Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS2884052 A
Publication typeGrant
Publication dateApr 28, 1959
Filing dateSep 23, 1957
Priority dateSep 23, 1957
Publication numberUS 2884052 A, US 2884052A, US-A-2884052, US2884052 A, US2884052A
InventorsKlenz Karl A, Lando Ellis A
Original AssigneeLando Products Inc
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Venetian blind construction
US 2884052 A
Abstract  available in
Images(2)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

April 28, 1959 I E. A. LANDO ETAL 2,834,052 I I VENETIAN BLIND CONSTRUCTION Filed- Sept. 25, 1957 ZSheets-Sheet 1 Fig.5

INVENTORS Ellis A. Lando Y Karl A. Klenz 1 39 Attorneys April 1.959 E. A. LANDO E AL I 2,884,052

VENETIAN BLIND CONSTRUCTION Filed Sept. 25, 1957 v 2 Sheets-Sheet. 2

INVENTORS Ellis A. Lando Attorneys Karl A.-KIenz f United States Patent VENETIAN BLIND CONSTRUCTION Ellis A. Lando, Mill Valley, and Karl A. Klenz, San Anselmo, Calif., assignors to Lando Products, Inc., Sausalito, Calif., a corporation of California Application September 23, 1957, Serial No. 685,651

7 Claims. (Cl. 160-168) This invention relates generally to a Venetian blind construction and more particularly to a Venetian blind construction in which the slats can be readily removed and in which the blind can be lifted while it is tilted.

This application is a continuation-in-part of application Serial No. 481,866, filed January 14, 1955, now US. Patent No. 2,838,110, issued June 10, 1958, and entitled Venetian Blind Construction Heretofore in conventional Venetian blind construction, the lift cords have been secured to the bottom rail and threaded through openings in the slats, and have been reeved over pulleys. Since the lift cords pass through the slats, it is impossible to remove the slats from the Venetian blind for cleaning unless the Venetian blind is disassembled. When the lift cords pass through openings in the slats, the lift cords facilitate stacking of the Venetian blind slats when the Venetian blind is raised. How ever, other means must be provided to facilitate the stacking of the slats to prevent the slats from slipping off of the bottom rail.

In general, it is an object of the present invention to provide a Venetian blind construction in which the slats are readily removable for cleaning.

Another object of the invention is to provide a Venetian blind construction of the above character in which means is provided for preventing the slats from slipping off of the bottom rail as the Venetian blind is raised.

Another object of the invention is to provide a Venetian blind construction of the above character which may be raised while the Venetian blind is tilted.

Another object of the invention is to provide a Venetian blind construction in which the means for preventing the slats from slipping oif of the bottom rail collapses with the slats.

Another object of the invention is to provide a Venetian blind construction of the above character in which the means for preventing the slats from slipping off of the bottom rail does not protrude from the Venetian blind.

Additional objects and features of the invention will appear from the following description in which the pre ferred embodiment has been set forth in detail in conjunction with the accompanying drawing.

Referring to the drawing:

Figure 1 is a front elevational view of a Venetian blind construction embodying our invention.

Figure 2 is a cross sectional view taken along the line 2-2 of Figure 3.

Figure 3 is an enlarged front elevational view of a portion of the Venetian blind construction.

Figure 4 is a side elevational view taken along the line 4-4 of Figure 3.

Figure 5 is a view similar to Figure 4 but showing the collection of Venetian blind slats as the Venetian blind is being raised while the slats are in a tilted position.

Figure 6 is a front elevational view of a portion of a Venetian blind incorporating another embodiment of our invention.

2,884,052 Patented Apr. 28, 1959 Figure 7 is a side elevational view taken along the line 7-7 of Figure 6.

Figure 8 is a front elevational view showing a portion of a Venetian blind construction incorporating another embodiment of our invention.

Figure 9 is a side elevational view taken along the line- 9-9 of Figure 8.

In general, the Venetian blind construction embodying our invention consists of a Venetian blind in which the lift cords are pivotally connected to the ends of the bottom rail, and in which cage means are mounted on the bottom rail. The cage means is provided with upwardly extending members which are pivotally mounted relative to the bottom rail and is adapted to be positioned by the lift cords and the cage means serves to prevent the slats from slipping off of the bottom rail.

As illustrated in the drawing, the Venetian blind consists of a plurality of horizontal slats 11 which are supported by a pair of ladder tapes 12 and 13. The lower ends of the ladder tapes are secured to a bottom rail 14 whereas the upper ends of the ladder tapes are secured to a top or head rail 16. The construction of the ladder tapes 12 is conventional and is well known to those skilled in the art. Means (not shown) also well known to those skilled in the art is normally provided for tilting the top rail, the ladder tapes and the Venetian blind slats carried thereby.

Means is provided for raising and lowering the Venetian blind and consists of a pair of lift cords 18 and 19 which have their lower ends pivotally connected to the ends of the bottom rail at a point intermediate the side edges of the bottom rail. As shown in the drawing, the ends of the cords are looped and fastened to pins 21 mounted in the ends of the bottom rail. The lift cords extend upwardly and confront opposite free ends of the slats to hold the slats in place. The cords are reeved over pulleys 23 and 24 mounted adjacent the head rail and terminate in a loop 26 which is used for raising and lowering the Venetian blind in a manner well known to those skilled in the art.

A cage assembly 28 is mounted on each end of the bottom rail and consists of a U-shaped bracket 29 which is fixed to the bottom rail. A pair of spaced members 31 and 32 have lower ends pivotally connected to the bracket 29 as shown in the drawing. The upper ends of the members 31 and 32 are fastened together by a U-shaped tie member 33 which has its outer ends pivotally connected to the members 31 and 32 by suitable means such as the blocks 34. The blocks 34 are fixed to the members 31 and 32 and are provided with openings through which the ends of the U-shaped tie member 33 rotatably extend to permit pivotal movement of the tie member relative to the members 31 and 32. Guide means is carried by the U-shaped tie member 33 and consists of a member'36 which has its opposite ends fixed to the intermediate portion of the U-shaped tie member and bent to provide an opening 37 which accommodates the lift cord.

The members 31 and 32 are provided with bent portions 38 and 39 which accommodate the bottom rail when the bottom rail is tilted as shown in Figure 5 and as hereinafter described. The members 31 and 32 normally extend upwardly at generally right angles to the horizontal plane formed by the bottom rail, and are of such a length that all of the Venetian blind slats can be collected within the cage assembly when the Venetian blind is raised.

Operation of our Venetian blind construction may now be briefly described as follows: As is well known to those skilled in the art, the bottom rail serves to collect the Venetian blind slats as the bottom rail is raised by pulling downwardly on the looped portion 26. In Figure 1, the Venetian blind is shown in a position in which the Venetian blind slats are not tilted and in which the Venetian 3 blind has been only partially opened and only a few of the Venetian blind slats have been collected. Since the lift cords 18 and 19 are normally taut, the pair of lift cords will serve to prevent longitudinal movement of the Venetian blind slats and will prevent the Venetian blind slats from slipping out of the ladder tapes. However, if it is desired to remove the Venetian blind slats for cleaning, it is only necessary to shift one of the lift cords to one side or the other and then pull out the Venetian blind slats. The Venetian blind slats may then be cleaned and reinserted.

Since the bottom end of the lift cords are pivotally connected to the bottom rail, it is readily apparent that the Venetian blind slats can be readily tilted to permit the desired amount of light to pass through the Venetian blind.

When a Venetian blind is raised while it is tilted, the Venetian blind slats will have a tendency to slide ofi of the bottom rail because the bottom rail is also tilted. As shown particularly in Figure 5, the cage assembly 28 provided on each end of the bottom rail serves to collect the slats as they are gathered by the bottom rail and prevents the slats from slipping off of the bottom rail. Thus, the Venetian blind can be readily raised while the slats are still tilted. It will be noted that when the Venetian blind is tilted the cage assembly collapses with the Venetian blind slats and does not protrude from the Venetian blind.

It is readily apparent that the cage assemblies also serve to facilitate collection of the Venetian blind slats even though the Venetian blind is not tilted as shown particularly in Figure 4. Thus, the cage assemblies 28 prevent lateral movement of the slats relative to the bottom rail but permit ready removal of the slats for cleaning. It will be noted that the members 31 and 32 are maintained in a proper position by the lift cord which passes through the opening 37 provided in the U-shaped tie member 33. Thus it can be seen that the cage as semblies 28 are similar to parallelogram means, and always maintain the members 31 and 32 in a vertical position.

Another embodiment of our invention is illustrated in Figures 6 and 7 in which cage assemblies 42 are pivotally mounted on the pins 21 at opposite ends of the bottom rail 14. The cage assemblies 42 are formed of suitable material such as wire and consist of upper and lower U-shaped portlons 43 and 44 which have their ends joined by Straight portions 46. The upper U-shaped portion 43 is provided with a loop 47 in its intermediate portion which is adapted to accommodate the lift cord fastened to the pin 21. The U-shaped portion 44 is provided with a loop 48 intermediate its ends which is rotatably mounted on the pin 21 and permits pivotal movement of the cage assembly 42 relative to the bottom rail. The loop 47 in the upper U-shaped portion 43 serves to maintain the cage assembly in the proper position. The operation of this embodiment of our Venetian blind construction is substantially identical with that of the embodiment shown in Figures 1 to except that the cage assemblies do not collapse with the Venetian blind slats as they are tilted.

Another embodiment of our invention is shown in Figures 8 and 9 and consists of cage assemblies 51 which are mounted on opposite ends of the bottom rail 14. However, in this embodiment of our invention, the bottom rail is shown formed of metal rather than wood as in the previous embodiments. The cage assemblies 51 consist of a sleeve 52 which has the same configuration as the bottom rail and which is adapted to be slipped over the end of the bottom rail. The sleeve can be formed of any suitable material such as plastic. The sleeve 52 forms a rather tight fit with the end of the bottom rail and an insert 53 of suitable material such as metal is mounted within that portion of the bottom rail covered by the sleeve 52 to prevent collapse of the bottom .rail and also .4 to prevent the sleeve from slipping off of the end of the bottom rail.

The insert 53 is secured to the sleeve 52 by suitable means such as a screw 54 which is threaded through a member 56 and through the sleeve 52 into the insert 53. The lower end of the lift cord is pivotally connected to the sleeve 52 by suitable means such as a screw 57 which extends through the member 56 and is threaded into the insert 53. A pair of members 555 and 59 have their lower ends pivotally connected to the side margins of the sleeve 52 by suitable means such as the pin connection shown. The upper ends of the members 58 and 59 are fastened together by a U-shaped tie member 61 which has its ends pivotally connected to the members 58 and 59 by pins 62 which are pivotally mounted in the members 58 and 59 and have their ends fixed in the outer ends of the tie member 61. A guide member 63 is pivotally connected to intermediate portion of the U-shaped tie member 61 by pin 64. The guide member is provided with an opening which accommodates the lift cord.

Operation of this embodiment of our invention is substantially identical to that 'hereinbefore described. Mounting the lift cords at the ends of the bottom rail permits removal of the Venetian blind slats for cleaning. The cage assemblies 42 prevent the slats from slipping off of the bottom rail when the Venetian blind is raised.

It is apparent from the foregoing that our Venetian blind construction permits the ready removal of Venetian blind slats for cleaning. The cage assemblies prevent the Venetian blind slats from slipping off of the bottom rail as the Venetian blind is raised and lowered. The cage assemblies are relatively compact and unobtrusive and do not detract from the appearance of the Venetian blind nor do they protrude from the Venetian blind as the Venetian blind is raised and lowered.

We claim:

1. In a Venetian blind construction, a top tilting rail, a bottom rail, ladder tapes connecting said rails, a plu rality of Venetian blind slats supported by said ladder tapes, means for raising and lowering the bottom rail, said means including a pair of lift cords having their lower ends connected to the opposite ends of the bottom rail, and cage means mounted on opposite ends of the bottom rail, the cage means including a pair of members pivotally mounted relative to the bottom rail and extending upwardly from the bottom rail, and guide means engaging the lift cord and pivotally connected to said pair of members, the lift cord serving to maintain said members in a substantially vertical position as the bottom rail is tilted, said members serving to prevent the Venetian blind slats from slipping off of the bottom rail as the bottom rail is raised and lowered.

2. A Venetian blind construction as in claim 1, wherein said guide means includes a U-shaped member having its outer ends pivotally connected to said pair of members.

3. In a Venetian blind construction, a top tilting rail, a bottom rail, ladder tapes connecting said rails, a. plurality of slats supported by said tapes, means for raising said bottom rail, said means including lift cords connected to the ends of the bottom rail intermediate the side edges of the bottom rail, the vertical portions of the lift cords being disposed at and confronting the opposite free ends of the slats, and cage means mounted on each end of the bottom rail to prevent the slats from slipping off of the bottom rail as the Venetian blind is raised and lowered, said cage means consisting of a pair of vertical members, means mounted on the bottom rail and pivotally connected to the lower ends of said pair of members, a U-shaped tie member having its outer ends pivotally connected to the upper portions of said pair of members, the axes of pivot of said members being parallel to the longitudinal axis of the bottom rail, and guide means accommodating one of said lift cords and mounted on said U-shaped member, said guide means serving to maintain said pair of members in a substantially vertical position as the bottom rail is tilted.

4. A Venetian blind construction as in claim 3 wherein the pivotal connections for the lower ends of said pair of members are provided adjacent the side edges of the bottom rail.

5. A Venetian blind construction as in claim 3 wherein the means mounted on the bottom rails comprises sleevelike members having a configuration similar to a section of the bottom rail and slidable onto the ends of the bottom rail.

6. In a Venetian blind construction, a top tilting rail, a bottom rail, ladder tapes connecting said rails, a plurality of Venetian blind slats supported by said ladder tapes, means for raising and lowering the bottom rail, said means including a pair of lift cords having their lower ends connected to the opposite ends of the bottom rail, and cage means mounted on opposite ends of the bottom rail, the cage means including a pair of members pivotally mounted relative to the bottom rail and extending upwardly from the bottom rail, the axes of pivot of said members being parallel to the longitudinal axis of the bottom rail, and guide means engaging the lift cord and pivotally connected to said pair of members, the lift cord serving to maintain said members in a substantially vertical position as the bottom rail is tilted, said members serving to prevent the Venetian blind slats from slipping ofi of the bottom rail as the bottom rail is raised and lowered.

7. In a Venetian blind construction, a top tilting rail, a bottom rail, ladder tapes connecting said rails, a plurality of slats supported by said tapes, means for raising and lowering said bottom rail, said means including lift cords connected to the ends of the bottom rail intermediate the side edges of the bottom rail, the vertical portions of the lift cords being disposed at and confronting the opposite free ends of the slats, and cage means mounted on each end of the bottom rail to prevent the slats from slipping off of the bottom rail as the Venetian blind is raised and lowered, said cage means consisting of a pair of substantially vertical members, a sleeve-like member slidably mounted over the end of the bottom rail, an insert mounted within the end of the bottom rail, means connecting the sleeve-like member to the insert to secure the same to the bottom rail, said means mounted on the bottom rail being pivotally connected to the lower ends of said pair of members, a U-shaped tie member having its outer ends pivotally connected to the upper portions of said pair of members, and guide means accommodating said lift cord and mounted on said U-shaped member, said guide means serving to maintain said pair of members in a substantially vertical position as the bottom rail is tilted.

References Cited in the file of this patent UNITED STATES PATENTS

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2242697 *Feb 27, 1940May 20, 1941Leonardo DucaAwning
US2266479 *Jul 3, 1940Dec 16, 1941Stahl Thomas JVenetian blind
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3276511 *Jun 15, 1964Oct 4, 1966Joseph ArmeniaVenetian blind
US5655590 *May 18, 1995Aug 12, 1997Bryant; David C.Window blind with storage rail
US5765621 *May 17, 1996Jun 16, 1998Bryant; David C.Window blind with storage rail
US6648049Dec 19, 2001Nov 18, 2003David C. BryantCord lock and method for adjusting the length of a window blind assembly
US6994143 *Mar 21, 2003Feb 7, 20063 Day Blinds, Inc.Child safety blind
US7225850 *Jul 27, 2005Jun 5, 20073 Day Blinds, Inc.Child safety blind
US8096340Aug 26, 2009Jan 17, 20123 Day Blinds CorporationChild safety blind
US20130160954 *Feb 20, 2013Jun 27, 2013Robert E. Bolton, IIIWindow shade
WO1996036787A1 *May 17, 1996Nov 21, 1996David C BryantWindow blind with storage rail
Classifications
U.S. Classification160/168.10R, 160/178.10R
International ClassificationE06B9/388, E06B9/38
Cooperative ClassificationE06B9/388
European ClassificationE06B9/388