← Back to Patent Explorer
US4253013A Expired / Lapsed US ⏱️ 0.0 years remaining

Electric heating device for warming the shaving head of an electric shaver

Assignee: Mabuchi Motor Co Ltd
•
Filing: 1978-08-11
•
Granted: 1981-02-24
•
Expires: 1998-08-11
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract The shaver warmer of this invention includes a heat transfer portion which almost closely fits the shaver head of the electric shaver to be warmed. A heat supply portion is directly connected to the heat transfer portion and a temperature control portion controls the heating temperature by detecting the temperature of the heat transfer portion. The shaving head of the electric shaver can thereby be heated to a predetermined temperature in a relatively short time so that advantage may be taken of the relatively large thermal capacity of the shaving head of an electric shaver.

Inventors

  • 👤 Kenichi Mabuchi

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 09:09
CPC Classifications
H; H05; H05B; H05B3/00; H05B3/68; A; A45; A45D; A45D27/00

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 263 words
A shaver warmer comprising a plurality of separate, spaced apart cup-shaped members, each defined by a vertical, resin coated shaving head support wall and a horizontal bottom wall, each of said cup-shaped members being of a size and shape as to substantially closely fit the shaving head of a shaver for supporting and heating the shaving head of the shaver, a plate-like heat supply portion in heat transfer contact with the entire bottom wall of each of said cup-shaped members for supplying thermal energy thereto, the cup-shaped member being placed directly on the heat supply portion, said heat supply portion being comprised of a heating wire, two heat resistant, electrically insulating plates between which the heating wire is interposed and a planar, metallic heat transfer plate interposed between one of the insulating plates and the bottom wall of each of said cup-shaped members, said metallic plate directly contacting the bottom wall of each cup-shaped member to supply heat thereto, each cup-shaped member heated by the heat supply portion being adapted to heat the shaving head resting on the bottom wall of the cup-shaped member, and a temperature control means responsive to the temperature of the heat transfer plate controlling the supply of thermal energy from the heat supply portion to the cup-shaped members to maintain the temperature of the cup-shaped members in a predetermined temperature range, the temperature control means including a temperature control sensing element mounted in direct contact with said metallic heat transfer plate for controlling the temperature of said cup-shaped members by detecting the temperature of the heat transfer plate.
Claim 2
Dependent Claim 263 words
A shaver warmer comprising a plurality of separate, spaced apart cup-shaped members, each defined by a vertical, resin coated shaving head support wall and a horizontal bottom wall, each of said cup-shaped members being of a size and shape as to substantially closely fit the shaving head of a shaver for supporting and heating the shaving head of the shaver, a plate-like heat supply portion in heat transfer contact with the entire bottom wall of each of said cup-shaped members for supplying thermal energy thereto, the cup-shaped member being placed directly on the heat supply portion, said heat supply portion being comprised of a heating wire, two heat resistant, electrically insulating plates between which the heating wire is interposed and a planar, metallic heat transfer plate interposed between one of the insulating plates and the bottom wall of each of said cup-shaped members, said metallic plate directly contacting the bottom wall of each cup-shaped member to supply heat thereto, each cup-shaped member heated by the heat supply portion being adapted to heat the shaving head resting on the bottom wall of the cup-shaped member, and a temperature control means responsive to the temperature of the heat transfer plate controlling the supply of thermal energy from the heat supply portion to the cup-shaped members to maintain the temperature of the cup-shaped members in a predetermined temperature range, the temperature control means including a temperature control sensing element mounted in direct contact with said metallic heat transfer plate for controlling the temperature of said cup-shaped members by detecting the temperature of the heat transfer plate.
Claim 3
Dependent Claim 56 words
A shaver warmer as set forth in claim 1 wherein the temperature control means includes contacts that are electrically connected to be heating wire and the temperature sensing element comprises a bimetal for making and breaking the contacts, the bimetal being comprised of a resin plate and a metal plate that are secured to each other.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1984-02-24 1984-08-25 1985-02-24 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1988-02-24 1988-08-25 1989-02-24 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1992-02-24 1992-08-25 1993-02-24 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag