Patent US4742478A successfully refreshed from Google Patents.
US4742478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Housing for a portable computer
Assignee: EMC Corp
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Filing: 1984-09-19
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Granted: 1988-05-03
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Expires: 2004-09-19
Abstract
Abstract A portable computer is sized to fit into a businessman's attache case and may be seated on a surface for use in either a normal position or a tilted forward position. The portable computer includes a housing having a base, a front top cover, a rear top cover and a foot door. The front top cover is pivotally attached to the front of the rear top cover and the rear top cover is fixedly attached to the base. Computer electronics (i.e. printed circuit boards), and two floppy disk drives are mounted inside the housing on the base at the rear and a full size keyboard is mounted inside the housing on the base at the front. A battery pack is disposed in the rear top cover of the housing. A full size liquid crystal display monitor is mounted on the front top cover. The foot door is movably mounted on the back of the base. When the front top cover is pivoted open the display screen is viewable and the keyboard is accessible. When the foot door is in a closed position the keys on the keyboard are at the optimum angle for typing with the portable computer resting on the lap of a user and when the foot door is in an open position the keys on the keyboard are at the optimum angle for typing with the portable computer resting on a desk or table and tilted forward.
Inventors
- 👤 Arthur R. Nigro, Jr.
- 👤 Marcel Boudreau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:00
CPC Classifications
G; G06; G06F; G06F1/00; G06F1/16; G06F1/1613; G06F1/1615; G06F1/1616; G06F1/1633; G06F1/1656; G06F1/166; H; H05; H05K; H05K5/00
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
189 words
A portable computer comprising: a. a housing for resting on a surface, said housing including a base, a front top cover, a rear top cover and a foot door, said base including a bottom wall having a generally flat front section and a generally flat rear section, said generally flat front section being angled relative to said generally flat rear section, said rear top cover being secured to said base, said front top cover being pivotally mounted on said rear top cover, said foot door being mounted on said generally flat rear section and movable from a closed position to an open position for selectively tilting said housing in a forwardly direction, said computer being usable in both said tilted and said untilted positions and resting on said generally flat rear section of said bottom wall when in an untilted position and on said generally flat front section of said bottom wall and said front door when in a tilted position, b. computer electonic circuitry in said housing, c. disk drive means in said housing, d. a keyboard in said housing, and e. a display monitor in said housing.
Claim 2
Dependent Claim
189 words
A portable computer comprising: a. a housing for resting on a surface, said housing including a base, a front top cover, a rear top cover and a foot door, said base including a bottom wall having a generally flat front section and a generally flat rear section, said generally flat front section being angled relative to said generally flat rear section, said rear top cover being secured to said base, said front top cover being pivotally mounted on said rear top cover, said foot door being mounted on said generally flat rear section and movable from a closed position to an open position for selectively tilting said housing in a forwardly direction, said computer being usable in both said tilted and said untilted positions and resting on said generally flat rear section of said bottom wall when in an untilted position and on said generally flat front section of said bottom wall and said front door when in a tilted position, b. computer electonic circuitry in said housing, c. disk drive means in said housing, d. a keyboard in said housing, and e. a display monitor in said housing.
Claim 3
Dependent Claim
68 words
The portable computer of claim 1 and wherein said keyboard is in an optimum position relative to the hands of a user on the one hand when said portable computer is on a desk and said foot door is in an open position and on the other hand when said portable computer is on the lap of a user and said foot door is in a closed position.
Claim 4
Dependent Claim
25 words
The portable computer of claim 2 and wherein said foot door is a unitary structure and includes a curved back wall and a bottom wall.
Claim 5
Dependent Claim
38 words
The portable computer of claim 3 and wherein said foot door includes means for providing positive locking of said foot door in a closed position and means providing positive locking of said foot door in an open position.
Claim 6
Dependent Claim
28 words
The portable computer of claim 4 and wherein said generally flat front section and said generally flat rear section are angled at an angle of about 10 degrees.
Claim 7
Dependent Claim
43 words
The portable computer of claim 5 wherein said means for providing positive locking of said foot door in a closed position comprises flex type locking tabs and said means for providing positive locking of said foot door in an open position comprises detents.
Claim 8
Dependent Claim
26 words
The portable computer of claim 6 and wherein said foot door serves as a cover for the back of the housing when in the closed position.
Claim 9
Dependent Claim
31 words
The housing of claim 5 and wherein said housing has a generally rectangular wedge shaped configuration when said foot door and said front top cover are both in their closed position.
Claim 10
Dependent Claim
19 words
The portable computer of claim 1 and wherein said display monitor is fixedly mounted on said front top cover.
Claim 11
Dependent Claim
18 words
The portable computer of claim 9 and wherein said display monitor includes a full screen liquid crystal display.
Claim 12
Dependent Claim
15 words
The portable computer of claim 10 and wherein said keyboard is a full size keyboard.
Claim 13
Dependent Claim
17 words
The portable computer of claim 11 and wherein said disk drive means comprises two disk drive units.
Claim 14
Dependent Claim
17 words
The portable computer of claim 12 and further including a battery pack removably mounted in said housing.
Claim 15
Dependent Claim
26 words
The portable computer of claim 13 and wherein said base, said rear top cover and said foot door are each unitary structures made of molded plastic.
Claim 16
Dependent Claim
19 words
The portable computer of claim 14 and wherein said front top cover includes a cover plate and a bezel.
Claim 17
Dependent Claim
164 words
A housing for a portable computer, said housing being constructed for resting on a surface and comprising a base, a front top cover, a rear top cover and a foot door, said base including a bottom wall having a generally flat front section and a generally flat rear section, said generally flat front section being angled relative to said generally flat rear section, said rear top cover being secured to said base, said front top cover being pivotally mounted on said rear top cover, said foot door being mounted on said generally flat rear section and movable from a closed position to an open position for selectively tilting said housing in a forwardly direction, said portable computer being usable in both said tilted and said untilted positions and resting on said generally flat rear section of said bottom wall when in an untilted position and on said generally flat front section of said bottom wall and said foot door when in a tilted position.
Claim 18
Dependent Claim
164 words
A housing for a portable computer, said housing being constructed for resting on a surface and comprising a base, a front top cover, a rear top cover and a foot door, said base including a bottom wall having a generally flat front section and a generally flat rear section, said generally flat front section being angled relative to said generally flat rear section, said rear top cover being secured to said base, said front top cover being pivotally mounted on said rear top cover, said foot door being mounted on said generally flat rear section and movable from a closed position to an open position for selectively tilting said housing in a forwardly direction, said portable computer being usable in both said tilted and said untilted positions and resting on said generally flat rear section of said bottom wall when in an untilted position and on said generally flat front section of said bottom wall and said foot door when in a tilted 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) | 1991-05-03 | 1991-11-02 | 1992-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-03 | 1995-11-02 | 1996-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-03 | 1999-11-02 | 2000-05-03 | $7700.00 | Window Closed / Lapsed |