US3897660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for automatically removing fins of castings
Assignee: Individual
•
Filing: 1974-09-11
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Granted: 1975-08-05
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Expires: 1994-09-11
Abstract
Abstract An apparatus for automatically removing fins of castings wherein respective air springs are provided to resist a component in the normal direction and a component in the tangential direction with respect to the hone grinding surface of the contact surface of a hone and work of the grinding resistance applied to the grindinghone and are made to be fed with air pressures set in response to the size, thickness and the material of the fin of the work and a motor to control the work in the direction of the component in the normal direction and a motor to control it in the direction of the component in the tangential direction by converting the displacements of the above mentioned air springs to electric signals with two differential transformers are provided.
Inventors
- 👤 Kenji Chijiiwa
- 👤 Katsuo Shirahige
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 03:08
CPC Classifications
B; B24; B24B; B24B49/00; B24B49/16; B24B19/00; B24B9/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
156 words
An apparatus for automatically removing fins of castings characterized by comprising a first air spring means for resisting a component in the normal direction with respect to the hone grinding surface of the contact surface of a hone and work of the grinding resistance applied to the grinding hone, a second air spring means for resisting a component in the tangential direction, a means of feeding said two air spring means with desired air pressure set in response to the fin of the work, a first differential transformer for converting the displacement of said first air spring means to an electric signal, a second differential transformer for converting the displacement of said second air spring to an electric signal, a first motor means for controlling said work in the direction of said component in the normal direction and a second motor means for controlling said work in the direction of said component in the tangential direction.
Claim 2
Independent Claim
156 words
An apparatus for automatically removing fins of castings characterized by comprising a first air spring means for resisting a component in the normal direction with respect to the hone grinding surface of the contact surface of a hone and work of the grinding resistance applied to the grinding hone, a second air spring means for resisting a component in the tangential direction, a means of feeding said two air spring means with desired air pressure set in response to the fin of the work, a first differential transformer for converting the displacement of said first air spring means to an electric signal, a second differential transformer for converting the displacement of said second air spring to an electric signal, a first motor means for controlling said work in the direction of said component in the normal direction and a second motor means for controlling said work in the direction of said component in the tangential direction.
Claim 3
Dependent Claim
48 words
An apparatus for automatically removing fins of castings according to claim 1 characterized in that said first air spring means is provided between two parallel supporting stands which are connected with each other by means of a pin through a supporting frame of one of the supporting stands.
Claim 4
Dependent Claim
29 words
An apparatus for automatically removing fins of castings according to claim 1 characterized in that a hone shaft unit includes said second air spring means and second differential transformer.
Claim 5
Dependent Claim
69 words
An apparatus for automatically removing fins of castings according to claim 3 characterized in that said hone shaft unit further includes a hone rotary shaft, a pulley provided at one end of said rotary shaft to hang belts, a pair of pressure receiving plates, a pair of bearings, a pair of stroke bearings provided on the outer periphery of said shaft and a hone shaft barrel containing these members.
Claim 6
Dependent Claim
96 words
An apparatus for automatically removing fins of castings according to claim 2 characterized in that the air pressure of said first air spring means is set by the formula Fn X L l X Pn wherein Fn is a component in the normal direction with respect to the hone grinding surface of the contact surface of the hone and work, Pn is a component in the tangential direction, l is a distance between the pin and air spring means and L is a distance between the pin and the contact point of the fin and hone.
Claim 7
Dependent Claim
52 words
An apparatus for automatically removing fins of castings according to claim 2 characterized in that the air pressure of said second air spring means is set by rotating a pressure reducing valve so as to feed an air pressure corresponding to said component in the tangential direction just when the grinding ends.
Claim 8
Dependent Claim
42 words
An apparatus for automatically removing fins of castings according to claim 1 characterized in that said first differential transformer consists of a core and spring, the core is deviated upward by the spring and the generated voltage in this state is positive.
Claim 9
Independent Claim
39 words
An apparatus for automatically removing fins of castings according to calim 1 characterized in that said means of feeding the first air spring means with an air pressure comprises a compressed air source, a pressure reducing valve and paths.
Claim 10
Independent Claim
39 words
An apparatus for automatically removing fins of castings according to calim 1 characterized in that said means of feeding the first air spring means with an air pressure comprises a compressed air source, a pressure reducing valve and paths.
Claim 11
Dependent Claim
49 words
An apparatus for automatically removing fins of castings according to claim 1 characterized in that said means Of feeding the second air spring means with an air pressure comprises a compressed air source, a pressure reducing valve, paths in both end walls of the shaft barrel and annular paths.
References Cited (Backward Citations)
US3274738A
Cited
US3672100A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-04 | 1979-02-03 | 1979-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-04 | 1983-02-03 | 1983-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-04 | 1987-02-03 | 1987-08-05 | $7700.00 | Window Closed / Lapsed |