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US 5,536,052 AGranted
Sash lock with improved tumbler
AssigneeRo-Mai Industries, Inc.
InventorRobert G. Maier
Life of this patent
Estimating the term…
Abstract
A tumbler is pivotably mounted in a sash lock housing. In an extended position, an end of the tumbler limits movement of a window sash. A post in the housing extends through an eccentric bore in the tumbler. The bore defines a shelf or protrusion that urges the tumbler into engagement with the housing, thereby preventing over-rotation of the tumbler in the extended position. A spring urges the tumbler toward the extended position and cooperates with the protrusion to urge the tumbler into engagement with the housing.
Claims15
A sash lock, comprising:
- a housing defining a cavity;
- a tumbler disposed in the cavity and pivotably mounted so as to permit pivoting movement of the tumbler between a retracted position in the housing and an extended position projecting from the housing;
- means for biasing the tumbler toward the extended position;
- a pivot post on which the tumbler is pivotably mounted;
- and
- an eccentric pivot bore into which the pivot post extends, said pivot bore and pivot post cooperating with the biasing means to urge the tumbler into engagement with the housing in the extended position thereby limiting rotation of the tumbler, wherein said pivot bore has a protrusion resisting longitudinal movement of the tumbler in the extended position.
3 more elements
A sash lock, comprising:
- a housing defining a cavity and having a post disposed therein;
- a tumbler having a sash engaging nose, said tumbler having an eccentric pivot bore therethrough and being disposed in the cavity and pivotably mounted on the post so as to permit pivoting movement of the tumbler between a retracted position in the housing and an extended position wherein said nose projects from the housing;
- a spring for urging the tumbler toward the extended position;
- and
- a protrusion defined by the bore, said protrusion being engageable with the post and cooperating with the spring to urge the tumbler longitudinally into engagement with the housing in the extended position.
2 more elements
A window assembly in combination with a sash lock having
- an upper sash and a lower sash, each having a header rail, a base rail, and a pair of stiles;
- and
- the sash lock disposed in one of the stiles of the upper sash, said sash lock comprising:
- a housing defining a cavity and having a post disposed therein;
- a tumbler having a nose positioned to engage an upper surface of the header rail of the lower sash, said tumbler having an eccentric pivot bore therethrough and being disposed in the cavity and pivotably mounted on the post so as to permit pivoting movement of the tumbler between a retracted position in the housing and an extended position wherein said nose projects from the housing;
- a spring for urging the tumbler toward the extended position;
- and
- a protrusion defined by the bore, said protrusion being engageable with the post and cooperating with the spring to urge the tumbler longitudinally into engagement with the housing in the extended position.
5 more elements
Dependencies are inferred from the claim text.