US3693642A - Rib assembly for folding umbrella - Google Patents

Rib assembly for folding umbrella Download PDF

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Publication number
US3693642A
US3693642A US16680A US3693642DA US3693642A US 3693642 A US3693642 A US 3693642A US 16680 A US16680 A US 16680A US 3693642D A US3693642D A US 3693642DA US 3693642 A US3693642 A US 3693642A
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US
United States
Prior art keywords
rib
umbrella
receiving
center rod
quadrilateral
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.)
Expired - Lifetime
Application number
US16680A
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English (en)
Inventor
Nobutoshi Kida
Kazo Saito
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Individual
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Individual
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Filing date
Publication date
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Application granted granted Critical
Publication of US3693642A publication Critical patent/US3693642A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • A45B25/00—Details of umbrellas
    • A45B25/16—Automatic openers, e.g. frames with spring mechanisms

Definitions

  • ABSTRACT A rib assembly for a folding umbrella which comprises a support rib, a receiving rib, an end rib and a connecting rib which are so assembled that they are adapted to form a quadrilateral in the open position of umbrella, said receiving rib being adapted to be held at substantially right angles with a center rod of the umbrella in said open position, one or more corners of said quadrilateral being made slidable and/or one or more sides of said quadrilateral being made contractile and extensible, thereby enabling the length of at least one side of the quadrilateral to be varied.
  • a folding umbrella which comprises a support rib, a receiving rib, an end rib and a connecting rib which are so assembled that they are adapted to form a quadrilateral in the open position of umbrella, said receiving rib being adapted to be held at substantially right angles with a center rod of the umbrella in said open position, one or more corners of said quadrilateral being made slidable and/or one or more sides of said quadri
  • This invention relates to a rib assembly for a folding umbrella, and more particularly to a rib assembly for a folding umbrella comprising a receiving rib, a support rib, an end rib and a connecting rib which are adapted to form a quadrilateral in the open position while the receiving rib is held at substantially right angles with a center rod of the umbrella.
  • the conventional folding umbrella of such kind which is commercially available has such rib structure that in the open position of umbrella, the receiving rib is held at an acute angle to the center rod.
  • a considerably strong force is needed at the end of opening operation, which has made the umbrella of this type unsuitable for ladies and children.
  • the rib assembly should be so constructed that the receiving rib is held at substantially right angles with the center rod in the open position of umbrella.
  • an object of the present invention ro provide a rib assembly for a folding umbrella which overcomes the shortcomings in the prior art as discussed above.
  • a rib assembly for a folding umbrella which comprises a support rib, a receiving rib, an end rib and a connecting rib which are so assembled as adapted to form a quadrilateral when the umbrella is opened, said receiving rib being adapted to be held at substantially right angles with a center rod in the open position of the umbrella and a slide means which is provided at a comer of the quadrilateral or at an intermediate portion of a side of quadrilateral for making variable the length of at least one side of the quadrilateral, thereby enabling the rib assembly to be neatly folded when the umbrella is closed.
  • FIG. 1 is a diagrammatical side view of a rib assembly according to the present invention, showing the open position thereof;
  • FIG. 2 is a diagrammatical side view of the rib assembly of FIG. 1, showing the closed position thereof;
  • FIG. 3A is a view explaining the dynamics of a rib assembly in which a receiving rib is adapted to be held at substantially right angles with a center rod in the open position;
  • FIG. 3B is a view explaining the dynamics of a rib assembly in which a receiving rib is adapted to be held at an acute angle to a center rod in the open position.
  • FIGS. 1 and 2 like parts or portions are designated with like reference numerals.
  • FIG. 3A in which a receiving rib a is at a substantially right angle to a center rod b in the open position
  • FIG. 3B in which a receiving rib a is at an acute angle to a center rod b in the open position.
  • 0, designates the angle defined by the receiving rib a and the center rod b in FIG. 3A, with 0, being substantially 0, designates the angle defined by the extension line of the receiving rib a and the line normal to the end rib c in FIG. 3A, and 0 0, 90.
  • 0, designates the angle defined by the receiving rib a and the center rod b in FIG. 3B, and 0 is an acute angle.
  • 0 designates the angle defined by the extension line of the receiving rib a and the line normal to the end rib c in FIG. 3B, and 0 0 90.
  • the umbrella can be opened.
  • the present invention has been made to overcome the above-mentioned difficulty.
  • the numeral 1 designates a center rod of well-known multistage telescopic structure.
  • the numeral 2 designates a support rib having its base end 2a pivotally connected to an upper rib holder (not shown) fixed to the center rod 1 at the top end portion thereof.
  • the numeral 3 designates a receiving rib having its base end 3a pivotally connected to a lower rib holder (not shown) which is slidably fitted to the center rod 1.
  • the tip end 2b of said support rib 2 is pivotally connected to the receiving rib 3 at an intermediate portion of the latter.
  • the intersecting point of the receiving rib 3 and the support rib 2 is hereinafter referred to as a pivotal point A.
  • the tip end 3b of the receiving rib 3 is pivotally connected to the end rib near the base end 4a thereof.
  • the intersecting point of the receiving rib 3 of the end rib 4 is hereinafter referred to as a pivotal point B.
  • the numeral 5 designates a connecting rib having one end 5a pivotally connected to the base end 4a of said end rib 4 and the other end 5b pivotally connected to the support rib 2 at its intermediated .portion.
  • the intersecting point of the connecting rib 5 and the support rib 2 is hereinafter referred to as a pivotal point D.
  • the intersecting point of the connecting rib S and the end rib 4 is hereinafter referred to as a pivotal point C.
  • a collapsible sub-rib may be pivotally connected to the tip end of the end rib 4, although not shown in the drawings.
  • the rib assembly is so constructed that the receiving rib 3 is held at a substantially right angle to the center rod 1 in the open position.
  • the contour of the umbrella cloth in the open position becomes substantially arcuate, thereby presenting beautiful appearance as an umbrella.
  • the quadrilateral formed by the four ribs be an irregular one, so that the several ribs adjacent the umbrella cloth form a smooth and continuous line adjacent and below said cover, as clearly seen in FIG.1 and FIG. 2.
  • pivotal point B pivotal point A, C or D may be made slidable as well, or
  • each side of the quadrilateral defined by the support rib 2, the receiving rib 3, the end rib 4 and the connecting rib 5 may be made telescopic by providing a sliding portion. Also more than one sliding portions may be provided. Furthermore, it is noted that it is also possible to make all the pivotal points A, B, C, and D slidable and to make all the sides of quadrilateral telescopic as far as the rib assembly is solidly held in the open position, thereby enabling the umbrella to be more compact when folded.
  • the rib assembly for a folding umbrella which comprises the support rib, the receiving rib, the end rib and the connecting rib which are so arranged that they form a quadrilateral when the umbrella is opened, said receiving rib being adapted to be held at substantially right angles with the center rod in the open position of the umbrella thereby to enable the umbrella to be opened with a little force, and one or more pivotal points of said quadrilateral being made slidable and/or one or more sides of said quadrilateral being made telescopic, thereby making the external appearance of the umbrella beautiful or nice and, at the same time, permitting the umbrella to be collapsed or folded neatly.
  • a folding umbrella having a center rod, an upper rib holder fixedly secured to the center rod directly adjacent the upper end thereof, and a lower rib holder slideably mounted on said center rod intermediate the ends thereof, the improvement in a rib assembly comprising:
  • an elongated substantially straight receiving rib having the inner end thereof pivotally connected to said lower rib holder an elongated substantially straight support rib having the upper end thereof pivotally connected to said upper rib holder, the lower end of said support rib being pivotally connected to said receiving rib at a location disposed intermediate its ends;
  • said support rib, said receiving rib, said end rib and said connecting rib forming a quadrilateral when the umbrella is in an open position and said receiving rib extending at substantially right angles relative to said center rod when the umbrella is in said open position, said quadrilateral having at least one pair of opposed sides which are nonparallel;
  • a rib assembly for a folding umbrella as claimed in claim 1 wherein each of the four corners of said quadrilateral is defined by a pivotal connection between the corresponding pair of said ribs connected at such corner.
  • a rib assembly for a folding umbrella as claimed in claim 3 wherein said slide means is located at at least one of said pivotal connections and includes means for allowing one of the ribs of said corresponding pair of ribs to slide along the other of said ribs of said corresponding pair during closure of said umbrella.
  • a rib assembly for a folding umbrella as claimed in claim 3 wherein at least one of said ribs includes a slideable portion to allow telescoping of said rib to change the length thereof during closure of said umbrella.

Landscapes

  • Walking Sticks, Umbrellas, And Fans (AREA)
  • Tents Or Canopies (AREA)
US16680A 1969-11-14 1970-03-05 Rib assembly for folding umbrella Expired - Lifetime US3693642A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP44090147A JPS4819354B1 (es) 1969-11-14 1969-11-14

Publications (1)

Publication Number Publication Date
US3693642A true US3693642A (en) 1972-09-26

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US16680A Expired - Lifetime US3693642A (en) 1969-11-14 1970-03-05 Rib assembly for folding umbrella

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US (1) US3693642A (es)
JP (1) JPS4819354B1 (es)
DE (1) DE2012025C3 (es)
ES (1) ES184377Y (es)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3850188A (en) * 1972-03-31 1974-11-26 K Saito Folding umbrella
US20030183259A1 (en) * 2002-04-02 2003-10-02 Youth Lee Umbrella without a positioning bow spring

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56130540A (en) * 1980-03-14 1981-10-13 Toshiba Corp Shell structure of electrical instrument

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US177339A (en) * 1876-05-16 Improvement in folding umbrellas
US2649103A (en) * 1951-02-06 1953-08-18 Finkel Umbrella Frame Company Folding umbrella
US3457931A (en) * 1966-08-12 1969-07-29 Yoshio Shimizu Three-step folding umbrella

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE11058C (de) * K. ZIMMERMANN in Odessa Zusammenlegbarer Schirm
DE7342C (de) * Gebrüder DÜLTGEN in Wald bei Solingen Verbessertes Schirmgestell
BE423344A (es) *
US973406A (en) * 1910-04-12 1910-10-18 Stuart J Clark Folding umbrella.
US1797993A (en) * 1929-07-15 1931-03-24 Michaud Lionel Folding umbrella
DE852744C (de) * 1951-01-10 1952-10-16 Rosenkaimer Gmbh Verkuerzbarer Schirm
US3467115A (en) * 1968-02-09 1969-09-16 Robert Brooks Umbrella
DE6905907U (de) * 1968-04-26 1969-08-07 Salvatore Vezzo Metallgestell fuer verkuerzbare regenschirme, insbesondere damenschirme

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US177339A (en) * 1876-05-16 Improvement in folding umbrellas
US2649103A (en) * 1951-02-06 1953-08-18 Finkel Umbrella Frame Company Folding umbrella
US3457931A (en) * 1966-08-12 1969-07-29 Yoshio Shimizu Three-step folding umbrella

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3850188A (en) * 1972-03-31 1974-11-26 K Saito Folding umbrella
US20030183259A1 (en) * 2002-04-02 2003-10-02 Youth Lee Umbrella without a positioning bow spring

Also Published As

Publication number Publication date
ES184377Y (es) 1974-06-01
DE2012025A1 (de) 1971-05-19
JPS4819354B1 (es) 1973-06-13
ES184377U (es) 1973-09-01
DE2012025C3 (de) 1983-03-24
DE2012025B2 (de) 1979-02-22

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