# Patent

## Title
Geared latch apparatus

## Abstract

In at least some embodiments, an apparatus is provided that comprises a frame and a cover removably attached to the frame. The apparatus further comprises a geared latch assembly attached to the cover, the geared latch assembly having a geared latch. If the geared latch is rotated from a first position to a second position, the cover moves linearly from a closed state to an open state.

## Background
PRIORITY INFORMATIONN
This application is a divisional of U.S. National Stage application Ser. No. 13/056,096 filed on Jan. 26, 2011, which claims priority to International application no. PCT/US2008/071854 filed on Jul. 31, 2008. The contents of which are incorporated herein by reference in its entirety.


BACKGROUND
Electronic devices, such as computer systems, often have a removable panel or cover to provide access to components and circuitry disposed within a housing. These removable covers are generally coupled to the housing by a threaded fastener, such as a screw, or other tool-based fasteners. Unfortunately, tool-based fasteners involve a considerable amount of time and effort to remove or attach. Also, screws can become lost.



BRIEF DESCRIPTION OF THE DRAWINGS
Embodiments will hereafter be described with reference to the accompanying drawings, wherein like reference numerals denote like elements, and:
FIG. 1 shows a perspective view of a device having a geared latch mechanism in accordance with embodiments;
FIG. 2 shows an exploded perspective view of the geared latch mechanism of FIG. 1;
FIG. 3 shows a top view of the geared latch mechanism of FIG. 1 in an assembled state;
FIG. 4 shows a side view of the geared latch mechanism of FIG. 1;
FIG. 5 shows a perspective view of the geared latch mechanism of FIG. 1 in an assembled state and aligned with a device's access hood or cover in accordance with embodiments;
FIG. 6 shows a cross-sectional side view of a device with the geared latch mechanism in a closed state in accordance with embodiments;
FIG. 7 shows a cross-sectional side view of a device with the geared latch mechanism in an open state in accordance with embodiments;
FIG. 8 shows a bottom perspective view of a device's access hood or cover with the geared latch mechanism attached in accordance with embodiments; and
FIG. 9 shows a top perspective view of a device's chassis or housing in accordance with embodiments.



NOTATION AND NOMENCLATURE
Certain terms are used throughout the following description and claims to refer to particular system components. As one skilled in the art will appreciate, computer companies may refer to a component by different names. This document does not intend to distinguish between components that differ in name but not function. In the following discussion and in the claims, the terms “including” and “comprising” are used in an open-ended fashion, and thus should be interpreted to mean “including, but not limited to . . . ”
DETAILED DESCRIPTION
The following discussion is directed to various embodiments of the invention. Although one or more of these embodiments may be preferred, the embodiments disclosed should not be interpreted, or otherwise used, as limiting the scope of the disclosure, including the claims. In addition, one skilled in the art will understand that the following description has broad application, and the discussion of any embodiment is meant only to be exemplary of that embodiment, and not intended to intimate that the scope of the disclosure, including the claims, is limited to that embodiment.
FIG. 1 shows a perspective view of a device 10 having a geared latch mechanism 16 in accordance with embodiments. The device 10 preferably corresponds to electronics and components, such as a desktop computer system, a rack mount computer system, a portable computer system, a peripheral device, a network device, a server, and so forth. As illustrated, the device 10 comprises an access hood or cover 12 removably coupled to a housing 14. The device 10 also comprises computing components 11 disposed inside the housing 14. If internal access is desired, then the geared latch mechanism 16 may be engaged to facilitate removal of the cover (i.e., access hood) 12.
In at least some embodiments, the geared latch mechanism 16 preferably comprises a receptacle 18 that attaches to the cover 12. As an example, the receptacle 18 may be fastened to or otherwise removably attached to the cover 12 using connection points 13. In a closed state, the other components of the geared latch mechanism 16 preferably fit partially or fully within the receptacle 18 for protection and/or to minimize interference with other components or devices. As discussed in further detail below, the geared latch mechanism 16 provides leverage to facilitate engagement and disengagement of a slidable interlock between the cover 12 and the housing 14. In this manner, the cover 12 may be attached or removed without tools and with minimal physical force or exertion by the user. It should be noted that the geared latch mechanism 16 may be configured for user-engagement or for automated engagement, such as by a motorized mechanism and a corresponding control system.
FIG. 2 shows an exploded perspective view of the geared latch mechanism 16 of FIG. 1 in accordance with embodiments. Also, FIGS. 3 and 4 respectively show a top view and a side view of the geared latch mechanism 16 of FIG. 1 in an assembled state.
As best shown in FIG. 2, at least some embodiments of the geared latch mechanism 16 comprise various components including, the receptacle 18, a geared latch 70 and a gear rack member 50. The geared latch mechanism 16 also preferably comprises various attachment components including, a static pin 20, a rotational pin 30, a locking member 60 and a rotator 80 associated with the locking member 60.
Specifically, the receptacle 18 previously described provides an open-ended housing or cup 49. In at least some embodiments, the receptacle 18 also comprises a rim 42 that extends around the cup 49, the rim 42 having connection points 48 corresponding to the connection points 13 of the cover 12 for fastening the receptacle 18 to the cover 12. Within the cup 49, various nubs 44 are preferably provided to align and/or to hold in place the gear rack member 50 or other components of the geared latch mechanism 16 as will later be described. Also shown are rotational pin receptacles 46 on opposite sides of the cup 49 and a longitudinal slot 43 extending along a base 45 of the cup 49. During assembly of the geared latch mechanism 16, the rotational pin 30 is inserted through the rotational pin receptacles 46. In some embodiments, the rotational pin 30 comprises a cylindrical body 32 with concave ends 34.
As best shown in FIG. 2, the gear rack member 50 comprises at least one gear rack path 51 having a plurality of gear rack teeth 55. The gear rack member 50 also comprises slots 52 that, if aligned with the nubs 44 of the cup 49, enable the gear rack member 50 to be inserted at a predetermined position within the cup 49. The gear rack member 50 also comprises recesses 56 and 57 that extend partially or fully through the gear rack member 50. Once aligned and inserted into the cup 49, the gear rack member 50 can be fixed in place by insertion of the static pin 20 into or through the recess 56. Although other embodiments may vary, the static pin 20 of FIG. 2 comprises a conical portion 28, a first cylindrical portion 22, a second cylindrical portion 24, and a cap 26.
In at least some embodiments, the gear rack member 50 also comprises a slot 58 to receive the locking member 60 and a nub 59 configured to hold the geared latch 70 in a closed position unless a sufficient upward force is applied at the non-geared end 71. To hold the geared latch 70, the nub 59 of the gear rack member 50 is received by a slot 78 at the non-geared end 71 of the geared latch 70. To further prevent undesired activation of the geared latch 70, the locking member 60 can be turned such that a portion 64 of the locking member 60 extends into the slot 58 of the gear rack member 50. In at least some embodiments, turning the locking member 60 involves turning the rotator 80, which comprises a portion 82 that extends through an opening 73 of the geared latch 70 and into or through a corresponding recess 62 of the locking member 59. To turn the rotator 80, an appropriate tool (not shown) is inserted into a corresponding tool receiver 86. To maintain the rotator 80 approximately flush with the geared latch 70, a rim or shelf 75 in the opening 73 contacts a corresponding rim 84 of the rotator 80. If the non-circular portion 82 of the rotator 80 extends all the way through the locking member 60, the end of the non-circular portion 82 may be received by the recess 57 in the gear rack member 50.
In at least some embodiments, the geared latch 70 preferably comprises slots 79. In such embodiments, the slots 79 can be aligned with the nubs 44 of the cup 49 to facilitate assembly of the geared latch mechanism 16. Proper positioning of the geared latch 70 with respect to the gear rack member 50 ensures that the geared end 76 of the geared latch 70 is aligned with the gear rack paths 51 of the gear rack member 50. Specifically, the gear teeth 77 at the geared end 76 mesh with the gear rack teeth 55 of the gear rack paths 51.
FIG. 5 shows a perspective view of the geared latch mechanism 16 of FIG. 1 in an assembled state and aligned with a device's cover 12 in accordance with embodiments. As shown in FIG. 5, the gear rack paths 51 and gear rack teeth 55 are preferably hidden beneath the cover 12 when the connections points 13 of the cover 12 are aligned with the connection points 48 of the receptacle 18.
As illustrated in the assembled view of FIG. 5, the various components of the geared latch mechanism 16 (e.g., the gear rack member 50, the geared latch 70 and other components) are preferably self-contained within the receptacle 18. It should also be noted that the geared latch mechanism 16 has a relatively low-profile attributed to the low-profile geometry of the various components (e.g., the gear rack member 50, the geared latch 70 and other components can fit within a receptacle that is preferably less than 1⁄2′′ deep). In at least some embodiments, the self-contained and low-profile assembly of the geared latch mechanism 16 may be achieved without any tools or tool-based fasteners. In such embodiments, even the attachment of the geared latch mechanism 16 to the cover 12 via connection points 13 and 48 may be achieved using manually inserted fasteners. Also, the rotator 80 and static pin 20 may be positioned manually. Alternatively, in various embodiments, some tool-based components may facilitate assembly and/or help to prevent unintentional manipulation of the geared latch mechanism 16.
FIGS. 6 and 7 respectively show cross-sectional side views of a device with the geared latch mechanism 16 in a closed state and an open state in accordance with embodiments. As illustrated in FIG. 6, the cover 12 is removably coupled to the housing 14 via a plurality of hooks or latches 138 interlocked with corresponding receptacles or slots 140. The illustrated latches 138 are interlocked with the slots 140 by sliding engagement of the cover 12 along the top length of the housing 14 (e.g., in a leftward direction). A reverse motion (e.g., a rightward movement) of the cover 12 unlocks the latches 138 from the slots 140. In the illustrated embodiment, the geared latch mechanism 16 provides leverage to facilitate the foregoing motions during engagement and disengagement of the cover 12 with the housing 14.
In accordance with embodiments, the static pin 20 described previously is attached to an extension 160 that extends from the housing 14 to a position beneath the geared latch mechanism 16. The static pin 20 extends upwardly through the longitudinal slot 43 in the receptacle 18 and into or through the gear rack member 50 to fix the position of gear rack member 50 while permitting the receptacle 18 and cover 12 (being attached) to move in response to applying an upward force 144 to the geared latch 70 as in FIG. 7. As shown, the geared latch 70 rotates outwardly from the cover 12.
After sufficient movement of the cover 12, the latches 138 disengage from the slots 140 such that the cover 12 can be removed from the housing 14. Removing the cover 12 from the housing 14 also separates the geared latch mechanism 16 from the static pin 20. To join the cover 12 and the housing 14, the geared latch mechanism 16 (attached to the housing) is aligned with the static pin 20. Specifically, the static pin 20 is inserted through the longitudinal slot 43 of the receptacle 18 and into the recess 56 of the gear rack member 50. Once the static pin 20 is inserted in to the recess 56 of the gear rack member 50, a reverse motion to the upward force 144 enables the cover 12 to engage and interlock with the housing 14 (e.g., using latches 138 and corresponding latch slots 140). Accordingly, the geared latch mechanism 16, the static pin 20, the latches 138, and the latch slots 140 facilitate tool-free and leveraged attachment and detachment of the cover 12 with the housing 14.
FIGS. 8 and 9 are perspective views of the cover 12 and the housing 14 disassembled from one another. As illustrated, the latch slots 140 are preferably disposed along opposite sides 148 and 150 of the cover 12, while the hooks or latches 138 are disposed along opposite sides 152 and 154 of the housing 14. FIG. 9 also shows the static pin 20 extending outwardly from the extension 160 of the housing 14. Although the illustrated embodiments show the latch slots 140 being part of the cover 12 and the latches 138 being part of the housing 14, other embodiments are possible. For example, the latch slots 140 may be part of the housing 14 and the latches 138 part of the cover 12.
The above discussion is meant to be illustrative of the principles and various embodiments of the present invention. Numerous variations and modifications will become apparent to those skilled in the art once the above disclosure is fully appreciated. It is intended that the following claims be interpreted to embrace all such variations and modifications.

## Claims

1. A geared latch assembly, comprising:
a geared latch having a geared end and a non-geared end, wherein the geared end comprises a plurality of gear teeth
wherein the non-geared end comprises a slot;
an open receptacle; and
a gear rack that is positioned within the open receptacle and that meshes with the gear teeth, wherein the gear rack includes a recess having a static pin engaged within the recess to interface the geared latch assembly with a housing coupled to the static pin,
wherein the gear rack comprises a nub positioned in the gear rack, the slot to engage with the nub.

2. The geared latch assembly of claim 1 wherein the open receptacle comprises connection points to fasten the open receptacle to a slidable cover of a device.

3. The geared latch assembly of claim 2, wherein the slidable cover is removably attached to the housing.

4. The geared latch assembly of claim 2, wherein the slidable cover has an opening aligned with the open receptacle.

5. The geared latch assembly of claim 4, wherein the open receptacle includes a slot; wherein the static pin extends through the slot.

6. The geared latch assembly of claim 1, wherein the open receptacle is less than 1⁄2 inch deep.

7. The geared latch assembly of claim 1, wherein the gear rack enables a rotational force applied to the non-geared end of the geared latch to be translated into a linear force applied to the open receptacle.

8. The geared latch assembly of claim 1, wherein the open receptacle attaches to an axis of the geared latch.

9. An apparatus comprising:
a cover removably attached to a housing;
a receptacle attached to the cover, the receptacle including a longitudinal slot;
a geared latch assembly seated within the receptacle, wherein the geared latch assembly further comprises:
a geared latch having a geared end and a non-geared end;
a latch member comprising a slot; and a gear rack member including a recess;
a nub positioned in the gear rack, wherein the slot of the latch member to engage with the nub; and
a static pin attached to the housing such that the static pin is fixed in position relative to the housing, wherein the static pin extends through the longitudinal slot and is engaged within the recess.

10. The apparatus of claim 9, wherein the latch member is a monolithic latch member.

11. The apparatus of claim 9, wherein the rotation of the latch member causes the cover to slide from a closed state to an open state.

12. The apparatus of claim 9, wherein rotation of the latch member from a first position to a second position about an axis of rotation causes the longitudinal slot to slide along the static pin.

13. An apparatus, comprising:
a geared latch assembly including:
a geared latch including a geared end comprising a plurality of gear teeth, the geared latch comprising a non-geared end comprising a slot;
an open receptacle; and
a gear rack that is positioned within the open receptacle and that meshes with the gear teeth, wherein the gear rack includes a recess,
wherein the gear rack comprises a nub, wherein the slot of the non-geared end to engage with the nub;


a housing; and
a static pin attached in a fixed position to the housing, wherein the static pin extends through a slot and is engaged within the recess.

14. The apparatus of claim 13, wherein the slot is a longitudinal slot.

15. The apparatus of claim 14, including a cover is removably attached to the housing, and including receptacle attached to the cover, wherein the receptacle includes the longitudinal slot.

16. The geared latch assembly of claim 1, comprising:
a rotator inserted through the geared latch and into a locking member, wherein the rotator enables the locking member to rotate in and out of a slot of the gear rack.

17. The apparatus of claim 9, comprising:
a rotator inserted through the latch member and into a locking member, wherein the rotator enables the locking member to rotate in and out of a slot of the gear rack.

18. The apparatus of claim 13, comprising:
a rotator inserted through the geared latch and into a locking member, wherein the rotator enables the locking member to rotate in and out of a slot of the gear rack.

19. The geared latch assembly of claim 1, the receptacle further comprising a cup, the cup comprising a plurality of nubs;
wherein the gear rack comprises a plurality of slots that align with the plurality of nubs to enable the gear rack to be inserted at a predetermined position.

20. The apparatus of claim 13, the receptacle further comprising a cup, the cup comprising a plurality of nubs;
wherein the gear rack comprises a plurality of slots that align with the plurality of nubs to enable the gear rack to be inserted at a predetermined position.