US3839805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Open side ground engaging tip
Assignee: Caterpillar Inc
•
Filing: 1972-09-29
•
Granted: 1974-10-08
•
Expires: 1992-09-29
Abstract
Abstract A replaceable ground engaging tip for mounting on an adapter on the cutting edge of an excavating bucket has a wedge shaped body comprising the wear part of the point and a rearwardly extending straps at the top of the body and a rearwardly extending strap at the bottom of the body. The straps diverge from the body to the rearends of the straps to form an open-sided generally U-shaped opening for the reception of the nose of the adapter. Each strap has a key which extends laterally of the strap near the rearend of the trap. The keys project normal to the straps and engage respective keyways in the adapter. All loads on the tip are transferred to the adapter through the keys and keyways. The tip is a self-locking tip because of the friction produced between the keys and keyways. The loads on the tip are transmitted through the straps in tension-compression rather than in bending so that the straps can be made of quite thin sections. The tip is a high yield tip because the open-sided, thin section straps permit most of the weight of the tip to be concentrated in the wear part of the tip.
Inventors
- 👤 V Stepe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:52
CPC Classifications
E; E02; E02F; E02F9/00; E02F9/28; E02F9/2808; E02F9/2816; E02F9/2833; E02F3/00; E02F3/04; E02F3/28; E02F3/36; E02F3/40; E02F3/401
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
232 words
A replaceable ground engaging tip-adapter combination for mounting on the cutting edge of an excavating bucket, said adapter comprising a nose having upper and lower inclined surfaces extending rearwardly from a forward portion and providing a generally wedge shape, a recessed laterally extending keyway in the upper surface, and a recessed laterally extending keyway in the lower surface, and tip comprising, a wedge shaped body having a sharpened edge at the forward end of the wedge, a rearwardly extending strap at the top of the body, a rearwardly extending strap at the bottom of the body, said straps diverging from the body to form an open-sided, generally U-shaped opening receiving the nose, a key extending laterally of the top strap near the rear end of the strap and projecting normal to the strap and engaged in the keyway in the top surface, a key extending laterally of the lower strap and projecting normal to the strap and engaged in the keyway in the lower surface, said adapter nose and U-shaped opening defining a substantial clearance between the forward portion and the base of the U-shaped opening whereby the only contaCt between the nose and the body is at the extreme rearward ends of the top and bottom straps and the interengaged keys and keyways so that all loads which are applied to the body are transferred into the adapter by the keys.
Claim 2
Dependent Claim
232 words
A replaceable ground engaging tip-adapter combination for mounting on the cutting edge of an excavating bucket, said adapter comprising a nose having upper and lower inclined surfaces extending rearwardly from a forward portion and providing a generally wedge shape, a recessed laterally extending keyway in the upper surface, and a recessed laterally extending keyway in the lower surface, and tip comprising, a wedge shaped body having a sharpened edge at the forward end of the wedge, a rearwardly extending strap at the top of the body, a rearwardly extending strap at the bottom of the body, said straps diverging from the body to form an open-sided, generally U-shaped opening receiving the nose, a key extending laterally of the top strap near the rear end of the strap and projecting normal to the strap and engaged in the keyway in the top surface, a key extending laterally of the lower strap and projecting normal to the strap and engaged in the keyway in the lower surface, said adapter nose and U-shaped opening defining a substantial clearance between the forward portion and the base of the U-shaped opening whereby the only contaCt between the nose and the body is at the extreme rearward ends of the top and bottom straps and the interengaged keys and keyways so that all loads which are applied to the body are transferred into the adapter by the keys.
Claim 3
Dependent Claim
29 words
A replaceable ground engaging tip-adapter combination as defined in claim 1 further including locking means comprises aligned openings in the nose and body and a locking pin extending therethrough.
Claim 4
Dependent Claim
54 words
A replaceable ground engaging tip-adapter combination as defined in claim 2 wherein the forward portion of the nose has an upper section and a lower section defining a space therebetween and a retention means disposed in the space in alignment with the nose opening and engaging the pin for locking the same in place.
Claim 5
Dependent Claim
17 words
The replaceable ground engaging tip-adapter combination of claim 3 wherein the retention means is a split washer.
Claim 6
Dependent Claim
63 words
A replaceable ground engaging tip-adapter combination as defined in claim 2 wherein the open sides of the body permit side mounting of the body on the nose, and the top and bottom straps are thin members loaded substantially only in tension-compression with little or no bending load, whereby the majority of the weight is located in the wedge shaped portion of the body.
Claim 7
Dependent Claim
44 words
A replaceable ground engaging tip-adapter combination as defined in claim 2 wherein frictional engagement of the keys and the keyways produces a self-locking body under steady state load conditions and including a locking means for preventing walking off of the body due to vibrations.
Claim 8
Dependent Claim
40 words
A replaceable ground engaging tip-adapter combination as defined in claim 2 wherein the sharpened edge is angled with respect to the body and the body can be reversed on the nose to provide a runner tip and a digger tip.
Claim 9
Dependent Claim
53 words
A replaceable ground engaging tip-adapter combination as defined in claim 2 further including a plurality of adapters mounted on said cutting edge and extending the width of the bracket and a plurality of said wedge shaped bodies mounted on the adapters in side by side relation to form a forwardly extending cutting edge.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |