US3834081A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic sliding door system
Assignee: GYRO Tech Inc
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Filing: 1973-03-30
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Granted: 1974-09-10
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Expires: 1993-03-30
Abstract
Abstract An automatic sliding door system comprising a door frame having a header constituting a housing, a door carrier provided in said housing and projecting downwardly through an elongated opening therein, a door suspended from said door carrier, a prime mover in said housing, a first gear train connecting said prime mover to an operating sprocket, an idler sprocket, belt members extending about said sprockets and connected to said door carrier for effecting traverse of said housing by said door carrier for sliding the door to and from open position. A spring stressed during door opening operation and a second gear train connecting said spring and said operating sprocket for causing the door carrier to restore the door to closed condition. Circuit controlling components are provided for causing two-speed dooropening and door-closing.
Inventors
- 👤 J Catlett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:03
CPC Classifications
E; E06; E06B; E06B3/00; E06B3/32; E06B3/50; E06B3/5054; E06B3/5072; E05; E05F; E05F15/00; E05F15/60; E05F15/603; E05F15/632; E05F15/643; E05F15/646; E05D; E05D15/00; E05D15/48; E05D15/56; E05D15/58; E05D2015/482; E05D2015/586; E05Y; E05Y2201/00; E05Y2201/40; E05Y2201/404; E05Y2201/41; E05Y2201/422; E05Y2201/43; E05Y2201/434; E05Y2201/60; E05Y2201/622; E05Y2201/71; E05Y2400/00; E05Y2400/10; E05Y2400/30; E05Y2400/302; E05Y2800/00; E05Y2800/15; E05Y2800/16; E05Y2800/25; E05Y2800/252; E05Y2800/74; E05Y2800/742; E05Y2800/746; E05Y2900/00; E05Y2900/10; E05Y2900/13; E05Y2900/132
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
158 words
A sliding door entrance system comprising a door frame having side jambs and a header defining a door opening, said header having a compartment, a door for disposition planarwise parallel to said door opening for normal closing relationship thereto, door suspension means provided in said header compartment comprising a door carrier having a body with a lower portion engaged to the upper end of the door for suspension of the latter; a prime mover having a drive shaft, motion transmission means comprising an operator sprocket, an idler sprocket, belt means trained about said operator sprocket and said idler sprocket, said belt means being engaged to said door carrier body a first gear train operatively connecting said drive shaft and said operator sprocket, a spring provided in said header compartment, and a second gear train operatively connecting said spring and head operator sprocket whereby when the latter is driven through said first gear train, said spring will be stressed.
Claim 2
Dependent Claim
158 words
A sliding door entrance system comprising a door frame having side jambs and a header defining a door opening, said header having a compartment, a door for disposition planarwise parallel to said door opening for normal closing relationship thereto, door suspension means provided in said header compartment comprising a door carrier having a body with a lower portion engaged to the upper end of the door for suspension of the latter; a prime mover having a drive shaft, motion transmission means comprising an operator sprocket, an idler sprocket, belt means trained about said operator sprocket and said idler sprocket, said belt means being engaged to said door carrier body a first gear train operatively connecting said drive shaft and said operator sprocket, a spring provided in said header compartment, and a second gear train operatively connecting said spring and head operator sprocket whereby when the latter is driven through said first gear train, said spring will be stressed.
Claim 3
Dependent Claim
33 words
A sliding door entrance system as defined in claim 1 and further characterized by said first gear train being adapted to effect a speed reduction from said drive shaft to said operator sprocket.
Claim 4
Dependent Claim
71 words
A sliding door entrance system as defined in claim 1 and further characterized by said second gear train being adapted so that upon release of energy stored in said spring during stressing, said operator sprocket will be caused to rotate in a direction opposite to that when rotated by said first gear train for effecting travel of said door carrier for causing said door carrier to return to door closed condition.
Claim 5
Dependent Claim
40 words
A sliding door entrance system as defined in claim 3 and further characterized by means altering the angular speed of said operator sprocket at a predetermined juncture prime mover driven operation and spring-driven operation for providing multi-speed door-opening and door-closing.
Claim 6
Dependent Claim
41 words
A sliding door entrance system as defined in claim 4 and further characterized by said means altering the angular speed comprising cam means operatively connected to said second gear train and control elements having cam followers engageable by said cam means.
Claim 7
Dependent Claim
67 words
A sliding door entrance system as defined in claim 1 and further characterized by said door comprising a vertical rail consisting of a first and second components hingedly engaged to each other, latch means carried by said door for maintaining said first and second components in normal coplanar relationship, said latch means being adapted for opening action to permit of swinging of said door about said hinges.
Claim 8
Dependent Claim
48 words
A sliding door entrance system as defined in claim 1 and further characterized by means guiding said carrier for traverse of said header compartment comprising a trackway provided in said compartment and extending axially parallel therewith, and support rollers mounted on said carrier body and engaging said trackway.
Claim 9
Dependent Claim
48 words
A sliding door entrance system as defined in claim 7 and further characterized by an elongated abutment member disposed in said header compartment in elevated relationship to said trackway and a limit roller carried on said carrier for engaging said abutment to restrict vertical displacement of said carrier.
Claim 10
Dependent Claim
29 words
A sliding door entrance system as defined in claim 1 and further characterized by means for adjusting said idler sprocket for maintaining tension upon the belt means trained thereabout.
Claim 11
Dependent Claim
99 words
A sliding door entrance system as defined in claim 1 and further characterized by remote control means connected to said prime mover whereby upon actuation of said control means said operator sprocket will be rotated in one direction by means of said first gear train and said drive shaft and upon deactuation of said control means said operator sprocket will be rotated in the opposite direction by means of said spring and said second gear train causing said prime mover drive shaft to rotate in the opposite direction to cause said prime mover to act as a dynamic brake.
Claim 12
Dependent Claim
86 words
A sliding door entrance system as defined in claim 10 and further characterized by a normally driven shaft provided in said header compartment, said spring being mounted upon said driven shaft, gear means operatively connecting said second gear train and said driven shaft whereby upon deactuation of said control means said driven shaft will be rotated under influence of the release of energy by the spring for causing said operator sprocket to rotate in the direction opposite to that caused upon actuation of said control means.
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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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |