U.S. patent application number 09/866580 was filed with the patent office on 2002-01-24 for worm-driven hose clamp.
Invention is credited to Keller, Werner, Mann, Stephan, Redemann, Hartmut, Stichel, Willi.
Application Number | 20020007536 09/866580 |
Document ID | / |
Family ID | 7643594 |
Filed Date | 2002-01-24 |
United States Patent
Application |
20020007536 |
Kind Code |
A1 |
Keller, Werner ; et
al. |
January 24, 2002 |
Worm-driven hose clamp
Abstract
A worm-driven hose clamp has a housing made of a band connected
with interlocking cutout and projection to form an open butt joint.
A clamping screw with a threaded shaft is arranged in the housing.
The first and second ends of a clamping strip are overlappingly
received in the housing. The first end has thread elements
interacting with the threaded shaft. The second end is fastened to
the housing bottom which has transverse edges extending
transversely to the butt joint. The transverse edges have radially
outwardly, circumferentially projecting tongues on opposite sides
of the butt joint. The second end has openings on opposite sides of
the butt joint for receiving the tongues. Depressions adjoin the
openings. They project radially inwardly and extend longitudinally
in a circumferential direction of the clamping strip away from the
housing relative to the transverse edges. The tongues penetrate the
openings and matchingly engage the depressions.
Inventors: |
Keller, Werner; (Maintal,
DE) ; Mann, Stephan; (Bieber, DE) ; Redemann,
Hartmut; (Hanau, DE) ; Stichel, Willi;
(Maintal, DE) |
Correspondence
Address: |
Friedrich Kueffner
Suite 1921
342 Madison Avenue
New York
NY
10173
US
|
Family ID: |
7643594 |
Appl. No.: |
09/866580 |
Filed: |
May 25, 2001 |
Current U.S.
Class: |
24/274R |
Current CPC
Class: |
F16L 33/08 20130101;
Y10T 24/1457 20150115; Y10T 24/1427 20150115 |
Class at
Publication: |
24/274.00R |
International
Class: |
F16L 033/08 |
Foreign Application Data
Date |
Code |
Application Number |
May 25, 2000 |
DE |
100 26 020.9 |
Claims
What is claimed is:
1. A worm-driven hose clamp comprising: a housing (2) having a
bottom (9) and comprised of a housing band (10) having opposed ends
with an edge, respectively, wherein a first one of the edges has a
cutout (13) and a second one of the edges has a matching projection
(12), wherein the cutout and the projection (12, 13) are configured
to interlock and connect the opposed ends by forming an open butt
joint (11); a clamping screw (3), having a head (4) and a threaded
shaft (5), wherein the threaded shaft (5) is arranged in the
housing (2); a clamping strip (1) having a first end (6) and a
second end (7) received in the housing (2), wherein the first end
(6) overlaps the second end (7) in a circumferential direction of
the clamping strip (1) and is positioned radially outwardly of the
second end (7); the first end (6) having thread elements (8)
interacting with the threaded shaft (5); the second end (7)
positive-lockingly connected to the bottom (9) of the housing (2);
the bottom (9) having a first transverse edge, positioned opposite
the head (4) of the clamping screw (3), and a second transverse
edge, positioned proximal to the head (4) of the clamping screw,
wherein the first and second transverse edges extend transversely
to the open butt joint (11), wherein at least the first transverse
edge has two radially outwardly and circumferentially projecting
tongues (14) positioned on opposite sides of the open butt joint
(11); the second end (7) having openings (15), wherein the openings
(15) are positioned on opposite sides of the open butt joint (11)
at least in the area of the first transverse edge and are
configured to receive the tongues (14); the second end (7) having
depressions (16) adjoining the openings (15), respectively, wherein
the depressions (16) project radially inwardly and extend
longitudinally in a circumferential direction of the clamping strip
(1) away from the housing (2) relative to the first and second
transverse edges, respectively; the tongues (14) penetrating the
openings (15) and matchingly engaging the depressions (16),
respectively.
2. The worm-driven hose clamp according to claim 1, wherein the
tongues (14) are bent radially outwardly away from an underside of
the bottom (9).
3. The worm-driven hose clamp according to claim 1, wherein the
bottom (9) has inwardly extending projections (17) on opposite
sides of the open butt joint (11), wherein the projections (17)
engage the openings (15) provided in the area of the second
transverse edge.
4. The worm-driven housing according to claim 3, wherein the bottom
(9) has U-shaped cuts (18) and wherein the tabs (17) defined by the
U-shaped cuts (18) are bent radially inwardly to form the
projections (17), wherein the openings (15) provided in the area of
the second transverse edge have edges remote from the open butt
joint (11), and wherein the tabs (17) have free ends resting
against the edges remote from the open butt joint (11),
respectively.
5. The worm-driven hose clamp according to claim 1, wherein: the
housing (2) has a rounded top (20) and a lateral stabilizer portion
(19); the lateral stabilizer portion (19) is arranged only on the
right side of the housing (2), the right side being defined when
the clamping screw (3) being positioned above the clamping strip
(1) and viewed in a direction from the head (4) to the shaft of the
clamping screw (3); the lateral stabilizer portion (19) has an
outwardly positioned radial wall portion (21) and a slanted wall
portion (22) extending tangentially relative to the clamping screw
(3) and connecting the rounded top (20) and the radial wall portion
(21); the slanted wall portion (22) is located radially outwardly
of the first end (6) of the clamping strip (1) and adjacent to the
free end of the threaded shaft (5) remote from the head (4) of the
clamping screw (3); the lateral stabilizer portion (19) has a
curved wall portion (23) located adjacent to the slanted wall
portion (22), when viewed in an axial direction of the the lateral
stabilizer portion has an axial wall portion connecting the curved
wall portion and the radial wall portion.
6. The worm-driven hose clamp according to claim 5, wherein the
lateral stabilizer portion comprises a transverse wall extending
transversely to the axial direction of the threaded shaft and
connecting the curved wall portion, the axial wall portion, and the
slanted wall portion, wherein the transverse wall is formed by
pressing a sidewall of the housing inwardly.
7. The worm-driven hose clamp according to claim 6, wherein the
plane of the transverse wall intercepts substantially a center of
that section of the clamping screw, which section is threadingly
engaging the clamping strip.
8. The worm-driven hose clamp according to claim 1, wherein the
housing has rounded corners at an end of the housing opposite the
head of the clamping screw.
8. The worm-driven hose clamp according to claim 1, wherein the
housing (2) has rounded corners (29) at an end of the housing (2)
opposite the head (4) of the clamping screw (3).
9. The worm-driven hose clamp according to claim 1, wherein the
tongues (14) have free ends with beveled, radially outwardly
positioned corners.
10. The worm-driven hose clamp according to claim 1, wherein the
depressions (16) have lower edges aligned substantially with the
underside of the bottom (9), and wherein the depressions (16) have
a depth decreasing to zero in a direction away from the openings
(15).
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The invention relates to a worm-driven hose clamp comprising
a clamping strip, a housing, and a clamping screw comprising a head
and a threaded shaft, wherein the clamping strip comprises
overlapping end portions. The radially outwardly positioned one of
the end portions is provided with thread elements which interact
with the threaded shaft, and the radially inner end portion is
positive-lockingly connected with the bottom of a housing
surrounding the end portions and the threaded shaft of the clamping
screw. The housing supports the clamping screw in both
circumferential directions of the hose clamp. The housing is
comprised of a housing band whose ends delimit an open butt joint
in the area of the housing bottom and are connected to one another
by interlocking undercuts of their edges defining the open butt
joint. The bottom of the housing comprises at least on the
transverse edge facing away from the head of the clamping screw, a
radially outwardly angled tongue on both sides of the open butt
joint. The tongue penetrates through an opening in the radially
inwardly positioned end portion of the clamping strip.
[0003] 2. Description of the Related Art
[0004] In a known worm-driven hose clamp of this kind (DE 196 33
435 C1) a single opening is formed at each transverse edge of the
housing bottom in the form of a groove which is pressed radially
outwardly and extends transverse to the strip. On each transverse
edge the two tongues engage together the same opening wherein the
tongues are positioned so as to laterally rest against one another.
The tongues are provided to prevent spreading of the open butt
joint from a central area, where the edges of the open butt joint
are connected by positive-locking engagement of interlocking
undercuts, toward the transverse edges of the housing bottom, in
particular, in a direction toward the transverse edge positioned at
the end where the head of the clamping screw is located.
[0005] This type of connection of the abutting ends of the housing
band is able to withstand very high clamping forces. However, for
even higher clamping forces there is the risk of deformation, in
particular, of the area of the clamping strip opening positioned on
the transverse edge of the housing bottom facing away from the head
of the clamping screw, and there is still the risk of spreading of
the open butt joint, particularly at the side of the screw
head.
SUMMARY OF THE INVENTION
[0006] For a worm-driven hose clamp of the aforementioned kind, it
is an object of the present invention to reduce the risk of
deformation of the clamping strip and to configure the connection
of the ends of the housing band in the area of the housing bottom
so as to be even more stable.
[0007] In accordance with the present invention, this is achieved
in that the tongues are oriented in the circumferential direction
of the clamping strip and in that each tongue has correlated
therewith its own opening having positioned adjacent thereto a
radially inwardly pressed depression oriented away from the
respective bottom edge in the circumferential direction of the
clamping strip, wherein each depression is matchingly engaged by a
tongue, respectively.
[0008] In this solution, at each transverse edge of the housing
bottom there are two areas of radially free end faces of the
neighboring depressions resting against the sides of each tongue
and providing support surfaces, i.e., a total of four areas or
support surfaces is provided at each transverse edge. These areas
are subjected to a reduced surface pressure in comparison to only
two areas provided on each transverse edge, as is the case in the
known embodiment. Moreover, the spreading of the open butt joint on
the housing bottom by the lateral deflection of the radially outer
end portions of the clamping strip is prevented, in particular, on
the side of the head of the clamping screw, up to even high
clamping force since each tongue rests against a respective
sidewall of the depression when one sidewall of the housing is
loaded laterally (axially) in the direction of spreading of the
open butt joint as a result of a force of the radially outer end
portion of the clamping strip acting in the axial direction of the
clamp. In the past, only one of the two adjacently positioned
tongues was supported on the edge of the single opening receiving
both tongues.
[0009] Preferably, it is ensured that the tongues are pressed away
from the underside of the housing bottom radially outwardly. In
this configuration, a stepped arrangement results at the transition
from the housing bottom to the tongues. In this connection, the
housing bottom can be supported underneath the tongues on the
radially free end faces of the depressions in the circumferential
direction of the hose clamp.
[0010] Moreover, it is beneficial when the housing bottom has on
both sides of the open butt joint projections projecting past the
inner side of the housing bottom which project into the openings
positioned closest to the clamping screw head. These projections
take up additional spreading forces and therefore also contribute
to the stability of the housing bottom.
[0011] The projections can be formed by tabs formed between the
legs of U-shaped cuts in the bottom and pressed out of the bottom
plane. The tabs rest with their free ends against those edges of
the openings positioned farthest away from the open butt joint,
respectively. These tabs can receive especially high forces and can
be formed in a simple way.
[0012] Moreover, it can be provided that the housing is provided
only on its right side, which is defined when the clamping screw is
positioned above the clamping strip and viewed from the head in the
direction toward the threaded shaft of the clamping screw, with a
lateral stabilizer portion whose wall comprises, in an area
radially external to the radially outer end portion of the clamping
strip adjacent to the free end of the clamping screw shaft, a wall
portion extending from the rounded top of the housing tangentially
to a radial wall portion of the lateral stabilizer portion and
further comprises, adjacent to a central portion of the threaded
shaft of the clamping screw, a curved wall portion resting against
the threaded shaft and an axial wall portion connecting the curved
wall portion with the radial wall portion. This lateral stabilizer
portion prevents a lateral tilting of the housing in the rotational
direction of the clamping screw. Its curved wall portion
contributes to the guiding action of the clamping screw
tangentially to the hose clamp. The slanted wall portion prevents
widening of the curved wall portion and of the axial wall portion
during clamping. At the same time, the slanted wall portion reduces
the contact surface between the thread of the threaded shaft of the
clamping screw and the wall of the housing so that the thread in
the area of the slanted wall portion experiences reduced wear. The
clamping screw can thus be rotated easily even after several
actuations or rotations. Accordingly, the torque required for
clamping the clamping screw remains minimal even for an extended
service life.
[0013] The curved wall portion and the axial wall portion can be
formed by pressing the sidewall of the housing inwardly so that a
wall portion extending transversely to the clamping screw is formed
between the slanted wall portion, the curved wall portion, and the
axial wall portion. This imparts high stiffness to the sidewall of
the lateral stabilizer portion against spreading.
[0014] Preferably, the plane of the transversely extending wall
portion intercepts approximately the center of the section of the
clamping screw engaging the clamping strip with its thread. In the
area of the center of the section of the clamping screw engaging
the clamping strip with its thread, the housing is subjected to
especially high forces which have the tendency to widen the
housing. In the described position, the transversely extending wall
portion counters such a tendency for widening in a particularly
beneficial way.
[0015] The corners of the housing end facing away from the head of
the clamping screw are preferably rounded. This reduces the risk
that the these corners will penetrate the material of an end
section of a hose to be clamped onto a socket or pipe section and
will thus damage the hose.
[0016] The radially outer corners of the free end of the tongues
can be beveled. With such a configuration, they will not impair, as
would be the case with right angle corners, the movement of the
radially outer end of the clamping strip relative to the radially
inner end.
[0017] Moreover, it is advantageous when the lower edge of the
depressions are substantially aligned with the underside of the
housing bottom and the depth of the depressions decreases
continuously to zero from the end adjoining the opening,
respectively, to the opposite end. In this embodiment, a
substantially continuous edge-free transition between the housing
bottom and the inner side of the clamping strip is provided with a
correspondingly uniform radial pressing of a hose onto the
circumference of a socket or pipe.
BRIEF DESCRIPTION OF THE DRAWING
[0018] In the drawing:
[0019] FIG. 1 is a perspective view of an embodiment of the
worm-driven hose clamp according to the invention in the open
state;
[0020] FIG. 2 is a detail on an enlarged scale of the worm-driven
hose clamp according to FIG. 1;
[0021] FIG. 3 is a front view of the hose clamp according to FIG. 1
viewed from the head of the clamping screw;
[0022] FIG. 4 shows a cross-section IV-IV on an enlarged scale of
the worm-driven hose clamp according to FIG. 3;
[0023] FIG. 5 shows the section V-V of FIG. 4;
[0024] FIG. 6 is another perspective view of the worm-driven hose
clamp according to the invention in the closed state;
[0025] FIG. 7 shows the section VII-VII of the worm-driven hose
clamp according to FIG. 9;
[0026] FIG. 8 shows a section VIII-VIII of the worm-driven hose
clamp according to FIG. 9;
[0027] FIG. 9 is a view, on a reduced scale, of the worm-driven
hose clamp according to the invention in the closed state, viewed
in a direction from the head of the clamping screw;
[0028] FIG. 10 is a perspective view on an enlarged scale of the
housing of the worm-driven hose clamp according to the
invention;
[0029] FIG. 11 shows a bottom view of the housing of the
worm-driven hose clamp on a scale slightly reduced relative to FIG.
10;
[0030] FIG. 12 shows a side view of the housing according to FIG.
11;
[0031] FIG. 13 is a front view of the housing according to FIG.
11;
[0032] FIG. 14 shows a different side view of the housing according
to FIG. 11;
[0033] FIG. 15 is a plan view of the housing according to FIG. FIG.
16 is a perspective view of the clamping strip of the worm-driven
hose clamp according to the invention in the open state;
[0034] FIG. 17 is a perspective view of the clamping strip of the
worm-driven hose clamp according to the invention in the coiled
state;
[0035] FIG. 18 shows section XVIII-XVIII of FIG. 19; and
[0036] FIG. 19 shows a plan view onto the clamping strip of the
worm-driven hose clamp according to the invention in the open
state.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0037] The illustrated worm-driven hose clamp is comprised of a
clamping strip 1, a housing 2, and a clamping screw 3 with a
right-hand thread having a head 4 and a threaded shaft 5. The
clamping strip 1 has ends 6 and 7 which overlap in the
circumferential direction of the hose clamp wherein the radially
outer end 6 is provided with thread elements 8 in the form of
substantially axially extending ribs that are pressed out of the
clamping strip 1 and engage the threaded shaft 5. The radially
inwardly positioned end 7 is connected positive-lockingly with the
bottom 9 of the housing 2 surrounding the ends 6, 7 and the
threaded shaft 5. The housing 2 supports the clamping screw 3 in
both circumferential directions of the hose clamp and is comprised
of a housing band 10 whose ends are positive-lockingly connected in
the area of the bottom 9 along an open butt joint 11 (FIGS. 10 and
11). The positive-locking connection is formed by interlocking
undercuts of the two edges delimiting the open butt joint 11 of the
housing band 10. The interlocking undercuts are comprised, on the
one hand, of a hammerhead-shaped projection 12 at one end of the
housing band 10 and, on the other hand, by a hammerhead-shaped
cutout 13 matching the projection at the other end of the housing
band 10 (FIGS. 10 and 11). Instead of the hammerhead-type
connection 12, 13, it is also possible to provide a dovetail
connection.
[0038] The bottom 9 of the housing 2 has at its transverse edges on
both sides of the open butt joint 11, respectively, a radially
outwardly angled tongue 14 projecting, respectively, through an
opening 15 correlated with the tongue 14 and provided in the
radially inner end 7 of the clamping strip 1. Moreover, each tongue
engages matchingly a radially inwardly pressed depression 16
extending away from the respective bottom edge in the
circumferential direction of the clamping strip 1, wherein the
depression 16 adjoins an opening 15, respectively.
[0039] As can be seen particularly in FIGS. 4 and 10, the tongues
14 are pressed radially outwardly away from the underside of the
housing bottom 9.
[0040] The radially outer corners of the free ends of the tongues
14 are beveled so that they do not project radially outwardly past
the radially outer edge of the recesses or grooves formed by the
depressions 16 and therefore do not impair movement of the radially
outer end 6 across the tongues 14.
[0041] Moreover, the housing bottom 9 has on both sides of the open
butt joint 11 projections 17 projecting past its inner side which
project into the openings 15 in the end 7 of the hose clamp strip 1
positioned closest to the head 4 of the screw 3.
[0042] The projections 17 are formed by tabs which are produced by
U-shaped cuts 18 in the bottom 9 and are pressed out of the plane
of the bottom 9. With their free ends the tabs (17) rests against
the edges of the openings 15 farthest away from the open butt joint
11.
[0043] The housing 2 has only on its right side, which is defined
when the clamping screw 3 positioned above the clamping strip 1 and
viewed in the direction from the head 4 to the shaft 5 of the
clamping screw 3, a lateral stabilizer portion 19 whose wall,
radially outwardly of the radially outer end 6 of the clamping
strip 1 adjacent to the free end of the clamping screw shaft 5, has
a slanted wall portion 22 connecting the rounded top 20 of the
housing 2 tangentially with a radial wall portion 21 of the lateral
stabilizer portion 19. Moreover, the lateral stabilizer portion 19
has adjacent to a central portion of the shaft 5 of the clamping
screw 3 a curved wall portion 23 resting against the shaft 5 and an
axial wall portion 24 connecting the curved wall portion 23 with
the radial wall portion 21.
[0044] The curved wall portion 23 and the axial wall portion 24 are
formed by pressing the sidewall of the housing 2 inwardly. By doing
so, a transversely extending wall portion 25, positioned
transversely to the clamping screw 3, is formed between the
slantedly extending wall portion 22, the curved wall portion 23,
and the axial wall portion 24.
[0045] The plane of the transversely extending wall portion 25
intercepts approximately the center of the section of the clamping
screw engaging with its thread the clamping strip 1.
[0046] The lower edge of the depressions 16 is substantially
aligned with the underside of the housing bottom 9, and the depth
of the depressions 16 decreases continuously to zero from the end
adjacent to the respective opening 15 toward the opposite end. This
results in a substantially continuous transition between the
housing bottom 9 and the inner side of the clamping strip 1 with a
corresponding uniform clamping pressure distribution by means of
the worm-driven hose clamp about the circumference of a hose to be
clamped onto a socket or the like.
[0047] In this worm-driven hose clamp, the transverse edges of the
housing bottom, during clamping or releasing of the worm-driven
hose clamp, are supported in the circumferential direction of the
hose clamp on the free radial end faces of the opening edges 26 of
the depressions 16 on both sides of the tongues 14 (FIGS. 4, 17,
18). Thus, a total of four surfaces per transverse edge is
provided. These support surfaces are thus overall greater than in
the known embodiment (DE 196 33 435 C1), in which the transverse
edges of the housing bottom 9 are supported only on two surfaces,
positioned adjacent to each tongue pair, of an opening for
receiving the tongue pair provided in the sidewall of the
transverse groove provided within the hose clamps. Accordingly, the
surface pressure on the edges of the depression opening and the
transverse edges of the housing bottom is smaller and the
connection to the housing bottom 9 and the clamping strip 1 can be
loaded with a higher clamping force in the circumferential
direction of the clamping strip without material deformation.
Moreover, the tongues 14 contribute by engagement of the
depressions 16 to the stability of the connection of the two ends
of the housing band 10 in the area of the open butt joint 11. In
addition, the projections 17 engaging the openings 15 of the
radially inner end 6 of the strip 1 contribute to the stability of
the connection of the housing band ends on the side of the housing
bottom 9 at the side closest to the clamping screw head 4 which is
loaded strongest in the transverse direction (axially). Since the
tongues 14 are pressed radially outwardly away from the underside
of the housing bottom 9, a substantially continuous transition
between the underside of the housing bottom 9 and the radially
inwardly positioned edge of the depression 16 results. The
transverse edges of the housing bottom 9 can thus also be supported
in the circumferential direction of the clamping strip 1 on the
radially inner area of the opening edges 26 of the depressions
16.
[0048] The lateral stabilizer portion 19 prevents a lateral tilting
of the housing 2 when turning the clamping screw 3 to the right
when the worm-driven hose clamp is tensioned because the clamping
screw 3, on the one hand, has a tendency to roll with its threaded
shaft 5 on the surface of the radially outer end 6 and, on the
other hand, as a result of the slanted thread elements 8, is forced
with an axial force component to the side in the direction toward
the lateral stabilizer portion 19. The force which is exerted
during tightening of the clamping screw 3 on the right housing wall
(FIG. 5) has a tendency to bend the curved wall portion 23 to the
right in the outward direction, i.e., to stretch it, but this is
prevented by the axial wall portion 24 and the transversely
extending wall portion 25 up to very high clamping forces. Even
though the clamping screw head 4 with its flange 27 engages across
the opening edge of the housing 2 in order to prevent a rotation of
the clamping screw about an axial transverse axis during clamping,
which would cause the head 4 of the clamping screw 3 to move toward
the clamping strip 1, such a rotation could not be excluded when
very high clamping forces occur. For this reason, not only one
sidewall 28 of the housing 2 is approximately planar, i.e., is not
pressed toward the clamping screw 3 like the oppositely positioned
sidewall between the wall portion 23 and 24, but the slanted wall
portion 22 is also formed to be straight, i.e., without a
depression. This wall portion 22 ensures thus additionally that the
housing 2, on the one hand, cannot widen and, on the other hand,
cannot yield to the torque of the clamping screw 3 about its axial
transverse axis.
[0049] Moreover, the presence of the slanted wall portion 22
results in a spacing between an end portion of the threaded shaft 5
of the clamping screw 3, the end portion having a length that
matches the width of the slanted wall portion 22, and the wall
portion 22 such that the thread of the screw 3 will not come into
contact with the housing in the area of the slanted portion 22 and
thus experiences contact wear to a lesser degree. The clamping
screw 3 is therefore easily actuatable for an extended period of
time even after several actuations and exertion of a high clamping
force.
[0050] Since the transversely extending wall portion 25 of the
lateral stabilizer portion 19 is positioned substantially at the
center of the section of the threaded shaft 5 of the clamping screw
3 engaging the thread elements 8 of the end 6, this portion of the
housing, which is most strongly loaded in the transverse direction
of the housing 2, is very stiff so that it cannot be widened by the
clamping screw 3 even when very high clamping forces are
exerted.
[0051] The corners 29 of the housing end facing away from the head
4 of the clamping screw 3 are rounded so that they cannot easily
penetrate into the clamped hose material and, accordingly, cannot
damage it.
[0052] The end portion of the housing 2 positioned at the head 4 of
the clamping screw 3 is provided with tabs 30 and 31 at its
radially inner edges. The tabs 30, 31, after introduction of the
clamping screw 3 into the housing 2, are bent under the neck of the
clamping screw 3 which is without thread in order to thus prevent a
return movement of the clamping screw 3 relative to the housing 2
during opening (releasing) of the worm-driven hose clamp upon
reverse rotation of the clamping screw 3.
[0053] While specific embodiments of the invention have been shown
and described in detail to illustrate the inventive principles, it
will be understood that the invention may be embodied otherwise
without departing from such principles.
* * * * *