Movable or removable closures – Mounted for optional movements – Pivot mounted on sliding member; e.g. – slide-stile
Reexamination Certificate
1999-11-22
2003-08-12
Strimbu, Gregory J. (Department: 3634)
Movable or removable closures
Mounted for optional movements
Pivot mounted on sliding member; e.g., slide-stile
C049S183000, C049S446000
Reexamination Certificate
active
06604324
ABSTRACT:
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
Not applicable.
BACKGROUND OF THE INVENTION
This invention relates generally to the field of window hardware and specifically to a tilt latch or pivot housing.
Double hung windows are provided with counterbalances for maintaining a sash in an elevated position. Springs or weights connected to the sash act as the counterbalance. Many window sashes are adapted for tilting inwardly for cleaning. The sash tilts on a pivot assembly at the bottom of the sash. Spring operated tilt latches at the top of the sash retain the sash in the vertical position and are released for pivoting of the sash. Latches, generally tilt latches, are shown, for example, in U.S. Pat. No. 4,837,975 to Simpson, U.S. Pat. No. 4,901,475 to Simpson, U.S. Pat. No. 4,167,835 to Nobes, U.S. Pat. No. 4,578,903 to Simpson, U.S. Pat. No. 4,475,311 to U.S. Pat. No. Gibson, 4,955,159 to U.S. Pat. No. Rogers, U.S. Pat. No. 4,869,020 to Andres, U.S. Pat. No. 4,961,286 to Bezubic, U.S. Pat. No. 4,790,579 to Maxwell, U.S. Pat. No. 4,553,353 to Simpson, U.S. Pat. No. 4,475,311 to Gibson, U.S. Pat. No. 4,400,026 to Brown, U.S. Pat. No. 4,791,756 to Simpson, U.S. Pat. No. 4,578,903 to Simpson, U.S. Pat. No. 4,320,597 to Sterner, U.S. Pat. No. 4,640,048 to Winner, U.S. Pat. No. 4,622,778 to Simpson, U.S. Pat. No. 4,624,073 to Randall, U.S. Pat. No. 4,669,765 to Ullman, U.S. Pat. No. 5,301,989 to Dallmann, U.S. Pat. No. 5,028,083 to Mischenko, U.S. Pat. No. 5,096,240 to Schultz, U.S. Pat. No. 5,127,685 to Dallaire, U.S. Pat. No. 5,165,737 to Riegelman, U.S. Pat. No. 5,014,466 to Winner, and U.S. Pat. No. 5,139,291 to Schultz, all of which are incorporated herein by reference.
FIGS. 14 and 15
show a prior art tilt latch housing. A housing
250
includes a bottom wall
254
, side walls
256
, a rear wall
258
, and a top wall
260
defining a hollow cavity
262
opening at a front end of the housing. The top wall
260
defines a flange
264
at the top of the side and rear walls
256
,
258
. Retainers
261
project from the side walls
256
and rear wall
258
. Each retainer slopes outwardly from the wall to a lip
269
that defines a catch for engaging edges of a notch in a header rail of a sash. The space between the lip
269
and flange
264
defines a gap or short groove
263
for receiving an edge of the sash therein. A retainer tab
270
projects downwardly from the bottom wall
254
near the front end of the housing
250
.
FIGS. 16 and 17
show another prior art tilt latch housing an upper part
351
and a lower part
353
. The lower part
353
defines a bottom wall
354
, external side walls
356
, and a rear wall
358
. The upper part defines internal side wall
357
and a top wall
360
. The upper and lower parts
351
,
353
are assembled to define a hollow cavity
362
opening at a front end of the housing. The top wall
360
defines a flange
364
at the top of the internal side walls
357
and spaced from the rear wall
358
and external side walls
356
. The top edges of the side walls
356
cooperate with the flange
364
to define longitudinal grooves.
BRIEF SUMMARY OF THE INVENTION
The present invention provides a housing for installation in a window frame having a window sash with a notch defining a pair of opposed edges. The housing includes side walls, a rear wall, and a top wall extending beyond the side walls and rear wall to define a flange. A retainer, such as a protuberance, projects from each of the side walls. Each protuberance has an apex spaced from the flange to define respective gaps for receiving the edges therein. The finger projects from each retainer into the respective gap. The fingers have a thickness permitting flexing or shearing thereof when the edges are received in the gaps.
Preferably, the side walls are provided with plural protuberances each defining a respective gap between the protuberance and the flange and each having a finger projecting from the protuberance into the gap. The protuberances are substantially evenly spaced along the length of each side wall. The protuberances are triangular and a corner of the triangle defines the apex. The protuberances can be flared. A rear protuberance projects from the rear wall and is spaced from the flange to define a gap for receiving the rear edge of the notch. The housing also includes a bottom wall and a retainer projecting from the bottom wall near a front edge of the bottom wall. The housing is molded as a single piece. A pivot bar or movable bolt projects from the housing.
The invention also includes a window sash assembly. A sash has a header rail and a stile joined at a corner and having an opening in the sash. A tilt latch disposed in the opening includes a housing having side walls, a rear wall, and a bottom wall. A top wall extends beyond the side walls and rear wall to define a flange. A protuberance projects from each of the side walls, each protuberance having an apex spaced from the flange to define respective gaps for receiving the edges therein. A bolt is movably disposed in the housing and adapted for engaging a slide channel. A finger projects from each protuberance into the respective gap.
REFERENCES:
patent: 4167835 (1979-09-01), Nobes et al.
patent: 4320597 (1982-03-01), Strener, Jr.
patent: 4400026 (1983-08-01), Brown, Jr.
patent: 4475311 (1984-10-01), Gibson
patent: 4553353 (1985-11-01), Simpson
patent: 4578903 (1986-04-01), Simpson
patent: 4622778 (1986-11-01), Simpson
patent: 4624073 (1986-11-01), Randall
patent: 4640048 (1987-02-01), Winner et al.
patent: 4669765 (1987-06-01), Ullman
patent: 4790579 (1988-12-01), Maxwell et al.
patent: 4791756 (1988-12-01), Simpson
patent: 4837975 (1989-06-01), Simpson
patent: 4869020 (1989-09-01), Andres
patent: 4901475 (1990-02-01), Simpson
patent: 4955159 (1990-09-01), Rogers
patent: 4961286 (1990-10-01), Bezubic
patent: 5014466 (1991-05-01), Winner
patent: 5028083 (1991-07-01), Mischenko
patent: 5096240 (1992-03-01), Schultz
patent: 5121951 (1992-06-01), Harbom et al.
patent: 5127685 (1992-07-01), Dallaire et al.
patent: 5139291 (1992-08-01), Schultz
patent: 5165737 (1992-11-01), Riegelman
patent: 5251401 (1993-10-01), Prete et al.
patent: 5301989 (1994-04-01), Dallmann et al.
patent: 5618067 (1997-04-01), Carlson et al.
patent: 5669639 (1997-09-01), Lawrence
patent: 5671958 (1997-09-01), Szapucki et al.
patent: 5970656 (1999-10-01), Maier
patent: 5996283 (1999-12-01), Maier
patent: 6155615 (2000-12-01), Schultz
patent: 6178696 (2001-01-01), Liang
patent: 6183024 (2001-02-01), Schultz et al.
Pearne & Gordon LLP
Ro-Mai Industries, Inc.
Strimbu Gregory J.
LandOfFree
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