Patent US3867871A successfully refreshed from Google Patents.
US3867871A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Piston-to-rod detachable connection
Assignee: International Motors LLC
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Filing: 1973-04-26
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Granted: 1975-02-25
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Expires: 1993-04-26
Abstract
Abstract Detachable connection of a piston onto a reduced diameter section of a rod, at a location thereon between spaced apart shoulders provided by the reduced diameter section. The piston is wedged into final tightness by clamped double angle wedging segments, the clamping being accomplished by a plurality of diametric pairs of threaded, piston hold-down devices.
Inventors
- 👤 Daniel B Shore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:31
CPC Classifications
F; F16; F16J; F16J1/00; F16J1/10; F16J1/12; F16B; F16B3/00; F16B2200/00; F16B2200/40; F16B2200/406; Y; Y10; Y10T; Y10T74/00; Y10T74/21; Y10T74/2142
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
162 words
Detachably connected assembly comprising: a piston rod provIded with a piston shoulder, and a shoulder confronting the piston shoulder with a space therebetween, and so spaced apart therefrom as to be in a position more near to the rod end; and a piston thereon in the space between the shoulders, having carrying means and carrying thereby longitudinally adjustable hold-down means including an endless clamping ring, the plane of which ring being at least in near vicinity to the near shoulder; said piston, clamping ring, and near shoulder having interposed split locking ring means, said means presenting at least first and second wedging surfaces wedged against the clamping ring and against the near shoulder on respective mating surfaces of the latter so that the active engagement, in response to pressure of adjustment of the hold-down means, wedges said interposed split ring means between the piston and near shoulder to a radially inward locking position locking the piston in compression on the piston shoulder.
Claim 2
Dependent Claim
162 words
Detachably connected assembly comprising: a piston rod provIded with a piston shoulder, and a shoulder confronting the piston shoulder with a space therebetween, and so spaced apart therefrom as to be in a position more near to the rod end; and a piston thereon in the space between the shoulders, having carrying means and carrying thereby longitudinally adjustable hold-down means including an endless clamping ring, the plane of which ring being at least in near vicinity to the near shoulder; said piston, clamping ring, and near shoulder having interposed split locking ring means, said means presenting at least first and second wedging surfaces wedged against the clamping ring and against the near shoulder on respective mating surfaces of the latter so that the active engagement, in response to pressure of adjustment of the hold-down means, wedges said interposed split ring means between the piston and near shoulder to a radially inward locking position locking the piston in compression on the piston shoulder.
Claim 3
Dependent Claim
59 words
The invention of claim 1, characterized by: the endless clamping ring, as viewed in cross section with the rod end extending in one vertical direction, presenting a downwardly and outwardly sloped surface forming one of said mating surfaces and actively engaging the first wedging surface in the described way, said first wedging surface being complementary to said sloped surface.
Claim 4
Dependent Claim
63 words
The invention of claim 2, further characterized by: the near shoulder on the piston rod, when the latter is viewed with the rod end extending in one vertical direction, presenting an upwardly and outwardly inclined surface forming another of said mating surfaces and actively engaging the second wedging surface in the described way, said second wedging surface being complementary to said inclined surface.
Claim 5
Dependent Claim
20 words
The invention of claim 1, wherein the split locking ring means is composed of segments exceeding a pair in number.
Claim 6
Dependent Claim
37 words
The invention of claim 1, the hold-down means characterized by threaded hold-down devices between the endless ring and the piston to clamp down on the interposed split locking ring means, the devices exceeding a pair in number.
Claim 7
Dependent Claim
38 words
The invention of claim 1, characterized by the hold-down means comprising individual threaded devices and the split locking ring means comprising individual ring segments, there being at least two pairs of threaded devices and two pairs of segments.
Claim 8
Dependent Claim
37 words
The invention of claim 1, there being angularity to the slopes of the respective first and second wedging surfaces engaged by the clamping ring and near shoulder so as to present oppositely sloping surfaces to the latter.
Claim 9
Dependent Claim
33 words
The invention of claim 1, the adjustable hold-down means characterized by threaded fastener means in the carrying means on the piston and received noninterferingly in radial slots in said split locking ring means.
Claim 10
Dependent Claim
46 words
The invention of claim 4, the split locking ring means being relieved along the radially outer portion of its interface of engagement with the piston whereby the piston and each segment at said radially outer portion of the interface of engagement have predetermined clearance preventing contact.
Claim 11
Dependent Claim
45 words
The invention of claim 9, the near shoulder characterized by a rod groove defining the near shoulder and undercutting said interface of engagement, whereby a radially inner portion of said interface of engagement of each segment overhangs the piston by a clearance gap preventing contact.
References Cited (Backward Citations)
US936717A
Cited
US1294792A
Cited
US2211717A
Cited
US2979903A
Cited
US3397893A
Cited
US3426656A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-24 | 1978-08-26 | 1979-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-24 | 1982-08-26 | 1983-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-24 | 1986-08-26 | 1987-02-25 | $7700.00 | Window Closed / Lapsed |