US3909916A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Component removal tool
Assignee: Cummins Inc
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Filing: 1974-06-21
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Granted: 1975-10-07
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Expires: 1994-06-21
Abstract
Abstract A tool for removing an annular oil seal assembly from an engine housing from which a crankshaft projects. The tool comprises a circular plate secured to the end face of the crankshaft by screws and a plurality of puller screws. Each puller screw has a feed section with machine threads and a nose section including a drill point and self-taping threads. The feed sections of the puller screws are threaded through the circular plate in line with the seal support element. Rotation of the puller screws advances the drill points to penetrate the seal support element permitting the self-taping threads to screw into it. Removal of the screws holding the plate to the crankshaft permits a center bolt to be threaded through the plate and against the crankshaft thereby pulling the seal assembly from the housing. The plate may also be used to install a seal element.
Inventors
- 👤 Robert L Neff
- 👤 Charles R Mote
- 👤 James E Mcnaulty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:00
CPC Classifications
B; B25; B25B; B25B27/00; B25B27/0028; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53657; Y10T29/53796; Y10T29/53848; Y10T29/53857; Y10T29/53861
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
105 words
Apparatus for removing a component received in a recess in a housing, said apparatus comprising: a base adapted to be releasably fixed relative to said housing: at least one puller screw having a feed section with machine threads threadedly engaging said base in line with said component, said puller screw having a nose section including a drill point and self-taping threads for penetrating into said component as said puller screw is threaded into said base; and an element removably connected to said base and having an end face displaceable therefrom for displacing said base away from said housing thereby removing said component from said recess.
Claim 2
Dependent Claim
105 words
Apparatus for removing a component received in a recess in a housing, said apparatus comprising: a base adapted to be releasably fixed relative to said housing: at least one puller screw having a feed section with machine threads threadedly engaging said base in line with said component, said puller screw having a nose section including a drill point and self-taping threads for penetrating into said component as said puller screw is threaded into said base; and an element removably connected to said base and having an end face displaceable therefrom for displacing said base away from said housing thereby removing said component from said recess.
Claim 3
Dependent Claim
40 words
Apparatus as in claim 1 wherein the number of threads per unit length is greater for said feed section than said nose section whereby said component is pulled against said base as said puller screw is threaded through said base.
Claim 4
Dependent Claim
52 words
Apparatus as in claim 1 wherein said component is annular in form and wherein: said base extends at least as far as the perimeter of said annular component; and, said apparatus has a plurality of puller screws positioned about said base in positions corresponding to circumferentially spaced points on said annular component.
Claim 5
Dependent Claim
44 words
Apparatus as in claim 3 wherein: said puller screws are spaced from one another about said base in positions corresponding to equal circumferential positions around said annular component; and, said element is positioned so that it is symmetrical with respect to said puller screws.
Claim 6
Dependent Claim
186 words
Apparatus for removing an annular component received in a recess in a housing, said apparatus comprising: a base extending at least as far as the perimeter of said annular component and adapted to be releasably fixed relative to said housing; a plurality of puller screws positioned about said base in positions corresponding to equal circumferential intervals around said annular component, said puller screws having a feed section with machine threads threadedly engaging said base in line with said component, said puller screw having a nose section including a drill point and self-taping threads for penetrating into said component as said puller screw is threaded into said base, the number of threads per unit length being greater for said feed section than said nose section whereby said component is pulled against said base as said puller screw is threaded through said base; and an element threadedly engaging said base at a position symmetrical with respect to said puller screws and adapted to be rotated so that said threaded element projects from said base to displace said base relative to said housing removing said component from said recess.
Claim 7
Dependent Claim
186 words
Apparatus for removing an annular component received in a recess in a housing, said apparatus comprising: a base extending at least as far as the perimeter of said annular component and adapted to be releasably fixed relative to said housing; a plurality of puller screws positioned about said base in positions corresponding to equal circumferential intervals around said annular component, said puller screws having a feed section with machine threads threadedly engaging said base in line with said component, said puller screw having a nose section including a drill point and self-taping threads for penetrating into said component as said puller screw is threaded into said base, the number of threads per unit length being greater for said feed section than said nose section whereby said component is pulled against said base as said puller screw is threaded through said base; and an element threadedly engaging said base at a position symmetrical with respect to said puller screws and adapted to be rotated so that said threaded element projects from said base to displace said base relative to said housing removing said component from said recess.
Claim 8
Dependent Claim
102 words
Apparatus as in claim 5 wherein said component is a seal including an annular relatively thin wall support for a seal element and said housing comprises a housing having a recess in which said seal is received and through which the end face of a shaft projects for engagement with said seal and wherein said apparatus has three puller screws spaced from one another about said base in positions corresponding to generally equal circumferential positions around said seal support and wherein said element is positioned substantially along the axis of said shaft thereby making it symmetrical with respect to said puller screws.
Claim 9
Dependent Claim
20 words
Apparatus as in claim 6 further comprising means for releasably securing said base to the end face of said shaft.
Claim 10
Dependent Claim
29 words
Apparatus as in claim 7 wherein said releasable securing means comprises a series of threaded elements extending through the base and threadedly engaging the end face of said shaft.
Claim 11
Dependent Claim
45 words
Apparatus as in claim 8 wherein said base is circular and has an annular face projecting from one face thereof whereby said circular base may be used to install a seal when said threaded elements pulls said base against the end face of said shaft.
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) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |