Abstract:
A counterbalanced adjustable height load bearing support structure (20) with a pretensioning mechanism comprises a pair of pivotable arms (42, 42) each having a free end (44) in engagement with a support assembly (24) and being biased by a torsion spring (40). A lever arm (154) is connected to each torsion spring (40) and exerts a biasing force on the pivotable arm (42) when the lever (154) is rotated, thereby preloading the springs. A cable (122) connects the lever arms and passes over a central bushing (170). The bushing (170) receives a threaded shaft (150) which may be turned to move the bushing and thereby adjust the tension in the cable. Because the cable (122) is capable of sliding engagement with the bushing (170), tension in the cable is substantially uniform throughout its entire length and thus the resultant forces on the lever arms (154) are approximately equal, whereby binding or racking of the support assemblies (20) is minimized as the support surface (32) is raised or lowered.
Abstract:
A low cost task chair (10) comprises a blow molded seat support member (24) having a central planar portion (34) for attachment of a control bracket (36). A recess (38) in the planar portion (34) beneath the control bracket (36) receives a cross brace (40). A pair of arm support frames (22) are secured to the ends of the cross brace (40) and to the control bracket (38). The arms (22) are, therefore, easily assembled to the chair (10) with the cross brace (40) concealed from view. A pedestal (26) is secured to the control bracket (36) and contains a gas cylinder (100) for raising and lowering the seat assembly (12). Another recess (44) is formed in the seat support member (24) for receiving a flush mounted cylinder actuating lever (46). A seat back adjustment mechanism for adjusting the outward position of the back (14) relative to the seat (12) comprises a pair of parallel spaced tubular members (52) telescopingly received by the control bracket (36). A blow molded back support (48) is provided with wedge-shaped channels for receiving a pair of tubular members (52) of a back support frame (48), thereby providing for a back height adjustment feature.
Abstract:
A height adjustable load support structure (20) has a base frame (22), and a generally planar support surface (32). Preferably, two extendable vertical support assemblies (26) support the surface (32) for vertical movement relative to the base frame (22). Each support assembly (26) is engaged by a spring biased pivotable arm (42) to counterbalance the weight placed on the surface (32). A cam system (44, 46) cooperating between the distal ends of the pivotable arms (42) and the support assemblies (26) serves to compensate for the changing spring force on the arms by varying the effective moment arms of the arms (42) thereby equalizing the force on each support assembly through its complete range of vertical travel.
Abstract:
The present invention relates to a rugged and inexpensive filing cabinet (10) constructed from thin, prefinished metal. All the component parts including the case envelope (12), case back (30), kickplate (44), drawers (88) and drawer supports (58) are designed to be cut from coils of metal. Ruggedness and strength are maintained, despite the relative thinness of the metal, because the corners and other potentially critical areas subjected to increased stress are reinforced with structural elements (84, 86) adhesively bonded in place.
Abstract:
A file follower locking assembly (10) selectively locks and releases a follower plate (20) behind the files in a drawer (8) by using two opposed follower guides (22, 24) with eccentric cam grippers (42) to engage upper and lower surfaces (16a, 16b, 18a, and 18b) of open wall channels (16, 18) formed in the drawer sides (12, 14). In a first mode of operation, the cam grippers provide a firm gripping engagement with the upper and lower surfaces. The grippers are released for sliding movement of the assembly along the drawer in a second mode of operation.
Abstract:
A chair is provided having a blow molded back rest (13) and a mechanism (20) which permits the back rest to pivot rearwardly and to be vertically adjusted. The mechanism has a carrier block (22) slidably engaging vertical slots (32) in a support member for vertical adjustment movement. The back rest is operatively attached to the carrier block so that the back rest can move in the vertical direction in unison with the carrier block or pivot rearwardly. The carrier block (22) has a curved integral spring (38) which engages the rear of the back rest to bias the back rest forward and to regulate the rearward pivoting motion as the user reclines. A handle (30) and latch member are pivotably connected to the carrier block to secure the attached back rest and carrier block in the desired vertical position.
Abstract:
A fastening assembly for securing first (80) and second (83) panel components in side-by-side abutting relationship and a method for forming said fastening assembly. Each of said panel components include opposite side surfaces and edge surfaces therebetween, the fastening assembly including means for joining the panel components one to the other in which an elongated open channel (40) extends from an edge surface and into the face of one of the side surfaces of the first panel component (80). An elongated fastening element (30) is disposed within a bore in a surface of the second panel component and is adapted for insertion into the channel, the channel being closed by an insert (35) so that the elongated fastening element is covered by the insert when the panel components are brought into abutting relationship and joined by the elongated fastening element.
Abstract:
A storage cabinet (40) is formed of a plurality of generally planar prepainted sheet metal panels (42, 44, 46, 48, 50, 52) adhesively laminated to one another to define a case of said cabinet. Certain of the panels (70-72) are formed with deep narrow inwardly projecting reinforcing ribs (76) disposed along edge portions of one side of the cabinet near the vertical corners, thereby forming reinforcing structures adjacent these corners. Another side panel (44) formed with edge flanges (86, 88) at right angles to its major plane is mounted with these flanges disposed in the open channels. Improved roller slide supports (140) for the drawers (66) are included, in which channels are formed for lateral confinement of the support rollers to desired predetermined tracks. The drawers (66) also include drawer boxes of thin sheet metal with mating molded plastic subfronts (220). The subfronts include configurations to provide for ease of assembly of the drawers and related components, such as latching and locking elements.
Abstract:
A chair (10) is provided with a bracket assembly mounted to a seat member (12) wherein the seat member is pivotable relative to a base pedestal (18). The chair includes a pair of back support brackets (50), a generally U-shaped frame member wherein an intermediate portion (62) of the U-shaped frame member (60) is disposed beneath the seat member, and the end portions (58) of the U-shaped frame member are pivotally connected to the back support brackets. A back support member (64) is connected to a back member (14) and the intermediate portion.
Abstract:
A chair (10) is provided which comprises a mounting and latch member (18) which is attached to the chair arm (14) to form a male assembly section (22) and a female member (24) which is attached to the bottom (12b) of the seat support structure (12) to provide a female section thereon. The female member has a slot (26) for receiving and holding the mounting member and an attached arm (16) so that the chair arm and the seat support structure are firmly and positively afixed to each other in a manner which also readily permits intentional removal. A resilient latch (50) is resiliently and flexibly joined to the member for engaging the female member in order to prevent the male section from being withdrawn from the slot of the female member until the latch is disengaged.