GB2265177A - Sealed lever latch - Google Patents
Sealed lever latch Download PDFInfo
- Publication number
- GB2265177A GB2265177A GB9310073A GB9310073A GB2265177A GB 2265177 A GB2265177 A GB 2265177A GB 9310073 A GB9310073 A GB 9310073A GB 9310073 A GB9310073 A GB 9310073A GB 2265177 A GB2265177 A GB 2265177A
- Authority
- GB
- United Kingdom
- Prior art keywords
- handle assembly
- closed position
- latch
- lever latch
- trigger means
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B7/00—Handles pivoted about an axis parallel to the wing
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B13/00—Devices preventing the key or the handle or both from being used
- E05B13/002—Devices preventing the key or the handle or both from being used locking the handle
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B13/00—Devices preventing the key or the handle or both from being used
- E05B13/10—Devices preventing the key or the handle or both from being used formed by a lock arranged in the handle
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B17/00—Accessories in connection with locks
- E05B17/002—Weather or dirt protection
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B5/00—Handles completely let into the surface of the wing
- E05B5/003—Pop-out handles, e.g. sliding outwardly before rotation
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
- E05C3/00—Fastening devices with bolts moving pivotally or rotatively
- E05C3/02—Fastening devices with bolts moving pivotally or rotatively without latching action
- E05C3/04—Fastening devices with bolts moving pivotally or rotatively without latching action with operating handle or equivalent member rigid with the bolt
- E05C3/047—Fastening devices with bolts moving pivotally or rotatively without latching action with operating handle or equivalent member rigid with the bolt rotating about an axis parallel to the surface on which the fastener is mounted
- E05C3/048—Fastening devices with bolts moving pivotally or rotatively without latching action with operating handle or equivalent member rigid with the bolt rotating about an axis parallel to the surface on which the fastener is mounted parallel to the wing edge
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B17/00—Accessories in connection with locks
- E05B17/0025—Devices for forcing the wing firmly against its seat or to initiate the opening of the wing
- E05B17/0033—Devices for forcing the wing firmly against its seat or to initiate the opening of the wing for opening only
- E05B17/0037—Spring-operated
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B63/00—Locks or fastenings with special structural characteristics
- E05B63/06—Locks or fastenings with special structural characteristics with lengthwise-adjustable bolts ; with adjustable backset, i.e. distance from door edge
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casings For Electric Apparatus (AREA)
Abstract
The sealed lever latch includes a housing for mounting in the door, a handle assembly which is pivotally attached to the housing, and rotatable between an opened and closed position, and a fastening means. The fastening means 17 retains the door, when the door is closed against the frame, by engaging the frame as the handle assembly is rotated to the closed position. The housing, handle assembly and fastening means form an integral solid structure for preventing the passage of matter through the latch itself. The sealed lever latch includes a biasing means which is adapted to retain the handle assembly in the closed position, and a spring 54 urges the handle assembly from the closed position to the opened position upon disengagement of the latch 42 from the keeper 44. A trigger means 20 is also included for releasing the latch. <IMAGE>
Description
SEALED LEVER LATCH
BACKGROUND OF THE INVENTION
Field of the Invention
The present invention relates generally to latching devices and more particularly to lever latches for fastening hinged doors, panels and the like.
Brief Description of the Prior Art
various types of latching devices for fastening doors, panels and the like are known.
Some types incorporate a spring to bias a latch bolt into a latched position about a keeper. Rotary handles are provided so that the latch bolt may be rotated away from the keeper in opposition of the spring, and into an unlatched position.
However, the handle of such a latch which extends beyond the body may cause inadvertent latching and unlatching in response to impact forces.
In U.S. Patent 4,693,503, a lever latch is shown comprising a flanged housing, a handle and a latch which are inserted within an opening in a cabinet door or the like. The handle is provided with an arm and a stcp which compresses against an inner surface of the cabinet frame when the door is closed and latched. The handle and latch are positioned substantially flush with the outer door surface when the handle and the latch are in the latched position. However, the con struction of the latch is such that dirt, water and other matter is able to pass through the latch and into the interior compartment of the cabinet, thus causing damage to the equipment contained therein. A latex boot is oftentimes utilized which covers the back of the latch, however, this only provides partial sealing for the latch.
There is a need for a lever latch which will not only maintain a panel door in a closed position, but will also restrict the passage of matter through the latch itself
SUMMARY OF THE INVENTION
The present invention provides a sealed lever latch for mounting within a door panel of a cabinet or the like for releasably retaining the door against the corresponding frame. The sealed lever latch includes a housing, a handle assembly and a fastening means. The handle assembly, which is pivotally attached to the housing, is rotatable between an opened and closed position. The fastening means retains the door in the closed position against the frame when the handle assembly is rotated to the closed position
Advantageously, the present invention provides a sealed lever latch which is capable of restricting the passage of matter through the latch itself
It is a further advantage of the present invention to provide a biasing means in a sealed lever latch which is capable of retaining the handle assembly in the closed position, and also urging the handle assembly from the closed position to the opened position upon unlatching.
It is still a further advantage of the present invention to provide a trigger means in a sealed lever latch which is integrally disposed within the central vicinity of the handle assembly for providing increased mechanical advantage during the closing thereof.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is a perspective view of a sealed lever latch of the present invention shown mounted in a door of a cabinet, partly broken away, for securing the door to the cabinet frame, the door being shown in a closed position.
Fig. 2 is a sectional view of the sealed lever latch taken along the line 2-2 of Fig. 1.
Fig. 3 is a sectional view of the sealed lever latch taken along the line 3-3 of Fig. 2.
Fig. 4 is a sectional view of the sealed lever latch taken along the line 4-4 of Fig. 2.
Fig. 5 is a fragmentary sectional view of the trigger of the sealed lever latch shown in a rotated position.
Fig. 6 is a sectional view of the sealed lever latch of
Fig. 2 shown in an opened position.
Fig. 7 is a fragmentary sectional view of an alternative embodiment of the sealed lever latch of the present invention.
Fig. 8A is a plan view of the sealed lever latch taken along the line 8A-8A of Fig. 7 shown in a closed and unlocked position.
Fig. 8B is a fragmentary plan view of the sealed lever latch of Fig. 7A shown in a closed and locked position.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring now to the drawings in detail, wherein like reference numerals indicate like elements throughout the several views, there is shown in Fig. 1 a perspective view, partly broken away, of a cabinet 101 having a sealed lever latch 10 of the present invention mounted in a door 100 thereof. The cabinet 101 may be fabricated from any suitable type of material for enclosing various equipment installed therein (not shown).
Accordingly, the door 100 as illustrated in phantom in Fig. 1 is hinged to the cabinet 101 for engaging a cabinet frame 102 in a closed position. A gasket (not shown) may be affixed to the inside of the door 100 proximate the edge thereof for providing additional sealing of the door 100 when closed against the frame 102.
As shown in Fig. 2, the sealed lever latch 10 according to the present invention includes a housing 12 for mounting in an aperture 104 formed in the door 100, a handle assembly 14 pivotally attached to the housing 12, and rotatable between an opened and closed position, and a fastening means 16 for engaging the cabinet frame 102 in the.closed position thereof.
As best seen in Figs. 3 and 6, the housing 12 is a generally rectangular, cup-like member that is preferably of a zink die cast. However, the housing 12 according to the present invention may be produced by any appropriate method from any suitable material. Accordingly, housing 12 comprises a bottom plate 15, and a pair of generally parallel side walls 16, 18 and first and second end walls 20 and 22 ext:ending perpendicularly upward therefrom. As best illustrated in Fig. 6, a well 32 is formed between the respective side walls 16, 18 and end walls 20, 22 for housing the handle assembly 14 when in the closed position of Fig. 2. A flange 24 is also provided extending outward from the free ends of sidewalls 16, 18 and end walls 20, 22 for abutting an outer surface of door 100, when housing 12 is mounted proximate the aperture 104 thereof. A sealing means of the gasket type (not shown) may be affixed to the underside of flange 24 for sealing the flange 24 against the outer surface of the door 100 when the housing 12 is mounted therein. Preferably, the flange 24 of the present invention is sized to prevent the passage of matter around the latch 10, through the aperture 104, and into the interior compartment of cabinet 101. Accordingly, oftentimes, it is necessary to incorporate a larger sized flange, preferably about five millimeters in length, in order to account for imperfections in the preparation of door 100 when the housing 12 is mounted therein.
As shown in Fig. 3, the housing 12 is secured within the aperture 104 by the mounting bracket 62. The bracket 62 is received over the outer surface of housing 12, engaging the inner surface of door 100 shown in Fig. 3. The bracket 62 is held in this position, engaging the door 100, by a threaded bolt 64. The bolt 64 is inserted through an opening formed in bracket 62, engaging the threads 70 provided in bottom plate 15, as shown in
Fig. 5.
As previously described, an important feature of the present invention is to prevent the passage of matter through the latch 10, into the interior compartment of the cabinet 101.
Accordingly, in the preferred embodiment of the present invention illustrated in Figs. 2 and 3, the sidewalls 16, 18 are each provided with a corresponding opening 25 (not shown in Figs.
2 and 3) formed therethrough, adjacent end wall 22, for receiving the handle assembly 14 and fastening means 17 in the manner described below. At assembly, housing 12, handle assembly 14 and fastening means 17 form an integral solid structure for preventing the passage of matter through the sealed lever latch 10.
As shown in Fig. 6, the handle assembly 14 includes a pivot 65 having a first end 66, an upper surface 67 and opposing side walls 68 (only one of which is visible) extending downward from upper surface 67. Oppositely situated apertures 26 are formed adjacent the first end 66 of pivot 65, within the respective side walls 68 thereof, for receiving the fastening means 17 in the manner described below.
As best seen in Figs. 2 and 4, the fastening means 17 includes first and second lever members 80 and 82, each having respective first shafts 84 extending from a first end thereof.
The first shafts 84 are configured to be received within the openings 25, formed within the sidewalls 16, 18 of the housing 12, and apertures 26 of the pivot 65, respectively. Preferably, the first shafts 84 are hexagonal in cross-section over a section thereof in order to be press fit within the correspondingly configured hexagonal openings 25, and apertures 26, respectively.
It should be understood, however, that any appropriately configured first shafts 84, and openings 25 and apertures 26 may be provided for such purpose. As shown in Fig. 4, the first shafts 84 are also formed in such a manner to matingly interconnect along the distal ends thereof, thereby forming a one piece integral shaft member upon assembly. Preferably, the first shaft 84 of first lever member 80 includes an integral rivet member 86 protruding outward therefrom. Accordingly, the rivet member 86 is adapted to be received and peened over within a correspondingly configured receptacle 88, formed through the first shaft 84 of the second lever member 82, for completing the assembly. It is to be understood, however, that any appropriate method may be used for this purpose. A sealing means 90 of the
O-ring type may also be included which s received over the respective first shafts 84 for providing additional sealing for the housing 12 against the first shafts 84, respectively.
Preferably, the sealing means 90 is of an electrically conductive material for preventing the passage of electromagnetic radiation, however, the sealing means 90 according to the present invention may be produced from any suitable material.
As shown in Figs. 2 and 4, the first and second lever members 80 and 82 are also provided with respective second shafts 92 extending from a second end thereof. The second shafts 92 are adapted to interconnect in the manner described above, also forming a one piece integral shaft member upon assembly.
As best illustrated in Figs. 2 and 4, the second shaft 92 of the first lever member 80 is provided with a bracket 94 extending therefrom which includes a threaded opening 96 at its distal end. An adjustable bolt 98 is mounted in the threaded opening 96 and is locked in a fixed position by the action of nut 99. The head 99A of adjustable bolt 99 is positioned to contact the back surface of the frame 102 when handle assembly 14 is moved to its closed and latched position illustrated in Fig. 2.
As shown in Figs. 2 and 5, the handle assembly 14 also includes a trigger 30 for latching and unlatching the handle assembly 14 from the closed position. As best seen in Fig. 5, the trigger 30 is rotatably mounted onte pivot 65 by a connecting member 36, for example of the spring pin type, the ends of which extending through the aligned apertures formed through the opposing side walls 68 of pivot 65, and trigger 30, respectively. Preferably, as illustrated in Figs. 2 and 6, the connecting member 36 or second biasing means rotates an outer surface 72 of trigger 30 upward, into the opening 34 formed within the center of pivot 65. Accordingly, the trigger 30 and pivot 65 are contiguous and flush with the flange 24 of housing 12 in the closed and latched position of Fig. 2.
As shown in Figs. 2, 5, and 6, the trigger 30 also includes a catch 42 formed at the bottom thereof. The catch 42 is adapted to engage in a latched position a keeper 44 formed in the housing 12, when the door 100 is closed against the frame 102 and the handle assembly 14 is rotated to the closed position shown in Fig. 2. As indicated earlier, it is believed that the position of trigger 30 integrally disposed within the vicinity of the center of the handle assembly 14 provides increased mechanical advantage during the closing operation thereof.
As shown in Figs. 2, 4, and 6, a biasing means 54 of the torsion spring type is included mounted onto the first shafts 84 for retaining the catch 42 in engagement with keeper 44 by the ends 50, 60 thereof. Preferably, the ends 50, 60 retain the trigger 30 in the latched position of Fig. 2 by engaging and urging upward trigger 30 along a lower side 51, opposite outer surface 72, and a flange 53, formed adjacent the catch 42, respectively.
As shown in Fig. 5, application of force by an operator downward upon outer surface 72 of trigger 30, in the direction of arrow 55, rotates the catch 42 away from keeper 44, and the ends 50, 60 of biasing means 54 urge the trigger 30, and accordingly handle assembly 14, upward in the direction of arrow 57 from well 32. Whereafter, the fastening means 17 is moved out of contact with frame 102, as the handle assembly 14 is rotated to the opened and unlatched position of Fig. 5 by the force of the biasing means 54.
In Fig. 7 is shown an alternate embodiment of the sealed lever latch of the present invention. A conventional key lock 152 is shown mounted in an aperture 161 formed within the pivot 165 for locking the sealed lever latch 200 in the closed position thereof. As illustrated, the trigger 130 includes a tongue 150 extending therefrom opposite the catch 142. As best seen in Figs. 8A and 8B, the tongue 150 is configured to extend within a locking slot 167 formed in the lower end of lock 152 when in the unlocked position, and abut against the lower end of the lock 152 when the sealed lever latch 200 is closed and locked.
It will be recognized by those skilled in the art that changes may be made to the above-described embodiments of the invention without departing from the broad inventive concepts thereof. It is understood, therefore, that this invention is not limited to the particular embodiments disclosed, but it is intended to cover all modifications which are within the scope and spirit of the invention as defined by the appended claims.
Claims (17)
1. A sealed lever latch for mounting in an aperture formed in a door panel for releasably retaining the door against a corresponding frame, the latch comprising:
a housing,
a handle assembly pivotally attached to the housing, the handle assembly being rotatable between an opened and closed position,
fastening means, the fastening means engaging the frame for retaining the door when the handle assembly is rotated to its closed position, and
biasing means, the biasing means being adapted for retaining the handle assembly in the closed position and urging the handle assembly from the closed position to the opened position upon disengagement.
2. The sealed lever latch of Claim 1, further including means for securing the handle assembly in the closed position, and means for disengaging the handle assembly from the closed position.
3. The sealed lever latch of Claim 2, wherein the housing includes a keeper engaging the handle assembly when the handle assembly is in the closed position.
4. The sealed lever latch of Claim 3, wherein the securing and disengaging means includes a trigger means pivotally mounted on and integrally disposed within the handle assembly, the trigger means engaging the keeper when the handle assembly is moved to the closed position, and the biasing means retaining the trigger means in the closed position and urging the trigger means and handle assembly to the opened position when the trigger means is disengaged from the keeper.
5. The sealed lever latch of Claim 4, wherein the handle assembly includes an opening extending therethrough adapted for receiving the trigger means.
6. The sealed lever latch of Claim 5, further including a second biasing means engaging the handle assembly and the trigger means, whereby the trigger means is contiguous with an outer surface of the handle assembly in the closed and opened positions thereof.
7. The sealed lever latch of Claim 6, wherein the housing, handle assembly and fastening means form an integral solid structure for preventing the passage of matter therethrough.
8. The sealed lever latch of Claim 7, wherein the housing includes flange means extending outward a sufficient amount therefrom for engaging an outside surface of the door for preventing the passage of matter around the latch and through the aperture when the latch is mounted therein.
9. The sealed lever latch of Claim 8, further including locking means integrally disposed within the handle assembly for retaining the trigger means in engagement with the keeper when in a closed and locked position thereof.
10. A sealed lever latch for mounting in an aperture formed in a door panel for releasably retaining the door against a corresponding frame, the latch comprising:
a housing,
a handle assembly pivotally attached ro the housing, the handle assembly being rotatable between an opening and a closed position,
trigger means, the trigger means being pivotally mounted on and integrally disposed within the handle assembly for retaining the handle assembly in the closed position thereof, and biasing means retaining the trigger means in the closed position and urging the trigger means and handle assembly to the opened position when the trigger means is disengaged from the closed position, and fastening means, the fastening means engaging the frame for retaining the door when the handle assembly is rotated to its closed position.
11. The sealed lever latch of Claim 10, wherein the handle assembly includes an opening extending therethrough adapted for receiving the trigger means.
12. The sealed lever latch of Claim 11, wherein the housing includes a keeper engaging the trigger means when the handle assembly is in the closed position.
13. The sealed lever latch of Claim 12, further including biasing means engaging the housing and the handle assembly, the biasing means retaining the trigger means in the closed position and urging the trigger means and handle assembly to the opened position when the trigger means is disengaged from the keeper.
14. The sealed lever latch of Claim 13, further including a second biasing means engaging the handle assembly and the trigger means, whereby the trigger means is continuous with an outer surface of the handle assembly in the closed and opened positions thereof.
15. The sealed lever latch of Claim 14, wherein the housing, handle assembly and fastening means form an integral solid structure for preventing passage of matter therethrough.
16. The sealed lever latch of Claim 15, wherein the housing includes flange means extending outward a sufficient amount therefrom for engaging an outside surface of the door for preventing the passage of matter around the latch and through the aperture when the latch is mounted therein.
17. The sealed lever latch of Claim 16, further including locking means integrally disposed within the handle assembly for retaining the trigger means in engagement with the keeper when in a closed and locked position thereof.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/838,313 US5267762A (en) | 1992-02-20 | 1992-02-20 | Latch with connecting parts forming a seal |
GB9217272A GB2264530B (en) | 1992-02-20 | 1992-08-14 | Sealed lever latch |
Publications (3)
Publication Number | Publication Date |
---|---|
GB9310073D0 GB9310073D0 (en) | 1993-06-30 |
GB2265177A true GB2265177A (en) | 1993-09-22 |
GB2265177B GB2265177B (en) | 1995-01-25 |
Family
ID=26301428
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9310073A Expired - Fee Related GB2265177B (en) | 1992-02-20 | 1992-08-14 | Sealed lever latch |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2265177B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1422367A2 (en) * | 2002-11-25 | 2004-05-26 | Southco, Inc. | An adjustable sliding bolt for a lock |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4159137A (en) * | 1977-12-05 | 1979-06-26 | Tridair Industries | Adjustable multipivot panel latch |
GB1575252A (en) * | 1978-05-26 | 1980-09-17 | Aircraft Materials Ltd | Latch assembly |
US4487440A (en) * | 1981-03-30 | 1984-12-11 | Adams Rite Products, Inc. | Aircraft door bolt actuating mechanism |
WO1988001332A1 (en) * | 1986-08-20 | 1988-02-25 | Keith Alfred Sutton | Door handle assembly |
-
1992
- 1992-08-14 GB GB9310073A patent/GB2265177B/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4159137A (en) * | 1977-12-05 | 1979-06-26 | Tridair Industries | Adjustable multipivot panel latch |
GB1575252A (en) * | 1978-05-26 | 1980-09-17 | Aircraft Materials Ltd | Latch assembly |
US4487440A (en) * | 1981-03-30 | 1984-12-11 | Adams Rite Products, Inc. | Aircraft door bolt actuating mechanism |
WO1988001332A1 (en) * | 1986-08-20 | 1988-02-25 | Keith Alfred Sutton | Door handle assembly |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1422367A2 (en) * | 2002-11-25 | 2004-05-26 | Southco, Inc. | An adjustable sliding bolt for a lock |
EP1422367A3 (en) * | 2002-11-25 | 2007-04-04 | Southco, Inc. | An adjustable sliding bolt for a lock |
Also Published As
Publication number | Publication date |
---|---|
GB9310073D0 (en) | 1993-06-30 |
GB2265177B (en) | 1995-01-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20060814 |