Patent US3875644A successfully refreshed from Google Patents.
US3875644A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic brake tube seat replacement tool
Assignee: Individual
•
Filing: 1973-07-20
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Granted: 1975-04-08
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Expires: 1993-07-20
Abstract
Abstract An elongated shaft is provided with a coaxial socket in one end removably receiving a brake master cylinder tube seat supporting a mandrel. A sleeve longitudinally slidably surrounds the shaft between a pair of spaced-apart stops for driving the shaft toward and away from a tube seat position in response to manual movement of the sleeve.
Inventors
- 👤 Olen W Simpson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:09
CPC Classifications
B; B25; B25B; B25B27/00; B25B27/02; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53796; Y10T29/53839
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
143 words
A repair tool for removing and replacing a centrally bored tube seat in brake master cylinder ports, comprising: an elongated shaft having a coaxial socket forming bore in one of its ends, said shaft having a hemispherical recess formed therein coaxial with the socket forming bore for nesting one end portion of a tube seat; tube supporting means including a pin-like mandrel having one end portion fixed within the shaft socket and projecting, at its other end portion, beyond said shaft a distance at least equal to the length of the bore of a tube seat to be replaced; a stop pin transversely secured to said shaft intermediate its ends; a stop block secured to the other end of said shaft; and, a sleeve slidably disposed on said shaft between and movable toward and away from said stop pin and said stop block.
Claim 2
Dependent Claim
143 words
A repair tool for removing and replacing a centrally bored tube seat in brake master cylinder ports, comprising: an elongated shaft having a coaxial socket forming bore in one of its ends, said shaft having a hemispherical recess formed therein coaxial with the socket forming bore for nesting one end portion of a tube seat; tube supporting means including a pin-like mandrel having one end portion fixed within the shaft socket and projecting, at its other end portion, beyond said shaft a distance at least equal to the length of the bore of a tube seat to be replaced; a stop pin transversely secured to said shaft intermediate its ends; a stop block secured to the other end of said shaft; and, a sleeve slidably disposed on said shaft between and movable toward and away from said stop pin and said stop block.
Claim 3
Dependent Claim
37 words
The tool according to claim 1 in which said other end portion of said mandrel is provided with external threads adapted to engage and grip the wall forming the bore of a tube seat to be removed.
References Cited (Backward Citations)
US3030837A
Cited
US3783492A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |