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US4022548A Expired / Lapsed US ⏱️ 0.0 years remaining

Air circulating fan and motor with separable safety guard

Assignee: Individual
•
Filing: 1976-04-02
•
Granted: 1977-05-10
•
Expires: 1996-04-02
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Abstract

Abstract The open wire grid safety guard enclosure for a fan and its motor is rectangular box-like in shape and is made up of two substantially identical halves. Each half is made from identical cruciform blanks of grid mesh wires with parallel closely spaced wires extending in one direction and connected by more widely spaced cross wires, including marginal cross wires at the ends of the arms of the cross form. The arms of the cross form are bent inwardly of the box form through an angle of about 105° from the planes of the centers of the blank. Hinge means connect the opposed marginal wires along one side edge of the box and are recessed inwardly of the planes of the outer edges of the sides by the angle of the bent arms. Releasable latch means connect other marginal wires at points spaced from the side with the hinge means. A plate welded to the center of one side of the box carries supporting connections to a fan motor and fan blade enclosed in the box. A hanger loop releasably connects the adjacent edges of the box opposite the hinge means.

Inventors

  • 👤 Gordon McLarty

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-26 21:25
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/70; F04D29/701; F04D29/703; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2193

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 182 words
A portable electric fan having a motor and a fan blade mounted within an enclosure, said enclosure comprising two identical box-like halves with short side walls on each edge of a square center wall, said halves being made from cruciform blanks of wire grid material having closely spaced parallel wires connected by more widely spaced crossing wires with marginal wires along the outer edges of the arms of the blanks, the arms of the blanks being bent inwardly in opposed relation to the ends of each other, with the ends of at least two opposed arms being bent at least 105° from the planes of the centers of the walls to which they are connected, hinge means connecting the marginal wires on the ends of said last two of said arms and recessed into said enclosure when the halves are closed, releasable latch means connecting the opposed ends of other opposed arms of said blanks in spaced relation to said hinge means, and a mounting plate welded to the center of one of said halves and receiving mounting connections from said motor.
Claim 2
Dependent Claim 182 words
A portable electric fan having a motor and a fan blade mounted within an enclosure, said enclosure comprising two identical box-like halves with short side walls on each edge of a square center wall, said halves being made from cruciform blanks of wire grid material having closely spaced parallel wires connected by more widely spaced crossing wires with marginal wires along the outer edges of the arms of the blanks, the arms of the blanks being bent inwardly in opposed relation to the ends of each other, with the ends of at least two opposed arms being bent at least 105° from the planes of the centers of the walls to which they are connected, hinge means connecting the marginal wires on the ends of said last two of said arms and recessed into said enclosure when the halves are closed, releasable latch means connecting the opposed ends of other opposed arms of said blanks in spaced relation to said hinge means, and a mounting plate welded to the center of one of said halves and receiving mounting connections from said motor.
Claim 3
Dependent Claim 38 words
A portable electric fan as defined in claim 1 in which all of the arms of each of said blanks are turned inwardly of said enclosure about 105° from the planes of the outer ends of said blanks.

References Cited (Backward Citations)

DE625522C Cited
US2345516A Cited
US2617583A Cited
US2624504A Cited
FR1041632A Cited
US2728519A Cited
US3725640A Cited
US3787142A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1980-05-09 1980-11-08 1981-05-10 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1984-05-09 1984-11-08 1985-05-10 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1988-05-09 1988-11-08 1989-05-10 $7700.00 Window Closed / Lapsed

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