ROTARY CABINET ASSEMBLY
United States Patent 3868156
A rotary shelf unit is adapted for installation opposite an opening at the corner junction of intersecting cabinets. Upper and lower bearing brackets position a rotor having one or more shelves, and also having intersecting panels forming a closure to the cabinet opening in one angular position of the rotor. The closure panels have sufficient freedom of vertical movement within the opening to accommodate the axial travel of a follower engaging a cam on the lower bearing bracket, which utilizes the weight of the rotor to hold the angular position corresponding to closure of the cabinet opening. The bearing brackets having locating means engageable with components of the cabinet structure, and the rotor is provided with journal brackets having locating means for accurate placement with respect to the closure panels.
US Patent References:
Medicine cabinet
Svalland - May 1933 - 1908797
Rotary shelf cabinet
Bailey - October 1951 - 2570747
Catch unit for relatively movable members
Merydith - April 1954 - 2676082
Demountable revolving shelf assembly for kitchen cabinets and the like
Jorgensen - January 1957 - 2777585
Revolving shelf mounting assembly
Hoffman - February 1962 - 3019912
Medicine cabinet
Svalland - May 1933 - 1908797
Rotary shelf cabinet
Bailey - October 1951 - 2570747
Catch unit for relatively movable members
Merydith - April 1954 - 2676082
Demountable revolving shelf assembly for kitchen cabinets and the like
Jorgensen - January 1957 - 2777585
Revolving shelf mounting assembly
Hoffman - February 1962 - 3019912
Application Number:
05/355964
Publication Date:
02/25/1975
Filing Date:
04/30/1973
View Patent Images:
Export Citation:
Assignee:
Lescoa, Inc. (Grand Rapids, MI)
Primary Class:
Other Classes:
211/144, 16/318
International Classes:
A47B49/00; A47B81/00; A47B49/00
Field of Search:
312/238 211/144 16/153
US Patent References:
| 3160453 | Rotating dor and shelf for corner cabinets and the like | December 1964 | Tassell | |
| 3260560 | Lock for rotating shelf | July 1966 | Hofstetter | |
| 3281197 | Roller assembly for positioning corner shelf hardware | October 1966 | Anderson | |
| 3722031 | DOOR CLOSING AND CHECK DEVICE FOR REFRIGERATORS, FREEZERS AND THE LIKE | March 1973 | Bourgeois |
Primary Examiner:
Frazier, Roy D.
Assistant Examiner:
Aschenbrenner, Peter A.
Attorney, Agent or Firm:
Morse, Glenn B.
Claims:
I claim
1. A rotary shelf and closure panel assembly for use in a corner structure having top and bottom panels and means defining two vertical faces of said structure extending between said upper and lower panels and at right angles to one another, each of said faces having an opening extending from the line of intersection of said faces and said means including upper and lower frontal components extending, respectively, across the upper and lower edges of said openings and projecting, respectively, below said top panel and above said bottom panel, comprising:
1. A rotary shelf and closure panel assembly for use in a corner structure having top and bottom panels and means defining two vertical faces of said structure extending between said upper and lower panels and at right angles to one another, each of said faces having an opening extending from the line of intersection of said faces and said means including upper and lower frontal components extending, respectively, across the upper and lower edges of said openings and projecting, respectively, below said top panel and above said bottom panel, comprising:
Description:
BACKGROUND OF THE INVENTION
Cabinets extending along intersecting walls inevitably produce a corner space that is very difficult to utilize with fixed structure. Kitchen cabinets provide a common illustration of this problem, particularly when it is desirable to maintain the continuity of counter-top surfaces in the junction area. It is common practice to utilize this corner space by installing a rotary cabinet unit opposite an opening disposed in the intersecting planes defined by the outer surfaces of the cabinets at the vertical line of intersection. The opening thus extends from this line laterally for an equal distance along each of the frontal cabinet surfaces.
The rotary units are commonly installed opposite these openings for rotation on a vertical axis, and are usually provided with some sort of cam and follower means to establish a tendency for the rotor to align itself so that the closure panels are correctly placed in the cabinet opening. These cam arrangements have been designed either to utilize the effect of the weight of the rotor as a force urging a follower against a cam having contour in the axial direction, or a spring-loaded detent is used in bearing engagement against a cam oriented in any convenient direction.
Installations of this type are in such wide use that current development centers in the saving of cost in manufacture and installation. The components of the assembly must not only be installed easily in the cabinet structure, but must provide proper relative alignment without careful attention on the part of the installing workman. Since the closure panels of the rotary assembly are normally made by the manufacturer of the cabinet structure, with the hardware being supplied from a different source, the alignment problem is more severe than would be the case if the entire unit were produced under the control of a single manufacturer.
SUMMARY OF THE INVENTION
A rotary cabinet assembly is designed as a set of hardware components adapted for installation on cabinet structure which includes intersecting panels adapted for placement in an opening in the junction of the front cabinet surfaces. The closure panels not only function as a rotary door, but also as a beam having an angular cross section (on a horizontal plane) providing the structural strength of the rotor assembly. Upper and lower journal brackets are secured to this beam, and bearing brackets are installed in the upper and lower components of the cabinet structure. Both the journal and the bearing brackets are provided with means interfitting with the associated cabinet components for proper relative location of the vertical axis of rotation of the rotor. Interengaging cam and follower means are provided on lower journal and bearing brackets inducing a small vertical motion of the rotor as it revolves around its axis. The weight of the rotor is thus utilized as a means of placing the rotor with the closure panels properly located with respect to the cabinet opening.
DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of the junction at the corner of intersecting cabinet installations, with the closure panels of the rotor unit occupying the opening in closed position.
FIG. 2 is a perspective view of the rotor assembly as it occupies the opening in the position shown in FIG. 1 showing the immediately surrounding fixed cabinet structure.
FIG. 3 is an exploded view on an enlarged scale showing the lower journal and bearing assemblies, and the associated cam and follower means.
FIG. 4 is a perspective view on an enlarged scale over FIG. 1 and 2, and illustrating the upper journal and bearing components.
FIG. 5 is a view on an enlarged scale of the retractable upper journal unit.
FIG. 6 is an exploded view of the components of the upper journal and bearing sections.
FIG. 7 is an exploded view showing the components of the lower journal and bearing sections, together with the lower shelf structure.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to FIGS. 1 and 2, the cabinet sections 10 and 11 extend along intersecting walls, producing a line of junction indicated at 12 of the outer cabinet surfaces 13 and 14. An opening in this junction area has portions indicated at 15 and 16 disposed in planes intersecting at an angle close to 90 degrees. The rotary shelf unit has intersecting panels 17 and 18 adapted to enter the junction opening. These closure panels are secured together at their junction to form a solid structural beam. The fixed cabinet structure includes a top 19 and a bottom 20 which the rotor assembly is positioned and supported.
The upper bearing bracket 21 has a base 22 normally secured to the corner block 23 of the fixed cabinet structure by screws as indicated at 24 and 25. The cone-shaped portion 26 of the bracket 21 is "drawn" from material integral, and originally coplanar, with the base 21. An inwardly-turned sleeve 27 forms the actual bearing. The base 22 has a "V"-shaped extension 28 adapted for interengagement with the junction of the frontal components 29 and 30 of the fixed cabinet structure for accurate location of the axis of the bearing 27 with respect to the junction opening.
The upper journal bracket 31 is provided with the opposite tabs 32 and 33 disposed in perpendicular relationship, with these tabs being received solidly against the closure panels 17 and 18, respectively, and secured by screws as shown at 35. The opposite extremity of the bracket 31 has upper and lower plates 35 and 36 provided with openings for slidably receiving the journal pin 37. This pin has a flange 38 limiting the upward movement of the pin 37 under the action of the compression spring 39. A knurled portion 40 on the pin 37 provides a handle that can be grasped to pull the journal pin 37 downward to disengage the journal 41 from the bearing 27. The installation of the journal 41 into the bearing 27 can be accomplished by using the conical surface 26 as a cam with respect to lateral forces generated by pushing the rotor assembly against the surface 26. This interaction will establish a tendency to retract the pin 37 to permit the entrance of the journal 41 into the bearing 27.
At the lower extremity of the assembly, the bearing bracket generally indicated at 42 has a base 43 provided with a V-shaped extension 44 for interengagement with the junction of the lower frontal components 45 and 46 of the fixed cabinet structure. The bases 22 and 43 are provided with holes 22a and 43a to receive screws securing these units to the cabinet structure. A bearing section 47 is secured to the base 43, and has an axially facing cam surface 48 engaged by the follower 49 secured to the rotor assembly to establish a tendency for the rotor to assume a closed position as shown in FIGS. 1 and 2. The unit 50 also functions as a journal bracket providing the journal extension 51 normally received in the bearing opening 52. A central cylindrical portion 53 on the bracket unit 50 is received within the opening 54 in the dish-shaped plate 55 of the lower rotor tray. This tray is completed by the presence of the flat plate 56, with the vertical extent of the cylindrical portion 53 being sufficient to extend across the distance between the plates 55 and 56 at the center of the assembly. The plate 55 is essentially conical in configuration, with a rim portion 57 bearing directly on the underside of the plate 56, and preferably spot-welded to it to form a rigid structure. The top surface of the cylindrical portion 53 extends only to the underside of the panel 56, with the central threaded hole 58 being opposite the elongated hole 59 in the plate 56. A screw 60 traverses the hole 59, and engages the threaded hole 58 to lock the unit 50 rotatively and within the range of lateral adjustment provided by the elongated hole 59. The opening 54 is sufficiently larger than the cylindrical portion 53 to accomodate this range of lateral adjustability. In the installed position, the shoulder 61 of the bracket unit 50 will bear against the underside of the conical plate 55.
The location of the journal bracket 50 with respect to the closure panels 17 and 18 is provided by the flanges 62-63 on the plate 55 and 64-65 on the plate 56. The flanges 64-65 bear against the outer surfaces of the flanges 62 and 63, with the inner surfaces of the flanges 62 and 63 bearing against the panels 17 and 18 to establish the locating function. The holes 66 and 67 of the flange 63 are in alignment with the holes 68 and 69 of the flange 65, and the holes 70 and 71 of the flange 62 are in alignment with the holes 72 and 73 of the flange 64. Screws as shown at 74 are installed through these aligned openings to secure the relative position of the components with respect to the panels 17 and 18. These screws also establish a solid transfer of stresses between the assembled panels 55-56 and the closure panels 17 and 18. Additional tray components of standard configuration as shown at 75 may be installed along the vertical extent of the panels 17 and 18 as desired.
The installation of the rotor assembly into the fixed structure of the cabinet is accomplished preferably by the retracting the pin 37 after the lower journal 51 has been engaged with the bearing opening 52. When the assembly has been thus completed, the lateral placement of the lower portion of the assembly, as well as the rotary position of the panels 17 and 18 with respect to the cam and follower system are secured by tightening the screw 60 against the lock washer 76, with attention being given to the proper lateral placement of the assembly within the junction opening in the cabinet. In the design of the panels 17 and 18, it must be noted that sufficient clearance should be established within the corner opening of the fixed cabinet structure to accommodate the vertical travel of the cam follower 49 with respect to the cam surface 48. With the usual weight to be expected, this travel will not normally need to be much in excess of an eighth of an inch.
Cabinets extending along intersecting walls inevitably produce a corner space that is very difficult to utilize with fixed structure. Kitchen cabinets provide a common illustration of this problem, particularly when it is desirable to maintain the continuity of counter-top surfaces in the junction area. It is common practice to utilize this corner space by installing a rotary cabinet unit opposite an opening disposed in the intersecting planes defined by the outer surfaces of the cabinets at the vertical line of intersection. The opening thus extends from this line laterally for an equal distance along each of the frontal cabinet surfaces.
The rotary units are commonly installed opposite these openings for rotation on a vertical axis, and are usually provided with some sort of cam and follower means to establish a tendency for the rotor to align itself so that the closure panels are correctly placed in the cabinet opening. These cam arrangements have been designed either to utilize the effect of the weight of the rotor as a force urging a follower against a cam having contour in the axial direction, or a spring-loaded detent is used in bearing engagement against a cam oriented in any convenient direction.
Installations of this type are in such wide use that current development centers in the saving of cost in manufacture and installation. The components of the assembly must not only be installed easily in the cabinet structure, but must provide proper relative alignment without careful attention on the part of the installing workman. Since the closure panels of the rotary assembly are normally made by the manufacturer of the cabinet structure, with the hardware being supplied from a different source, the alignment problem is more severe than would be the case if the entire unit were produced under the control of a single manufacturer.
SUMMARY OF THE INVENTION
A rotary cabinet assembly is designed as a set of hardware components adapted for installation on cabinet structure which includes intersecting panels adapted for placement in an opening in the junction of the front cabinet surfaces. The closure panels not only function as a rotary door, but also as a beam having an angular cross section (on a horizontal plane) providing the structural strength of the rotor assembly. Upper and lower journal brackets are secured to this beam, and bearing brackets are installed in the upper and lower components of the cabinet structure. Both the journal and the bearing brackets are provided with means interfitting with the associated cabinet components for proper relative location of the vertical axis of rotation of the rotor. Interengaging cam and follower means are provided on lower journal and bearing brackets inducing a small vertical motion of the rotor as it revolves around its axis. The weight of the rotor is thus utilized as a means of placing the rotor with the closure panels properly located with respect to the cabinet opening.
DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of the junction at the corner of intersecting cabinet installations, with the closure panels of the rotor unit occupying the opening in closed position.
FIG. 2 is a perspective view of the rotor assembly as it occupies the opening in the position shown in FIG. 1 showing the immediately surrounding fixed cabinet structure.
FIG. 3 is an exploded view on an enlarged scale showing the lower journal and bearing assemblies, and the associated cam and follower means.
FIG. 4 is a perspective view on an enlarged scale over FIG. 1 and 2, and illustrating the upper journal and bearing components.
FIG. 5 is a view on an enlarged scale of the retractable upper journal unit.
FIG. 6 is an exploded view of the components of the upper journal and bearing sections.
FIG. 7 is an exploded view showing the components of the lower journal and bearing sections, together with the lower shelf structure.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to FIGS. 1 and 2, the cabinet sections 10 and 11 extend along intersecting walls, producing a line of junction indicated at 12 of the outer cabinet surfaces 13 and 14. An opening in this junction area has portions indicated at 15 and 16 disposed in planes intersecting at an angle close to 90 degrees. The rotary shelf unit has intersecting panels 17 and 18 adapted to enter the junction opening. These closure panels are secured together at their junction to form a solid structural beam. The fixed cabinet structure includes a top 19 and a bottom 20 which the rotor assembly is positioned and supported.
The upper bearing bracket 21 has a base 22 normally secured to the corner block 23 of the fixed cabinet structure by screws as indicated at 24 and 25. The cone-shaped portion 26 of the bracket 21 is "drawn" from material integral, and originally coplanar, with the base 21. An inwardly-turned sleeve 27 forms the actual bearing. The base 22 has a "V"-shaped extension 28 adapted for interengagement with the junction of the frontal components 29 and 30 of the fixed cabinet structure for accurate location of the axis of the bearing 27 with respect to the junction opening.
The upper journal bracket 31 is provided with the opposite tabs 32 and 33 disposed in perpendicular relationship, with these tabs being received solidly against the closure panels 17 and 18, respectively, and secured by screws as shown at 35. The opposite extremity of the bracket 31 has upper and lower plates 35 and 36 provided with openings for slidably receiving the journal pin 37. This pin has a flange 38 limiting the upward movement of the pin 37 under the action of the compression spring 39. A knurled portion 40 on the pin 37 provides a handle that can be grasped to pull the journal pin 37 downward to disengage the journal 41 from the bearing 27. The installation of the journal 41 into the bearing 27 can be accomplished by using the conical surface 26 as a cam with respect to lateral forces generated by pushing the rotor assembly against the surface 26. This interaction will establish a tendency to retract the pin 37 to permit the entrance of the journal 41 into the bearing 27.
At the lower extremity of the assembly, the bearing bracket generally indicated at 42 has a base 43 provided with a V-shaped extension 44 for interengagement with the junction of the lower frontal components 45 and 46 of the fixed cabinet structure. The bases 22 and 43 are provided with holes 22a and 43a to receive screws securing these units to the cabinet structure. A bearing section 47 is secured to the base 43, and has an axially facing cam surface 48 engaged by the follower 49 secured to the rotor assembly to establish a tendency for the rotor to assume a closed position as shown in FIGS. 1 and 2. The unit 50 also functions as a journal bracket providing the journal extension 51 normally received in the bearing opening 52. A central cylindrical portion 53 on the bracket unit 50 is received within the opening 54 in the dish-shaped plate 55 of the lower rotor tray. This tray is completed by the presence of the flat plate 56, with the vertical extent of the cylindrical portion 53 being sufficient to extend across the distance between the plates 55 and 56 at the center of the assembly. The plate 55 is essentially conical in configuration, with a rim portion 57 bearing directly on the underside of the plate 56, and preferably spot-welded to it to form a rigid structure. The top surface of the cylindrical portion 53 extends only to the underside of the panel 56, with the central threaded hole 58 being opposite the elongated hole 59 in the plate 56. A screw 60 traverses the hole 59, and engages the threaded hole 58 to lock the unit 50 rotatively and within the range of lateral adjustment provided by the elongated hole 59. The opening 54 is sufficiently larger than the cylindrical portion 53 to accomodate this range of lateral adjustability. In the installed position, the shoulder 61 of the bracket unit 50 will bear against the underside of the conical plate 55.
The location of the journal bracket 50 with respect to the closure panels 17 and 18 is provided by the flanges 62-63 on the plate 55 and 64-65 on the plate 56. The flanges 64-65 bear against the outer surfaces of the flanges 62 and 63, with the inner surfaces of the flanges 62 and 63 bearing against the panels 17 and 18 to establish the locating function. The holes 66 and 67 of the flange 63 are in alignment with the holes 68 and 69 of the flange 65, and the holes 70 and 71 of the flange 62 are in alignment with the holes 72 and 73 of the flange 64. Screws as shown at 74 are installed through these aligned openings to secure the relative position of the components with respect to the panels 17 and 18. These screws also establish a solid transfer of stresses between the assembled panels 55-56 and the closure panels 17 and 18. Additional tray components of standard configuration as shown at 75 may be installed along the vertical extent of the panels 17 and 18 as desired.
The installation of the rotor assembly into the fixed structure of the cabinet is accomplished preferably by the retracting the pin 37 after the lower journal 51 has been engaged with the bearing opening 52. When the assembly has been thus completed, the lateral placement of the lower portion of the assembly, as well as the rotary position of the panels 17 and 18 with respect to the cam and follower system are secured by tightening the screw 60 against the lock washer 76, with attention being given to the proper lateral placement of the assembly within the junction opening in the cabinet. In the design of the panels 17 and 18, it must be noted that sufficient clearance should be established within the corner opening of the fixed cabinet structure to accommodate the vertical travel of the cam follower 49 with respect to the cam surface 48. With the usual weight to be expected, this travel will not normally need to be much in excess of an eighth of an inch.