US3881758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Window opener and latch
Assignee: Illinois Tool Works Inc
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Filing: 1974-01-14
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Granted: 1975-05-06
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Expires: 1994-01-14
Abstract
Abstract A latch for a two-panel window is disclosed. After a base element is affixed to a movable window panel, a latch mounting platform and a swing arm are slid over the base. The swing arm can be pivoted out of latching engagement with a fixed mullion by operator finger pressure on a swing arm leg. The swing arm is biased into a latching position and is limited in its pivoting motion by hooked stops protruding through the mounting platform to the platform underside.
Inventors
- 👤 George E Gross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:00
CPC Classifications
E; E05; E05B; E05B65/00; E05B65/08; E05B65/0835; Y; Y10; Y10S; Y10S292/00; Y10S292/38; Y10S292/46; Y10T; Y10T292/00; Y10T292/08; Y10T292/0894; Y10T292/0895; Y10T292/0902; Y10T292/0911; Y10T292/0926; Y10T292/0928; Y10T292/0934
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
109 words
A latch for a multi-panel window or the like having a movable panel comprising; a stationary base element adapted for attachment to the movable panel, a latch member including a stationary mounting platform element attachably secured to said stationary base, a swing arm secured to said mounting platform for overlapping the mounting platform, hooked stop means mounted on the swing arm for engaging a stationary element of said stationary mounting platform to limit swinging motion of the swing arm relative to the stationary elements, and means interconnecting the swing arm and said stationary element to urge the spring arm into a locking position for engaging a fixed catch member.
Claim 2
Dependent Claim
109 words
A latch for a multi-panel window or the like having a movable panel comprising; a stationary base element adapted for attachment to the movable panel, a latch member including a stationary mounting platform element attachably secured to said stationary base, a swing arm secured to said mounting platform for overlapping the mounting platform, hooked stop means mounted on the swing arm for engaging a stationary element of said stationary mounting platform to limit swinging motion of the swing arm relative to the stationary elements, and means interconnecting the swing arm and said stationary element to urge the spring arm into a locking position for engaging a fixed catch member.
Claim 3
Dependent Claim
23 words
A latch according to claim 1 wherein said hooked stop means engage an undersurface of said stationary mounting platform during swing arm motion.
Claim 4
Dependent Claim
36 words
A latch according to claim 1 including a biasing means forming a portion of said hooked stop means for engaging said stationary element to urge said swing arm into a closed position abuttingly overlying said platform.
Claim 5
Dependent Claim
34 words
A latch according to claim 1 including a biasing means connected to a stationary element for engaging said hooked stop means to urge said swing arm into a closed position abuttingly overlying said platform.
Claim 6
Dependent Claim
17 words
A latch according to claim 4 wherein said biasing means forms a portion at said base element.
Claim 7
Dependent Claim
21 words
A latch according to claim 5 wherein said biasing means includes locking means for locking said mounting platform to said base.
Claim 8
Dependent Claim
22 words
A latch according to claim 1 including living hinge means interconnecting said swing arm and said mounting platform for pivotal relative movement.
Claim 9
Dependent Claim
30 words
A latch according to claim 1 wherein said swing arm is provided with leg means to enable a latch user to move the swing arm through its limited swinging motion.
Claim 10
Dependent Claim
41 words
A latch member according to claim 1 wherein said swing arm is provided with a planar surface conforming to a mounting platform surface, and an elongated finger terminating out of the plane of said surface for engaging said fixed catch member.
Claim 11
Dependent Claim
41 words
A latch according to claim 1 wherein said base element and said mounting platform are provided with mating tongues and grooves for fixedly attaching the base element to the mounting platform when the mounting platform is slid over the base element.
Claim 12
Dependent Claim
105 words
A latch for a window having a movable panel and a fixed frame comprising a stationary base element adapted for attachment to the window panel, and a latch member including a stationary mounting platform element attachably secured to said base, a spring arm hinged to and overlapping the mounting platform, resilient hook means mounted on the swing arm for resiliently engaging the mounting platform to define a limit of swinging motion by the swing arm relative to the stationary elements, and for interconnecting the spring arm and the mounting platform to urge the spring arm into a locking position for engaging a frame catch member.
Claim 13
Dependent Claim
105 words
A latch for a window having a movable panel and a fixed frame comprising a stationary base element adapted for attachment to the window panel, and a latch member including a stationary mounting platform element attachably secured to said base, a spring arm hinged to and overlapping the mounting platform, resilient hook means mounted on the swing arm for resiliently engaging the mounting platform to define a limit of swinging motion by the swing arm relative to the stationary elements, and for interconnecting the spring arm and the mounting platform to urge the spring arm into a locking position for engaging a frame catch member.
Claim 14
Dependent Claim
109 words
A latch for a window having a fixed and a movable part comprising a stationary base element adapted for attachment to one window part, and a latch member including a stationary mounting platform element attachably secured to said base, a spring arm hinged to and overlapping the mounting platform, biasing means interconnecting the spring arm and the base element to urge the spring arm into a locking position for engaging a catch member mounted on a secoNd window part, and hooked stop means mounted on the swing arm for engaging the biasing means to define a limit of swinging motion by the swing arm relative to the stationary elements.
Claim 15
Dependent Claim
109 words
A latch for a window having a fixed and a movable part comprising a stationary base element adapted for attachment to one window part, and a latch member including a stationary mounting platform element attachably secured to said base, a spring arm hinged to and overlapping the mounting platform, biasing means interconnecting the spring arm and the base element to urge the spring arm into a locking position for engaging a catch member mounted on a secoNd window part, and hooked stop means mounted on the swing arm for engaging the biasing means to define a limit of swinging motion by the swing arm relative to the stationary elements.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |