HOSE REEL SPOOL
A hose reel spool has an annular ring defining an axial hub, and two concave side walls. The side walls extend radially outward from the ends of the annular ring, and slant axially inward to converge towards each other as they extent radially outward.
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Reference is made to non-provisional application Ser. No. ______ entitled “HOSE REEL FRAME AND GUIDE ARM,” filed on even date with this application by inventors Anthony Shakal and John Holman, and to non-provisional application Ser. No. ______ entitled “HOSE REEL LATCH,” filed on even date with this application by inventors Anthony Shakal and Scott Hill.
BACKGROUNDThe present invention relates generally to hose reels, and more particularly to hose reel spools having sides that retain the hose on the spool.
Hose reels are commonly used to consolidate fluid-carrying hoses. Wound hoses take up less space, and are less likely to become entangled with surroundings. Industrial hose reels are often biased with torsion springs or counterweights to automatically wind up in the absence of an extending force on the hose attached to the reels.
Hose reels commonly comprise three primary components: a spool, a frame, and a guide arm. Hose reel spools typically comprise a hub with a cylindrical wall and axially opposite side walls. The side walls and cylindrical wall together define an annular retaining area in which wound hose is stored. An anchored end of a hose is usually passed through or attached to a hose mount on the cylindrical wall. This hose mount is commonly angled to prevent the hose from bending excessively when it coils about the spool. Many hose reels also include a frame or stand which supports and anchors the spool. Such frames may attach to one or both sides of the spool. Hose frames must be able to support the full weight of a spool loaded with hose, as well as any strains associated with winding and unwinding the hose. Some hose reels also include guide arms to direct the spooling of the hose, thereby ensuring that the hose coils properly onto the spool. Like frames, guide arms may attach to one or both sides of the hose reel. Most guide arms are rotatably attached, so as to allow the hose to be spooled and unspooled at a range of angles.
In the past, some hose reels have included ratcheting latch assemblies to prevent hose reels from retracting or re-spooling the hose while in use. These latch assemblies typically include a pawl on one of either the hose reel frame or the guide arm, and a toothed ratchet element affixed to one side of the spool. Previous hose reels have included mounts for a pawl on either the frame or the guide arm, but not both, typically due to the increased cost and manufacturing time required. The pawl engages the ratchet element to limit rotation of the spool, preventing it from spooling. With such latch assemblies, a latched hose is retracted by first unspooling the hose slightly to disengage the ratcheting element from the pawl. This can prove difficult if a pawl engages while the hose is fully unspooled. In such a case, it may not be possible to unlatch and re-spool the hose without disassembling the hose reel. It is possible to ensure that this situation never arises by manufacturing the ratchet element on the radially opposite side of the spool from the hose mount, and installing the pawl on the guide arm. When the hose is fully unspooled, the hose mount will align radially with the guide arm. As a result, a pawl mounted on the guide arm can never engage a ratchet element opposite the hose mount while the hose is fully extended. This solution is not available where the hose reel does not include a guide arm. In applications where the guide arm is omitted to save expense, weight, or space, the latch must be mounted elsewhere, or not at all.
Hose reels are preferably strong, compact, and easily assembled. In the past, hose reel frames have sometimes been constructed with axially outward-extending support flanges, and hose reel spools have sometimes been constructed with axially outward-angled dished side walls. Such constructions provide additional strength, but are bulkier than a flat spool, and therefore necessitate a larger frame with a wider footprint. Ease of assembly is important both during and after manufacture; in particular, it is desirable that hose reels be easily adaptable to different working conditions and applications.
SUMMARYThe present invention is directed toward a hose reel spool with two concave, dished side walls bracketing a cylindrical wall. The side walls angle axially inward, converging towards each other as they extend radially outward.
Spool 12 comprises axial hub 104 (not visible in
Frame 14 comprises horizontal frame base 26 and vertical frame sides 28a and 28b. Frame sides 28a and 28b are anchored to frame base 26, which forms the foundation of frame 14. Frame side 28a is welded to frame base 26 to form a single L-shaped frame piece. Frame side 28b is not welded to frame base 26, but is fastened to frame base 26 when frame 14 is assembled. The L-shaped piece comprising frame side 28a and frame base 26 combines with frame side 28b (an I-shaped piece) to form the U-shape of frame 14. Frame sides 28a and 28b support spool 12 and guide arm 16 via mounting hardware 23, as previously discussed. Base 26 does not extend axially wider than guide arm 16. Frame sides 28a and 28b incorporate flanges 30 to strengthen frame 14. Ranges 30 are located on the interior faces of sides 28a and 28b, and are widest at frame base 26, tapering vertically into frame sides 28a and 28b. Because flanges 30 are located on the interior faces of sides 28a and 28b, flanges 30 contribute no additional width to hose reel 10. As previously discussed, sides 108a and 108b of spool 30 angle axially inward toward each other, thereby avoiding contact with flanges 30.
Guide arm 16 is also attached to frame 14, and rotates about the axis of spool 12, but independently from spool 12. Guide arm 16 may be attached directly to frame 14 via one or more fasteners, or anchored to frame 14 by mounting hardware 23. In one embodiment, studs 29 are arranged in a circular array on frame 14, and couple to holes or indents 31 in guide arm 16 to anchor guide arm 16 at a range of predefined angles. The free end of hose 18 passes through hole 20 in guide arm 16, but cannot fully retract into spool 12 because of anchor 22 on hose 18, which is too large to fit through hole 20. Anchor 22 may be a rubber or plastic block secured about hose 18. Guide arm 16 is comprised of two pieces: L-shaped piece 32, comprising one side and the front of guide arm 16, and I-shaped piece 34, comprising the opposite side of guide arm 16. L-shaped piece 32 and I-shaped piece 34 are fastened together to form guide arm 16, as shown.
Ratchet element 24 is affixed to spool 12, and interfaces with pawl 25 on guide arm 16 to prevent hose 18 from retracting undesirably. Ratchet element 24 spans only a partial radial arc of spool 12, as shown, and therefore only aligns with pawl 25 for a fraction of each rotation of spool 12. When ratchet element 24 rotates in the UW direction into alignment with pawl 25, pawl 25 catches with ratchet element 24, exerting a counter-rotational force which prevents rotation of spool 12 in the W direction. When ratchet element 24 is unaligned with pawl 25, or rotates into in the W direction into alignment with pawl 25, pawl 25 does not catch on ratchet element 24, and does not prevent spool 12 from rotating in either direction. Although pawl 25 is shown mounted on guide arm 16 in
As previously stated, spool 12 is comprised of axial hub 104 and side walls 108a and 108b. Axial hub 104 comprises inner end wall 120 (not visible in
Hose 18 mounts on outer cylindrical wall 106 at hose mount 112, which is angled counterclockwise so as not to excessively bend hose 18 where it connects to hose mount 112. In one embodiment, hose mount 112 is a passage through cylindrical wall 106 through which hose 18 is threaded. In another embodiment, hose mount 112 is an attachment point for one end of hose 18, and axial hub 104 further comprises connection apparatus to route fluid from a fluid source into hose 18. In one embodiment, ratchet element 24 is mounted on a radially opposite side of spool 12 from hose mount 112 to avoid locking of ratchet element 24.
When hose is spooled onto spool 12 through hole 20 of guide arm 16 (see
Annular ridge 114 extends axially outward from outer cylindrical wall 106 to provide a radially flat surface for the attachment of a cover (not shown) for spool 12. Annular ridge 114 is described in greater detail along with
Annular ridge 114 is a region of side wall 108b through which mounting holes 116 are bored. Holes 116 allow a cover (not shown) to be screwed or riveted to side wall 108b at annular ridge 114, if so desired. Annular ridge 114 is located at one end of outer cylindrical wall 106, and extends directly radially outward from outer cylindrical wall 106 so as to provide a flat mounting surface for the cover. Although annular ridge 114 is shown on side 108b, it could instead be located on side 108a.
The radially outer extents of side walls 108a and 108b turn axially outward in outer annular lips 118a and 118b, which strengthen spool 12. Second side wall 108b ends in second outer annular lip 118b, which turns axially away from hose retaining area 110 and first side wall 108a. Analogously, first side wall 108a (not visible in
In embodiments wherein spool 12 is formed from two halves, inner end wall 120 may be split into two abutting sections: first inner end wall section 120a (which is a part of first spool half 102a) and second inner end wall section 120b (which is a part of second spool half 102b). These sections are bolted or welded together to connect spool half 102a to spool half 102b. In one embodiment, first inner end wall section 120a includes hole 126, and second inner end wall section 120b includes collar 124. Hole 126 is a central hole in second inner axial end wall section 120a, and is large enough to admit collar 124. Collar 124 is a central, axially extending portion of second inner axial end wall section 120b which passes though hole 126 and forms a journal for mounting hardware 25. In another embodiment, the location of collar 124 and hole 126 is reversed: collar 124 is located on first inner end wall section 120a, while hole 126 is located in second inner end wall section 120b. A bushing or bearing is inserted in collar 124 to support spool 12 as it spins.
As discussed previously, side walls 108 slope axially inward as they extend radially outward, for added strength. This inward slant is designed to match the aforementioned natural pyramidal stacking profile of hose 18 about inner annular ring 106, and therefore does not impede spooling. The radially outermost edge of first side wall 108a ends in first outer annular lip 118a, and the radially outermost edge of second side wall 108b ends in second outer annular ridge 118b. Outer annular ridges 118a and 118b further strengthen spool 12.
L-shaped piece 32 has side section 302 (with ridges 308, attachment area 310, pawl mount 402b, spring mount 404b, and holes 31), front section 304 (with front hole 312) and side tab 306 (with fastener holes 318). L-shaped piece 32 is attached to I-shaped piece 34 by threading fasteners 322 (see
Guide arm 16 is attached to frame 14 at attachment area 310. In one embodiment, holes 31 on guide arm 16 accept studs 29 on frame 14. Studs 29 and holes 31 are arranged in a circular array, and hold guide arm 16 in place at any of a range of predetermined angles with respect to spool 12. When L-shaped piece 32 is attached to I-shaped piece 34, guide arm 16 can rotate in discrete angular intervals about the axis of spool 12 (defined by mounting hardware 23), such that studs 29 supports guide arm 16 at a desired position. In some embodiments, guide arm 16 may be further or alternatively supported by clips or bolted fasteners, or may be anchored in place by mounting hardware 23.
Hose 18 passes through front hole 312, and is therefore constrained by guide arm 16 constrained to approach spool 12 from a limited range of angles. This forces hose 18 to spool in a regular, tidy fashion on spool 12, and prevents harmful loads from being applied to spool 12 or frame 14.
Pawl 25 (see
I-shaped piece 34 has ridges 308, attachment area 310, fastener holes 320, fasteners 322, and holes 31. I-shaped piece 34 attaches to L-shaped piece 32 by securing fasteners 322 through fastener holes 318 and 320. In this fashion, L-shaped piece 32 and I-shaped piece 34 are joined together to form the guide-arm 14, which is U-shaped. Like L-shaped piece 32, I-shaped piece 34 incorporates ridges 308 for added strength, as shown, and attaches to frame 14 at attachment area 310. As shown in
Although frame 14 and guide arm 16 have been described as substantially symmetric U-shaped structures, they may alternatively be manufactured as L-shaped, asymmetric parts. In such an embodiment, frame 14 does not include frame side 28b, and guide arm 16 does not include I-shaped piece 34. Frame 14 attaches to spool 12 and guide arm 14 on only one side, and mounting hardware 23 must therefore be an asymmetric pin or cantilevered shaft, rather than a shaft or axle supported on both sides of spool 12. This embodiment trades some degree of frame strength for simpler installation and removal of spool 12.
V. Latch Assembly 400Guide arm 16 is attached to frame 14 at attachment location 310. In one embodiment, mounting hardware 25 runs through attachment location 310 to secure guide arm 16 to frame 14. In another embodiment, guide arm 16 is attached to frame 14 by one or more pins. As discussed with respect to
Either of frame 14 and guide arm 16 can mount latch assembly 400. Pawl 25 can be mounted either on frame 14 or on guide arm 16 by inserting bolt 410 through pawl 25 into pawl mount 402a or 402b, respectively. Pawl 25 engages ratchet element 24, as discussed previously, to halt rotation of spool 12. Spring 408 attaches to pawl 25 and either spring mount 404a (if pawl 25 is mounted on frame 14) or spring mount 404b (if pawl 25 is mounted on guide arm 16). Spring mounts 404a and 404b are attachment points which anchor one end of spring 408. In one embodiment, spring mounts 404a and 404b are stamped tabs bent out from frame 14 and guide arm 16, respectively. By stretching between pawl 25 and spring mount 404a or 404b, spring 408 exerts a counter-rotational force on pawl 25 to keep pawl 25 engaged with ratchet element 24, as explained further in description accompanying
Although pawl mounts 402a and 402b are shown on side 28a and L-shaped piece 32, respectively, pawl mounts 402a and 402b could equivalently be situated on side 28b and I-shaped piece 34, respectively. Attachment locations 402a, 402b, 404a, and 404b must all, however, be located on the same side of hose reel assembly 10 as ratchet element 24.
When hose 18 is fully extended from spool 12, hose 18 stretches directly from hose mount 112 to hole 20 in guide arm 16 (see
For some applications, however, guide arm 16 may not be used. In such cases, pawl 25 cannot be mounted on (absent) guide arm 16, and must instead be mounted on frame 14. Although frame 14 is a less desirable location for pawl 25 than guide arm 16 for the reasons described above, frame 14 is an acceptable alternative location for pawl 25.
VI. ConclusionThe hose reel described herein provides several advantages. Ridging on frame 14 and guide arm 16 strengthens hose reel 10 against bending, and inward-facing flanges 30 provide stability and strength without increasing hose reel bulk. The spool shape of the present invention makes use of the natural stacking profile of coiled hose to minimize bulk and improve durability without restricting hose movement. The axially inward-sloped sides of hose reel spool 12 provide increased strength without additional spool width, and allow spool 12 to be mounted frame 14 despite axially inward-facing support flanges 30, for a strong, compact hose reel assembly.
Constructing frame 14 and guide arm 16 from L-shaped and I-shaped pieces simplifies the assembly of hose reel 10 and allows easy access to spool 12. Spool 12 can be removed by unscrewing fasteners 322 and 216 from guide arm 16 and frame 14, respectively, and disconnecting mounting hardware 23 from mounting point 310. I-shaped piece 34 and frame side 28b can then be removed, allowing spool 12 to be detached from fastening hardware 23. Installing spool 12 follows the opposite procedure: spool 12 is first attached to fastening hardware 23, then frame side 28b and finally I-shaped piece 34 are fastened in place on base 26 and L-shaped piece 32 with fasteners 216 and 322, respectively.
By providing attachment points for pawl 25 and spring 408 on both guide arm 16 and frame 14, the present invention allows hose reel 10 be used with or without guide arm 16, while enabling optimal latch placement for either case. Latch assembly 400 is manufactured identically, whether attached to guide arm 16 or frame 14. A user can quickly and easily swap latch assembly 400 from frame 14 to guide arm 16, or vice versa, by removing bolt 410 from pawl mount 402a or 402b and detaching spring 408 from spring mount 404a or 404b.
While the invention has been described with reference to an exemplary embodiment(s), it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment(s) disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims
1. A hose reel comprising:
- a hose reel frame; and
- a hose reel spool rotatably mounted on the house reel frame, the hose reel spool comprising: a cylindrical wall defining an axis, the cylindrical wall having first and second axial ends; a first concave side wall located at the first axial end of the annular ring, and extending radially outward from the cylindrical wall; and a second concave side wall located at the second axial end of the annular ring, and extending radially outward from the cylindrical wall; wherein the first and second dished side walls slant axially inward to converge towards one another.
2. The hose reel of claim 1, wherein the radially outermost edges of the first and second side walls turns axially outward in lips.
3. The hose reel of claim 2, wherein neither lip is the axially outermost extent of the hose reel spool.
4. The hose reel of claim 1, wherein the hose reel frame comprises:
- a frame side to support the hose reel spool;
- a mount in the frame side for rotatably attaching the annular ring; and
- a flange extending axially inward toward the spool from the mount toward the annular ring for strengthening the hose reel frame;
- wherein the axially inward slants of the first and second side walls prevent the hose reel spool from contacting the flange.
5. The hose reel of claim 4, further comprising a guide arm with a section radially outward of the first and second side walls to guide hose into the hose reel spool, the hose reel frame extending no wider axially than the guide arm.
6. The hose reel of claim 1, wherein the first side wall extends directly radially outward to form a flat attachment surface before slanting axially inward toward the second side wall.
7. The hose reel of claim 1, further comprising a ratchet element affixed to an outer surface of one of the side walls.
8. The hose reel of claim 4, further comprising
- a ratchet element affixed to an outer surface of one of the side walls; and
- a hose mount for mounting the hose on the cylindrical wall, the hose mount located on a portion of the cylindrical wall radially opposite from the ratchet element.
9. The hose reel of claim 8, wherein the ratchet element is a circular arc, toothed to catch a pawl.
10. A hose reel spool providing a hose retaining area for coiling a hose, the hose retaining area defined:
- at an inner radial extent by a cylindrical wall;
- at a front axial extent by a dished, axially backward-slanting first side wall extending radially outward from the cylindrical wall; and
- at a back axial extent opposite the front axial extent, by a dished, axially forward-slanting second side wall extending radially outward from the cylindrical wall.
11. The hose reel spool of claim 10, further comprising a hose mount for mounting hose of a particular hose width on the cylindrical wall, wherein the axial width of the hose retaining area at its inner radial extent is slightly greater than four times the particular hose width.
12. The hose reel spool of claim 10, wherein the radially outermost edges of the first and second side walls end in axially outward-turning lips.
13. The hose reel spool of claim 10, wherein the hose reel spool comprises:
- a first half making up the first side wall and a part of the cylindrical wall; and
- a second half making up the second side wall and the remainder of the cylindrical wall.
14. The hose reel spool of claim 10, further comprising a ratchet element affixed to an outer surface of the first side wall.
15. The hose reel spool of claim 14, further comprising a hose attachment point on the cylindrical wall for attaching the hose to the hose reel spool, the attachment point located radially opposite the ratchet element.
16. A hose reel spool for holding a hose, the hose reel spool comprising:
- a first piece having a first cylindrical portion and a first side wall extending radially outward from an end of the cylindrical portion; and
- a second piece having a second cylindrical portion and a second side wall extending radially outward from an end of the cylindrical portion;
- wherein the first and second pieces are connected so that the first and second cylindrical portions meet to form a single cylindrical wall, and the first and second side walls converge towards each other.
17. The hose reel spool of claim 16, wherein the first side wall includes a ratchet element capable of catching on a nearby pawl.
18. The hose reel spool of claim 16, wherein
- the radially outermost edge of the first side wall turns axially outward, away from the second side wall, in a first strengthening lip; and
- the radially outermost edge of the second side wall turns axially outward, away from the first side wall in a second strengthening lip.
19. The hose reel spool of claim 16, wherein the second side wall includes an annular ridge which protrudes axially away from the first side wall.
20. The hose reel spool of claim 16, wherein the single annular wall has a width slightly greater than four times the width of the hose.
Type: Application
Filed: Jan 14, 2011
Publication Date: Oct 24, 2013
Applicant: GRACO MINNESOTA INC. (Minneapolis, MN)
Inventor: Anthony J. Shakal (Crystal, MN)
Application Number: 13/522,461
International Classification: B65H 75/44 (20060101);