US3780748A

US3780748A - Collapsible umbrella

Info

Publication number: US3780748A
Application number: US00255425A
Authority: US
Inventors: H Weber
Original assignee: Telesco Brophey Ltd
Current assignee: KNIRPS INTERNATIONAL A GERMAN CORP GmbH
Priority date: 1971-05-21
Filing date: 1972-05-22
Publication date: 1973-12-25
Anticipated expiration: 1990-12-25

Abstract

An umbrella having a telescopic stick and each dome rib has three telescopic sections and a parallelogram support structure including a foldable stretcher member hinged midway thereof connected to the dome ribs and to a fixed pivot point on the stick spaced from the crown. A strut member is pivoted to the stretcher members and is hinged to a movable runner on the stick.

Description

United States Patent Weber Dec. 25, 1973 COLLAPSIBLE UMBRELLA 2,775,977 1/1957 Haupt l35/26 1, 4,292 619 4 L' 13 [75] Inventor: Heinz Weber, HIlden, Germany 96 I 3 wmgston 5/26 [73] Assignee: Telesco Brophey Limited, Montreal, FOREIGN PATENTS OR APPLICATIONS Quebec Califi 37,404 11/1886 Germany 135/25 [22] Filed: May 1972 Primary ExaminerJ. Karl Bell 211 Appl. No.: 255,425 Attorney-Alan Swabey [30] Foreign Application Priority Data [57] ABSTRACT May 21, 1971 Germany P 21 25 295.9 umbrella having a telescopic StiCk and each dome rib has three telescopic sections and a parallelogram 52 us. c1 135/20 R pp structure including a foldable stretcher [51] Int. Cl A45b 19/04 ber hinged midway thereof connected t the dome [58] Field of Search 135/20, 26, 25 ribs and to a fixed pivot Point on the Stick Spaced from the crown. A strut member is pivoted to the stretcher [5 R f n e Cited members and is hinged to a movable runner on the UNITED STATES PATENTS Suck- 3,705,593 12/1972 Weber 135/25 4 Claims, 3 Drawing Figures PATENTED 2 51975 3. 7 8O 748 saw 2 0? 2 COLLAPSIBLE UMBRELLA BACKGROUND OF INVENTION 1. Field of Invention The present invention relates to an umbrella and particularly to an umbrella having at least three telescopic dome rib sections hinged to a crown and a telescopic stick.

2. DESCRIPTION OF PRIOR ART In the development of the telescopic umbrella, the aim has been to provide an umbrella which when opened to its fully extended position is as large as conventional umbrellas, but when it is collapsed, it must form the smallest possible package for storage in a lady's purse or in a mans coat pocket.

Recently, an umbrella has been developed which has three telescopic dome rib sections as opposed to the two dome rib sections in a conventional telescopic umbrella, and a unique support structure has been developed wherein a stretcher member is foldable at about its mid-point and hinged at one end to a geats connected to the outer dome rib section and at the other end to an auxiliary runner slidable on the stock. A strut member is hinged to a main runner on the stick and to a pivot point midway of the section of the stretcher members hinged to the auxiliary runner. Finally, to complete the parallelogram structure, a linking member is provided between an extension of the other stretcher section and the strut member at a pivot point spaced from the pivot point of the strut member to the first stretcher section.

Such an umbrella has been found to form a very short and compact package when it is stored and when it is open it provides a suitably large diameter cover. Such an umbrella is considered to be the ultimate in the above-mentioned aims at this stage in the development of the umbrella art. However, the above-described umbrella has many moving parts and is relatively expensive to manufacture.

SUMMARY OF INVENTION It is an aim of the present invention to simplify the design of the so-called three stage umbrella, as described above, by reducing the number of moving parts, and thereby reducing the cost of manufacturing the umbrella.

In accordance with the present invention, an umbrella construction includes a telescopic stick, a crown fixed at one end of the stick, dome ribs hinged to the crown, and each dome rib has three telescopic sections. Stretcher means are hinged at one end to an outer dome rib section and at the other end to a fixed pivot point on the stick spaced from the crown. The stretcher means is foldable midway thereof. A sliding runner is provided on the stick, and a strut member is hinged to the sliding runner and to the section of the stretcher member hinged to the stick. The stretcher section hinged to the dome ribs includes an extension beyond the pivot point of the folding stretcher sections and link means are provided between the strut and the extension of the stretcher section forming a parallelogram linkage therewith.

A further feature of the present invention is to provide a flange on the stick mounting the pivot points of the stretcher members wherein the distance of the pivot points to the flange from the center line of the stick is less than the distance of the hinge points of the dome ribs to the crown from the center line of the stick, such that when the umbrella is folded, the dome ribs do not take up more volume than that defined by the periphery of the crown.

BRIEF DESCRIPTION OF THE DRAWINGS Having thus generally described the nature of the in vention, reference will now be made to the accompanying drawings, showing by way of illustration, a preferred embodiment thereof, and in which:

FIG. I is a fragmentary elevational view of an umbrella frame showing the dome ribs in the fully extended position;

FIG. 2 is a fragmentary elevational view of the umbrella similar to FIG. 1, but showing the dome ribs and supporting structure in a collapsed position; and

FIG. 3 is a fragmentary elevational view of the umbrella frame similar to FIGS. 1 and 2, but showing the dome ribs and supporting structure in a position midway between its closed position and its open position.

DESCRIPTION OF PREFERRED EMBODIMENT The umbrella shown in the drawings includes a telescopic stick 1 comprising telescopic

tubular sections

2 and 3 and a third tubular section (not shown) which normally mounts a handle and which telescopes in the tubular section 3. The stick is locked in its fully extended position by a conventional ball and spring catch There is a main runner 5 which slides on the stick.

At the free end of the tubular section 2, there is fixed a crown 6 to which the dome ribs 7 are hinged. Each dome rib 7 comprises three telescopic sections, including an inner section 711, hinged to the crown; a central section 7b, telescopic within the inner section 7a; and an outer section 7c, telescopic within the central section 7b. Sections 7a and 7b are of U-shaped cross section, while is made out of circular wire form.

The support structure for supporting the dome ribs 7 includes a stretcher member comprising

stretcher sections

8 and 11 pivotable at 14 to fold one on the other. A strut 9 is pivoted at 17 to the stretcher section 8 and at its other end to the main runner 5 slidable on the stock. The stretcher section 8 is hinged at a pivot point 18 on a flange 6' integral with the sleeve 13 which, in turn, is integral with the crown 6. The flange 6' is spaced a distance x from the crown 6.

The stretcher section 1 1 has an extension 1] beyond the pivot point 14 to which a link member 10 is hinged about the pivot point 15 at one end and to the pivot point 16 on the strut 9. The link 10, strut 9, stretcher section 8 and extension 11' form a parallelogram for opening and closing the three stage dome rib 7. The link 10 includes an extension 10' which acts as a spring as shown in FIGS. 1 and 3 for initiating the opening movement of the support structure when the umbrella is being opened.

The stretcher section 1 1 is hinged to a geats 18 which is adapted to slide on the dome rib 7. The dome rib section 70 passes through an end sleeve of the section 7b and is connected to the hinge pin 19 in the geats 18. An aperture 21 is provided in the geats 18 for anchoring the cover-retaining thread when the cover is mounted on the frame.

In operation, when it is required to open the umbrella to a position as shown in FIG. 1 from a position as shown in FIG. 2, the stick is extended fully by pulling on the umbrella handle (not shown). The dome ribs in FIG. 2 are released by either detaching a band holding the cover in a closed position or by loosening ones fingers from about the dome ribs whereby the spring extensions 10' force the parallelogram linkage to open slightly away from the umbrella stick 1, assuming a position somewhat as shown in dotted lines in FIG. 3. The spreading action causes hinge pins 17 to move radially away from the umbrella stick, thus moving the struts and stretcher sections away from the dead-center position. Only a relatively small force need be applied to the main runner 5 to move it towards the crown 6. This movement of the runner 5 spreads the support system causing the dome ribs to pivot upwardly and to simultaneously extend under the force of the parallelogram support structure wherein the link member is acting under tension.

Once the runner has reached a position as shown in FIG. 1, the lock lever 23 engages an aperture in the stick, thereby locking the runner in position. When it is required to close the umbrella, the locking lever 23 is released by depressing it and the main runner is moved towards the handle end of the umbrella stick.

Once the support structure and dome ribs pass the position shown in dotted lines in FIG. 3, the link It) acts in compression to guide the dome rib support stretcher member 11 into a position parallel with the umbrella stick 1 pressing the geats 18, thus telescoping the

dome rib sections

7b and 7c.

In the formation of the flange 6, it is evident that it can 'be a separate piece fixed to the umbrella stick. However, in the present embodiment, it is shown as a molded integral part of the crown 6 and the sleeve 13, which is forced onto the stick 1. It has been found that in the present structure where no movable auxiliary runner is provided and the

stretcher members

8, 11 are hinged to a fixed flange on the stick 1, there is a surprising effect in the inherent spreading action of the support system. The stretcher section 8 is, of course, acting as a pivoting lever towards and away from the stick 1 about a fixed pivot point thereby enhancing the action of the stretcher section 11 pressing the geats 18 outwardly to fully extend the

dome rib sections

7b and 7c.

In view of the fixed pivot point of the stretcher sections 8, it is found that the closing operation is made earlier since the support system is folded soon when the umbrella is being closed with the simultaneous telescoping of the dome ribs 7.

I claim:

1. An umbrella frame having a telescopic stick, a crown at one end of the stick, and dome ribs hinged to the crown; each dome rib comprising at least three telescopic sections, including an inner section hinged to the crown, an intermediate section, and an outer section; a runner slidably mounted on the stick, stretcher means hinged to the stick at a fixed point spaced from the crown and to each outer dome rib section, each stretcher means being foldable at a hinge point; a section of each stretcher means connected to the outer dome rib section having an extension portion beyond the hinge point; strut means hinged to the runner and to the section of each stretcher means hinged to the stick; tension link means connected to the extension of the section of each stretcher means connected to the outer dome rib section, and to the strut member at a point between the connection of the strut member to the stretcher means and the connections of the strut member with the runner; the link means, hinge connections, portions of the strut means and extension portion of the stretcher member connected to the dome rib forming a quadrilateral beneath each stretcher means and being constructed and arranged to apply tension to the link means when the frame is erected.

2. An umbrella frame as defined in claim 1 wherein a flange is fixed to the stick and said first section is pivotally mounted to the flange.

3. An umbrella frame as defined in claim 2 wherein the pivot of the dome ribs to the crown is a greater distance from the axis of the stick than the distance from the pivot of the first stretcher on the flange from the axis of the stick.

4. An umbrella frame as defined in claim 3 wherein the crown is integral with the flange by means of a sleeve fitting on the umbrella stick.