Upper sash detent latch for a double-hung window
AssigneeMilgard Manufacturing Incorporated
InventorsJohn Tremble, Hong Chen, Jacob Rebel
Life of this patent
Estimating the term…
Abstract
A building window includes a generally rectangular frame having an upper rail and opposed side rails. An upper sash and a lower sash are independently movably mounted in the frame. A pair of opposed spring detents are mounted on the side rails adjacent to the upper rail of the frame. A pair of laterally opposed latches are at upper corners of the upper sash at positions to engage the spring detents as the upper sash is moved to its fully raised position. The latches cooperate with the spring detents to hold the upper sash in its fully raised position and are releasable from the spring detents to permit lowering of the upper sash.
Claims14
A building window that includes:
- a generally rectangular frame having an upper rail and opposed side rails,
- an upper sash and a lower sash independently movably mounted in said frame,
- a pair of laterally opposed spring detents mounted on said side rails adjacent to said upper rail, and
- a pair of laterally opposed latches at upper corners of said upper sash at positions to engage said spring detents as said upper sash is moved to a fully raised position,
- said latches being operable in cooperation with said spring detents to hold said upper sash in said fully raised position and being releasable from said spring detents to permit lowering of said upper sash,
- wherein each said spring detent has a resilient arm positioned to be engaged by an associated latch as said upper sash is moved toward said fully raised position, and
- wherein each said resilient arm has a cam portion disposed to be engaged by the associated latch as said upper sash is moved toward said fully raised position resiliently to urge said resilient arm laterally outwardly, and a second portion to cooperate with said latch to hold said upper sash in said fully raised position.
A building window that includes:
- a generally rectangular frame having an upper rail and opposed side rails,
- an upper sash and a lower sash independently mounted in said frame,
- a pair of opposed spring detents mounted on said side rails adjacent to said upper rail, each said spring detent including a base secured to the associated side rail of said frame, a resilient arm and an inverted U-shaped portion connecting said resilient arm to said base such that said resilient arm is positioned laterally inwardly from said base, and
- a pair of laterally opposed latches at upper corners of said upper sash at positions to engage said spring detents as said upper sash is raised to said fully raised position,
- each of said latches including a latch bolt and a spring biasing said latch bolt laterally outwardly to engage an associated spring detent and hold said upper sash in said fully raised position, said latch bolt being movable laterally inwardly against said spring to clear said spring detent and permit lowering of said upper sash.
Dependencies are inferred from the claim text.