US3792740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic powered hammer
Assignee: Individual
•
Filing: 1972-04-05
•
Granted: 1974-02-19
•
Expires: 1992-04-05
Abstract
Abstract A gas spring-driven hydraulically cocked powered hammer wherein the hammer head is resiliently guided by liquid springs to absorb the energy of glancing blows and includes a ball joint disposed between the head and driving shaft, the driving piston being slidably fitted into a cylinder which is also resiliently mounted, the piston shaft and head being cocked by hydraulic pressure against a floating ring and being held in the cocked position by a friction lock while the ring is retracted, the friction lock then being released to fire the hammer with shock absorbers to engage the head and dissipate the energy should the head fail to strike its target.
Inventors
- 👤 W Cooley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:20
CPC Classifications
B; B25; B25D; B25D9/00; B25D9/14; B25D9/145; B25D17/00; B25D17/08; B25D17/24; B25D17/245
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
178 words
A hydraulic hammer comprising an elongated frame member having upper and lower extremities, guide means carried by the lower extremity of said frame serving to align a hammer head axially of said frame member, cylinder means, having upper and lower closure members, supported at the upper extremity of said frame member, piston means in said cylinder dividing said cylinder into upper and lower chambers, said piston means including shaft means extending from the lower closure member and terminating in a ball member seated in a socket member in said hammer head, lock means for controlling reciprocable movement of said shaft, resilient support means mounted to said frame member for resiliently and deflectably supporting said cylinder means; said cylinder means, said piston means, said shaft means and said lock means being displaceable as a unit about said socket member as a result of said resilient support means, and power means communicating with the lower chamber arranged for first advancing the piston into a cocked position and thence to release said power means to transmit force to said hammer head.
Claim 2
Dependent Claim
178 words
A hydraulic hammer comprising an elongated frame member having upper and lower extremities, guide means carried by the lower extremity of said frame serving to align a hammer head axially of said frame member, cylinder means, having upper and lower closure members, supported at the upper extremity of said frame member, piston means in said cylinder dividing said cylinder into upper and lower chambers, said piston means including shaft means extending from the lower closure member and terminating in a ball member seated in a socket member in said hammer head, lock means for controlling reciprocable movement of said shaft, resilient support means mounted to said frame member for resiliently and deflectably supporting said cylinder means; said cylinder means, said piston means, said shaft means and said lock means being displaceable as a unit about said socket member as a result of said resilient support means, and power means communicating with the lower chamber arranged for first advancing the piston into a cocked position and thence to release said power means to transmit force to said hammer head.
Claim 3
Dependent Claim
19 words
A hydraulic hammer as claimed in claim 1, wherein resilient means are interposed between the ball and socket members.
Claim 4
Dependent Claim
34 words
A hydraulic hammer as claimed in claim 1, wherein the socket member provided in said hammer head is disposed substantially medially of the extent of said hammer head and the ball member terminates therein.
Claim 5
Dependent Claim
20 words
A hydraulic hammer as claimed in claim 3, wherein a sleeve member retains said ball member in said socket member.
Claim 6
Dependent Claim
15 words
A hydraulic hammer as claimed in claim 1, wherein the frame member includes trunnion members.
Claim 7
Dependent Claim
18 words
A hydraulic hammer as claimed in claim 1, wherein the lower closure member comprises a hydraulically actuatable follower.
Claim 8
Dependent Claim
30 words
A hydraulic hammer as claimed in claim 1, wherein the lower closure member comprises a hydraulically actuatable follower and a spring means is interposed between said follower and said piston.
Claim 9
Dependent Claim
15 words
A hydraulic hammer as claimed in claim 1, wherein said lock means is hydraulically actuated.
Claim 10
Dependent Claim
30 words
A hydraulic hammer as claimed in claim 8, wherein the hydraulically actuated lock means for said shaft is disengaged therefrom when the piston is advanced into a hydraulically cocked position.
Claim 11
Dependent Claim
20 words
A hydraulic hammer as claimed in claim 1, wherein said guide means are horizontally aligned and disposed in parallel planes.
Claim 12
Dependent Claim
24 words
A hydraulic hammer as claimed in claim 1, wherein the ball and socket members intersect at the center of rotation of said hammer head.
Claim 13
Dependent Claim
28 words
A hydraulic hammer as claimed in claim 11, wherein said center of rotation of said hammer head is associated with a center of percussion at the hammer tip.
Claim 14
Dependent Claim
56 words
A hydraulic hammer as claimed in claim 1, wherein the cylinder support is placed at the center of rotation of a drive system including said cylinder means, said upper and lower closure members, said piston means, said shaft Means and said lock means when a transverse shock load is applied to the ball and socket members.
Claim 15
Dependent Claim
15 words
A hydraulic hammer as claimed in claim 1, wherein the guide means comprise liquid springs.
References Cited (Backward Citations)
US2672847A
Cited
US3015312A
Cited
US3150571A
Cited
US3509723A
Cited
US3605916A
Cited
US3631760A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |