US3568569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drives for broaching machines and the like
Assignee: Acme Precision Products Inc
•
Filing: 1969-03-05
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Granted: 1971-03-09
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Expires: 1989-03-05
Abstract
Abstract A broaching machine having a chain drive in which the chain is trained over idler sprockets that are yieldingly mounted to tension the chain by means of grease filled cylinders.
Inventors
- 👤 Wilburn K Haley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:01
CPC Classifications
B; B23; B23Q; B23Q7/00; B23Q7/03; Y; Y10; Y10T; Y10T409/00; Y10T409/40; Y10T409/4035
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
106 words
In a Broaching machine, the combination comprising: a workpiece support; a broaching tool; flexible endless conveyor means for moving said workpiece support relative to said broaching tool; said last-mentioned means comprising at least one rotary drive member engaging said endless support means and at least one rotary idler member over which said support means is trained; means for supporting said idler member for relative movement with respect to said drive member; fluid operated means yieldingly urging said idler means in a direction to place said endless conveyor means under tension; and means responsive to a predetermined pressure in said fluid operated means to create a signal.
Claim 2
Dependent Claim
106 words
In a Broaching machine, the combination comprising: a workpiece support; a broaching tool; flexible endless conveyor means for moving said workpiece support relative to said broaching tool; said last-mentioned means comprising at least one rotary drive member engaging said endless support means and at least one rotary idler member over which said support means is trained; means for supporting said idler member for relative movement with respect to said drive member; fluid operated means yieldingly urging said idler means in a direction to place said endless conveyor means under tension; and means responsive to a predetermined pressure in said fluid operated means to create a signal.
Claim 3
Dependent Claim
41 words
The combination set forth in claim 1 wherein said fluid operated means comprises a cylinder having a cylinder housing and a piston, one of said cylinder and said piston being fixed and the other being operatively connected to said idler member.
Claim 4
Dependent Claim
19 words
The combination set forth in claim 2 wherein said cylinder includes a fluid which is sealed within said cylinder.
Claim 5
Dependent Claim
19 words
The combination set forth in claim 3 including means for varying the pressure of the fluid in the cylinder.
Claim 6
Dependent Claim
15 words
The combination set forth in claim 3 wherein said fluid is of the incompressible type.
Claim 7
Dependent Claim
14 words
The combination set forth in claim 5 wherein said incompressible-type fluid comprises a grease.
Claim 8
Dependent Claim
21 words
The combination set forth in claim 1 including means responsive to said signal for interrupting the drive to said drive member.
Claim 9
Dependent Claim
22 words
The combination set forth in claim 1 wherein said endless conveyor means comprises a chain, said drive and idler members comprising sprockets.
Claim 10
Dependent Claim
36 words
The combination set forth in claim 8 wherein said fluid operated means comprises a cylinder assembly including a cylinder housing a piston, said piston having a piston shaft engaging said means for supporting said idler member.
Claim 11
Dependent Claim
23 words
The combination set forth in claim 9 including hardened interengaging portions between said piston shaft and said means for supporting said idler member.
Claim 12
Dependent Claim
38 words
The combination set forth in claim 1 wherein said fluid operated means comprises a pair of cylinder assemblies, said idler member including a shaft, and spaced portions of said shaft being engaged with the pistons of said cylinders.
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) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |