U.S. patent application number 10/535067 was filed with the patent office on 2005-11-17 for peristaltic pump.
Invention is credited to Heiduczek, Ralf, Huber, Wolfgang, Rutz, Klaus.
Application Number | 20050254978 10/535067 |
Document ID | / |
Family ID | 29225287 |
Filed Date | 2005-11-17 |
United States Patent
Application |
20050254978 |
Kind Code |
A1 |
Huber, Wolfgang ; et
al. |
November 17, 2005 |
Peristaltic pump
Abstract
A peristaltic pump (1) with a rotating squeeze roller carrier
(12), a squeeze hose (14) partly looping around the squeeze rollers
(13) and a curved contact wall (19) for the squeeze hose (14), the
contact wall (19) being opposite to the effective surface of the
squeeze rollers, whereby the contact wall (19) is movable by way of
a setting lever (5) from a setting (FIG. 5), which enables fitting
with the squeeze hose (14), to a work setting (FIG. 6), pressing
the squeeze hose (14) against the squeeze rollers (13) and whereby
the contact wall (19) forms a part of a pump housing cover (6) at
which the setting lever (5) is positioned to be outwardly pivotable
for displacement of the cover (6).
Inventors: |
Huber, Wolfgang;
(Friedolfing, DE) ; Rutz, Klaus; (Vachendorf,
DE) ; Heiduczek, Ralf; (Bischofswiesen, DE) |
Correspondence
Address: |
ECOLAB INC.
ECOLAB CENTER
370 NORTH WABASHA STREET
ST. PAUL
MN
55102
US
|
Family ID: |
29225287 |
Appl. No.: |
10/535067 |
Filed: |
July 13, 2005 |
PCT Filed: |
November 3, 2003 |
PCT NO: |
PCT/EP03/12214 |
Current U.S.
Class: |
417/477.1 ;
417/474; 417/477.9 |
Current CPC
Class: |
A47L 15/4418 20130101;
F04B 43/1284 20130101; A61M 5/14232 20130101 |
Class at
Publication: |
417/477.1 ;
417/474; 417/477.9 |
International
Class: |
F04B 043/08; F04B
043/12 |
Foreign Application Data
Date |
Code |
Application Number |
Nov 13, 2002 |
DE |
202-17-483.2 |
Claims
1-6. (canceled)
7. A peristaltic pump comprising: a) a plurality of rotating
squeeze rollers; b) a squeeze hose connectably looped around the
squeeze rollers; c) a contact wall; and d) a setting lever; the
contact wall being opposite the squeeze rollers, whereby the
contact wall is connected to and movable by the setting lever,
wherein the squeeze hose is compressed by the squeeze rollers by
moving the setting lever which engages the contact wall against the
squeeze hose.
8. The peristaltic pump according to claim 7, wherein the squeeze
rollers are positioned on a housing base, wherein support detents
for receiving pivot cams of the setting lever are provided on the
housing base.
9. The peristaltic pump according to claim 8, wherein the guides
for receiving slide rails for a housing cover are provided on the
housing base.
10. The peristaltic pump according to claim 8, wherein an end wall
with a detent tongue and with two substantially U-shaped recesses
for passage of the squeeze hose is provided on the housing
base.
11. The peristaltic pump according to claim 7, wherein the setting
lever is constructed as a yoke with a counter detent for detenting
on a detent tongue when the housing is closed.
12. The peristaltic pump according to claim 7, wherein the squeeze
hose is provided on a hose carrier when the housing is open and is
positionable at a housing end wall.
Description
FIELD OF INVENTION
[0001] The invention relates to a peristaltic pump, in particular
for use in dishwashers for the metering of a liquid or pasty
cleaning agent, with a rotating squeeze roller carrier, a squeeze
hose partly looping round the squeeze rollers and a curved contact
wall, which is disposed opposite the effective surface of the
squeeze rollers, for the squeeze hose.
BACKGROUND OF INVENTION
[0002] In one metering pump used by the applicant the squeeze hose
is laid in a block-shaped pump body, which has a substantially
semicircular edge wall, around spring-mounted squeeze rollers on a
squeeze roller carrier, wherein after assembly a cover is
screw-connected over this configuration, one of the
counter-bearings of the squeeze roller carrier being provided in
the cover. In that case it is also known to provide the squeeze
hose bend, which is positioned in the pump, with coupling and
detent heads which are fixed in the region of the housing outer
wall in order to then connect the hoses with, for example, the
dishwasher.
[0003] In the case of another solution employed by the applicant
(e.g. DE 39 4 3 430 A1) the squeeze hose bend is accommodated in a
plastics material yoke which forms the curved contact wall for the
squeeze hose in the use position, wherein the curved wall is
detented with a squeeze hose, which is detented in place, after
being laid around the squeeze hose rollers at the pump body. The
fastening of the squeeze wall in a plane, perpendicular to the
squeeze -roller axis, is also shown in DE-26 57 908-B2 or DD-157
620, whereas U.S. Pat. No. 4,256,442 shows the fasting of the wall
through a parallel leverage with a pivot handle.
[0004] It has proved that the known designs of peristaltic pumps
are still comparatively costly, wherein in the case of the first
solution the exchange, which is necessary from time to time, of the
squeeze hose bend is possible only by screwing on the cover,
whereas in the case of the solution provided with the pivot cover a
disadvantage arises, in particular, in the susceptibility of the
cover to breakage and thus loss of the functional capability of the
pump.
[0005] Peristaltic pumps of-other construction are known from DE 33
26 766-A1 or DE-696 16 336 T2 or from DE-GM 71 47 400, to give only
a few examples.
[0006] The object of the invention is to create a solution by which
a simple exchange of the squeeze hose bend is made possible,
without loosening any screws, and with a robust construction of all
elements.
[0007] According to the invention this object is met with a
peristaltic pump according to claim 1.
[0008] Because of the design of the contact wall movable by way of
a pivot lever an extremely simple squeeze hose positioning is
possible. The pivot lever is opened, wherein the contact wall is
removed from the hose, the hose can be removed or exchanged, the
pivot lever is closed and the contact wall and all other pump
elements are disposed in the working position. At the same time it
is achieved by this design that on closing the pump housing cover
the contact wall, which is integrally formed therewith, is
simultaneously displaced into the working position.
[0009] Embodiments of the invention are evident from the
subclaims.
[0010] According to the invention the squeeze roller carrier
together with the squeeze rollers is positioned at a housing base,
wherein support detents for receiving pivot cams of the setting
lever are provided at the housing base. In that case it can be
advantageous in a further embodiment if guides for receiving slide
rails at the housing cover are provided at the housing base.
[0011] It can be advantageous if an end wall with a detent tongue
as well as with two substantially U-shaped recesses for passage of
the squeeze hose is provided at the housing base, wherein in a
further embodiment it can be provided that the setting lever is
constructed as a yoke with counter-detent for detenting at the
detent tongue in the housing closed setting. In that case it is
possible to provide with the same detent element a carrier not only
for the squeeze hose bend, but also for the setting lever or
setting yoke.
[0012] The squeeze hose can be provided at a hose carrier or,
however, can be positioned as an individual element in
corresponding detent recesses in the housing end wall, which is
equally proposed by the invention.
[0013] Further advantages, details and features of the invention
are evident from the following description as well as on the basis
of the drawing, in which:
BRIEF DESCRIPTION OF FIGURES
[0014] FIGS. 1 to 4 show, in perspective illustration, different
positions of the pump head of the peristaltic pump from the
unlocked setting up to the squeeze hose withdrawal setting and
[0015] FIGS. 5 and 6 show a cross-section through the housing of
the pump head in unlocked and locking setting.
[0016] Of the peristaltic pump according to the invention, there is
illustrated in the figures the pump head; the corresponding drives
are not further depicted here.
DETAILED DESCRIPTION OF EMBODIMENTS
[0017] The pump head denoted generally by 1 comprises a base
element 2 whith an integrally formed end wall 3 and two side walls
4 which are in turn integrally formed therewith, as well as a
housing cover 6 which is displaceable by way of a pivot lever 5,
and which in turn has integrally formed side wall surfaces 7
parallel to the side wall surfaces 4 of the base part. The side
wall surfaces 7 of the housing cover have, at the lower outer edge
thereof, integrally formed slide rails 8 which are displaceable
guided in corresponding counter rails or grooves in the region of
transition from the base of the side wall surfaces 4.
[0018] As evident particularly from FIG. 2, the pivot yoke 5 is
pivotably mounted at the cover 6 by way of inwardly pointing hinge
pins 9, wherein outwardly pointing pins 10 can bear against pivot
projections 11 which are integrally formed at the side walls 4 of
the base part to pint inwardly.
[0019] A rotor 12 (FIG. 4) with three squeeze rollers 13, which 6
can be brought into rotation by a drive which is not illustrated in
more detail, is detented in the base element 2. As illustrated in
FIGS. 3 and 4, a squeeze hose bend 14 is fixed by the coupling
projections 15 in a squeeze hose carrier 16, which can be
detented--with or released from the front side 3 by way of sliding
guides, wherein the connections 15 project outwardly beyond the
entire housing.
[0020] At this point it is to be noted that the squeeze hose bend
14 is fixable also as an individual element by way of alternatively
provided slots 17 in the carrier plate 16 or directly in the slots
18 in the end wall 3, depending on the respective construction. The
cover 6 has, in the interior, the contact wall 19 for the squeeze
hose 14, wherein this contact wall 19 presses the squeeze hose 14
against the squeeze roller 13 by way of pivotation in accordance
with arrow 20 in FIG. 5, as is evident from FIG. 6, which shows the
pump head in closed setting, i.e. the cover 6 is displaced in
accordance with arrow 21 from the position illustrated in FIG. 5 to
the closed position illustrated in FIG. 6.
[0021] The end wall 3 is beyond that furnished with a detent
element 22 which co-operates with a detent counter-element 23 at
the pivot yoke 5 and detents all elements together in the closed
setting.
[0022] It can be seen that an exchange of the squeeze hose bend 14
subjected to wear is extremely simple:
[0023] From the closed setting illustrated in FIG. 6, the pivot
lever 5 is pivoted upwardly, whereby solely through the resilience
of the squeeze hose 14, which bears against the contact wall 19,
the cover 6 is displaced to the right in the figures, at least into
the slightly open position illustrated in FIG. 1. If the pivot
lever is now pivoted somewhat further and releases the contact cam
11, the cover can be withdrawn from the housing base 3 by way of
the slide rails 8, this position being illustrated in FIG. 3,
wherein at the same time the squeeze hose bend 14 is freed so that
the squeeze hose carrier 16 together with the squeeze hose 14 can
be withdrawn upwardly, as is depicted in FIG. 4. After placing a
new squeeze hose bend 14 around the squeeze rollers 13, there takes
place a pushing together of the elements and finally locking in the
working position illustrated in FIG. 6.
* * * * *