US3979570A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Switching apparatus
Assignee: Tokai Rika Co Ltd
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Filing: 1974-05-14
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Granted: 1976-09-07
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Expires: 1994-05-14
Abstract
Abstract An on-off switch comprising a contact element of conductive elastomeric material for establishing a current path between a pair of terminals, a movable member for imparting a compressing force to the contact element, and an actuator for actuating the movable member. When the movable member is actuated by the actuator to compress the contact element, the contact element is rendered electrically conductive to electrically connect the terminals with each other thereby turning on the switch.
Inventors
- 👤 Masayoshi Hyodo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:53
CPC Classifications
H; H01; H01H; H01H1/00; H01H1/02; H01H1/021; H01H1/029; H01H13/00; H01H13/02; H01H13/10; H01H35/00; H01H35/24; H01H35/34
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
168 words
A switching apparatus comprising: a switch casing, a plurality of terminals connected to an electric circuit, a holder of electrical insulating material fixedly supporting at least one of said terminals, at least one contact element of conductive elastomeric material disposed to be engageable with said terminals, a movable member for imparting a compressing force to said contact element, and actuating means disposed in said switch casing for actuating said movable member, said holder being firmly secured to said switch casing, said actuating means comprising a fluid-operated actuator including a fluid passage and a fluid reserving space formed in said switch casing for communication with a source of fluid pressure, said contact element being normally compressed by the force of a spring so that said contact element is electrically conductive when said fluid-operated actuator is not in operation, and said diaphragm acting to release said contact elememt from the compressed state through a slider against the force of said spring when said fluid operated actuator is placed in operation.
Claim 2
Dependent Claim
168 words
A switching apparatus comprising: a switch casing, a plurality of terminals connected to an electric circuit, a holder of electrical insulating material fixedly supporting at least one of said terminals, at least one contact element of conductive elastomeric material disposed to be engageable with said terminals, a movable member for imparting a compressing force to said contact element, and actuating means disposed in said switch casing for actuating said movable member, said holder being firmly secured to said switch casing, said actuating means comprising a fluid-operated actuator including a fluid passage and a fluid reserving space formed in said switch casing for communication with a source of fluid pressure, said contact element being normally compressed by the force of a spring so that said contact element is electrically conductive when said fluid-operated actuator is not in operation, and said diaphragm acting to release said contact elememt from the compressed state through a slider against the force of said spring when said fluid operated actuator is placed in operation.
Claim 3
Dependent Claim
43 words
A switching apparatus as claimed in claim 1, wherein a slider constituting a part of said actuating means is slidably mounted in said switch casing and carries said movable member at one end thereof, and said terminals are firmly secured to said holder.
Claim 4
Dependent Claim
29 words
A switching apparatus as claimed in claim 1, wherein said contact element is fixed to a flexible strip of electrical insulator which is flexibly supported in said switch casing.
Claim 5
Dependent Claim
19 words
A switching apparatus as claimed in claim 1, wherein said contact element is directly fixed to said movable member.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-07 | 1980-03-08 | 1980-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-07 | 1984-03-08 | 1984-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-07 | 1988-03-08 | 1988-09-07 | $7700.00 | Window Closed / Lapsed |