load is decreasing as the ingredients in
the vessel 12 are converted from solid to substantially liquid form by the blade. This reduces
stresses on the spring clutch.
{00713 To increase spring clutch performance, it is preferable that the motor shaft 78
come to a stop, or at least be reduced to a speed approaching zero RPM, before the clutch
engages the motor and blade shafts 78, 80. To further increase spring clutch 88 performance,
the engagement ns of the motor shaft 78, the blade shaft 80 and/or the clutch spring
88, or combinations thereof, can be coated with tungsten carbide (WC), aluminum oxide
WO 48418
(A1203), chromium nitride (CrN), um diboride (TiBz), silicon dioxide (SiOz), and/or
combinations thereof. These gs provide a harder surface for engagement. There are
also various bonding material powders available for increasing the performance of the clutch
system such as Y, NiCrAl, NiCr, and Ti, which may be suspended in a liquid medium
and then cold sprayed or brushed onto the plate, or they may be applied by a high velocity
oxygen fuel (HVOF) or air fuel (AF) thermal spray procedure. Cerarnie coatings can also be
used made from a mixture of copper, iren, tin bronze, silicon e, r graphite.
Organic coatings are also suitable and are typically made from phenolic: resins, friction
moditiere like metallic. powder or metal oxides, and compounded rubber. All of theae
bonding materials and coatings reduce slippage of the eluteli during operation by inereasing
the frictional coefficient at the points of contact of the clutch system with the drive Shaft of
the blade.
Rotaiv Gear Clutch Embodiments
As shown in Figure 14B, a rotary gear mechanism 94 can also couple the
motor shaft to the blade shaft using an electromechanical clutch. In one such ment
of a rotary gear mechanism, a male gear 96 secured to the motor shaft 78 is capable of
engaging a complementary female gear 98 located secured to the blade shaft 80. The
engagement of the male and female gears 96, 98 can be controlled using conventional
electromechanical clutches or solenoids to provide linear movement of the motor shaft 78.
Such linear movement of the motor shaft can be accomplished by a oping drive shaft.
Such telescoping drive shafts can be controlled by a spring loaded solenoid, rack and pinion
system, or screw drive system, some es of which are discussed below.
2018/017435
A telescoping drive shaft can have an internal member having threads about
the ference of the member and an outer sheath having complimentary grooves for
receiving the threads. The outer sheath can be biased by a spring in the contracted position
and engaged by a solenoid controlled by firmware sending a signal from a d t
board (PCB) 95 when it is desired for the rotary gear mechanism 94 to engage the blade shaft
gear 98. PCB’ s are found within many blenders and used for controlling the blending cycle.
Or the electromagnetic clutch can couple the motor and blade shafts by sending a signal from
a simple on and off switch. It is preferable that after the motor 44 has been activated to
evacuate the vessel 12 using the valve 58, the motor should be reduced to zero RPM before
the clutch s the shafts. This reduces stresses on the rotary gear mechanism 94. In
fact, it is better for all gear and clutch systems described herein if the RPM is reduced to
zero before engaging the blade drive shaft.
An Electromagnetic Clutch Embodiment
Another clutch mechanism that can be used with the invention is an
omagnetic clutch 100 as shown in Figure 14A. The electromagnetic clutch 100 has a
rotor 102 to which the motor shaft 78 is secured within. An electric coil 104 is radially
positioned about the rotor 102. In the present invention, the motor 44 is positioned below
the electromagnetic clutch 100, which means the ic coil 104 is above the motor 44.
Above the electric coil 104 is an armature 106, which is secured to an output gear 108. The
output gear 108 is able to engage a blade shaft 24 at the bottom of the blade holder 14.
Springs 112 bias the armature 106 above the electric coil 104. At least one gap 1 14 is located
between the electric coil 104 and the armature 10 in which a magnetic flux is created when
power is delivered to the electric coil 104. The flux attracts the armature 106 to the rotor
102 thereby magnetically securing the armature 106 and the rotor 102 together, which
transfers the rotary motion of the motor shaft 78 to the blade shaft 24. Such an
electromagnetic clutch 100 can be controlled by the blender’s PCB 95 by turning on and off
power to the coil 104. Improved performance of the electromagnetic clutch 100 can also be
achieved using the same coatings and bonding powders described with respect to the use of
a spring clutch 76 in the invention. Such materials can be applied to the armature 106 and/or
the rotor 102 at the surface interface between the armature 106 and rotor 102.
Electromagnetic Clutch Embodiments Using Bar Armatures
Figures 16 to 24, show variations on a particular electromagnetic clutch
system, which can be used with the invention. Figure 16 lly shows the conventional
blade holder having a blade 32 with a standard blade coupling 124. But rather than the blade
ng engaging the motor drive shaft 78 directly, the blade coupling 124 s an upper
terminal end 128 of a clutch shaft 126. An upper portion ofthe clutch shaft 126 is surrounded
by a clutch housing 132. A lower terminal end 130 of the clutch shaft 126 engages the motor
drive shaft 78, which is driven by motor 44. The motor drive shaft 78 also spins fan 50.
Electromagnetic coil 134 surrounds the lower portion of the clutch shaft 126 in which motor
shaft 78 is received as shown in Figures 17 to 24. The motor shaft 78 is specially adapted
with at least one, but preferably a plurality of e chambers 136 in which a magnetic or
magnetizable bar armature 138 is mounted in each storage r 136 using a spring
mechanism 140.
The spring ism 140 can be a coiled spring, a leaf spring or any other
resilient mechanism capable of g the bar armatures 138 within the e chambers
136. When the bar armatures 138 are held within the storage chambers 136 by the spring
mechanisms 140, then the motor shaft 78 will spend the fan 50 without spinning the blade
32 as shown in Figures 17 and 19. During this phase, the vessel 12 can be evacuated. When
the coil 134 is energized, a portion of each bar armature 138 is drawn into a clutch chamber
141 on the clutch shaft 126 with a portion of each bar armature remaining in its storage
chamber 136 as shown in Figures 18 and 20.
The clutch chambers 140 can be bigger than the storage chambers 136 so that
a storage chamber 136 is usually facing a clutch chamber 141. As a consequence, when a
bar armature 138 is drawn into a clutch r 141, the drive shaft 78 will spin the bar
armature 138 until it hits a side wall of the clutch chamber 141, at which point the clutch
shaft 126 will be fully engaged. In this fully engaged position, the drive shaft 78 is joined
to the clutch shaft 126 in order to permit the blade 32 to rotate. If the magnetic attraction is
strong enough, movement of the blade 32 may occur without onal slippage of the bar
armatures 138 against the side walls of the clutch rs 140. The electromagnetic coil
134 can be lled by programming in a PCB 95 to activate the coil 134 after a
predetermined time has lapsed, y 10 to 20 s, during which the vessel 12 is
evacuated before the blade is engaged.
In Figures 17 and 18 display an embodiment in which the spring mechanism
140 connects the bar armature 138 to a back wall 142 of the storage chamber 136. The
weakness of this design is that over time, the spring mechanism 140 may deform due to
excess extension to the point that it does not fully t if the spring mechanism 140 is not
stiff enough. An alternative design is shown in Figures 19 and 20 in which a flange 144
extends from each end of the bar armature 138. The storage chambers 136 have a lip 178
on each end that oppose the corresponding flange 144. The spring mechanism 140 is
ed between the flange 144 and the lip 178. This embodiment permits the spring
mechanism 138 to be under compression rather than extension when the electromagnet 134
is energized as shown in Figure 20. This ment provides better biasing forces to keep
the bar armature 138 in the storage chamber 136 when the electromagnet 134 is turned off
as shown in Figure 19.
Figures 21 and 22 display an ment in which the storage chambers 136
are not necessary. In this embodiment, the bar armatures 138 are secured to the top of the
motor drive shaft 78. Each bar armature 138 has an upper portion 148 and a lower portion
150. To join the upper and lower portions 148, 150 together, a leaf spring 152, or equivalent
resilient material, is inserted into, or secured to, the upper portion 148 and lower portion 150
of the bar armature 138. The clutch shaft 126 has angled recesses 154 for receiving the
upper portion 148 of the bar armature 138. When the electromagnet 134 is not energized,
the bar armatures 138 are in the vertical position as shown in Figure 21 in which the bar
res 138 do not engage the clutch shaft 126. In this position, only the fan 40 and not
the blade 32 rotate when the motor 44 is activated. When the electromagnet 134 is energized,
the upper portion 148 of the bar armatures 138 bend to come into t with the angled
recesses 154 of the clutch shaft 126 as shown in Figure 22 thereby magnetically ting
the motor shaft 78 to the clutch shaft 126. In this position, both the fan 40 and the blade 32
rotate when the motor 44 is activated. As with other embodiments, the power to the
electromagnet 134 can be controlled by a PCB 95 or can be controlled by manual switches.
Figures 23 and 24 illustrate an embodiment that is a variation on the
embodiment in Figures 19 and 20 in that the polarity of the bar armature has been reversed
so that the omagnet 134 repels the bar armature 138 as shown in Figure 24. This
embodiment also requires the reversal of the attachment points of the spring mechanism so
the spring mechanism is attached to the clutch chamber 141 rather than the storage chamber
136. As a result, the electromagnet 134 when activated repels the bar armature 138 into the
storage chamber 136 as shown in Figure 24, thereby engaging the clutch shaft 126 to operate
the blade 32.
Telescoping Axial Screw Embodiments of Gear System
There is another category of mechanisms that can be used to selectively
engage the blade shaft 124. This other ry es gear systems that are capable of
telescoping the motor shaft 78 upward and downward just enough to engage and disengage
the blade shaft 124. The telescoping of the motor shaft 78 can be lished by various
gear systems such as the planetary roller screw 156 shown in Figure 25 in which a portion
of the motor shaft 78 is threaded to serve as the screw shaft, which is surrounded by the
planetary screws 158 contained within a planetary housing 160. Planetary roller screws are
described in United States Patent No. 2,683,379 and orated by reference. By mounting
the planetary housing 160 in a stationary position, the motor or screw shaft can move axially
to engage and disengage the blade shaft 124. Planetary roller screw systems are generally
considered to be more expensive design choices.
A ball screw system 162 as shown Figure 26 is a preferred gear system for
axial motion from a cost perspective. The ball screw system is comprised of a ball screw
housing 164, which surrounds the threaded motor shaft 78, and the recirculating ball gs
166. Such a ball screw system is described in United States Patent No. 5,337,627 and is
incorporated by reference. By mounting the ball screw g 160 in a nary position,
the motor shaft 78 can move y to engage and disengage the blade shaft 124.
Special Embodiments of the Evacuation Aperture
In the vessel 12 having the inverted design shown in Figure 1, 2, 3, 8, 9, and
, the vessel conduit 22 has an evacuation aperture 36 in proximity to the bottom 16 of the
vessel 12, which as usly explained becomes the top of the vessel 12 when inverted to
be mounted on the motor base 20. In the ments shown Figures 8 and 9, the aperture
36 includes a splash shield 106 having a plurality perforations formed therein. This
configuration permits removal of the air from the vessel 12 during the tion phase
while limiting food particles from entering the vessel conduit 22 during the blending phase.
The splash shield 106 can be integrally formed with the vessel 12 or it can be made as a
stopper that can ben d to flood the conduit 22 during cleaning. In that case, the splash
shield 106 can be made of plastic, rubber, silicone, or other suitable kitchen grade material.
The key to the success of the optional splash shield 106 is that the ations allow for air
to be suctioned into the vessel conduit while limiting food particles from entering the conduit
22 during blending.
The invention can also have an optional gravity gate 108 as shown in Figures
8 and 9. The gravity gate 108 is positioned in proximity to the evacuation aperture 36 in
order for the gate 108 to close the aperture 36. The gravity gate 108 can be located in a
channel 110 adjacent to the vessel t 22. In such a configuration, the gate 108 is
weighted so that it falls to the closed position when the vessel is oriented in the drinking
position as shown in Figure 8B and falls to the open position when the vessel is inverted in
the blending position as shown in Figure 8A. The gate 108 is preferably made of stainless
steel, but can be made of any food grade material of sufficient weight to move in the channel
110 in response to gravity and remain in the desired on until moved. This prevents the
fluid in the blended drink from entering the vessel conduit 22 during drinking, but allows
for removal of air during the evacuation phase.
The gravity gate 108 can also be constructed using a weighted ball 112, such
as stainless steel, within the vessel conduit 22. In this embodiment, the gravity gate 108 is
comprised of a region of the vessel conduit 22, which is tapered toward the conduit aperture
36. The weighted ball 112 has a smaller diameter than the diameter of the vessel conduit 22
so that air can pass by the ball 112 during evacuation of the vessel 12. But in the region in
which the vessel conduit 22 is tapered, the ball 112 has a greater diameter than at least a
portion of the tapered region. In such a configuration, the ball 1 l2 falls to the closed position
when the vessel is oriented in the ng position as shown in Figure 9B and falls to the
open position when the vessel is inverted in the blending position as shown in Figure 9A. A
collar 114, or other ng ure, can be positioned within the vessel conduit 22 so that
the weighted ball 1 12 does not fall the entire length of the t when in the open position.
The sum of the total width of the collar 114 and the diameter of the ball 112 must be less
than the interior diameter of the vessel conduit 22 to permit air to pass by during evacuation.
The gravity gate 108 is not essential to the ion because the vessel conduit 22 can be
rinsed out if food particles enter the vessel conduit 22, but it is useful to prevent clogging
and limit the need for regularly cleaning the vessel conduit 22.
The invention has been described primarily with respect to vessels 12 having
an inverted configuration such as shown in Figure 2. But the ion can employ a
conventional blender vessel 116 as shown in Figure 20. The vessel t 22 can be
incorporated into such a conventional blender vessel 116 have a blade holder 14 removably
secured to the bottom of the blender vessel 116 and a top 122 removably attached to the top
of the vessel 116 as shown in Figure 15. All other elements of the ion can interact
with the conventional blender vessel 116.
Gear Driven Vacuum Pump
An additional benefit of the clutch system 120 is that a vacuum pump 190
can be actuated directly by drive shaft 78, which is driven by motor 44. The clutch system
120 permits the operation of the vacuum pump 190 first, then operation of the blade 32 after
evacuation of the vessel 12 has occurred. This eliminates the need for a second ted
motor to drive the vacuum pump, which is needed in prior art vacuum blenders. The
elimination of the second motor in prior art vacuum pumps is a significant savings in raw
materials and cost. This represents a significant cumulative savings, especially when one
considers that many manufacturers of blenders produce millions of units each year.
The operation of the motor 44 to drive the vacuum pump 190 is shown in
s 27 to 31. The descending conduit 56 is connected to the vacuum conduit 72, which
in turn is connected to the vacuum pump 190. The vacuum pump 190 is in turn connected
to the exhaust t 68. The vacuum pump 190 may be driven by the drive shaft 78 by
means of a gear 191 located on the drive shaft 78. The gear 191 is connected to a gear 192
connected to the vacuum pump 190.
An alternative embodiment of the drive shaft 78 connected to the vacuum
pump is shown in Figure 29. The gear 191 is connected to a chain 193. Chain 193 is also
connected to gear 192. In yet another configuration, gear 191 is ted to an intermediate
gear 194. Gear 194 is connected to gear 195 via a shaft. Gear 195 is connected to chain 193
which in turn is connected to gear 192. Figure 31 show yet another embodiment of the
invention in which gear 191 is connect to gear 194, which in turn is connect to gear 192.
Turning to Figure 32, vacuum pump 190 is shown nt to drive shaft 78.
Gear 194 is ted to a solenoid 196. When the solenoid is in the off position, gear 194
is not engaged to gear 191 and gear 192. Thus, in this position, as motor 44 drives the
rotation of the drive shaft, which in turn drives the rotation of gear 191, gear 191 will not be
able cause the rotation of gear 192. When the solenoid is in the on position as shown in
Figure 33, it engages gear 194 to gear 191 and gear 192. In this position, as motor 44 drives
rotation of drive shaft 78, gear 191 on drive shaft 78 drives the rotation of gear 194 which
in turn drives the rotation of gear 192. Thus, motor 44 drives the vacuum pump when the
solenoid is in the activated phase.
In the embodiments in which gear 191 is ly connected to gear 192
without the use of any intermediate gear 194, the vacuum pressure of the vacuum pump to
vessel 12 may be closed off by use of a valve 197 located in the descending conduit 56 near
the vacuum pump 190. When id 196 is in the off position, valve 197 is open, allowing
the vacuum pump 190 to evacuate the air from vessel 12. When solenoid 196 is in the on
position, valve 197 is closed, the vacuum pump 190 does not suck air from vessel 12.
In yet another embodiment, vacuum pump 190 is ted ly to drive
shaft 78, as shown in Figures 36 to 39. As the motor 44 drives the rotation of the drive shaft
78, which in turn powers the vacuum pump.
In another embodiment of the invention, the vacuum pump 190 may consist
of at least two chambers and two impellers 198 and 199. A terminal end of vacuum conduit
70 is connected to the vacuum pump 190 into the first chamber of the vacuum pump 190. A
second terminal end of vacuum conduit 70 is locate near the blades of the fan 50. As the
motor 44 drives the rotation of the blades of the fan 50, the air is forced into the second
terminal end of vacuum conduit 70, which forces the impeller 198 in the first chamber of the
vacuum pump 190 to rotate. The impeller 198 is connected to a shaft 200 that is also
ted to a second impeller 199 in the second chamber of the vacuum pump 190. The
descending conduit 56 is connected to the vacuum pump 190 into the second chamber of the
vacuum pump 190. The air evacuated from the vessel 12 by the vacuum pump 190 through
the second chamber of the vacuum pump is force out through the exhaust conduit 68. The
air pushed by the fan 50 of the motor base into the first chamber of the vacuum pump 190 is
emitted h a second exhaust conduit 69, which is connect to the first exhaust t
68 to be expelled out to the ambient environment.
Vacuum pump 190 as shown diagrams 40 to 43 is for illustrative purposes.
Vacuum pump 190 may be a vacuum pump using diaphragms or any other types of vacuum
pump.
The foregoing descriptions of a i valve system and vacuum pump 190
are alternative means of evacuating air from the vessel through the conduit system. The
Venturi valve system and vacuum pump 190 can collectively be referred to as evacuation
devices.
The foregoing description of the embodiments of the present invention has
been presented for the purpose of illustration and ption. It is not intended to be
exhaustive or to limit the invention to the e form sed. Many modifications and
variations are possible in light of the above teachings. Those of skill in the art will appreciate
that the various embodiments can be modified using common knowledge and the teachings
herein can be combined together to create other embodiments that still fall within the scope
of the t invention, and such design choices should not be interpreted as causing a
departure from the scope of the present disclosure. It is intended that the scope of the t
invention not be limited by this detailed description, but by the claims and the equivalents
to the claims appended hereto.
Claims (18)
1. A vacuum blender having a vessel, a motor base containing a motor, a motor drive shaft, a blade holder having a blade with a blade shaft for engaging said motor drive shaft, a fan connected to said motor drive shaft, the ement comprising: said motor base containing an evacuation device; a gear system for permitting said motor to te said evacuation device without rotating said blade, said motor drive shaft adapted to power said evacuation device; and a conduit system g an air passage from said vessel to said evacuation device for evacuating air from said .
2. The vacuum blender of Claim 1 in which said gear system is a clutch.
3, The vacuum blender of Claim 1 in which said evacuation device is a vacuum pump.
4. The vacuum blender of Claim 1 in which said conduit system includes a vessel conduit having an open end e of being opened or closed by a gravity gate.
5. The vacuum blender of Claim 1 in which said conduit system includes a vessel conduit having an open end protected by a splash shield.
6. The vacuum blender of Claim 2 in which said gear system is controlled by instructions received from a PCB.
7. The vacuum blender of Claim 3 in which said motor shaft to activate the vacuum pump comprising a gear system which includes a solenoid capable of engaging a first gear located on said motor shaft and a second gear located on said vacuum pump.
8. The vacuum blender of Claim lin which said conduit system includes a ding conduit, said descending conduit includes a valve near said tion device and a solenoid capable of opening and closing said valve.
9. The vacuum blender of Claim 3 in which said conduit system includes a vessel t having an open end capable of being opened or closed by a gravity gate.
10. The vacuum blender of Claim 3 in which said conduit system includes a vessel conduit having an open end protected by a splash shield.
l l. The vacuum blender of Claim 7 in which said solenoid is controlled by instruction received from a PCB.
12. A vacuum blender having a vessel, a motor base containing a motor, a motor drive shaft, a blade holder having a blade with a blade shaft for ng said motor drive shaft, a fan connected to said motor drive shaft, the improvement comprising: said motor base containing a vacuum pump comprised of at least two rs; a first chamber of said vacuum pump connected to a vacuum t located in proximity of said fan; said first chamber of said vacuum pump adapted to be driven by the air expelled by said fan into said vacuum conduit into said first vacuum pump chamber; a second chamber of the said vacuum pump adapted to be driven by said first chamber, a gear system for permitting said motor to activate said vacuum pump to evacuate said vessel without rotating said blade; and a conduit system defining an air passage from said vessel to said second chamber of said vacuum pump for evacuating air from said vessel.
13. The vacuum blender of Claim 12 in which said conduit system includes a descending conduit, said descending conduit includes a valve near the vacuum pump and a id capable of opening and closing said valve.
14. The vacuum blender of Claim 12 in which said conduit system includes a vessel conduit having an open end capable of being opened or closed by a gravity gate.
15. The vacuum r of Claim 12 in which said conduit system includes a vessel conduit having an open end protected by a splash shield.
16. The vacuum blender of Claim 12 in which said first chamber of the vacuum pump further comprises a first impeller located in first said first chamber, said first er is connect to a vacuum shaft, said vacuum shaft is connected to a second impeller located in said second chamber.
17. The vacuum r of Claim 13 in which said solenoid is controlled by instructions received from a PCB.
18. The vacuum blender of Claim 12 wherein said gear system is a clutch. WO 48418 3,335 FEG. 1'
Applications Claiming Priority (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201762456920P | 2017-02-09 | 2017-02-09 | |
US62/456,920 | 2017-02-09 | ||
US15/457,874 US9687111B1 (en) | 2017-02-09 | 2017-03-13 | Vacuum blender |
US15/457,874 | 2017-03-13 | ||
US15/633,383 | 2017-06-26 | ||
US15/633,383 US10055347B1 (en) | 2017-02-09 | 2017-06-26 | Vacuum blender |
US15/703,933 US9924837B1 (en) | 2017-02-09 | 2017-09-13 | Vacuum blender |
US15/703,933 | 2017-09-13 | ||
PCT/US2018/017435 WO2018148418A1 (en) | 2017-02-09 | 2018-02-08 | Vacuum blender |
Publications (2)
Publication Number | Publication Date |
---|---|
NZ756042A NZ756042A (en) | 2021-03-26 |
NZ756042B2 true NZ756042B2 (en) | 2021-06-29 |
Family
ID=
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