US4504780A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Test probe
Assignee: Individual
•
Filing: 1982-08-25
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Granted: 1985-03-12
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Expires: 2002-08-25
Abstract
Abstract A test probe has a housing that releasably receives a plunger that is normally urged out of the housing by a spring, and which has a probe contact end normally lying external of the housing. The plunger has a compressible enlargement that normally engages a stop on the housing, but with sufficient force being exerted, may be removed from the housing.
Inventors
- 👤 John R. Marsella
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:55
CPC Classifications
G; G01; G01R; G01R1/00; G01R1/02; G01R1/06; G01R1/067; G01R1/06711; G01R1/06716; G01R1/06722
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
105 words
A test probe comprising an elongated tubular housing; a plunger received in said housing, said plunger having a probe end external to the housing and an enlargement at the inner end thereof slidably engaging the inner wall of the housing; a compression spring in said housing urging the plunger out of the housing; an inwardly directed detent means on the housing forming a stop for outward movement of the plunger; said enlargement having at least a portion thereof urged outwardly and compressible inwardly whereby the enlargement provides a low electrical resistance connection to the housing and yet permits removal of the plunger from the housing.
Claim 2
Dependent Claim
105 words
A test probe comprising an elongated tubular housing; a plunger received in said housing, said plunger having a probe end external to the housing and an enlargement at the inner end thereof slidably engaging the inner wall of the housing; a compression spring in said housing urging the plunger out of the housing; an inwardly directed detent means on the housing forming a stop for outward movement of the plunger; said enlargement having at least a portion thereof urged outwardly and compressible inwardly whereby the enlargement provides a low electrical resistance connection to the housing and yet permits removal of the plunger from the housing.
Claim 3
Dependent Claim
25 words
A probe as in claim 1 wherein the enlargement of the plunger is bifurcated and the portion urged outwardly is formed by the legs thereof.
Claim 4
Dependent Claim
22 words
A probe as in claim 1 wherein the enlargement is provided with a reduced end portion that extends within the compression spring.
Claim 5
Dependent Claim
13 words
A probe as in claim 1 wherein the enlargement has inwardly tapered ends.
Claim 6
Dependent Claim
23 words
A probe as in claim 1 wherein the plunger is provided with a recess in its exterior to facilitate removal from the housing.
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) | 1988-03-11 | 1988-09-10 | 1989-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-11 | 1992-09-10 | 1993-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-11 | 1996-09-10 | 1997-03-12 | $7700.00 | Window Closed / Lapsed |