US5072544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motorized pet door apparatus
Assignee: Individual
•
Filing: 1990-04-09
•
Granted: 1991-12-17
•
Expires: 2010-04-09
Abstract
Abstract An electrically powered pet door assembly for use in a home or building. Each assembly includes a frame which is secured to an exterior surface of a building, a panel slidably mounted within parallel tracks of the frame, a rotatable and translational drive assembly for vertically raising the panel, a centrifugal brake for controlling the speed of the vertical opening or closing of the panel and a treadle for activating the rotational and translational drive assembly.
Inventors
- 👤 Louis W. Breck, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:18
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/60; E05F15/603; E05F15/665; E05Y; E05Y2201/00; E05Y2201/20; E05Y2201/21; E05Y2201/23; E05Y2201/232; E05Y2201/242; E05Y2201/252; E05Y2201/26; E05Y2201/262; E05Y2201/266; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
125 words
An apparatus for an electrically powered pet door, having an opened state and closed state, said apparatus comprising frame means for securing to an exterior surface, said frame means includes a plurality of parallel tracks and a crossbar for a seal and a stop, panel means slidably positioned within said parallel tracks of said frame for exposing in said opened state a panel aperture through said exterior surface, said panel means includes a pulley for hoisting said panel means, drive means interconnected with said pulley for said panel means for vertically positioning said panel means in said opened and closed state brake means interconnected to said drive means for regulating the vertical positioning of said panel means, and treadle means for activating said drive means.
Claim 2
Independent Claim
125 words
An apparatus for an electrically powered pet door, having an opened state and closed state, said apparatus comprising frame means for securing to an exterior surface, said frame means includes a plurality of parallel tracks and a crossbar for a seal and a stop, panel means slidably positioned within said parallel tracks of said frame for exposing in said opened state a panel aperture through said exterior surface, said panel means includes a pulley for hoisting said panel means, drive means interconnected with said pulley for said panel means for vertically positioning said panel means in said opened and closed state brake means interconnected to said drive means for regulating the vertical positioning of said panel means, and treadle means for activating said drive means.
Claim 3
Dependent Claim
17 words
An apparatus as set forth in claim 1 wherein said panel means is of a durable material.
Claim 4
Dependent Claim
16 words
An apparatus as set forth in claim 1 wherein said panel means has a flexible lip.
Claim 5
Dependent Claim
25 words
An apparatus as set forth in claim 1 wherein said panel means has a base made of a durable material and includes rounded edges thereon.
Claim 6
Dependent Claim
72 words
An apparatus as set forth in claim 1 wherein said drive means includes a motor and a driveshaft having a first end of a line cord attached to said drive shaft and run over said pulley for said panel means and a second end of said line cord permanently secured to said frame means, and wherein said motor rotatably turns said driveshaft and shortens said line cord when lifting said panel means.
Claim 7
Dependent Claim
45 words
An apparatus as set forth in claim 1 wherein said drive means includes a trigger means, an oscillator means, a signal amplifier means and a gate means for generating a pulse of a predetermined length for said drive means upon activation of said treadle means.
Claim 8
Dependent Claim
16 words
An apparatus as set forth in claim 6 wherein said trigger means includes a Schmitt trigger.
Claim 9
Dependent Claim
16 words
An apparatus as set forth in claim 6 wherein said oscillator means includes a one-shot oscillator.
Claim 10
Dependent Claim
25 words
An apparatus as set forth in claim 8 wherein said oscillator means includes a potentiometer for varying a pulse length generated by said one-shot oscillator.
Claim 11
Independent Claim
17 words
An apparatus as set forth in cliam 6 wherein said signal amplifier means is a triac driver.
Claim 12
Independent Claim
17 words
An apparatus as set forth in cliam 6 wherein said signal amplifier means is a triac driver.
Claim 13
Independent Claim
15 words
An apparatus as set forth in cliam 6 wherein said gate means is a triac.
Claim 14
Independent Claim
15 words
An apparatus as set forth in cliam 6 wherein said gate means is a triac.
Claim 15
Dependent Claim
16 words
An apparatus as set forth in claim 1 wherein said brake means includes a centrifugal brake.
Claim 16
Independent Claim
24 words
An apparatus as set forth in cliam 1 wherein said treadle means includes an electrical switch assembly for activating said drive means upon closure.
Claim 17
Independent Claim
24 words
An apparatus as set forth in cliam 1 wherein said treadle means includes an electrical switch assembly for activating said drive means upon closure.
Claim 18
Independent Claim
204 words
An apparatus for an electrically powered pet door, having an opened state and a closed state, said apparatus comprising a frame including on two or more sides a set of parallel tracks, a cross-bar positioned horizontally across said frame and secured thereto, and said frame being positioned over a panel aperture, a panel member positioned within said frame between said parallel tracks including a fixed lip portion at an upper edge, a base at a bottom-edge sealing said panel aperture when said pet door is in said closed state, and a pulley having a line cord of two ends run over said pulley one end of which is secured to said frame, a rotational and translational drive unit includign a driveshaft having the otehr end of said line cord attached thereto for winding the other end of said line cord therearound, a centrifugal brake driven by said rotational translational drive unit, interconnected thereto by a base body and a rotor of said drive unit, said centrifugal brake functionally engaged with two or more brake shoes and an engaging hole within a brake strator, a treadle electrically connected to said rotational and translational drive unit for raising and lowering said panel member with said frame.
Claim 19
Independent Claim
204 words
An apparatus for an electrically powered pet door, having an opened state and a closed state, said apparatus comprising a frame including on two or more sides a set of parallel tracks, a cross-bar positioned horizontally across said frame and secured thereto, and said frame being positioned over a panel aperture, a panel member positioned within said frame between said parallel tracks including a fixed lip portion at an upper edge, a base at a bottom-edge sealing said panel aperture when said pet door is in said closed state, and a pulley having a line cord of two ends run over said pulley one end of which is secured to said frame, a rotational and translational drive unit includign a driveshaft having the otehr end of said line cord attached thereto for winding the other end of said line cord therearound, a centrifugal brake driven by said rotational translational drive unit, interconnected thereto by a base body and a rotor of said drive unit, said centrifugal brake functionally engaged with two or more brake shoes and an engaging hole within a brake strator, a treadle electrically connected to said rotational and translational drive unit for raising and lowering said panel member with said frame.
Claim 20
Dependent Claim
17 words
An apparatus as set forth in claim 14 wherein said panel member is of a durable material.
Claim 21
Dependent Claim
32 words
An apparatus as set forth in claim 14 wherein said rotational and translational drive unit includes a shaded pole motor, rotatably driving said driveshaft, and said motor being controlled by a gate.
Claim 22
Dependent Claim
90 words
An apparatus as set forth in claim 16 wherein said rotational and translational drive unit includes an electronic trigger coupled to an oscillator and triggerable to supply a signal to said oscillator and drive the same, said oscillator coupled to gate driver to supply a signal to said gate driver for a length of time as determined by a potentiometer, said gate driver coupled to said gate to open said gate for said predetermined length of time, and said gate coupled to said drive means to drive said drive unit.
Claim 23
Independent Claim
44 words
An apparatus as set forth in cliam 14 wherein said treadle includes a treadle plate and a bracket for attaching to an exterior wall surface, a treadle controllable trigger, and an electrical switch coupled to said trigger of said rotational and translational drive unit.
Claim 24
Independent Claim
44 words
An apparatus as set forth in cliam 14 wherein said treadle includes a treadle plate and a bracket for attaching to an exterior wall surface, a treadle controllable trigger, and an electrical switch coupled to said trigger of said rotational and translational drive unit.
References Cited (Backward Citations)
US1743247A
Cited
US1921849A
Cited
US3039038A
Cited
US3821865A
Cited
US4322913A
Cited
US4523408A
Cited
US4760872A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-12-16 | 1995-06-17 | 1995-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-12-16 | 1999-06-17 | 1999-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-12-16 | 2003-06-17 | 2003-12-17 | $7700.00 | Window Closed / Lapsed |