Patent US4043150A successfully refreshed from Google Patents.
US4043150A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Safety sleeve
Assignee: Individual
•
Filing: 1976-02-26
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Granted: 1977-08-23
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Expires: 1996-02-26
Abstract
Abstract A safety sleeve shields the working members of a well tool wherein two shoulders come together to eliminate the possibility of workmen loosing a finger between the two shoulders.
Inventors
- 👤 August B. Baumstimler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:45
CPC Classifications
E; E21; E21B; E21B41/00; E21B41/0021; E21B27/00; E21B37/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
99 words
In a clean out well tool for removing debris from a well, said tool having a. an elongated tubular body member, b. a tubular head member, c. said members slidingly telescoped together, d. a body shoulder on the body member, e. a head shoulder on the head member, f. said shoulders coming together to form a stop to limit the sliding telescoping movement between the members; g. THE IMPROVED SAFETY DEVICE COMPRISING IN COMBINATION WITH THE ABOVE: h. a sleeve attached to one of said members, i. holes in the sleeve, j. said sleeve telescoped over the other member.
Claim 2
Dependent Claim
99 words
In a clean out well tool for removing debris from a well, said tool having a. an elongated tubular body member, b. a tubular head member, c. said members slidingly telescoped together, d. a body shoulder on the body member, e. a head shoulder on the head member, f. said shoulders coming together to form a stop to limit the sliding telescoping movement between the members; g. THE IMPROVED SAFETY DEVICE COMPRISING IN COMBINATION WITH THE ABOVE: h. a sleeve attached to one of said members, i. holes in the sleeve, j. said sleeve telescoped over the other member.
Claim 3
Dependent Claim
24 words
The invention as defined in claim 1 with an additional limitation of k. said members and said sleeve all having the same outside diameter.
Claim 4
Dependent Claim
48 words
The invention as defined in claim 2 with additional limitations of m. a recessed portion on the member over which said sleeve telescopes, and n. a tapered shoulder between the recessed portion and the portion of the member having an outside diameter equal to that of the sleeve.
Claim 5
Dependent Claim
38 words
The invention as defined in claim 3 with an additional limitation of o. said length of the recessed portion at least equal to the distance from the shoulder of the attached member to the end of the sleeve.
Claim 6
Dependent Claim
17 words
The invention as defined in claim 4 wherein said attachment of the sleeve is by threaded joint.
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) | 1980-08-22 | 1981-02-21 | 1981-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-22 | 1985-02-21 | 1985-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-22 | 1989-02-21 | 1989-08-23 | $7700.00 | Window Closed / Lapsed |