US3806175A - T-section astragal - Google Patents
T-section astragal Download PDFInfo
- Publication number
- US3806175A US3806175A US27485772A US3806175A US 3806175 A US3806175 A US 3806175A US 27485772 A US27485772 A US 27485772A US 3806175 A US3806175 A US 3806175A
- Authority
- US
- United States
- Prior art keywords
- section
- movable member
- over edge
- door
- bent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
- E06B3/32—Arrangements of wings characterised by the manner of movement; Arrangements of movable wings in openings; Features of wings or frames relating solely to the manner of movement of the wing
- E06B3/34—Arrangements of wings characterised by the manner of movement; Arrangements of movable wings in openings; Features of wings or frames relating solely to the manner of movement of the wing with only one kind of movement
- E06B3/36—Arrangements of wings characterised by the manner of movement; Arrangements of movable wings in openings; Features of wings or frames relating solely to the manner of movement of the wing with only one kind of movement with a single vertical axis of rotation at one side of the opening, or swinging through the opening
- E06B3/362—Double winged doors or windows
- E06B3/365—Astragals for double doors
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
- E05C1/00—Fastening devices with bolts moving rectilinearly
- E05C1/02—Fastening devices with bolts moving rectilinearly without latching action
- E05C1/04—Fastening devices with bolts moving rectilinearly without latching action with operating handle or equivalent member rigid with the bolt
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T292/00—Closure fasteners
- Y10T292/08—Bolts
- Y10T292/096—Sliding
- Y10T292/1014—Operating means
- Y10T292/1022—Rigid
- Y10T292/1024—Friction catch
Definitions
- the invention relates to a T-section for the edges of doors, windows, window and door frames and panels with a body having at its one end a bent over edge, positioned squarely on the body and at its other end at least one flange on the same side of the body as this bent over edge.
- Such a section is known in itself. This section is particularly used in combination with an analogous but invertedly disposed section on the cooperating edges of double doors, e.g., folding doors.
- a so-called monkey bolt is mounted, which is a locking member by which one of the doors can be fixed in the groove.
- the monkey bolt is supplied as a separate unit and consists of a rather wide prismatic housing in which a locking member is slidably mounted in the longitudinal direction, by cutting out a corresponding cavity in the door in which the monkey bolt can be received. The latter is then often via the front plate parts, extending in the longitudinal direction, secured to the material of the door by means of screws.
- the housing of the monkey bolt is therefore mounted on the T-section which is then disposed in such a way against the front end of the door that the body of the section is remote from the front end over a distance equal to the depth of the housing of the monkey bolt.
- the section can be secured in the usual way by means of screws, for which purpose the full width of the door is available, since it is no longer necessary to cut into the door before securing being situated parallel to the body of the section and tangential to the outer delimitation of the housing of the lock.
- a preferred embodiment is characterised by the housing having a prismatic shape with a rectangular cross section and the locking member of generally prismatic shape being provided with a nose, protruding through an oblong recess in the body of the section, and with members for fixing the locking member in one of two possible positions.
- FIG. 1 is a cross section through a pair of folding doors one of which is provided with a section according to the invention
- FIG. 2 is a longitudinal section on the line II-II in FIG. 1;
- FIG. 3 is a front view of the section with the monkey bolt according to FIG. 1;
- FIG. 4 is a back view of this section.
- FIG. 1 shows in cross section two cooperating folding doors 1, la, the front sides 2, 2a of which each carrying a section 3, 3a.
- the section 3 is constructed in conformity to the invention; the section 3a is one known in itself.
- Each section 3, 30 consists of a body 4, 4a with a bent over edge 5, 5a with at the other end of the body 4, 4a respectively, a flange 6, 6a with an inwardly directed thickening 7, 70 respectively, and a second flange 8, 8a, respectively, with a thickening 9, 9a,
- the housing 10 for a monkey bolt is formed on the body 4 of the section 3.
- This housing is constituted by two legs 11, 12 square with the body 4, the ends of the legs being bent over, so as to form two flanges 13, 14 facing one theother.
- Within the housing 10 is a prismatic space with a rectangular cross section in which a locking member 15 is disposed.
- This locking member is represented in cross section in FIG. 2. As is shown in FIG. 1, it has a generally prismatic shape and it has on its front face a milled nose l6 which protrudes through an oblong opening 17, formed the monkey bolt, the risk of damage to the door during the former operation is eliminated so that the entire length of the door stays unimpaired.
- the section according to the invention ensures further a reinforcement and stifi'ening of the door.
- an abutment face is formed on the bent over edge, this face in the body 4, while in the back face four grooves 18, 19, 20, 21 are introduced.
- the distance between the grooves 18, 20 on the one hand, and 19, 21 on the other hand is equal, while the distance between the grooves 18 and 19 is equal to the one between the grooves 20 and 21 and determines the distance over which the locking member 15 in the housing 10 can be slid up and down.
- the grooves 18 to 20 cooperate with an oblong plate spring 22 with bent over ends 23, 24 which via the joggled square part 25 is fixed in a rectangular recess 26 in the back wall 14 and 13.
- An inwardly directed abutment 29 is formed on the flange 5 of which the face 30, directed away from the body 4 is aligned with the outer face of the flanges 13, 14.
- this abutment face 30 determines together with the outer sides of the flanges l3, 14, the distance from the body 4 to the front face of the door.
- the section is fixed in the usual way by means of screws in the front face.
- the door 1a is provided with a section 4a shaped such that the two sections cooperate in the way as known in itself.
- the latch and dead bolt of the lock may be provided in the body 4 of the section, so that it is no longer necessary to cut out suitable recesses in the material of the door 1.
- the invention provides a simple, efficient, inexpensive and labour-saving solution for the problem of providing a monkey bolt for mutually cooperating folding doors or'french windows, thereby cancelling each necessi'ty for trimming the doors.
- T-Section for the edge of a movable member comprising a body portion having a bent-over edge at one side positioned perpendicularly to said body and at its other side a flange extending perpendicularly thereto toward and away from the movable member andparallel to the bent-over edge, part of this bent-over edge and said flange enclosing the end of the movable memher, an oblong casing being formed between the body portion and the movable member, said casing adapted to enclose a slidable oblong locking member, one end of which can protrude beyond the length of the T- section, said bent-over edge being provided with an abutment face directed toward the movable member, said section being unitary in construction of the same material and substantially inflexible.
- a section according to claim 4 wherein the movable member is a member from the group comprising a door, a window, a window frame, a door frame and a panel.
- a section according to claim 5 wherein the fixing member is a spring which resiliently-holds the locking member in a selected one of the two possible positions.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Door And Window Frames Mounted To Openings (AREA)
Abstract
T-section for the edges of doors, windows, window and door frames and panels with a body having at its one end a bent over edge, positioned squarely on the body and at its other end at least one flange on the same side of the body as the bent over edge, an oblong casing being formed in the vicinity of at least one of the longitudinal ends of the section on the side of the bent over edge on the body of said section for housing an oblong sliding locking member.
Description
United States Patent .Van Herpen Apr. 23, 1974 [54] T'SECTION ASTRAGAL FOREIGN PATENTS OR APPLlCATlONS [761 Invent Frederik Corneles m 483,411 4/1917 France 292/147 Barendrecht, 66 Noldijk, Netherlands Primary Examiner-Albert G. Craig, Jr. 22 Filed; J l 25, 1972 Attorney, Agent, or FirmStephen E. Feldman [21] Appl. No.: 274,857 ABSTRACT T-section for the edges of doors, windows, window [52] US. Cl. 292ll4lg7s49lliigg and door frames and panels with a body having at its [511 f 369 one end a bent over edge, positioned squarely on the [58] Held 0 1 body and at its other end at least one flange on the 9 same side of the body as the bent over edge, an oblong casing being formed in the vicinity of at least one of [56] References Cited the longitudinal ends of the section on the side of the UNITED STATES PATENTS bent over edge on the body of said section for housing 3,649,060 3/1972 Ruff 292/42 an oblong sliding locking member.
2,489,421 11/1949 Klaar 49/503 2,877,513 3/1959 Rifkin 49/423 6 a 4 Drawing Flgures 355,497 1/1887 Bartlett 292/ l45 93 I 3a 5 6a 1 1 1 1a l K 7 I 30/ 11 a 11 11 1 I ll 14 11 I 4 1 12 F! \2 l ll 1? T-SECTION ASTRAGAL DISCUSSION OF THE PRIOR ART The invention relates to a T-section for the edges of doors, windows, window and door frames and panels with a body having at its one end a bent over edge, positioned squarely on the body and at its other end at least one flange on the same side of the body as this bent over edge.
Such a section is known in itself. This section is particularly used in combination with an analogous but invertedly disposed section on the cooperating edges of double doors, e.g., folding doors.
In may cases it is often desired that on the upper, but mostly also on the lower side of such a door, a so-called monkey bolt is mounted, which is a locking member by which one of the doors can be fixed in the groove. So far, the provision of the monkey bolt, is supplied as a separate unit and consists of a rather wide prismatic housing in which a locking member is slidably mounted in the longitudinal direction, by cutting out a corresponding cavity in the door in which the monkey bolt can be received. The latter is then often via the front plate parts, extending in the longitudinal direction, secured to the material of the door by means of screws. The provision of cavities for accommodating the monkey bolt is a delicate job resulting in even when the job is done with great care, that is to say without damaging the resting side part of the door a considerable weakening of said door. When a force is exerted perpendicular to the plane of the door on a door locked by means of monkey bolts this force will be transmitted via the housing of the monkey bolt to the upper and lower part of the already considerably weakened door owing to the provision of the monkey bolt. In practice it frequently occurs that folding doors having stood the cutting operation, required for the provision of the monkey bol t, without any damage appeared to be seriously damaged at the upper and lower end after having been supplied with said bolt.
SUMMARY OF THE INVENTION It is an object of the invention to obviate these difficulties. According to the invention this is attained by providing in the vicinity of at least one of the longitudinal ends of the section on the side of the bent over edge on the body of the section an oblong casing, extending in the longitudinal direction of the body, in which an oblong locking member, slidable by one end to beyond the end of the section, is accommodated.
According to the invention the housing of the monkey bolt is therefore mounted on the T-section which is then disposed in such a way against the front end of the door that the body of the section is remote from the front end over a distance equal to the depth of the housing of the monkey bolt. The section can be secured in the usual way by means of screws, for which purpose the full width of the door is available, since it is no longer necessary to cut into the door before securing being situated parallel to the body of the section and tangential to the outer delimitation of the housing of the lock.
A preferred embodiment is characterised by the housing having a prismatic shape with a rectangular cross section and the locking member of generally prismatic shape being provided with a nose, protruding through an oblong recess in the body of the section, and with members for fixing the locking member in one of two possible positions.
It is clear that in the body now situated in spaced relationship from the front end of the door, also the latch and dead bolt can be provided, so that also this time consuming operation, moreover often damaging the door, can be omitted.
SURVEY OF THE DRAWINGS- FIG. 1 is a cross section through a pair of folding doors one of which is provided with a section according to the invention;
FIG. 2 is a longitudinal section on the line II-II in FIG. 1;
FIG. 3 is a front view of the section with the monkey bolt according to FIG. 1;
FIG. 4 is a back view of this section.
DESCRIPTION OF PREFERRED EMBODIMENTS FIG. 1 shows in cross section two cooperating folding doors 1, la, the front sides 2, 2a of which each carrying a section 3, 3a. The section 3 is constructed in conformity to the invention; the section 3a is one known in itself. Each section 3, 30 consists of a body 4, 4a with a bent over edge 5, 5a with at the other end of the body 4, 4a respectively, a flange 6, 6a with an inwardly directed thickening 7, 70 respectively, and a second flange 8, 8a, respectively, with a thickening 9, 9a,
. respectively. According to the invention the housing 10 for a monkey bolt is formed on the body 4 of the section 3. This housing is constituted by two legs 11, 12 square with the body 4, the ends of the legs being bent over, so as to form two flanges 13, 14 facing one theother. Within the housing 10 is a prismatic space with a rectangular cross section in which a locking member 15 is disposed.
This locking member is represented in cross section in FIG. 2. As is shown in FIG. 1, it has a generally prismatic shape and it has on its front face a milled nose l6 which protrudes through an oblong opening 17, formed the monkey bolt, the risk of damage to the door during the former operation is eliminated so that the entire length of the door stays unimpaired. The section according to the invention ensures further a reinforcement and stifi'ening of the door.
Preferably an abutment face, turned towards the housing, is formed on the bent over edge, this face in the body 4, while in the back face four grooves 18, 19, 20, 21 are introduced. The distance between the grooves 18, 20 on the one hand, and 19, 21 on the other hand is equal, while the distance between the grooves 18 and 19 is equal to the one between the grooves 20 and 21 and determines the distance over which the locking member 15 in the housing 10 can be slid up and down. The grooves 18 to 20 cooperate with an oblong plate spring 22 with bent over ends 23, 24 which via the joggled square part 25 is fixed in a rectangular recess 26 in the back wall 14 and 13.
The presence of the abutment noses 27, 28 above and below the grooves 18, 21, respectively, limits the eventual path of motion of the locking member 15; from the position depicted in FIG. 2 the locking member can only be moved upwardly over a distance corresponding to the one between the grooves 18 and 19.
' An inwardly directed abutment 29 is formed on the flange 5 of which the face 30, directed away from the body 4 is aligned with the outer face of the flanges 13, 14. When mounting the section against the front face of the door 1, this abutment face 30 determines together with the outer sides of the flanges l3, 14, the distance from the body 4 to the front face of the door. The section is fixed in the usual way by means of screws in the front face.
As is shown in the drawing, the door 1a is provided with a section 4a shaped such that the two sections cooperate in the way as known in itself.
The latch and dead bolt of the lock may be provided in the body 4 of the section, so that it is no longer necessary to cut out suitable recesses in the material of the door 1.
The invention provides a simple, efficient, inexpensive and labour-saving solution for the problem of providing a monkey bolt for mutually cooperating folding doors or'french windows, thereby cancelling each necessi'ty for trimming the doors.
What I claim is:
1. T-Section for the edge of a movable member comprising a body portion having a bent-over edge at one side positioned perpendicularly to said body and at its other side a flange extending perpendicularly thereto toward and away from the movable member andparallel to the bent-over edge, part of this bent-over edge and said flange enclosing the end of the movable memher, an oblong casing being formed between the body portion and the movable member, said casing adapted to enclose a slidable oblong locking member, one end of which can protrude beyond the length of the T- section, said bent-over edge being provided with an abutment face directed toward the movable member, said section being unitary in construction of the same material and substantially inflexible.
2. A section according to claim 1 wherein the casing has a prismatic shape with a rectangular cross-section and the locking member is of generally prismatic shape and provided with a nose protruding through an oblong recess in the body of the section and with a member for fixing the lock in one of two possible positions.
3. A section according to claim 2 wherein said abutment face is flush with the movable member. 7
4. A section according to claim 3 wherein said flange has a thickening flush with a side of the movable member.
5. A section according to claim 4 wherein the movable member is a member from the group comprising a door, a window, a window frame, a door frame and a panel.
6. A section according to claim 5 wherein the fixing member is a spring which resiliently-holds the locking member in a selected one of the two possible positions.
UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,806,175 Dated April 23, 1974 Inventor) Frederik Corneles Van Herpen It is certified thaterror appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:
Column I, line 15, "may" should read mar 1y-.
Signed afid sealed this 7th day of January 1975.
(SEAL) Attest: I
c. MARSHALL DAWN McCOY M. GIBSON JR.
Commissioner of Patents Attesting Officer usoomn-oc 60376-P69 FORM PO-IOSO (10-69) v v I u.s. covlnuyu'ufrpmfme ornc: I!" o-su-Ju.
Claims (6)
1. T-Section for the edge of a movable member comprising a body portion having a bent-over edge at one side positioned perpendicularly to said body and at its other side a flange extending perpendicularly thereto toward and away from the movable member and parallel to the bent-over edge, part of this bent-over edge and said flange enclosing the end of the movable member, an oblong casing being formed between the body portion and the movable member, said casing adapted to enclose a slidable oblong locking member, one end of which can protrude beyond the length of the T-section, said bent-over edge being provided with an abutment face directed toward the movable member, said section being unitary in construction of the same material and substantially inflexible.
2. A section according to claim 1 wherein the casing has a prismatic shape with a rectangular cross-section and the locking member is of generally prismatic shape and provided with a nose protruding through an oblong recess in the body of the section and with a member for fixing the lock in one of two possible positions.
3. A section according to claim 2 wherein said abutment face is flush with the movable member.
4. A section according to claim 3 wherein said flange has a thickening flush with a side of the movable member.
5. A section according to claim 4 wherein the movable member is a member from the group comprising a door, a window, a window frame, a door frame and a panel.
6. A section according to claim 5 wherein the fixing member is a spring which resiliently holds the locking member in a selected one of the two possible positions.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US27485772 US3806175A (en) | 1972-07-25 | 1972-07-25 | T-section astragal |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US27485772 US3806175A (en) | 1972-07-25 | 1972-07-25 | T-section astragal |
Publications (1)
Publication Number | Publication Date |
---|---|
US3806175A true US3806175A (en) | 1974-04-23 |
Family
ID=23049891
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US27485772 Expired - Lifetime US3806175A (en) | 1972-07-25 | 1972-07-25 | T-section astragal |
Country Status (1)
Country | Link |
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US (1) | US3806175A (en) |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4058332A (en) * | 1976-02-02 | 1977-11-15 | Acorn Building Components, Inc. | Astragal and flush bolt assembly |
US4098101A (en) * | 1976-10-04 | 1978-07-04 | Caterpillar Tractor Co. | Latch mechanism for doors and the like |
US4231597A (en) * | 1978-05-05 | 1980-11-04 | The Eastern Company | Flush-type door lock |
US4390198A (en) * | 1980-05-27 | 1983-06-28 | Motorola, Inc. | Molded multifunction latch mechanism |
US5328217A (en) * | 1992-04-30 | 1994-07-12 | Pemko Manufacturing Company | Locking astragal |
US6453616B1 (en) | 2001-03-28 | 2002-09-24 | Genesis Architectural Products, Inc. | Astragal |
US6457751B1 (en) * | 2001-01-18 | 2002-10-01 | John F. Hartman | Locking assembly for an astragal |
US6666486B1 (en) * | 2000-09-21 | 2003-12-23 | W & F Manufacturing | Slide bolt unit |
US20040135376A1 (en) * | 2003-01-10 | 2004-07-15 | Mark Jeffries | Flush bolt |
US20040256858A1 (en) * | 2002-08-27 | 2004-12-23 | Governale Bernard C. | Astragal boot for a double door set |
US20060150517A1 (en) * | 2005-01-07 | 2006-07-13 | Meeks James W | Slide bolt assembly for an astragal |
US7878559B2 (en) | 2005-01-07 | 2011-02-01 | Quanex Corporation | Lock block assembly for an astragal |
US10604990B2 (en) | 2016-09-23 | 2020-03-31 | Endura Products, Llc | Passive door bolt assembly |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US355497A (en) * | 1887-01-04 | Oases | ||
FR483411A (en) * | 1916-11-09 | 1917-07-04 | Societe Vachette Freres Et Leurs Fils | Improvements to rod locks and others |
US2489421A (en) * | 1945-02-21 | 1949-11-29 | W P Fuller & Co | Door catch |
US2877513A (en) * | 1955-09-30 | 1959-03-17 | Rifkin Michael | Window construction |
US3649060A (en) * | 1969-12-19 | 1972-03-14 | Steelcraft Mfg Co | Combined astragal and flush bolt structure |
-
1972
- 1972-07-25 US US27485772 patent/US3806175A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US355497A (en) * | 1887-01-04 | Oases | ||
FR483411A (en) * | 1916-11-09 | 1917-07-04 | Societe Vachette Freres Et Leurs Fils | Improvements to rod locks and others |
US2489421A (en) * | 1945-02-21 | 1949-11-29 | W P Fuller & Co | Door catch |
US2877513A (en) * | 1955-09-30 | 1959-03-17 | Rifkin Michael | Window construction |
US3649060A (en) * | 1969-12-19 | 1972-03-14 | Steelcraft Mfg Co | Combined astragal and flush bolt structure |
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4058332A (en) * | 1976-02-02 | 1977-11-15 | Acorn Building Components, Inc. | Astragal and flush bolt assembly |
US4098101A (en) * | 1976-10-04 | 1978-07-04 | Caterpillar Tractor Co. | Latch mechanism for doors and the like |
US4231597A (en) * | 1978-05-05 | 1980-11-04 | The Eastern Company | Flush-type door lock |
US4390198A (en) * | 1980-05-27 | 1983-06-28 | Motorola, Inc. | Molded multifunction latch mechanism |
US5328217A (en) * | 1992-04-30 | 1994-07-12 | Pemko Manufacturing Company | Locking astragal |
US5350207A (en) * | 1992-04-30 | 1994-09-27 | Pemko Manufacturing Company | Locking astragal |
US6666486B1 (en) * | 2000-09-21 | 2003-12-23 | W & F Manufacturing | Slide bolt unit |
US6457751B1 (en) * | 2001-01-18 | 2002-10-01 | John F. Hartman | Locking assembly for an astragal |
US6453616B1 (en) | 2001-03-28 | 2002-09-24 | Genesis Architectural Products, Inc. | Astragal |
US20040256858A1 (en) * | 2002-08-27 | 2004-12-23 | Governale Bernard C. | Astragal boot for a double door set |
US7140154B2 (en) | 2002-08-27 | 2006-11-28 | W & F Manufacturing | Astragal boot for a double door set |
US20040135376A1 (en) * | 2003-01-10 | 2004-07-15 | Mark Jeffries | Flush bolt |
US20060150517A1 (en) * | 2005-01-07 | 2006-07-13 | Meeks James W | Slide bolt assembly for an astragal |
US7543860B2 (en) | 2005-01-07 | 2009-06-09 | Quanex Corporation | Slide bolt assembly for an astragal |
US7878559B2 (en) | 2005-01-07 | 2011-02-01 | Quanex Corporation | Lock block assembly for an astragal |
US10604990B2 (en) | 2016-09-23 | 2020-03-31 | Endura Products, Llc | Passive door bolt assembly |
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