Patent US4365792A successfully refreshed from Google Patents.
US4365792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic mould clamp
Assignee: Johns Consolidated Ltd
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Filing: 1980-11-12
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Granted: 1982-12-28
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Expires: 2000-11-12
Abstract
Abstract A clamp is disclosed which has a clamp block provided with a clamp surface for engaging a mould, die or the like. The clamp has a wedging member engageable with the clamp block and a rod receivable in a bore in the block. The rod is normally biased out of the bore so that a piston and cylinder assembly can be actuated so that the piston moves the rod and wedging member and also the clamp block to a position adjacent the mould, die or the like, whereupon continued movement of the piston forces the rod into the bore and the wedge member under the clamp block to pivot the clamp block into clamping engagement with the mould, die or the like.
Inventors
- 👤 Roy W. Johns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 06:39
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/1742; B25; B25B; B25B5/00; B25B5/06; B25B5/061; B25B5/064; B25B5/08; B25B5/087; B30; B30B; B30B15/00; B30B15/02; B30B15/026
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
236 words
A clamp comprising a clamping member provided with a clamping surface for engaging a portion of a workpiece, means for locating the clamping member so that the clamping surface is adjacent the workpiece, means for pivoting the clamping member to clamp the clamping member against the workpiece wherein said pivoting means comprises a wedging member which is engageable with the clamping member to pivot the clamping member into clamping engagement with the workpiece wherein said locating means moves said clamping member to a position adjacent the workpiece and said pivoting means is moveable relative to said clamping member when the clamping member is adjacent the workpiece said pivoting means forming part of the locating means so that the relative movement between the locating means and the clamping member causes the pivoting means to engage the clamping member and pivot the clamping member into engagement with the workpiece; and wherein said pivoting means further comprises a wedging member, and biasing means disposed between the clamping member and the wedging member for maintaining a constant distance between the wedging member and clamping member until the clamping member ceases to move whereupon continued movement of the locating means causes said wedging member to move relative to the clamping member against the bias of said biasing means so that a wedging surface on the wedging member engages the clamping member to pivot the clamping member to clamp against the workpiece.
Claim 2
Dependent Claim
236 words
A clamp comprising a clamping member provided with a clamping surface for engaging a portion of a workpiece, means for locating the clamping member so that the clamping surface is adjacent the workpiece, means for pivoting the clamping member to clamp the clamping member against the workpiece wherein said pivoting means comprises a wedging member which is engageable with the clamping member to pivot the clamping member into clamping engagement with the workpiece wherein said locating means moves said clamping member to a position adjacent the workpiece and said pivoting means is moveable relative to said clamping member when the clamping member is adjacent the workpiece said pivoting means forming part of the locating means so that the relative movement between the locating means and the clamping member causes the pivoting means to engage the clamping member and pivot the clamping member into engagement with the workpiece; and wherein said pivoting means further comprises a wedging member, and biasing means disposed between the clamping member and the wedging member for maintaining a constant distance between the wedging member and clamping member until the clamping member ceases to move whereupon continued movement of the locating means causes said wedging member to move relative to the clamping member against the bias of said biasing means so that a wedging surface on the wedging member engages the clamping member to pivot the clamping member to clamp against the workpiece.
Claim 3
Dependent Claim
15 words
A clamp according to claim 1, wherein said biasing means comprises a lost motion spring.
Claim 4
Dependent Claim
50 words
A clamp according to claim 1, wherein said locating means comprises a piston and cylinder assembly, the piston being coupled to the wedging member and the lost motion spring for moving the clamping member into engagement with the workpiece and for moving the wedging member relative to the clamping member.
Claim 5
Dependent Claim
45 words
A clamp according to claim 1, wherein said clamping member ceases to move by either the clamping surface on the clamping member engaging the workpiece or a stop means on the clamping member abuts against a fixed member to limit movement of the clamping member.
Claim 6
Dependent Claim
42 words
A clamp according to claim 4, wherein said stop means is a pin and the fixed member is provided by ends of an elongated opening which receives one end of the pin, said elongated opening being provided on a clamp supporting member.
Claim 7
Dependent Claim
35 words
A clamp according to claim 1, wherein said clamping member includes a biasing means to bias the clamping member such that the clamping surface on the clamping member engages the desired portion of the workpiece.
Claim 8
Dependent Claim
140 words
A clamp having a clamping block provided with a clamping surface for engaging a workpiece, said clamp having a locating means, said locating means being coupled to a wedging member and to a rod received in a bore in said clamping block, said rod being biased by biasing means against movement into said bore, and said clamping block having a surface engageable by said wedging member, such that said locating means moves said rod to in turn move said clamping block and wedging member until said clamping block stops adjacent said workpiece and whereupon continued movement of said locating means causes said rod to move into said bore against the bias of said biasing means so that the wedging member moves relative to the clamping block to pivot the clamping block so that the clamping block clampingly engages the workpiece.
Claim 9
Dependent Claim
140 words
A clamp having a clamping block provided with a clamping surface for engaging a workpiece, said clamp having a locating means, said locating means being coupled to a wedging member and to a rod received in a bore in said clamping block, said rod being biased by biasing means against movement into said bore, and said clamping block having a surface engageable by said wedging member, such that said locating means moves said rod to in turn move said clamping block and wedging member until said clamping block stops adjacent said workpiece and whereupon continued movement of said locating means causes said rod to move into said bore against the bias of said biasing means so that the wedging member moves relative to the clamping block to pivot the clamping block so that the clamping block clampingly engages the workpiece.
Claim 10
Dependent Claim
39 words
A clamp according to claim 7 wherein, said clamping block stops adjacent said workpiece by either engaging said workpiece or a stop means on the clamping block abuts against a fixed member to limit movement of the clamping block.
Claim 11
Dependent Claim
45 words
A clamp according to claim 7 or claim 8, wherein said wedging member engages the rear of the clamping block and when the wedging member moves relative to the clamping block the wedging member is forced under the clamping block to pivot the clamping block.
Claim 12
Dependent Claim
26 words
A clamp according to claim 7 or claim 8, wherein the wedging member has a wedging surface provided with a taper on between 10° and 14°.
Claim 13
Dependent Claim
19 words
A clamp according to claim 7 or claim 8, wherein said locating means comprises a piston and cylinder assembly.
Claim 14
Dependent Claim
95 words
A clamp according to claim 7 or claim 8, wherein said clamp is provided with a pair of side members and a base, the clamping block being movable on said base and said clamping block having a cut out portion at its rear, said wedging member also being moveable on said base and being received in said cut out portion, said side portions having recesses which receive a pin means provided on said clamping block to limit movement of the clamping block by the pin means engaging ends of the recess in the side portions.
Claim 15
Dependent Claim
97 words
A clamp according to claim 7, wherein said clamping block has a thrust block which is pivoted to the clamping block, said bore being provided in the thrust block, said thrust block being spaced from said clamping block so that as the clamping block is pivoted the clamping block pivots relative to the thrust block to take up said space and said rod being pivotally coupled to said wedging member so that the clamping block, thrust block and rod can pivot about the pivotal couple when the clamping block is pivoted into clamping engagement with the workpiece.
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) | 1985-12-27 | 1986-06-28 | 1986-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-27 | 1990-06-28 | 1990-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-27 | 1994-06-28 | 1994-12-28 | $7700.00 | Window Closed / Lapsed |