US3740814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stud extractor
Assignee: Individual
•
Filing: 1971-06-03
•
Granted: 1973-06-26
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Expires: 1991-06-03
Abstract
Abstract A hand-operated device for extracting studs from engine blocks or the like embodies an internally screw-threaded body portion having a turning handle means. An intermediate adapter has external and internal threads which enable the adapter to be screwed into the body portion and over the screw threads of an anchored stud. An abutment collar or spacer is interposed between the face of the member in which the stud is anchored and the opposing end of the rotatable body portion. The device has the additional capability of extracting studs which have been broken off above or below the face of the member which holds the studs.
Inventors
- 👤 C Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:29
CPC Classifications
B; B25; B25B; B25B23/00; B25B23/02; B25B23/08; B25B23/10; B25B23/103; B25B27/00; B25B27/14; B25B27/18; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53796; Y10T29/53848; Y10T29/53857; Y10T29/53878; Y10T29/53883
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
143 words
A device for extracting a press fitted stud from a member, said stud having a threaded portion projecting beyond the member within which it is anchored, said device comprising an adapter having external screw threads and an internally threaded opening, said internally threaded opening of the adapter receiving the threaded portion of the stud therein, a body portion substantially longer than the adapter and having an internally screw threaded bore receiving the external screw-threads of the adapter, said body portion being telescopically engaged over the adapter and extending above the adapter and having a leading abutment end projecting somewhat below the bottom of the adapter for contact with a stationary reaction face on said member, and turning means located on the body portion on the end opposite said abutment end to facilitate turning it on the axis of the stud to be extracted.
Claim 2
Independent Claim
143 words
A device for extracting a press fitted stud from a member, said stud having a threaded portion projecting beyond the member within which it is anchored, said device comprising an adapter having external screw threads and an internally threaded opening, said internally threaded opening of the adapter receiving the threaded portion of the stud therein, a body portion substantially longer than the adapter and having an internally screw threaded bore receiving the external screw-threads of the adapter, said body portion being telescopically engaged over the adapter and extending above the adapter and having a leading abutment end projecting somewhat below the bottom of the adapter for contact with a stationary reaction face on said member, and turning means located on the body portion on the end opposite said abutment end to facilitate turning it on the axis of the stud to be extracted.
Claim 3
Dependent Claim
47 words
The structure of claim 1, and an abutment collar interposed between the leading end of said body portion and a face of said member in which said stud is anchored, said abutment collar having a through body enabling the collar to be placed removably over said stud.
Claim 4
Dependent Claim
48 words
The structure of claim 2, and said abutment collar having an annular shoulder directly engageable with the leading end of said body portion and a reduced cylindrical extension projecting axially beyond said shoulder, the body portion having a cylindrical recess in its leading end receiving said cylindrical extension.
Claim 5
Dependent Claim
77 words
The structure of claim 3, and a threading die element removably mountable within said recess of the body portion so that the body portion and die may be manipulated separately from the adapter to produce screw-threads on a stud broken off above the member in which it is anchored, the body portion subsequently used with said adapter while threadedly engaged therewith and while the adapter bore is threadedly engaged with the broken stud to extract the stud.
Claim 6
Dependent Claim
62 words
The structure of claim 2, and a connector element having a first screw-threaded end portion engageable in the threaded bore of the adapter and a second screw-threaded end portion engageable in a tapped opening in a stud which is broken off below a surface of a member in which it is anchored, the bore of said collar receiving said connector element therethrough.
Claim 7
Dependent Claim
28 words
The structure of claim 1, and the threaded portion of said stud and all of the screw-threads of said adapter and body portion being of the same hand.
Claim 8
Dependent Claim
14 words
The structure of claim 6, and all of said screw-threads being right hand threads.
Claim 9
Dependent Claim
62 words
The structure of claim 1, and said turning means comprising a rod extending transversely of the body portion near its end remote from the stud, the body portion having a transverse through bore receiving the rod so that the latter may extend beyond opposite sides of the body portion, and yielding detent means removably securing said rod within said transverse through bore.
Claim 10
Dependent Claim
89 words
The structure of claim 3, and said internally screw-threaded bore of the body portion being coaxial with the through bore of the collar and with said cylindrical recess of the body portion and being of reduced diameter relative to the diameter of the cylindrical recess, the bore of the body portion being of sufficient length to contain bodily the adapter and enabling the adapter to be screwed into the body portion completely with the leading end of the adapter disposed inwardly of the leading end of the body portion.
Claim 11
Dependent Claim
51 words
The structure of claim 9, and a wrench-engageable lug formed on one end of the body portion and said adapter to facilitate turning the same, said body portion, adapter, collar and said stud being coaxially arranged and concentric when the device is in a use position with respect to the stud.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |