Patent EP0374883A2 successfully refreshed from Google Patents.
Patent US4735018A successfully refreshed from Google Patents.
US4735018A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gate operator unit
Assignee: Individual
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Filing: 1987-05-27
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Granted: 1988-04-05
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Expires: 2007-05-27
Abstract
Abstract An automatic gate opening device consisting of two arm members pivotally attached to form a link. One end of the link is pivotally attached to one end of a standoff. The second end of the standoff is fixedly attached to a hinge post supporting the gate. The second end of the link is pivotally attached to the gate. An electrically powered linear actuator is pivotally attached to the post arm and gate arm through levers. The solar panel charges a battery which, through a receiver unit, powers the actuator. Gate operator actuates gate with a portable transmitter.
Inventors
- 👤 William B. Duncan
- 👤 Richard J. Loos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:05
CPC Classifications
E; E05; E05F; E05F15/00; E05F15/60; E05F15/603; E05F15/611; E05F15/63; E05F15/50; E05F15/53; E05F15/616; E05F15/622; E05F15/70; E05F15/77; E05Y; E05Y2201/00; E05Y2201/40; E05Y2201/43; E05Y2201/434; E05Y2201/448; E05Y2400/00; E05Y2400/61; E05Y2400/612; E05Y2400/614; E05Y2400/628; E05Y2600/00; E05Y2600/40; E05Y2600/46; E05Y2900/00; E05Y2900/40
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
231 words
A device for automatically opening and closing a gate comprising: an actuator link including a first arm and a second arm, said arms each having a first and a second end, said first ends being pivotally attached together; a standoff having a first end and a second end, said standoff rigidly attached at said first end to a hinge post of said gate, said second end being removed from said hinge post; arm lever means rigidly attached to either said first arm or said second arm and extending inwardly toward said gate; a linear actuator having a first end and a second end and capable of increasing and decreasing in length; power means for operating said linear actuator, said power means connected to said linear actuator; and means for activating said power means; wherein said first end of said linear actuator is connected to said arm lever means and said second end of said linear actuator is attached to either said first arm or said second arm, said arm lever means increasing mechanical advantage of said linear actuator, said linear actuator thereby capable of pivoting said actuator link, and, having said second end of said first arm attached to said second end of said standoff and said second end of said second arm attached to said gate, the pivoting thereby moving said gate between an open position and a closed position.
Claim 2
Independent Claim
231 words
A device for automatically opening and closing a gate comprising: an actuator link including a first arm and a second arm, said arms each having a first and a second end, said first ends being pivotally attached together; a standoff having a first end and a second end, said standoff rigidly attached at said first end to a hinge post of said gate, said second end being removed from said hinge post; arm lever means rigidly attached to either said first arm or said second arm and extending inwardly toward said gate; a linear actuator having a first end and a second end and capable of increasing and decreasing in length; power means for operating said linear actuator, said power means connected to said linear actuator; and means for activating said power means; wherein said first end of said linear actuator is connected to said arm lever means and said second end of said linear actuator is attached to either said first arm or said second arm, said arm lever means increasing mechanical advantage of said linear actuator, said linear actuator thereby capable of pivoting said actuator link, and, having said second end of said first arm attached to said second end of said standoff and said second end of said second arm attached to said gate, the pivoting thereby moving said gate between an open position and a closed position.
Claim 3
Independent Claim
239 words
A device for automatically opening and closing a gate comprising: an actuator link including a first arm and a second arm, said arms each having a first and a second end, said first ends being pivotally attached; a standoff having a first end and a second end, said standoff rigidly attached at said first end to a hinge post of said gate, said second end being removed from said hinge post; a first arm lever with a first end rigidly attached to said first arm and a second end removed therefrom; a second arm lever with a first end rigidly attached to said second arm and a second end removed thereform; and a linear actuator having a first end and a second end and capable of increasing and decreasing in length; power means for operating said linear actuator, said power means connected to said linear actuator; means for activating said power means; wherein said first end of said linear actuator is connected to said second end of said first arm lever, and said second end of said linear actuator is attached to said second end of said second arm lever, said linear actuator thereby capable of pivoting said actuator link, and, having said second end of said first arm attached to said standoff and said second end of said second arm attached to said gate, the pivoting thereby moving said gate between an open position and a closed position.
Claim 4
Independent Claim
239 words
A device for automatically opening and closing a gate comprising: an actuator link including a first arm and a second arm, said arms each having a first and a second end, said first ends being pivotally attached; a standoff having a first end and a second end, said standoff rigidly attached at said first end to a hinge post of said gate, said second end being removed from said hinge post; a first arm lever with a first end rigidly attached to said first arm and a second end removed therefrom; a second arm lever with a first end rigidly attached to said second arm and a second end removed thereform; and a linear actuator having a first end and a second end and capable of increasing and decreasing in length; power means for operating said linear actuator, said power means connected to said linear actuator; means for activating said power means; wherein said first end of said linear actuator is connected to said second end of said first arm lever, and said second end of said linear actuator is attached to said second end of said second arm lever, said linear actuator thereby capable of pivoting said actuator link, and, having said second end of said first arm attached to said standoff and said second end of said second arm attached to said gate, the pivoting thereby moving said gate between an open position and a closed position.
Claim 5
Dependent Claim
35 words
A device for automatically opening and closing a gate as described in claim 2 wherein said power supply comprises a direct current battery and a solar cell for recharging of said battery during daylight hours.
Claim 6
Dependent Claim
34 words
A device for automatically opening and closing a gate as described in claim 3 wherein said activating means includes a means for receiving a radio wave from a transmitter for remote operation of gate.
Claim 7
Dependent Claim
26 words
A device for automatically opening and closing a gate as described in claim 3 wherein said activating means includes a switch for manual operation of gate.
Claim 8
Dependent Claim
30 words
A device for automatically opening and closing a gate as described in claim 5 including a key means for overriding said switch and preventing the manual operation of said gate.
Claim 9
Dependent Claim
27 words
A device for automatically opening and closing a gate as described in claim 2 wherein said linear actuator lies in a plane formed by said actuator link.
Claim 10
Dependent Claim
44 words
A device for automatically opening and closing a gate as described in claim 2 wherein said actuator link contains an electronic control board therein for engaging and disengaging a drive means, said drive means for extending and contracting a length of said linear actuator.
Claim 11
Dependent Claim
43 words
A device for automatically opening and closing a gate as described in claim 8 wherein said length of said linear actuator changes by approximately twenty (20) inches, said change moving said gate approximately ninety (90°) degrees between said open and said closed positions.
Claim 12
Dependent Claim
48 words
A device for automatically opening and closing a gate as described in claim 2 further comprising a quick release means for disengaging said actuator link from said gate without activating said power means, thereby allowing said gate to be manually moved between said open and said closed positions.
Claim 13
Dependent Claim
66 words
A device for automatically opening and closing a gate as described in claim 10 wherein said quick release means includes a T-handle bolt and a gate connect bracket for securing said second end of said second arm to said gate, said T-handle bolt removably insertable through said gate connect bracket and said second end of said second arm, securing said actuator link to said gate thereby.
Claim 14
Dependent Claim
47 words
A device for automatically opening and closing a gate as described in claim 11 further comprising a lock means removably attached to said T-handle bolt at an end removed from a T-handle end of said T-handle bolt, thereby securing said T-handle bolt to said gate connect bracket.
Claim 15
Dependent Claim
54 words
A device for automatically opening and closing a gate as described in claim 2 wherein said first arm lever and said second arm lever lie substantially within the plane of said actuator link and said first and second arm levers extend substantially perpendicular to said first and second arms of said actuator link, respectively.
Claim 16
Dependent Claim
81 words
A device for automatically opening and closing a gate as described in claim 2 wherein said first and said second arms of said actuator link form an obtuse angle enclosing said linear actuator therein when said gate is in said closed position and with the longitudinal axis of said linear actuator lying substantially parallel to said gate; and wherein said first and said second arms of said actuator link form an acute angle when said gate is in said open position.
Claim 17
Dependent Claim
78 words
A device for automatically opening and closing a gate as described in claim 2 wherein said first and second arms of said actuator link form an obtuse angle enclosing said linear actuator therein when said gate is in said open position and with the longitudinal axis of said linear actuator lying substantially parallel to said gate; and said first and second arms of said actuator link forming an acute angle when said gate is in said closed position.
Claim 18
Dependent Claim
36 words
A device for automatically opening and closing a gate as described in claim 2 further comprising means for adjusting the number of degrees transcribed by said gate when moving between said open and said closed positions.
Claim 19
Dependent Claim
72 words
A device for automatically opening and closing a gate as described in claim 16 wherein said adjusting means includes a collar and fork, said collar being adjustably attached to said linear actuator and to said fork, with said fork being mounted to said second end of said first arm lever, said adjustable attachment thereby determining the number of degrees transcribed by said gate when moving between said open and said closed positions.
Claim 20
Independent Claim
392 words
A device for automatically opening and closing a gate, comprising: an actuator link including a post arm and a gate arm each with a first and a second end, with said first ends of said post arm and said gate arm pivotally attached; a linear actuator having a first and a second end, said linear actuator capable of expanding and contracting in length; a gate arm lever with a first and a second end, rigidly attached at said first end to said gate arm, said gate arm lever extending substantially perpendicular to said gate arm, and with said second end of said gate arm lever pivotally attached to said first end of said linear actuator; a post arm lever with a first and second end, rigidly attached at said first end to said post arm, said post arm lever extending substantially perpendicular to said post arm, and with said second end of said post arm lever pivotally attached to said second end of said linear actuator; a hinge post including at least two hinges for supporting said gate and said gate opening device; a stop post for arresting motion of said gate and maintaining said gate in a closed position; a standoff comprising a longitudinal member having a first and a second end and rigidly attached at said first end to said hinge post at a point between said hinges, said standoff extending outward at an angle of approximately 1471/2 degrees from a plane formed by said gate when in a closed position; a power supply comprising at least one DC battery and a solar cell to recharge said battery, said power supply for actuating said linear actuator; a receiver means for receiving a radio signal from a remote transmitter and non-manually actuating said linear actuator; a switch for manually activating said linear actuator; key means for overriding said manual switch and thereby preventing the manual actuation of said linear actuator without said key means; means to detach said gate arm from said gate thereby moving said gate without operation of said linear actuator; wherein the combination of said standoff, said actuator link, said post arm lever, said gate arm lever, and said linear actuator moves said gate between a closed position when said gate is substantially across a roadway and against said stop post to an open position approximately 90° therefrom.
Claim 21
Independent Claim
392 words
A device for automatically opening and closing a gate, comprising: an actuator link including a post arm and a gate arm each with a first and a second end, with said first ends of said post arm and said gate arm pivotally attached; a linear actuator having a first and a second end, said linear actuator capable of expanding and contracting in length; a gate arm lever with a first and a second end, rigidly attached at said first end to said gate arm, said gate arm lever extending substantially perpendicular to said gate arm, and with said second end of said gate arm lever pivotally attached to said first end of said linear actuator; a post arm lever with a first and second end, rigidly attached at said first end to said post arm, said post arm lever extending substantially perpendicular to said post arm, and with said second end of said post arm lever pivotally attached to said second end of said linear actuator; a hinge post including at least two hinges for supporting said gate and said gate opening device; a stop post for arresting motion of said gate and maintaining said gate in a closed position; a standoff comprising a longitudinal member having a first and a second end and rigidly attached at said first end to said hinge post at a point between said hinges, said standoff extending outward at an angle of approximately 1471/2 degrees from a plane formed by said gate when in a closed position; a power supply comprising at least one DC battery and a solar cell to recharge said battery, said power supply for actuating said linear actuator; a receiver means for receiving a radio signal from a remote transmitter and non-manually actuating said linear actuator; a switch for manually activating said linear actuator; key means for overriding said manual switch and thereby preventing the manual actuation of said linear actuator without said key means; means to detach said gate arm from said gate thereby moving said gate without operation of said linear actuator; wherein the combination of said standoff, said actuator link, said post arm lever, said gate arm lever, and said linear actuator moves said gate between a closed position when said gate is substantially across a roadway and against said stop post to an open position approximately 90° therefrom.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-04-05 | 1991-10-05 | 1992-04-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-05 | 1995-10-05 | 1996-04-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-05 | 1999-10-05 | 2000-04-05 | $7700.00 | Window Closed / Lapsed |