US4836751A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Detachable electric fan
Assignee: Individual
•
Filing: 1988-07-25
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Granted: 1989-06-06
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Expires: 2008-07-25
Abstract
Abstract A detachable electric fan and more particularly a built-up electric fan comprising component parts of detachable stand and one set of built-up blade-protective covers for easy carriage and storage; a stand being consisted of a transverse base plate having a connection trough at the top in the center with rib channels provided, and an independent vertical frame plate having a control switch button set mounted thereon and elastic retainers and reinforcing ribs at the bottom for connection with the base plate; the blade-protective cover symmetrically arranged, each blade-protective cover being composed of two semi-circular cover plates with one symmetric set of pin holder and locking pin for easy assembly, each blade-protective cover being supported with a circular supporting plate by bolts, the rear blade-protective cover having an axial hole for insertion of motor shaft to let the fan blades be well protected; by the built-up component parts to form a detachable electric fan for easy carriage and to reduce the storage space and manufacturing cost.
Inventors
- 👤 Ssu-Liu Liu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 17:04
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/60; F04D29/64; F04D29/644; F04D29/646
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
359 words
A detachable electric fan composed of a stand, a fan motor, one set of fan blades, and a fan cover, characterized in that said stand comprising a detachable transverse base plate and a vertical frame plate, said transverse base plate comprising a stepped trough with an upper check edge provided at the top and a plurality of rib channels arranged on the wall surface around the four sides of the trough to match with the lower protruding portion of the vertical frame plate, said vertical frame plate comprising a closed type of control switch button set; the front and rear blade-protective cover plates of said fan cover being respectively composed of one pair of symmetric semi-cover plates, each of said semi-cover plate comprising a semi-circular central plate, the semi-circular central plate of the front blade-protective cover plate being completely closed, and the semi-circular central plate of the rear blade-protective cover plate comprising an axial hole for insertion of motor shaft, the arc portion of each semi-circular central plate comprising one set of raidal ribs around the periphery at equal intervals, said radial ribs being connected together by means of a frame ring plate, said frame ring plate comprising a socket at one end and a extending plug portion at the other end to match with the other frame ring plateof the other semi-circular central plate, each of semi-circular central plate also comprising by the straight edge a locking pin and a pin holder to reciprocally match with the pin holder and the locking pin of the other central plate for fixation of said two central plates into one circular plate to form a front blade protective cover plate or a rear blade-protective cover plates being respectively assembled, they both being connected together and respectively supported by one inner supporting plate having plurality of bolt holes and another inner supporting plate having a plurality of bolt holes and one axial hole by means of bolts through said bolt holes and the connection holes of the respective central plates and then the periphery of both blade-protective cover plates being tightly connected together by a pressure ring belt to complete the assembly.
Claim 2
Dependent Claim
359 words
A detachable electric fan composed of a stand, a fan motor, one set of fan blades, and a fan cover, characterized in that said stand comprising a detachable transverse base plate and a vertical frame plate, said transverse base plate comprising a stepped trough with an upper check edge provided at the top and a plurality of rib channels arranged on the wall surface around the four sides of the trough to match with the lower protruding portion of the vertical frame plate, said vertical frame plate comprising a closed type of control switch button set; the front and rear blade-protective cover plates of said fan cover being respectively composed of one pair of symmetric semi-cover plates, each of said semi-cover plate comprising a semi-circular central plate, the semi-circular central plate of the front blade-protective cover plate being completely closed, and the semi-circular central plate of the rear blade-protective cover plate comprising an axial hole for insertion of motor shaft, the arc portion of each semi-circular central plate comprising one set of raidal ribs around the periphery at equal intervals, said radial ribs being connected together by means of a frame ring plate, said frame ring plate comprising a socket at one end and a extending plug portion at the other end to match with the other frame ring plateof the other semi-circular central plate, each of semi-circular central plate also comprising by the straight edge a locking pin and a pin holder to reciprocally match with the pin holder and the locking pin of the other central plate for fixation of said two central plates into one circular plate to form a front blade protective cover plate or a rear blade-protective cover plates being respectively assembled, they both being connected together and respectively supported by one inner supporting plate having plurality of bolt holes and another inner supporting plate having a plurality of bolt holes and one axial hole by means of bolts through said bolt holes and the connection holes of the respective central plates and then the periphery of both blade-protective cover plates being tightly connected together by a pressure ring belt to complete the assembly.
Claim 3
Dependent Claim
82 words
A detachable electric fan according to claim 1 wherein the bottom retaining portion of said vertical frame plate protrudes downward in a reduced size and comprises a lower check edge having a plurality of elastic retainers to form a recessed space with the upper check edge of the vertical frame plate, said recessed space comprising a plurality of reinforcing ribs on the wall surface around the four sides to match with the rib channels of the trough of the tranverse base plate.
Claim 4
Dependent Claim
77 words
A detachable electric fan according to claim 1 wherein said rib channels and said reinforcing ribs being respectively arranged on the four sides of the wall surface of the trough of the base plate and the retaining portion of the vertical frame plate in a reciprocal way such that each rib being inserted into a respective rib channel upon fixation of said transverse base plate with said vertical frame plate to strengthen the stability of the assembly.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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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) | 1992-06-05 | 1992-12-05 | 1993-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-05 | 1996-12-05 | 1997-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-05 | 2000-12-05 | 2001-06-06 | $7700.00 | Window Closed / Lapsed |