US4103809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pilot's kneepad
Assignee: Unisearch Ltd
•
Filing: 1977-06-07
•
Granted: 1978-08-01
•
Expires: 1997-06-07
Abstract
Abstract A pilot's kneepad for use as an aid to navigation by pilots and navigators of aircraft and other vessels consisting of a plate which has means for attaching it to the upper surface of the thigh of a seated pilot, the plate having on its upper surface information for use in navigational calculations and having hingedly attached to it along one edge a second plate the underside of which also carries information for use in navigational calculations and which has on its upper side means for attachment of a writing pad. Preferably, along one edge of the plate is provided a slide rule that can be used for making inflight calculations.
Inventors
- 👤 Richard Butler Frost
- 👤 Joseph Laszlo Juhasz
- 👤 Barry Walter Wing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:27
CPC Classifications
B; B64; B64D; B64D43/00; A; A45; A45F; A45F5/00; G; G06; G06G; G06G1/00; G06G1/0005; G06G1/0052; B64D45/00; B64D2045/0075
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
219 words
A pilot's kneepad comprising, first plate means carrying permanent indicia on an upper surface thereof for use in navigational calculations, means connected with said first plate means for attachment of the kneepad to the upper surface of a seated pilot's thigh to lie flat thereon, a second plate means overlying said first plate means, said second plate means being hingedly connected to said first plate means along one edge thereof for movement of said second plate between a closed position in which said upper surface of said first plate means and a lower surface of said second plate means are in face-to-face relation and an open position, means carried on an upper surface of said second plate means for attachment of a writing pad thereto, and permanent indicia carried on the lower surface of said second plate means for use in navigational calculations whereby said permanent indicia on said upper surface of said first plate means and on said lower surface of said second plate means are readily available for view and use by the pilot when said second plate means is in the open position, and whereby a writing pad attached to said upper surface of said second plate means is in position for use by the pilot when said second plate means is in the closed position.
Claim 2
Dependent Claim
219 words
A pilot's kneepad comprising, first plate means carrying permanent indicia on an upper surface thereof for use in navigational calculations, means connected with said first plate means for attachment of the kneepad to the upper surface of a seated pilot's thigh to lie flat thereon, a second plate means overlying said first plate means, said second plate means being hingedly connected to said first plate means along one edge thereof for movement of said second plate between a closed position in which said upper surface of said first plate means and a lower surface of said second plate means are in face-to-face relation and an open position, means carried on an upper surface of said second plate means for attachment of a writing pad thereto, and permanent indicia carried on the lower surface of said second plate means for use in navigational calculations whereby said permanent indicia on said upper surface of said first plate means and on said lower surface of said second plate means are readily available for view and use by the pilot when said second plate means is in the open position, and whereby a writing pad attached to said upper surface of said second plate means is in position for use by the pilot when said second plate means is in the closed position.
Claim 3
Dependent Claim
32 words
A pilot's kneepad as claimed in claim 1 wherein there is formed integrally with said first plate means and extending along one edge thereof a slide rule body having a slide therein.
Claim 4
Dependent Claim
23 words
A pilot's kneepad as claimed in claim 2 wherein said slide rule body extends along a forward edge of said first plate means.
Claim 5
Dependent Claim
47 words
A pilot's kneepad as claimed in claim 1 wherein said means for attachment of said writing pad to the upper surface of said second plate means comprises a pocket on said upper surface of said second plate means for receiving therein a part of said writing pad.
References Cited (Backward Citations)
US1930478A
Cited
US2073352A
Cited
US2420673A
Cited
US2701173A
Cited
US3037693A
Cited
US3193195A
Cited
US3215453A
Cited
US3543977A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-07-31 | 1982-01-30 | 1982-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-31 | 1986-01-30 | 1986-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-31 | 1990-01-30 | 1990-08-01 | $7700.00 | Window Closed / Lapsed |