US3734320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Support means for boom ram
Assignee: Case LLC
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Filing: 1972-01-12
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Granted: 1973-05-22
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Expires: 1992-01-12
Abstract
Abstract The invention relates to an improved support means for a boom ram that swings a boom about a horizontal pivot axis on a support. The support means consists of a link pivoted on the support with the cylinder of the ram pivotally carried by the link. The support has first and second spaced stops located in the pivotal path of movement for the link. Releasable lock means are carried by the frame and cooperate with the link to maintain the link in engagement with either of the stops defining first and second positions for the link. In one position, the longitudinal axis of the boom is at all times located rearwardly of a vertical plane extending through the boom pivot, while in the second position, the longitudinal axis is located forwardly of the vertical plane when the ram is fully retracted to define a transport position for the boom.
Inventors
- 👤 P Redenbarger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:21
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/28; E02F3/36; E02F3/38; E02F3/388
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
117 words
In a backhoe having a frame and an elongated boom supported at one end about a first pivot on said frame by a fluid ram having relatively movable elements, a ram support comprising a link supported intermediate its ends about a second pivot on said frame, first and second spaced stops on said frame and located in the path of pivotal movement of said link; and releasable lock means carried by said frame and cooperating with said link to maintain said link in either of two positions defining by said stops, said releasable lock means including a member for engaging said link and means for moving said member between engaged and released positions relative to said link.
Claim 2
Dependent Claim
117 words
In a backhoe having a frame and an elongated boom supported at one end about a first pivot on said frame by a fluid ram having relatively movable elements, a ram support comprising a link supported intermediate its ends about a second pivot on said frame, first and second spaced stops on said frame and located in the path of pivotal movement of said link; and releasable lock means carried by said frame and cooperating with said link to maintain said link in either of two positions defining by said stops, said releasable lock means including a member for engaging said link and means for moving said member between engaged and released positions relative to said link.
Claim 3
Dependent Claim
50 words
A backhoe as defined in claim 1, in which said member has an inclined camming surface and said link has first and second cooperating surfaces located at substantially right angles to each other, said inclined camming surface engaging one of said cooperating surfaces in the respective positions for said link.
Claim 4
Dependent Claim
33 words
A backhoe as defined in claim 1, in which said means for moving includes a cylinder connected to said frame and a piston rod reciprocated in said cylinder and connected to said member.
Claim 5
Dependent Claim
82 words
A backhoe as defined in claim 1, in which said elongated boom has a longitudinal axis and in which a major portion of said axis is located on one side of said pivot as said elements are extended and retracted when said link is located in one of said positions and the major portion of said axis is moved to the opposite side of said axis when said link is in the other of said positions and said elements are fully retracted.
Claim 6
Dependent Claim
151 words
A backhoe including a frame having first and second vertically spaced pivot means; a boom pivoted at one end on said first pivot means; a link pivoted on said second pivot means; a fluid ram having first and second elements relatively movable between extended and retracted positions with one of said elements pivoted to said link at a location spaced from said second pivot means and the other of said elements pivoted to said boom at a location spaced from said first pivot means, said link having a first position locating said boom on one side of a vertical plane extending through said first pivot means, said link being movable from said first position to a second position, said second position for said link accommodating movement of said boom to the opposite side of said vertical plane upon complete retraction of said elements to define a transport position for said boom.
Claim 7
Dependent Claim
151 words
A backhoe including a frame having first and second vertically spaced pivot means; a boom pivoted at one end on said first pivot means; a link pivoted on said second pivot means; a fluid ram having first and second elements relatively movable between extended and retracted positions with one of said elements pivoted to said link at a location spaced from said second pivot means and the other of said elements pivoted to said boom at a location spaced from said first pivot means, said link having a first position locating said boom on one side of a vertical plane extending through said first pivot means, said link being movable from said first position to a second position, said second position for said link accommodating movement of said boom to the opposite side of said vertical plane upon complete retraction of said elements to define a transport position for said boom.
Claim 8
Dependent Claim
26 words
A backhoe as defined in claim 5, further including means defining a cradle on said frame for receiving and supporting said boom in the transport position.
Claim 9
Dependent Claim
51 words
A backhoe as defined in claim 5, in which said frame has first and second stops located in the path of said linK and defining said first and second positions for said link; further including lock means for maintaining said link against said stops in the respective positions for said link.
Claim 10
Dependent Claim
56 words
A backhoe as defined in claim 7, in which said lock means includes a member having an inclined camming surface and means for moving said member between retracted and extended positions on said frame, said link having first and second angularly related surfaces respectively engaged by said camming surface in the respective positions for said link.
Claim 11
Dependent Claim
103 words
In a backhoe having a frame and a boom pivoted at one end on the lower portion of said frame by a fluid ram, a ram support comprising a link pivoted between extreme positions on the upper portion of said frame with said ram pivoted on said link at a location spaced from the pivot for said link; and lock means cooperating with said link for maintaining said link in either of said extreme positions, said lock means including a wedge operating with said link and drive means between said frame and said wedge for moving said wedge between locked and released positions.
Claim 12
Dependent Claim
103 words
In a backhoe having a frame and a boom pivoted at one end on the lower portion of said frame by a fluid ram, a ram support comprising a link pivoted between extreme positions on the upper portion of said frame with said ram pivoted on said link at a location spaced from the pivot for said link; and lock means cooperating with said link for maintaining said link in either of said extreme positions, said lock means including a wedge operating with said link and drive means between said frame and said wedge for moving said wedge between locked and released positions.
Claim 13
Dependent Claim
44 words
A backhoe as defined in claim 9, in which said wedge has an inclined camming surface and said link has a pair of cooperating surfaces angularly related to each other and respectively engaged by said camming surface in the extreme positions for said link.
Claim 14
Dependent Claim
47 words
A backhoe as defined in claim 10, further including guide means on said frame for said wedge, and in which said drive means includes a cylinder and piston rod assembly between said wedge and frame to move said wedge between locked and released positions on said frame.
References Cited (Backward Citations)
US3214040A
Cited
US3376984A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |