US20040177871A1 - Umbrella with two-piece, pivotable ribs to prevent wind damage - Google Patents
Umbrella with two-piece, pivotable ribs to prevent wind damage Download PDFInfo
- Publication number
- US20040177871A1 US20040177871A1 US10/389,395 US38939503A US2004177871A1 US 20040177871 A1 US20040177871 A1 US 20040177871A1 US 38939503 A US38939503 A US 38939503A US 2004177871 A1 US2004177871 A1 US 2004177871A1
- Authority
- US
- United States
- Prior art keywords
- rib section
- umbrella
- outer rib
- section
- canopy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45B—WALKING STICKS; UMBRELLAS; LADIES' OR LIKE FANS
- A45B25/00—Details of umbrellas
- A45B25/22—Devices for increasing the resistance of umbrellas to wind
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45B—WALKING STICKS; UMBRELLAS; LADIES' OR LIKE FANS
- A45B19/00—Special folding or telescoping of umbrellas
- A45B19/10—Special folding or telescoping of umbrellas with collapsible ribs
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45B—WALKING STICKS; UMBRELLAS; LADIES' OR LIKE FANS
- A45B23/00—Other umbrellas
- A45B2023/0031—Cantilever umbrellas or sunshades with a support arm
- A45B2023/005—Cantilever umbrellas or sunshades with a support arm the support arm being attached to a rib or being formed by a rib
-
- A—HUMAN NECESSITIES
- A45—HAND OR TRAVELLING ARTICLES
- A45B—WALKING STICKS; UMBRELLAS; LADIES' OR LIKE FANS
- A45B23/00—Other umbrellas
Definitions
- the umbrella canopy 12 includes an arm 54 connected at one end to an upper hub 55 in the central portion of the umbrella canopy and radially extending to a distal end pivotably attached to one side of the collar 43 .
- the ribs 16 that support the umbrella canopy 12 extend radially outward from the upper hub 55 .
- a brace 56 pivotably attaches at one end to the cap 39 at the top of the mast, and extends to the other end 57 pivotably connected to the arm 54 between the center region 55 of the umbrella canopy and the distal end of the arm.
- the arm 54 thus supports the umbrella canopy 12 on the mast assembly 14 , and also functions as one rib of the canopy assembly.
- the arm 54 preferably is located immediately below the adjacent fabric panels 15 of the canopy, with the connection 57 for the brace 56 extending upwardly through a suitable opening in the canopy 12 .
- FIGS. 6-10 show the manner in which the rib sections 16 a , 16 b are assembled onto the rib hinge housing 81 .
- an end of an outer rib section 16 b is introduced into the rearward end 90 of the rib hinge housing 81 and beneath the partial top wall 86 .
- the outer rib section is then welded in place.
- the rearward end of an inner rib section 16 a is introduced into the forward end 88 of the rib hinge housing 81 and advanced to a location slightly spaced apart from the forward end of the outer rib section 16 b , as depicted in FIG. 8. Then, as shown in FIG.
- FIGS. 13 and 14 illustrate an alternate embodiment of a rib hinge 180 comprising the identical components hereinabove described but arranged in a different manner.
- the rib hinge housing 81 is reversed, with the end of the inner rib section 16 a being inserted into the rearward end 90 of the housing and welded in place.
- the adjacent end of the outer rib section 16 b is introduced into the forward end 88 of the housing 81 and held in place by the pivot pin 96 .
- the force 100 exerted by the wind is sufficient to overcome the weight of the canopy and the outer rib section 16 b , the outer rib section pivots in a counterclockwise direction as viewed in FIG. 14.
Landscapes
- Walking Sticks, Umbrellas, And Fans (AREA)
Abstract
An umbrella includes a mast, a hub supported by the mast, a plurality of ribs extending radially outward from the hub, and a canopy supported by the ribs. Each of the ribs comprises an inner rib section having an inner end mounted to the hub. An outer rib section is pivotably mounted to the outer end of the inner rib section. A stop means engageable by one of the inner and outer rib sections limits pivotable movement of the outer rib section with respect to the inner rib section such that when the stop means is engaged, the inner rib section and the outer rib section are substantially longitudinally aligned. When wind pressure underneath the umbrella reaches a predetermined level, the outer rib sections are pivoted upward, thereby relieving the wind pressure underneath the canopy rather than
Description
- This invention relates in general to large, outdoor umbrellas used to provide shade or other protection from the elements, and relates more specifically to an umbrella having two-piece, pivotable ribs to prevent wind damage.
- A major problem with large, outdoor umbrellas concerns the problem of wind getting underneath the canopy. Particularly with the ribs of the umbrella that support the canopy being angled upward toward the center of the umbrella, where there is no place for the air to escape, pressure underneath the umbrella can reach sufficient levels that the ribs of the umbrella can bend or break.
- Some umbrellas attempt to address this problem by providing a dual-canopy arrangement. A hole is formed in the central portion of the main canopy, through which air can escape. This hole is covered by a second canopy that protects the opening from the elements. However, even in the case of dual-canopy umbrellas, wind pressure can build up faster than it can escape through the opening and still reach sufficient levels to cause damage to the umbrella ribs.
- Stated generally, the present invention comprises an umbrella including a mast, a hub supported by the mast, a plurality of ribs extending radially outward from the hub, and a canopy supported by the ribs. Each of the ribs comprises an inner rib section having an inner end mounted to the hub. An outer rib section is pivotably mounted to the outer end of the inner rib section. A stop means engageable by one of the inner and outer rib sections limits pivotable movement of the outer rib section with respect to the inner rib section such that when the stop means is engaged, the inner rib section and the outer rib section are substantially longitudinally aligned. When wind pressure underneath the umbrella reaches a predetermined level, the outer rib sections are pivoted upward, thereby relieving the wind pressure underneath the canopy rather than breaking or bending the ribs.
- Thus it is an object of the present invention to provide an improved umbrella of the large, outdoor type used to provide shade or other protection from the elements.
- It is another object of the present invention to provide an improved outdoor umbrella that will provide a means for relieving the buildup of wind pressure underneath the canopy of the umbrella.
- It is still another object of the present invention to provide an improved outdoor umbrella that will resist breakage and bending of ribs in response to buildup of wind pressure underneath the canopy of the umbrella.
- Other objects, features, and advantages of the present invention will become apparent upon reading the following specification, when taken in conjunction with the drawings and the appended claims.
- FIG. 1 is a side view of an umbrella according to the present invention.
- FIG. 2 is a top view of the umbrella of FIG. 1.
- FIG. 3 is a cutaway view as seen along line3-3 of FIG. 2.
- FIG. 4 is a top view of the umbrella of FIG. 1 with the canopy illustrated in phantom lines to show the umbrella frame.
- FIG. 5 is a perspective view of a housing of a rib hinge of the umbrella of FIG. 1.
- FIG. 6 is a perspective view showing the housing of FIG. 5 with an outer rib section being inserted into its rearward end.
- FIG. 7 is a perspective view of the assembled housing and outer rib section of FIG. 6 showing an inner rib section being inserted into the forward end of the housing.
- FIG. 8 is a perspective view of the assembled housing, outer rib section, and inner rib section of FIG. 7.
- FIG. 9 is a perspective view of the assembly of FIG. 8 showing the placement of a hole through the housing and inner rib section.
- FIG. 10 is a perspective view of the assembly of FIG. 9 showing a pivot pin positioned within the hole so as to pivotably mount the inner rib section to the housing.
- FIG. 11 is a side view of a first embodiment of a hinged rib assembly in its normal configuration.
- FIG. 12 is a side view of the hinged rib assembly of FIG. 11 in a collapsed configuration.
- FIG. 13 is a side view of a second embodiment of a hinged rib assembly in its normal configuration.
- FIG. 14 is a side view of the hinged rib assembly of FIG. 13 in a collapsed configuration.
- Referring now to the drawings, in which like numerals indicate like elements throughout the several views, FIGS. 1-4 show an
umbrella 10 according to an embodiment of the present invention. Theumbrella 10 includes anumbrella canopy 12 fashioned from fabric panels. Thecanopy 12 is supported at one side by amast 14 on a framework comprising a plurality of ribs 16 (FIGS. 3, 4) in the conventional manner, as explained below in greater detail. Theumbrella canopy 12 is selectively foldable from the open position shown in FIGS. 1-4 to a closed position wherein the canopy lies alongside and generally parallel to themast assembly 14. When opened, thecanopy 12 is selectably adjustable between a horizontal or untilted attitude and various degrees of tilt. These features are disclosed in detail in my U.S. Pat. No. 5,937,882, which is incorporated herein by reference. - The
mast assembly 14 is maintained in an upright position by abase 18. Thebase 18 in the preferred embodiment comprises ahollow pipe section 19 open at its upper end to telescopically receive themast assembly 14 extending in a generally vertical direction up from the base. Thebase 18 preferably includes a securing element such as thesetscrew 22 or the like to engage and retain themast assembly 14 within the base, thereby preventing the mast assembly from pivoting on the base in response to breezes or other forces acting on theumbrella canopy 12. Thebase 18 can be mounted to the substructure by bolts or can be counterweighted to offset the weight of the umbrella canopy. - The
mast assembly 14 includes an elongatetubular mast 20 having a lower portion configured for a telescopic fit within the upper end of thebase 18, as previously mentioned. Ahousing 37 which is affixed to themast 20 accommodates awinding mechanism 38 including a hub located within the hollow interior of the mast. Themast 20 extends above thehousing 37 to an upper end closed by acap 39. Themast 20 from its capped upper end to its lower end preferably is a single length of pipe or other tubular stock, with the winding hub accommodated in a transverse opening formed in the mast within thehousing 37. - A
collar 43 is received for sliding movement along the upper portion of themast 20 extending between thehousing 37 and thecap 39. A U-shaped notch may be formed in the upper edge of thecollar 43 to accommodate a stop pin inserted through a selected one of theseveral openings 49 through the mast at intervals along the upper portion of themast 20. The stop pin preferably is attached to thecollar 43 by a security chain. With the stop pin in place in a selectedhole 49, the stop pin engages the notch and prevents further upward movement of thecollar 43 along themast 20. Alternatively, a hole through thecollar 43 can substitute for the notch so as to fix the collar to themast 20 without movement in either direction along the mast. - The
umbrella canopy 12 includes anarm 54 connected at one end to anupper hub 55 in the central portion of the umbrella canopy and radially extending to a distal end pivotably attached to one side of thecollar 43. Theribs 16 that support theumbrella canopy 12 extend radially outward from theupper hub 55. Abrace 56 pivotably attaches at one end to thecap 39 at the top of the mast, and extends to theother end 57 pivotably connected to thearm 54 between thecenter region 55 of the umbrella canopy and the distal end of the arm. Thearm 54 thus supports theumbrella canopy 12 on themast assembly 14, and also functions as one rib of the canopy assembly. Thearm 54 preferably is located immediately below the adjacent fabric panels 15 of the canopy, with theconnection 57 for thebrace 56 extending upwardly through a suitable opening in thecanopy 12. - A
tension line 60 is wound on the winder hub inside themast 20 and extends upwardly within the mast to a stationary pulley mounted adjacent the upper end of the mast. Theline 60 passes over the pulley and extends downwardly outside the mast to pass over a second pulley carried by thecollar 43 adjacent the distal end of theumbrella arm 54. The line then extends from the second pulley inside thehollow arm 54 to pass over a third pulley at the central region 65 of thecanopy assembly 12. Theline 60 extends downwardly from the third pulley through thecentral shaft 69 of the canopy, terminating in a knoblike handle 70 (FIG. 3). A plurality ofstretchers 74 extend upwardly from therunner 72 to engage theumbrella ribs 16 in the conventional manner. - The
line 60 is a flexible tension member made of any suitable material having sufficient flexibility and tensile strength for the purpose. For example, the line may be a wire cable or a cord woven of any suitable synthetic material. The winder hub is connected to a crank 78 extending outside thehousing 37, for winding or unwinding the line. The winder may include a mechanical lock equipped with a release control mounted on thecollar 43, operative to preventing winding or unwinding the line unless the lock is disengaged. Details of such locks and winding hubs are known to those skilled in the art. - With particular reference now to FIGS. 3 and 4, the
hub 55 defines the center of the canopy assembly. Theribs 16 extend radially outward from thehub 55 and are pivotably attached so as to raise and lower with respect to the hub. Thehub 55 has a central axis (coaxial withcentral shaft 69 of the canopy), and each rib is pivotably mounted to thehub 55 for pivoting motion substantially in a plane that extends through that central axis. - Each
rib 16 is comprised of aninner rib section 16 a and anouter rib section 16 b of approximately equal length arranged in nearly abutting, end-to-end relation. Each pair of inner andouter rib sections rib hinge 80 which connects the rib sections together in pivotable relation, as will be more fully described below. - The structure of the
rib sections rib hinge housing 81, a generally rectangular tubular component havingside walls 82, abottom wall 84, and a partialtop wall 86. The forward and rearward ends 88, 90 of therib hinge housing 81 are open, as is the major portion of the top 92 of the housing beginning at theforward end 88. The dimensions of therib hinge housing 81 are such that an end of arib section - FIGS. 6-10 show the manner in which the
rib sections rib hinge housing 81. First, as shown in FIG. 6, an end of anouter rib section 16 b is introduced into therearward end 90 of therib hinge housing 81 and beneath the partialtop wall 86. The outer rib section is then welded in place. Next, as shown in FIG. 7, the rearward end of aninner rib section 16 a is introduced into theforward end 88 of therib hinge housing 81 and advanced to a location slightly spaced apart from the forward end of theouter rib section 16 b, as depicted in FIG. 8. Then, as shown in FIG. 9, ahole 94 is drilled through theside walls 82 and through the rearward end of theinner rib section 16 a. Finally, as shown in FIG. 10, ahinge pin 96 is inserted through thehole 94 in theside walls 82 and the rearward end of theinner rib section 16 a to pivotably mount the inner rib section to therib hinge housing 81. Thehinge pin 96 is secured with a nut, cotter pin, or other suitable means for maintaining the hinge pin within thehole 94. - Operation of the hinged
ribs 16 to relieve pressure and avoid breakage of the ribs in the event of high winds will now be explained with reference to FIGS. 11 and 12. FIG. 11 shows arib 16 in its normal position. Eachinner rib section 16 a is supported from the upper hub 55 (FIGS. 3 and 4). Eachouter rib section 16 b is pivotably supported from the lower end of a correspondinginner rib section 16 a by way of arib hinge 80. Therib hinge 80 is permanently affixed to theouter rib section 16 b such as by welding, and the rib hinge is pivotably attached to the outer end of theinner rib section 16 a by way of thehinge pin 96. Thebottom wall 84 of thehousing 81 extends beyond and parallel to thelower edge 98 b of theouter rib section 16 b and is positioned to confront thelower edge 98 a of theinner rib section 16 a to prevent further rotation of theouter rib section 16 b in the clockwise direction as seen in FIG. 11, thereby maintaining the outer rib section in longitudinal alignment with theinner rib section 16 a. With theribs 16 mounted to thehub 55, eachouter rib section 16 b is mounted to its associatedinner rib section 16 a for pivoting movement substantially in a plane that extends through the central axis of the hub (coaxial with thecentral shaft 69 of the canopy, as previously explained). - When wind pressure underneath the
canopy 12 builds up to a predetermined level, the force, indicated by thearrow 100, will overcome the weight of the canopy and theouter rib section 16 b and cause the outer rib section to pivot upward, as shown in FIG. 12. Thehousing 81 rotates counterclockwise on thepivot pin 96, as seen in FIG. 12. The lower end of theinner rib section 16 a clears through the top 92 of thehousing 81 of therib hinge 80. This pivoting action removes the tension from thecanopy 12 and allows trapped air beneath the canopy to escape, relieving the pressure. - Once the winds pass, the user can return the umbrella to its normal operating condition by simply pulling each
outer rib section 16 b downward against the tension of thecanopy 12 until it has returned to its normal position. When thebottom wall 84 of thehousing 81 rotates into confrontation with thebottom edge 98 a of theinner rib section 16 a, further rotation of theouter rib section 16 b is prevented. In this position theouter rib section 16 b is in longitudinal alignment with its correspondinginner rib section 16 a. - FIGS. 13 and 14 illustrate an alternate embodiment of a
rib hinge 180 comprising the identical components hereinabove described but arranged in a different manner. The rib hingehousing 81 is reversed, with the end of theinner rib section 16 a being inserted into therearward end 90 of the housing and welded in place. The adjacent end of theouter rib section 16 b is introduced into theforward end 88 of thehousing 81 and held in place by thepivot pin 96. When theforce 100 exerted by the wind is sufficient to overcome the weight of the canopy and theouter rib section 16 b, the outer rib section pivots in a counterclockwise direction as viewed in FIG. 14. Thehousing 81 remains fixed, and theouter rib section 16 b pivots upward through theopening 92 in the housing. When the force has been removed, theouter rib section 16 b can be returned to its original position by rotating it clockwise as seen in FIG. 14 until thelower edge 98 b of the outer rib section confronts thelower wall 84 of thehousing 81, in which location the inner andouter rib sections - It will be noted that regardless of the orientation of the
housing 81, the rib hinges 80, 180 each provide two functions: they hinge theouter rib section 16 b with respect to theinner rib section 16 a, and they provide a stop that longitudinally aligns theouter rib section 16 b with theinner rib section 16 a. It will be appreciated that these two functions are independent, however, and can be carried out by two separate devices without departing from the scope and spirit of the disclosed invention. - The foregoing embodiments have been disclosed with respect to
ribs 16 that are substantially straight in profile, such that the inner andouter rib sections - The hinged rib arrangement provides significant advantages. First, the ribs will collapse and not break under wind loads that would bend or break the ribs of conventional umbrellas. Second, the greatest load exerted on conventional umbrella ribs is that of wind loading coming from underneath the umbrella. By eliminating the need for the umbrella ribs to withstand such loads without bending or breaking, the ribs can be made of lower strength material, which is less expensive.
- While the foregoing embodiment has been disclosed with respect to a side-mast umbrella, in which the hub that supports the ribs and canopy is supported offset with respect to the mast, it will be understood that the hinged rib design is equally applicable to a conventional umbrella design in which the hub is supported coaxial with the mast.
- Finally, it will be understood that the preferred embodiment has been disclosed by way of example, and that other modifications may occur to those skilled in the art without departing from the scope and spirit of the appended claims.
Claims (5)
1. An umbrella, comprising:
a mast;
a hub supported by said mast;
a plurality of ribs extending radially outward from said hub; and
a canopy supported by said ribs,
wherein each of said ribs comprises
an inner rib section having an inner end mounted to said hub and an outer end;
an outer rib section having an inner end pivotably mounted to said outer end of said inner rib section; and
stop means engageable by one of said inner and outer rib sections for limiting pivotable movement of said outer rib section with respect to said inner rib section such that when said stop means is engaged, said inner rib section and said outer rib section are in predetermined alignment;
whereby when wind pressure underneath said canopy reaches a predetermined level, said outer rib sections are pivoted upward with respect to said inner rib sections, thereby relieving said wind pressure underneath said canopy.
2. The umbrella of claim 1 , further comprising a housing fixedly mounted to said outer end of said inner rib section, and
wherein said inner end of said outer rib section being pivotably mounted to said outer end of said inner rib section comprises said inner end of said outer rib section being pivotably mounted to said housing; and
wherein said stop means engageable by one of said inner and outer rib sections for limiting pivotable movement of said outer rib section with respect to said inner rib section comprises a wall of said housing extending beyond and parallel to a bottom wall of said inner rib section and being disposed to be engaged by a bottom wall of said outer rib section when said outer rib section pivots into a position that is in predetermined alignment with said inner rib section.
3. The umbrella of claim 3 , wherein said position in which said outer rib section is in predetermined alignment with said inner rib section is a position in which said outer rib section is substantially longitudinally aligned with said inner rib section.
4. The umbrella of claim 1 , further comprising a housing fixedly mounted to said inner end of said outer rib section, and
wherein said inner end of said outer rib section being pivotably mounted to said outer end of said inner rib section comprises said housing being pivotably mounted to said outer end of said inner rib section; and
wherein said stop means engageable by one of said inner and outer rib sections for limiting pivotable movement of said outer rib section with respect to said inner rib section comprises a wall of said housing extending beyond and parallel to a bottom wall of said outer rib section and being disposed to be engaged by a bottom wall of said inner rib section when said outer rib section pivots into a position that is in predetermined alignment with said inner rib section.
5. The umbrella of claim 3 , wherein said position in which said outer rib section is in predetermined alignment with said inner rib section is a position in which said outer rib section is substantially longitudinally aligned with said inner rib section.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US10/389,395 US20040177871A1 (en) | 2003-03-14 | 2003-03-14 | Umbrella with two-piece, pivotable ribs to prevent wind damage |
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US10/389,395 US20040177871A1 (en) | 2003-03-14 | 2003-03-14 | Umbrella with two-piece, pivotable ribs to prevent wind damage |
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US20040177871A1 true US20040177871A1 (en) | 2004-09-16 |
Family
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US10/389,395 Abandoned US20040177871A1 (en) | 2003-03-14 | 2003-03-14 | Umbrella with two-piece, pivotable ribs to prevent wind damage |
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US7182042B1 (en) * | 2003-08-27 | 2007-02-27 | Anderson Charles H | Support pole with pipe-hinge slide lock |
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