US4012929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Latch construction with improved anti-violation features
Assignee: Emhart Industries Inc
•
Filing: 1976-05-19
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Granted: 1977-03-22
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Expires: 1996-05-19
Abstract
Abstract A bolt is reciprocally extended and retracted in a door by a latch driving mechanism operably connected to exterior and interior operator assemblies projecting from a mounting opening between faces of the door. A pair of inwardly dished reinforcing plates edge abut the door faces spanning the door opening and the exterior operator assembly is secured inwardly against its respective reinforcing plate by primary fastening screws engaged with a lock frame of the exterior operator assembly, through the latch driving mechanism and end secured in the opposite interior reinforcing plate. If a hand actuated interior operator assembly is used, the interior operator is rotatably mounted on the interior cover which is secured to the interior reinforcing plate by secondary fastening screws endwise secured in the primary fastening screws, but if the interior operator assembly includes a lock, the interior operator assembly is secured inwardly against the interior reinforcing plate by the lock frame being similarly engaged by secondary fastening screws. In the latch driving mechanism, a pair of longitudinally extending driving levers are rearwardly operably connected to the exterior and interior operators and forwardly pivotally connected within a rearwardly opening bolt cavity to the bolt for movement thereof. The rearward ends of the driving levers are movably guided along latch frame guide surfaces by pin connection therewith, retention against such guide surfaces being maintained by a spring constantly resiliently urging the driving lever forward ends downwardly about their pivotal connection to the bolt. The spring is C-shaped positioned between the driving levers with an upper leg bearing upwardly against the bolt and a lower leg resting downwardly against the bolt pivot pin and terminating rearwardly thereof with downward engagement in slots of the driving levers.
Inventors
- 👤 Paul G. Solovieff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:47
CPC Classifications
E; E05; E05B; E05B63/00; E05B63/0017; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/096; Y10T292/1014; Y10T292/1015; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/5155; Y10T70/5199; Y10T70/5246; Y10T70/5296; Y10T70/5319; Y10T70/5341; Y10T70/70; Y10T70/7441; Y10T70/7486; Y10T70/7508; Y10T70/7559; Y10T70/7667; Y10T70/7723; Y10T70/7915; Y10T70/7921
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
278 words
In a latch construction of the type for mounting in doors and the like with a bolt extendable from a door edge, a latch driving mechanism mounted within the door operably connected to said bolt movable for moving said bolt between extended and retracted positions, an exterior operator assembly projecting outwardly from an exterior door face at a transverse opening through the door including a lock frame mounting a lock cylinder telescoped by a surrounding annular cover inwardly abutting said exterior door face around said door opening, an interior operator assembly projecting outwardly from an interior door face at said door opening including an interior operator and an annular cover inwardly abutting said interior door face around said door opening, said lock cylinder of said exterior operator assembly and interior operator of said interior operator assembly being operably connected to said latch driving mechanism for selectively moving said latch driving mechanism, and fastening means engaged between said lock frame of said exterior operator assembly and said interior operator assembly retaining assembly of said exterior and interior operator assemblies with said latch driving mechanism and said door; the improvements comprising: said interior operator assembly further including a separate interior reinforcing plate transversely spanning said door opening and edge abutting said interior door face; said fastening means including primary fasteners operably engaged with said interior reinforcing plate securing said lock frame of said exterior operator assembly directly to said interior reinforcing plate, secondary fasteners directly engaged with ends of said primary fasteners and operably engaged with both said interior operator and said cover of said interior operator assembly securing said interior operator and said cover directly to said primary fasteners.
Claim 2
Dependent Claim
278 words
In a latch construction of the type for mounting in doors and the like with a bolt extendable from a door edge, a latch driving mechanism mounted within the door operably connected to said bolt movable for moving said bolt between extended and retracted positions, an exterior operator assembly projecting outwardly from an exterior door face at a transverse opening through the door including a lock frame mounting a lock cylinder telescoped by a surrounding annular cover inwardly abutting said exterior door face around said door opening, an interior operator assembly projecting outwardly from an interior door face at said door opening including an interior operator and an annular cover inwardly abutting said interior door face around said door opening, said lock cylinder of said exterior operator assembly and interior operator of said interior operator assembly being operably connected to said latch driving mechanism for selectively moving said latch driving mechanism, and fastening means engaged between said lock frame of said exterior operator assembly and said interior operator assembly retaining assembly of said exterior and interior operator assemblies with said latch driving mechanism and said door; the improvements comprising: said interior operator assembly further including a separate interior reinforcing plate transversely spanning said door opening and edge abutting said interior door face; said fastening means including primary fasteners operably engaged with said interior reinforcing plate securing said lock frame of said exterior operator assembly directly to said interior reinforcing plate, secondary fasteners directly engaged with ends of said primary fasteners and operably engaged with both said interior operator and said cover of said interior operator assembly securing said interior operator and said cover directly to said primary fasteners.
Claim 3
Dependent Claim
51 words
In a latch construction as defined in claim 1 in which said cover of said interior operator assembly is directly secured to said primary fasteners by said secondary fasteners, said interior operator being rotatably mounted on said cover of said interior operator assembly secured to said primary fasteners by said cover.
Claim 4
Dependent Claim
104 words
In a latch construction as defined in claim 1 in which said primary fasteners of said fastening means are primary screws threadably engaged with said lock frame of said exterior operator assembly and operably engaged with said interior reinforcing plate of said interior operator assembly, said secondary fasteners of said fastening means being secondary screws threadably engaged in ends of said primary screws and engaged with said cover of said interior operator assembly; and in which said interior operator of said interior operator assembly is rotatably connected to said cover of said interior operator assembly operably secured to said primary screws by said cover.
Claim 5
Dependent Claim
54 words
In a latch construction as defined in claim 1 in which said interior operator assembly includes a lock frame mounting a lock cylinder and forming said interior operator, said cover at least radially telescoping said lock frame, said lock frame being secured to said primary fasteners by said secondary fasteners of said fastening means.
Claim 6
Dependent Claim
132 words
In a latch construction as defined in claim 1 in which said interior operator assembly includes a lock frame mounting a lock cylinder and forming said interior operator, said cover at least radially telescoping said lock frame; and in which said primary fasteners of said fastening means are primary screws threadably engaged with said lock frame of said exterior operator assembly and operably engaged with said interior reinforcing plate of said interior operator assembly, said secondary fasteners of said fastening means being secondary screws threadably engaged in ends of said primary screws and operably engaged with said lock frame of said interior operator assembly, said cover of said interior operator assembly being secured telescoping said lock frame of said interior operator assembly by operable connection of said cover to said secondary screws.
Claim 7
Dependent Claim
81 words
In a latch construction as defined in claim 1 in which said exterior operator assembly includes a separate exterior reinforcing plate transversely spanning said door opening between an interior of said door opening and said lock frame and edge abutting said exterior door face, a part of said exterior operator assembly inwardly abutting said exterior reinforcing plate during securement of said lock frame of said exterior operator assembly to said interior reinforcing plate by said primary fasteners of said fastening means.
Claim 8
Dependent Claim
124 words
In a latch construction as defined in claim 1 in which said exterior operator assembly includes a separate exterior reinforcing plate transversely spanning said door opening between an interior of said door opening and said lock frame and edge abutting said exterior door face, a part of said exterior operator assembly inwardly abutting said exterior reinforcing plate during securement of said lock frame of said exterior operator assembly to said interior reinforcing plate by said primary fasteners of said fastening means; and in which said cover of said interior operator assembly is directly secured to said primary fasteners by said secondary fasteners, said interior operator being rotatably mounted on said cover of said interior operator assembly secured to said primary fasteners by said cover.
Claim 9
Dependent Claim
127 words
In a latch construction as defined in claim 1 in which said exterior operator assembly includes a separate exterior reinforcing plate transversely spanning said door opening between an interior of said door opening and said lock frame and edge abutting said exterior door face, a part of said exterior operator assembly inwardly abutting said exterior reinforcing plate during securement of said lock frame of said exterior operator assembly to said interior reinforcing plate by said primary fasteners of said fastening means; and in which said interior operator assembly includes a lock frame mounting a lock cylinder and forming said interior operator, said cover at least radially telescoping said lock frame, said lock frame being secured to said primary fasteners by said secondary fasteners of said fastening means.
Claim 10
Dependent Claim
101 words
In a latch construction as defined in claim 1 in which said exterior operator assembly includes a separate exterior reinforcing plate transversely spanning said door opening between an interior of said door opening and said lock frame and edge abutting said exterior door face, a part of said exterior operator assembly inwardly abutting said exterior reinforcing plate during securement of said lock frame of said exterior operator assembly to said interior reinforcing plate by said primary fasteners of said fastening means; and in which each of said interior and exterior reinforcing plates includes a substantially circular and inwardly dished reinforcing plate.
Claim 11
Dependent Claim
246 words
In a latch construction of the type having a longitudinally slideable reciprocal bolt movable forwardly and rearwardly into extended and retracted positions by a generally longitudinally extending driving lever, a forward end of said driving lever being pivotally connected to said bolt within a rearwardly opening bolt cavity pivotal upwardly and downwardly about a transverse axis, a driving member rotatable about a transverse axis having a generally radially extending and transversely opening driving slot formed therein, a transverse driving pin through a rearward end of said driving lever and through said driving member driving slot slideable along said driving slot, said driving pin in transverse extension also being slideable along a guide surface formed transversely of a latch frame member, said guide surface having a longitudinally extending portion terminating at least forwardly in a generally downwardly projecting end slot, said driving pin sliding along said guide surface longitudinally extending portion during reciprocal movement of said bolt by rotation of said driving member and moving downwardly into said guide slot at said forward end when said bolt is moved fully into its extended position; the improvements comprising: a rearwardly opening C-shaped spring primarily in said bolt cavity resiliently vertically compressed upwardly against said bolt and downwardly against said driving lever forward end spaced rearwardly of said pivotal connection of said driving lever to said bolt to constantly resiliently urge said driving lever pivotally downwardly relative to said bolt and said driving pin downwardly against said guide surface.
Claim 12
Dependent Claim
246 words
In a latch construction of the type having a longitudinally slideable reciprocal bolt movable forwardly and rearwardly into extended and retracted positions by a generally longitudinally extending driving lever, a forward end of said driving lever being pivotally connected to said bolt within a rearwardly opening bolt cavity pivotal upwardly and downwardly about a transverse axis, a driving member rotatable about a transverse axis having a generally radially extending and transversely opening driving slot formed therein, a transverse driving pin through a rearward end of said driving lever and through said driving member driving slot slideable along said driving slot, said driving pin in transverse extension also being slideable along a guide surface formed transversely of a latch frame member, said guide surface having a longitudinally extending portion terminating at least forwardly in a generally downwardly projecting end slot, said driving pin sliding along said guide surface longitudinally extending portion during reciprocal movement of said bolt by rotation of said driving member and moving downwardly into said guide slot at said forward end when said bolt is moved fully into its extended position; the improvements comprising: a rearwardly opening C-shaped spring primarily in said bolt cavity resiliently vertically compressed upwardly against said bolt and downwardly against said driving lever forward end spaced rearwardly of said pivotal connection of said driving lever to said bolt to constantly resiliently urge said driving lever pivotally downwardly relative to said bolt and said driving pin downwardly against said guide surface.
Claim 13
Dependent Claim
48 words
In a latch construction as defined in claim 10 in which said spring has a lower leg terminating rearwardly in an end vertical portion received downwardly in a slot of said driving lever forward end spaced rearwardly of said pivotal connection of said driving lever to said bolt.
Claim 14
Dependent Claim
56 words
In a latch construction as defined in claim 10 in which said spring has a lower leg terminating rearwardly in an end vertical portion, said end vertical portion having a downwardly opening groove formed therein and received over said driving lever forward end spaced rearwardly of said pivotal connection of said driving lever to said bolt.
Claim 15
Dependent Claim
53 words
In a latch construction as defined in claim 10 in which said forward end of said driving lever is pivotally connected to said bolt by a bolt pivot pin extending transversely through said bolt cavity; and in which said spring downwardly engages said bolt pivot pin intermediate a lower leg of said spring.
Claim 16
Dependent Claim
111 words
In a latch construction as defined in claim 10 in which said forward end of said driving lever is pivotally connected to said bolt by a bolt pivot pin extending transversely through said bolt cavity; and in which said spring has a lower leg terminating rearwardly in an end vertical portion, said end vertical portion having a downwardly opening groove formed therein, said end vertical portion engaging over said driving lever receiving said driving lever in said groove with said end vertical portion engaging downwardly in a groove of said driving lever outwardly of said bolt cavity, said spring lower leg downwardly engaging said bolt pivot pin within said bolt cavity.
Claim 17
Dependent Claim
70 words
In a latch construction as defined in claim 10 in which said latch construction includes two transversely spaced driving levers identically connected and identically operable; and in which said spring is mounted transversely between forward ends of said driving levers and has a lower leg terminating rearwardly in an end vertical portion engaging transversely over said driving levers spaced rearwardly of pivotal connection of said driving levers to said bolt.
Claim 18
Dependent Claim
85 words
In a latch construction as defined in claim 10 in which said latch construction includes two transversely spaced driving levers identically connected and identically operable; and in which said spring is mounted transversely between forward ends of said driving levers and has a lower leg terminating rearwardly in an end vertical portion, said end vertical portion extending oppositely transversely over said driving levers spaced rearwardly of pivotal connection of said driving levers to said bolt and being received downwardly in grooves of said driving levers.
Claim 19
Dependent Claim
104 words
In a latch construction as defined in claim 10 in which said latch construction includes two transversely spaced driving levers identically connected and identically operable; in which forward ends of said driving levers are pivotally connected to said bolt by a bolt pivot pin extending transversely through said bolt cavity; and in which said spring is mounted transversely between said forward ends of said driving levers and has a lower leg terminating rearwardly in engagement over said driving levers spaced rearwardly of pivotal connection of said driving levers to said bolt, said spring downwardly engaging said bolt pivot pin intermediate said spring lower leg.
Claim 20
Dependent Claim
147 words
In a latch construction as defined in claim 10 in which said latch construction includes two transversely spaced driving levers identically connected and identically operable; in which forward ends of said driving levers are pivotally connected to said bolt by a bolt pivot pin extending transversely through said bolt cavity; and in which said spring is mounted transversely between said forward ends of said driving levers and has a lower leg terminating rearwardly in an end vertical portion projecting transversely oppositely over said driving levers spaced rearwardly of said driving lever pivotal connection to said bolt by said bolt pivot pin, said end vertical portion having downwardly opening grooves formed therein receiving said driving levers therein and while said end vertical portion is simultaneously engaged downwardly in grooves of said driving levers, said spring lower leg downwardly engaging said bolt pivot pin intermediate said spring lower leg.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-21 | 1980-09-20 | 1981-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-21 | 1984-09-20 | 1985-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-21 | 1988-09-20 | 1989-03-22 | $7700.00 | Window Closed / Lapsed |