US3926461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically actuated door holder and release
Assignee: Rixson Firemark Inc
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Filing: 1974-08-01
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Granted: 1975-12-16
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Expires: 1994-08-01
Abstract
Abstract An electrically actuated door holder and release for the multipoint holding of a pivoted door throughout a range of door open angles, and for the release of a held door either electrically or in response to manual override. The door holder comprises a channel which pivotally supports through linkages an elongated hold-open bar. An elongated friction strip is carried by the hold-open bar. The hold-open bar is normally held in hold-open position under tension by an armature spring coupled to the holdopen bar. The channel is formed with a slot which guides a slide block which moves linearly along the length of the hold-open bar in response to changes in the angle of door opening. The slide block carries a pivotally supported hold-open cam which engages the friction strip to effect door hold open in the event the armature linkage is further placed under tension by energization of an electromagnet. Upon deenergization of the electromagnet, or alternatively upon the application of a manual override door closing force, the hold-open bar is pivoted away from the slide block and the friction strip engaging cam and the door is released.
Inventors
- 👤 Hooge Richard E D
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:20
CPC Classifications
E; E05; E05F; E05F3/00; E05F3/22; E05F3/221; E05F3/222; E05F15/00; E05F15/70; E05F15/72; E05F2003/228; E05Y; E05Y2201/00; E05Y2201/40; E05Y2201/404; E05Y2201/41; E05Y2201/46; E05Y2201/462; E05Y2201/47; E05Y2201/484; E05Y2201/488; E05Y2800/00; E05Y2800/25; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132; Y; Y10; Y10T; Y10T292/00; Y10T292/28; Y10T292/301
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
131 words
An electrically actuated door holder for the multi-point holding of a pivoted door through a range of opening angles, comprising a holder element, an adjustable linkage of a generally parallelogram configuration including an elongated hold-open bar and a pair of links each individually coupling a different end of the hold-open bar to the holder element, hold-open bar engaging means moved lengthwise relative the hold-open bar in response to variations in door opening angles to thereby engage the hold-open bar at any selected lengthwise point corresponding to the desired angular door opening, and electro-mechanical means including an electromagnet and an armature coupled to the parallelogram linkage and in which the energization of the electromagnet and the resulting armature action moves the hold-open bar into frictional engagement with the hold-open bar engaging means.
Claim 2
Dependent Claim
131 words
An electrically actuated door holder for the multi-point holding of a pivoted door through a range of opening angles, comprising a holder element, an adjustable linkage of a generally parallelogram configuration including an elongated hold-open bar and a pair of links each individually coupling a different end of the hold-open bar to the holder element, hold-open bar engaging means moved lengthwise relative the hold-open bar in response to variations in door opening angles to thereby engage the hold-open bar at any selected lengthwise point corresponding to the desired angular door opening, and electro-mechanical means including an electromagnet and an armature coupled to the parallelogram linkage and in which the energization of the electromagnet and the resulting armature action moves the hold-open bar into frictional engagement with the hold-open bar engaging means.
Claim 3
Dependent Claim
71 words
The combination of claim 1 in which the path of movement for the hold-open bar engaging means is linear, and in which the hold-open bar is supported for pivotal movement by the adjustable linkage towArd and away from the linear path followed by the hold-open bar engaging means so as to maintain a substantially parallel spacing between the linear path followed by the hold-open bar engaging means and the hold-open bar.
Claim 4
Dependent Claim
39 words
The combination of claim 1 in which the hold-open bar engaging means includes a movable slide block, and a cam pivotally supported relative the slide block to engage frictionally the hold-open bar and to effect a yieldable latch therewith.
Claim 5
Dependent Claim
17 words
The combination of claim 3 in which the hold-open bar includes an elongated cam engaging friction surface.
Claim 6
Dependent Claim
46 words
The combination of claim 2 in which the hold-open bar engaging means includes a slide block movable within the elongated opening of the channel, and a cam pivotally supported relative the slide block to engage frictionally the hold-open bar and to effect a yieldable latch therewith.
Claim 7
Dependent Claim
26 words
The combination of claim 5 in which a door arm is coupled to the slide block to move responsively the slide block within the elongated opening.
Claim 8
Dependent Claim
38 words
The combination of claim 6 in which deenergization of the electrical actuated means enables the door arm to move freely the slide block in response to inadequate frictional engagement of the cam with respect to the hold-open bar.
Claim 9
Dependent Claim
223 words
An electrically actuated door holder for the multi-point holding of a door throughout a range of door opening angles, comprising a holder frame, an elongated hold-open bar adjustably supported by the frame, an elongated friction engaging means affixed to or an integral part of a surface of the elongated hold-open bar, hold-open bar engaging means movable lengthwise in a linear path relative the hold-open bar in response to variations in door opening angles, adjustable linkage means coupling the hold-open bar to the holder frame to provide a plurality of generally parallel spaced positions between the hold-open bar and the linear path followed by the hold-open bar engaging means, and electromechanical means including an electromagnet and an armature coupled to the hold-open bar and in which energization of the electromagnet and the resulting armature action moves the hold-open bar into a closer generally parallel spacing with respect to the linear path followed by the hold-open bar engaging means, thereby enabling the hold-open bar engaging means to frictionally engage the hold-open bar and further in which the deenergization of the electromagnet releases the armature enabling the hold-open bar engaging means to increase the spacing between the linear path and the hold-open bar by moving the hold-open bar away from the linear path thus effecting release of any door that is held in an open position.
Claim 10
Dependent Claim
223 words
An electrically actuated door holder for the multi-point holding of a door throughout a range of door opening angles, comprising a holder frame, an elongated hold-open bar adjustably supported by the frame, an elongated friction engaging means affixed to or an integral part of a surface of the elongated hold-open bar, hold-open bar engaging means movable lengthwise in a linear path relative the hold-open bar in response to variations in door opening angles, adjustable linkage means coupling the hold-open bar to the holder frame to provide a plurality of generally parallel spaced positions between the hold-open bar and the linear path followed by the hold-open bar engaging means, and electromechanical means including an electromagnet and an armature coupled to the hold-open bar and in which energization of the electromagnet and the resulting armature action moves the hold-open bar into a closer generally parallel spacing with respect to the linear path followed by the hold-open bar engaging means, thereby enabling the hold-open bar engaging means to frictionally engage the hold-open bar and further in which the deenergization of the electromagnet releases the armature enabling the hold-open bar engaging means to increase the spacing between the linear path and the hold-open bar by moving the hold-open bar away from the linear path thus effecting release of any door that is held in an open position.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |